# -*- coding: utf-8 -*-
# noinspection PyPep8Naming
"""
/***************************************************************************
                              EO Time Series Viewer
                              -------------------
        begin                : 2015-08-20
        git sha              : $Format:%H$
        copyright            : (C) 2017 by HU-Berlin
        email                : benjamin.jakimow@geo.hu-berlin.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
"""

import os
import sys
import re
import fnmatch
import collections
import copy
import enum
import traceback
import typing
import math
import numpy as np
import time
import qgis.utils
from qgis.PyQt.QtCore import \
    Qt, QSize, pyqtSignal, QModelIndex, QTimer, QAbstractListModel, QMargins
from qgis.PyQt.QtGui import \
    QColor, QIcon, QGuiApplication, QMouseEvent, QKeySequence
from qgis.PyQt.QtWidgets import \
    QWidget, QLayoutItem, QFrame, QLabel, QGridLayout, QSlider, QMenu, \
    QToolBox, QDialog, QAction, QSpinBox, QCheckBox, QLineEdit, QWidgetItem, QSpacerItem, QLayout
from qgis.PyQt.QtXml import \
    QDomDocument, QDomNode, QDomElement

from qgis.core import \
    QgsCoordinateReferenceSystem, QgsVectorLayer, QgsTextFormat, QgsProject, \
    QgsRectangle, QgsRasterRenderer, QgsMapLayerStore, QgsMapLayerStyle, \
    QgsLayerTreeModel, QgsLayerTreeGroup, QgsPointXY, \
    QgsLayerTree, QgsLayerTreeLayer, QgsReadWriteContext, QgsVector, \
    QgsRasterLayer, QgsVectorLayer, QgsMapLayer, QgsMapLayerProxyModel, QgsColorRamp, \
    QgsSingleBandPseudoColorRenderer, QgsExpressionContextGenerator, QgsExpressionContext, \
    QgsExpressionContextUtils, QgsExpression, QgsExpressionContextScope
from qgis.gui import \
    QgsDockWidget, QgsMapCanvas, QgsMapTool, QgsCollapsibleGroupBox, QgsLayerTreeView, \
    QgisInterface, QgsLayerTreeViewMenuProvider, QgsLayerTreeMapCanvasBridge, \
    QgsProjectionSelectionWidget, QgsMessageBar, QgsFieldExpressionWidget, QgsFilterLineEdit, \
    QgsExpressionLineEdit, QgsExpressionBuilderDialog, QgsAttributeForm
from .externals.qps.crosshair.crosshair import getCrosshairStyle, CrosshairStyle, CrosshairMapCanvasItem
from .externals.qps.layerproperties import VectorLayerTools
from .externals.qps.maptools import MapTools
from .mapcanvas import MapCanvas, MapCanvasInfoItem, KEY_LAST_CLICKED
from .timeseries import SensorInstrument, TimeSeriesDate, TimeSeries, SensorProxyLayer
from .utils import loadUi, SpatialPoint, SpatialExtent, datetime64
from eotimeseriesviewer import DIR_UI
from eotimeseriesviewer.utils import fixMenuButtons

KEY_LOCKED_LAYER = 'eotsv/locked'
KEY_SENSOR_GROUP = 'eotsv/sensorgroup'
KEY_SENSOR_LAYER = 'eotsv/sensorlayer'


def equalTextFormats(tf1: QgsTextFormat, tf2: QgsTextFormat) -> True:
    if not (isinstance(tf1, QgsTextFormat) and isinstance(tf2, QgsTextFormat)):
        return False
    return tf1.toMimeData().text() == tf2.toMimeData().text()


class MapViewLayerTreeModel(QgsLayerTreeModel):
    """
    Layer Tree as shown in a MapView
    """

    def __init__(self, rootNode, parent=None):
        super(MapViewLayerTreeModel, self).__init__(rootNode, parent=parent)


class MapViewExpressionContextGenerator(QgsExpressionContextGenerator):

    def __init__(self, *args, **kwds):
        super().__init__(*args, **kwds)
        self.mMapView: MapView = None

    def setMapView(self, mapView):
        self.mMapView = mapView

    def createExpressionContext(self) -> QgsExpressionContext:
        context = QgsExpressionContext([QgsExpressionContextUtils.projectScope(QgsProject.instance())])

        if False and isinstance(self.mMapView, MapView):
            canvas = self.mMapView.currentMapCanvas()
            context.appendScope(canvas.expressionContextScope())
        # self._context = context
        return context


class MapView(QFrame):
    """
    A MapView defines how a single map canvas visualizes sensor specific EOTS data plus additional vector overlays
    """
    # sigVisibilityChanged = pyqtSignal(bool)
    sigCanvasAppearanceChanged = pyqtSignal()
    sigCrosshairChanged = pyqtSignal()
    sigTitleChanged = pyqtSignal(str)
    sigSensorRendererChanged = pyqtSignal(SensorInstrument, QgsRasterRenderer)
    sigCurrentLayerChanged = pyqtSignal(QgsMapLayer)
    sigShowProfiles = pyqtSignal(SpatialPoint, MapCanvas, str)

    def __init__(self, name='Map View', parent=None):
        super(MapView, self).__init__(parent)
        loadUi(DIR_UI / 'mapview.ui', self)
        # self.setupUi(self)

        from eotimeseriesviewer.settings import values, Keys, defaultValues, value

        DEFAULT_VALUES = defaultValues()
        self.mMapBackgroundColor: QColor = value(Keys.MapBackgroundColor,
                                                 default=DEFAULT_VALUES.get(Keys.MapBackgroundColor, QColor('black')))
        self.mMapTextFormat: QgsTextFormat = value(Keys.MapTextFormat,
                                                   default=DEFAULT_VALUES.get(Keys.MapTextFormat, QgsTextFormat()))
        self.mMapWidget = None

        self.mLayerStyleInitialized: typing.Dict[SensorInstrument, bool] = dict()

        self.mTimeSeries = None
        self.mSensorLayerList = list()
        self.mCrossHairStyle = CrosshairStyle()

        m = QMenu(self.btnToggleCrosshair)
        m.addAction(self.actionSetCrosshairStyle)

        self.btnToggleCrosshair.setMenu(m)
        self.btnToggleCrosshair.setDefaultAction(self.actionToggleCrosshairVisibility)
        self.btnToggleCrosshair.setChecked(self.crosshairStyle().mShow)
        self.btnToggleMapViewVisibility.setDefaultAction(self.actionToggleMapViewHidden)

        self.tbName.textChanged.connect(self.onTitleChanged)

        self.actionSetCrosshairStyle.triggered.connect(self.onChangeCrosshairStyle)
        self.actionToggleMapViewHidden.toggled.connect(self.sigCanvasAppearanceChanged)
        self.actionToggleCrosshairVisibility.toggled.connect(self.setCrosshairVisibility)

        self.actionAddMapLayer.triggered.connect(lambda *args: self.onAddMapLayer())
        self.actionAddVectorLayer.triggered.connect(lambda *args: self.onAddMapLayer(QgsMapLayerProxyModel.VectorLayer))
        self.actionAddRasterLayer.triggered.connect(lambda *args: self.onAddMapLayer(QgsMapLayerProxyModel.RasterLayer))
        self.btnAddLayer.setDefaultAction(self.actionAddMapLayer)
        m = QMenu()
        m.addAction(self.actionAddVectorLayer)
        m.addAction(self.actionAddRasterLayer)
        self.btnAddLayer.setMenu(m)

        self.btnHighlightMapView.setDefaultAction(self.actionHighlightMapView)
        self.actionHighlightMapView.triggered.connect(lambda: self.setHighlighted(True, timeout=500))

        assert isinstance(self.mLayerTreeView, QgsLayerTreeView)

        self.mDummyCanvas = QgsMapCanvas()  # dummy map canvas for dummy layers
        self.mDummyCanvas.setVisible(False)

        self.mLayerTree = QgsLayerTree()
        self.mLayerTreeMapCanvasBridge = QgsLayerTreeMapCanvasBridge(self.mLayerTree, self.mDummyCanvas)

        # self.mLayerTreeModel = QgsLayerTreeModel(self.mLayerTree)
        self.mLayerTreeModel = MapViewLayerTreeModel(self.mLayerTree)

        self.mLayerTreeModel.setFlags(QgsLayerTreeModel.AllowNodeChangeVisibility |
                                      QgsLayerTreeModel.AllowNodeRename |
                                      QgsLayerTreeModel.AllowNodeReorder)

        self._createSensorNode()
        self.mLayerTreeView: QgsLayerTreeView
        self.mLayerTreeView.setModel(self.mLayerTreeModel)
        self.mLayerTreeView.currentLayerChanged.connect(self.sigCurrentLayerChanged.emit)
        self.mMapLayerTreeViewMenuProvider = MapViewLayerTreeViewMenuProvider(self, self.mLayerTreeView,
                                                                              self.mDummyCanvas)

        # register some actions that interact with other GUI elements
        # self.mMapLayerTreeViewMenuProvider.actionAddEOTSVSpectralProfiles.triggered.connect(self.addSpectralProfileLayer)
        # self.mMapLayerTreeViewMenuProvider.actionAddEOTSVTemporalProfiles.triggered.connect(self.addTemporalProfileLayer)

        self.mLayerTreeView.setMenuProvider(self.mMapLayerTreeViewMenuProvider)
        self.mLayerTreeView.currentLayerChanged.connect(self.setCurrentLayer)
        self.mLayerTree.removedChildren.connect(self.onChildNodesRemoved)

        self.mIsVisible = True
        self.setTitle(name)
        self.tbInfoExpression: QLineEdit
        self.mDefaultInfoExpressionToolTip:str = self.tbInfoExpression.toolTip()

        self.tbInfoExpression.textChanged.connect(self.onMapInfoExpressionChanged)
        self.btnShowInfoExpression.setDefaultAction(self.optionShowInfoExpression)
        self.optionShowInfoExpression.toggled.connect(self.tbInfoExpression.setEnabled)
        self.optionShowInfoExpression.toggled.connect(self.actionSetInfoExpression.setEnabled)
        self.btnSetInfoExpression.setDefaultAction(self.actionSetInfoExpression)
        self.actionSetInfoExpression.triggered.connect(self.onSetInfoExpression)

        self._fakeLyr: QgsVectorLayer = QgsVectorLayer("point?crs=epsg:4326", "Scratch point layer", "memory")

        # self.tbInfoExpression.setLayer(self.mLyr)

        # self.mExpressionContextGenerator = MapViewExpressionContextGenerator()
        # self.mExpressionContextGenerator.setMapView(self)

        self.tbInfoExpression.setEnabled(self.optionShowInfoExpression.isChecked())

        # self.tbInfoExpression.registerExpressionContextGenerator(self.mExpressionContextGenerator)
        self.optionShowInfoExpression.toggled.connect(self.sigCanvasAppearanceChanged)
        # self.tbInfoExpression.expressionChanged.connect(self.sigCanvasAppearanceChanged)
        for action in m.actions():
            action.toggled.connect(self.sigCanvasAppearanceChanged)

        fixMenuButtons(self)

    def setInfoExpressionError(self, error: str):

        if error in ['', None]:
            self.tbInfoExpression.setStyleSheet('')
            self.tbInfoExpression.setToolTip(self.mDefaultInfoExpressionToolTip)
        else:

            self.tbInfoExpression.setStyleSheet('QLineEdit#tbInfoExpression{color:red; border: 2px solid red;}')
            self.tbInfoExpression.setToolTip(f'<span style="color:red">{error}</span>')

    def onMapInfoExpressionChanged(self, text: str):

        self.sigCanvasAppearanceChanged.emit()
        s = ""

    def onSetInfoExpression(self, *args):

        context = QgsExpressionContext(QgsExpressionContextUtils.globalProjectLayerScopes(self._fakeLyr))
        c = self.currentMapCanvas()
        if isinstance(c, MapCanvas):
            context.appendScope(QgsExpressionContextScope(c.expressionContextScope()))
        expression = self.tbInfoExpression.text()
        # taken from qgsfeaturefilterwidget.cpp : void QgsFeatureFilterWidget::filterExpressionBuilder()
        dlg = QgsExpressionBuilderDialog(self._fakeLyr, expression,
                                         self,
                                         'generic', context)
        dlg.setWindowTitle('Expression Based Filter')
        # myDa = QgsDistanceArea()
        # myDa.setSourceCrs(self.mLayer.crs(), QgsProject.instance().transformContext())
        # myDa.setEllipsoid(QgsProject.instance().ellipsoid())
        # dlg.setGeomCalculator(myDa)

        if dlg.exec() == QDialog.Accepted:
            self.tbInfoExpression.setText(dlg.expressionText())

    def __iter__(self) -> typing.Iterator[TimeSeriesDate]:
        return iter(self.mapCanvases())

    @staticmethod
    def readXml(node: QDomNode):
        if node.nodeName() == 'MapView':
            nodeMapView = node
        else:
            nodeMapView = node.firstChildElement('MapView')

        if nodeMapView.nodeName() != 'MapView':
            return None

        context = QgsReadWriteContext()
        mapView = MapView()

        def to_bool(value) -> bool:
            return str(value).lower() in ['1', 'true']

        mapView.setName(nodeMapView.attribute('name'))
        mapView.setMapBackgroundColor(QColor(nodeMapView.attribute('bg')))
        mapView.setVisibility(to_bool(nodeMapView.attribute('visible')))

        # mapView.optionShowDate.setChecked(to_bool(nodeMapView.attribute('showDate')))
        # mapView.optionShowSensorName.setChecked(to_bool(nodeMapView.attribute('showSensorName')))
        # mapView.optionShowMapViewName.setChecked(to_bool(nodeMapView.attribute('showMapViewName')))

        # nodeMapView.setAttribute('showDate', str(self.optionShowDate.checked()))
        # nodeMapView.setAttribute('showSensorName', str(self.optionShowSensorName.checked()))
        # nodeMapView.setAttribute('showMapViewName', str(self.optionShowMapViewName.checked()))

        textFormat = mapView.mapTextFormat()
        textFormat.readXml(nodeMapView, context)

        lyrTreeNode = node.firstChildElement('MapViewLayerTree').toElement()

        def copyLayerTree(parentSrc: QgsLayerTreeGroup, parentDst: QgsLayerTreeGroup):


            for child in parentSrc.children():
                if 'eotsv/locked' in child.customProperties():
                    continue
                if isinstance(child, QgsLayerTreeLayer):
                    lyr = child.layer()
                    if isinstance(lyr, QgsMapLayer) and lyr.isValid():
                        parentDst.addChildNode(child.clone())
                    s = ""
                elif isinstance(child, QgsLayerTreeGroup):
                    if 'eotsv/locked' in child.customProperties():
                        continue
                    grp = QgsLayerTreeGroup()
                    grp.setName(child.name())
                    grp.setIsMutuallyExclusive(child.isMutuallyExclusive())
                    parentDst.addChildNode(grp)
                    copyLayerTree(child, grp)

        if not lyrTreeNode.isNull():
            tree: QgsLayerTree = QgsLayerTree.readXml(lyrTreeNode, context)
            tree.resolveReferences(QgsProject.instance(), looseMatching=True)
            if len(tree.children()) > 0:
                copyLayerTree(tree.children()[0], mapView.mLayerTreeModel.rootGroup())
                # move sensor node to last position
                mapView.mLayerTree.removeChildNode(mapView.mLayerTreeSensorNode)
                # will be added again to the bottom
                #mapView.mLayerTree.addChildNode(mapView.mLayerTreeSensorNode)


        lyrNode = node.firstChildElement('MapViewProxyLayer').toElement()
        while lyrNode.nodeName() == 'MapViewProxyLayer':
            sid = lyrNode.attribute('sensor_id')
            styleNode = lyrNode.firstChildElement('LayerStyle')
            style = QgsMapLayerStyle()
            style.readXml(styleNode)
            sensor = SensorInstrument(sid)
            mapView.addSensor(sensor)
            lyr = mapView.sensorProxyLayer(sensor)
            lyr.setMapLayerStyle(style)

            lyrNode = lyrNode.nextSiblingElement()
        return mapView

    def writeXml(self, node: QDomNode, doc: QDomDocument):

        nodeMapView = doc.createElement('MapView')
        nodeMapView.setAttribute('name', self.name())
        nodeMapView.setAttribute('bg', self.mapBackgroundColor().name())
        nodeMapView.setAttribute('visible', str(self.isVisible()))
        nodeMapView.setAttribute('infoexpression', self.mapInfoExpression())

        context = QgsReadWriteContext()
        nodeTextStyle = self.mapTextFormat().writeXml(doc, context)
        nodeMapView.appendChild(nodeTextStyle)

        nodeLayerTree = doc.createElement('MapViewLayerTree')
        self.mLayerTree.writeXml(nodeLayerTree, context)
        nodeMapView.appendChild(nodeLayerTree)

        for sensor in self.sensors():
            lyr = self.sensorProxyLayer(sensor)
            if isinstance(lyr, SensorProxyLayer):
                sensorNode = doc.createElement('MapViewProxyLayer')
                sensorNode.setAttribute('sensor_id', sensor.id())
                style: QgsMapLayerStyle = lyr.mapLayerStyle()
                styleNode = doc.createElement('LayerStyle')
                style.writeXml(styleNode)
                sensorNode.appendChild(styleNode)
                nodeMapView.appendChild(sensorNode)
        node.appendChild(nodeMapView)

    def setName(self, name: str):
        self.setTitle(name)

    def name(self) -> str:
        return self.title()

    def setMapInfoExpression(self, expression: str):
        self.tbInfoExpression.setText(expression)

    def mapInfoExpression(self) -> str:

        return f'{self.tbInfoExpression.text()}'.strip()

    def setMapTextFormat(self, textformat: QgsTextFormat) -> QgsTextFormat:
        if not equalTextFormats(self.mapTextFormat(), textformat):
            self.mMapTextFormat = textformat
            self.sigCanvasAppearanceChanged.emit()
        return self.mapTextFormat()

    def mapTextFormat(self) -> QgsTextFormat:
        return self.mMapTextFormat

    def mapBackgroundColor(self) -> QColor:
        """
        Returns the map background color
        :return: QColor
        """
        return self.mMapBackgroundColor

    def setMapBackgroundColor(self, color: QColor) -> QColor:
        """
        Sets the map background color
        :param color: QColor
        :return: QColor
        """
        if self.mMapBackgroundColor != color:
            self.mMapBackgroundColor = color
            self.sigCanvasAppearanceChanged.emit()
        return self.mMapBackgroundColor

    def visibleMapCanvases(self) -> list:
        """
        Returns the currently visible mapcanvases
        :return: [list-of-MapCanvases]
        """
        return [m for m in self.mapCanvases() if m.isVisibleToViewport()]

    def onAddMapLayer(self, filter: QgsMapLayerProxyModel.Filter = QgsMapLayerProxyModel.All):
        """
        Slot that opens a SelectMapLayersDialog for any kind of layer
        """
        from .externals.qps.utils import SelectMapLayersDialog
        d = SelectMapLayersDialog()

        if filter == QgsMapLayerProxyModel.All:
            title = 'Select Layer'
            text = 'Layer'
        elif filter == QgsMapLayerProxyModel.RasterLayer:
            title = 'Select Raster Layer'
            text = 'Raster'
        elif filter == QgsMapLayerProxyModel.VectorLayer:
            title = 'Select Vector Layer'
            text = 'Vector'
        d.setWindowTitle(title)
        d.addLayerDescription(text, filter)
        if d.exec() == QDialog.Accepted:
            for l in d.mapLayers():
                self.addLayer(l)

    def setCurrentLayer(self, layer: QgsMapLayer):
        """
        Sets the QgsMapCanvas.currentLayer() that is used by some QgsMapTools
        :param layer: QgsMapLayer | None
        :return:
        """
        assert layer is None or isinstance(layer, QgsMapLayer)
        if layer in self.layers():
            self.mLayerTreeView.setCurrentLayer(layer)

            if layer not in self.mSensorLayerList:
                for c in self.mapCanvases():
                    c.setCurrentLayer(layer)
            return True

    def addSpectralProfileLayers(self):
        """Adds the EOTSV Spectral Profile Layers"""
        from eotimeseriesviewer.main import EOTimeSeriesViewer
        tsv = EOTimeSeriesViewer.instance()
        if isinstance(tsv, EOTimeSeriesViewer):
            for lyr in tsv.spectralLibraries():
                if lyr not in self.layers():
                    self.addLayer(lyr)

    def addTemporalProfileLayer(self):
        """Adds the EOTSV Temporal Profile Layer"""
        from eotimeseriesviewer.main import EOTimeSeriesViewer
        tsv = EOTimeSeriesViewer.instance()
        if isinstance(tsv, EOTimeSeriesViewer):
            lyr = tsv.temporalProfileLayer()
            if lyr not in self.layers():
                self.addLayer(lyr)

    def addLayer(self, layer: QgsMapLayer):
        """
        Add a QgsMapLayer to the MapView layer tree
        :param layer: QgsMapLayer
        """
        if isinstance(layer, QgsVectorLayer):
            self.mLayerTree.insertLayer(0, layer)
        else:
            self.mLayerTree.addLayer(layer)

    def _createSensorNode(self):
        self.mLayerTreeSensorNode = QgsLayerTreeGroup(name='Raster Time Series', checked=True)
        self.mLayerTreeSensorNode.setCustomProperty(KEY_LOCKED_LAYER, True)
        self.mLayerTreeSensorNode.setCustomProperty(KEY_SENSOR_GROUP, True)
        self.mLayerTree.addChildNode(self.mLayerTreeSensorNode)

    def _containsSensorNode(self, root: QgsLayerTreeGroup) -> bool:
        assert isinstance(root, QgsLayerTreeGroup)
        if root.customProperty(KEY_SENSOR_GROUP) in [True, 'true']:
            return True
        for grp in root.findGroups():
            if self._containsSensorNode(grp):
                return True
        return False

    def onChildNodesRemoved(self, node, idxFrom, idxTo):
        if not self._containsSensorNode(self.mLayerTreeModel.rootGroup()):
            self._createSensorNode()

    def onChangeCrosshairStyle(self):

        canvases = self.mapCanvases()
        if len(canvases) > 0:
            mapCanvas = canvases[0]
        else:
            mapCanvas = None

        style = getCrosshairStyle(parent=self, crosshairStyle=self.crosshairStyle(), mapCanvas=mapCanvas)
        if isinstance(style, CrosshairStyle):
            self.setCrosshairStyle(style)

    def setVisibility(self, b: bool):
        """
        Sets the map view visibility
        :param b: bool
        """
        assert isinstance(b, bool)

        changed = False

        if self.actionToggleMapViewHidden.isChecked() == b:
            self.actionToggleMapViewHidden.setChecked(not b)

        if changed:
            self.sigCanvasAppearanceChanged.emit()

    def isVisible(self) -> bool:
        """
        Returns the map view visibility
        :return: bool
        """
        return not self.actionToggleMapViewHidden.isChecked()

    def mapWidget(self):
        return self.mMapWidget

    def mapCanvases(self) -> typing.List[MapCanvas]:
        """
        Returns the MapCanvases related to this map view. Requires that this mapview was added to a MapWidget
        :return: [list-of-MapCanvases]
        """

        if isinstance(self.mMapWidget, MapWidget):
            return self.mMapWidget.mapViewCanvases(self)
        else:
            return []

    def onTitleChanged(self, *args):

        self.setWindowTitle('Map View "{}"'.format(self.title()))
        self.sigTitleChanged.emit(self.title())
        self.sigCanvasAppearanceChanged.emit()

    def setMapWidget(self, w):
        if isinstance(w, MapWidget):
            self.mMapWidget = w
        else:
            self.mMapWidget = None

    def setTimeSeries(self, timeSeries: TimeSeries):
        """
        Conntects the MapView with a TimeSeries.
        :param timeSeries: TimeSeries
        """
        assert isinstance(timeSeries, TimeSeries)

        for s in self.sensors():
            self.removeSensor(s)

        self.mTimeSeries = timeSeries
        self.mTimeSeries.sigSensorAdded.connect(self.addSensor)
        self.mTimeSeries.sigSensorRemoved.connect(self.removeSensor)
        for s in timeSeries.sensors():
            self.addSensor(s)

    def timeSeries(self) -> TimeSeries:
        """
        Returns the TimeSeries this mapview is connected with
        :return: TimeSeries
        """
        return self.mTimeSeries

    def setTitle(self, title: str):
        """
        Sets the widget title
        :param title: str
        """
        old = self.title()
        if old != title:
            self.tbName.setText(title)

    def visibleLayers(self) -> typing.List[QgsMapLayer]:
        """
        Returns the visible layers, including proxy layer for time-series data
        :return: [list-of-QgsMapLayers]
        """
        return [l for l in self.mLayerTree.checkedLayers() if isinstance(l, QgsMapLayer)]

    def layers(self) -> typing.List[QgsMapLayer]:
        """
        Returns all layers, including invisible or proxy layers for time-series data
        :return: [list-of-QgsMapLayers]
        """
        nodes = self.mLayerTree.findLayers()
        return [n.layer() for n in nodes if isinstance(n.layer(), QgsMapLayer)]

    def title(self, maskNewLines=True) -> str:
        """
        Returns the MapView title
        :return: str
        """
        if maskNewLines:
            return self.tbName.text().replace('\\n', ' ').strip()
        else:
            return self.tbName.text().strip()

    def setCrosshairStyle(self, crosshairStyle: CrosshairStyle) -> CrosshairStyle:
        """
        Seths the CrosshairStyle of this MapView
        :param crosshairStyle: CrosshairStyle
        """

        if self.mCrossHairStyle != crosshairStyle:
            self.mCrossHairStyle = crosshairStyle
            self.sigCrosshairChanged.emit()

        return self.mCrossHairStyle

    def setHighlighted(self, b=True, timeout=1000):
        """
        Activates or deactivates a red-line border of the MapCanvases
        :param b: True | False to activate / deactivate the highlighted lines-
        :param timeout: int, milliseconds how long the highlighted frame should appear
        """
        styleOn = """.MapCanvas {
                    border: 4px solid red;
                    border-radius: 4px;
                }"""
        styleOff = """"""
        if b is True:
            for mapCanvas in self.mapCanvases():
                mapCanvas.setStyleSheet(styleOn)
            if timeout > 0:
                QTimer.singleShot(timeout, lambda: self.setHighlighted(False))
        else:
            for mapCanvas in self.mapCanvases():
                mapCanvas.setStyleSheet(styleOff)

    def currentMapCanvas(self) -> MapCanvas:
        """
        Returns the MapCanvas that was clicked / used last
        :return: MapCanvas
        """
        if not isinstance(self.mMapWidget, MapWidget):
            return None
        canvases = sorted(self.mMapWidget.mapViewCanvases(self),
                          key=lambda c: c.property(KEY_LAST_CLICKED))
        if len(canvases) == 0:
            return None
        else:
            return canvases[-1]

    def currentLayer(self) -> QgsMapLayer:
        """
        Returns the current map layer, i.e. that selected in the map layer tree view.
        If this is a proxy layer, the MapView will try to return a "real" layer from a MapCanvas


        :return: QgsMapLayer
        """
        cl = self.mLayerTreeView.currentLayer()
        if isinstance(cl, SensorProxyLayer):
            sensor = cl.sensor()
            canvases = [c for c in self.mapCanvases() if c.tsd().sensor() == sensor]
            canvases = sorted(canvases, key=lambda c: c is not self.currentMapCanvas())
            for c in canvases:
                for l in c.layers():
                    if isinstance(l, SensorProxyLayer):
                        return l
        return cl

    def crosshairStyle(self) -> CrosshairStyle:
        """
        Returns the CrosshairStyle
        :return: CrosshairStyle
        """
        return self.mCrossHairStyle

    def setCrosshairVisibility(self, b: bool):
        """
        Enables / diables the map canvas crosshair.
        :param b: bool
        """
        if b != self.actionToggleCrosshairVisibility.isChecked():
            self.actionToggleCrosshairVisibility.setChecked(b)
        else:
            self.mCrossHairStyle.setVisibility(b)
            self.sigCrosshairChanged.emit()

    def sensorProxyLayers(self) -> typing.List[SensorProxyLayer]:
        layers = [n.layer() for n in self.mLayerTreeSensorNode.findLayers()]
        return [l for l in layers if isinstance(l, SensorProxyLayer)]

    def sensorProxyLayer(self, sensor: SensorInstrument) -> SensorProxyLayer:
        """
        Returns the proxy layer related to a SensorInstrument
        :param sensor: SensorInstrument
        :return: SensorLayer
        """
        for l in self.sensorProxyLayers():
            if l.sensor() == sensor:
                return l
        return None

    def sensorLayers(self, sensor: SensorInstrument) -> typing.List[SensorProxyLayer]:
        """
        :param sensor:
        :return:
        """
        layers = []
        for c in self.mapCanvases():
            for l in c.layers():
                if isinstance(l, SensorProxyLayer) and l.sensor() == sensor:
                    layers.append(l)
        return layers

    def sensors(self) -> typing.List[SensorInstrument]:
        """
        Returns a list of SensorsInstruments
        :return: [list-of-SensorInstruments]
        """
        return [t[0] for t in self.mSensorLayerList]

    def addSensor(self, sensor: SensorInstrument):
        """
        Adds a SensorInstrument to be shown in this MapView. Each sensor will be represented as a Raster Layer in the
        Tree Model.
        :param sensor: SensorInstrument
        """
        assert isinstance(sensor, SensorInstrument)
        if sensor not in self.sensors():
            sensor.sigNameChanged.connect(self.sigCanvasAppearanceChanged)

            masterLayer: SensorProxyLayer = sensor.proxyRasterLayer()
            assert isinstance(masterLayer.renderer(), QgsRasterRenderer)

            self.mSensorLayerList.append((sensor, masterLayer))
            masterLayer.styleChanged.connect(lambda *args, v=self, l=masterLayer: self.onMasterStyleChanged(l))
            masterLayer.nameChanged.connect(self.onMasterLyrNameChanged)
            layerTreeLayer: QgsLayerTreeLayer = self.mLayerTreeSensorNode.addLayer(masterLayer)
            layerTreeLayer.setCustomProperty(KEY_LOCKED_LAYER, True)
            layerTreeLayer.setCustomProperty(KEY_SENSOR_LAYER, True)

            dummyLayers = self.mDummyCanvas.layers() + [masterLayer]
            self.mDummyCanvas.setLayers(dummyLayers)

            self.mLayerStyleInitialized[sensor] = False

    def onMasterLyrNameChanged(self, *args):
        lyr = self.sender()
        newname = lyr.name()
        ltn = self.mLayerTreeSensorNode.findLayer(lyr)
        # print(ltn.name())

    def onMasterStyleChanged(self, masterLayer: SensorProxyLayer):

        sensor: SensorInstrument = masterLayer.sensor()
        style: QgsMapLayerStyle = masterLayer.mapLayerStyle()
        # print('### MASTER-STYLE-CHANGED')
        # print(style.xmlData())
        for lyr in self.sensorLayers(sensor):
            lyr.setMapLayerStyle(style)

        for c in self.sensorCanvases(sensor):
            assert isinstance(c, MapCanvas)
            c.addToRefreshPipeLine(MapCanvas.Command.RefreshRenderer)

        self.mLayerStyleInitialized[sensor] = True

    def sensorCanvases(self, sensor: SensorInstrument) -> list:
        """
        Returns the MapCanvases that show a layer with data for the given ``sensor``
        :param sensor: SensorInstrument
        :return:
        """
        assert isinstance(sensor, SensorInstrument)
        return [c for c in self.mapCanvases() if isinstance(c, MapCanvas) and \
                isinstance(c.tsd(), TimeSeriesDate) and c.tsd().sensor() == sensor]

    def sensorLayer(self, sensor: SensorInstrument):
        """
        Returns the QgsRasterLayer that is used a proxy to specify the QgsRasterRenderer for a sensor
        :param sensor: SensorInstrument
        :return: QgsRasterLayer
        """
        assert isinstance(sensor, SensorInstrument)
        for t in self.mSensorLayerList:
            s, l = t
            assert isinstance(s, SensorInstrument)
            assert isinstance(l, QgsRasterLayer)
            if s == sensor:
                return l
        raise Exception('Sensor "{}" not registered to MapView "{}"'.format(sensor.name(), self.title()))

    def removeSensor(self, sensor: SensorInstrument):
        """
        Removes a sensor from this map view
        :param sensor:
        :return:
        """
        if sensor in self.mLayerStyleInitialized.keys():
            self.mLayerStyleInitialized.pop(sensor)

        toRemove = []
        for t in self.mSensorLayerList:
            if t[0] == sensor:
                toRemove.append(t)

        for t in toRemove:
            self.mLayerTreeSensorNode.removeLayer(t[1])
            self.mSensorLayerList.remove(t)

    def hasSensor(self, sensor: SensorInstrument) -> bool:
        """
        :param sensor:
        :return:
        """
        assert isinstance(sensor, SensorInstrument)
        return sensor in self.sensors()


class MapViewLayerTreeViewMenuProvider(QgsLayerTreeViewMenuProvider):

    def __init__(self, mapView, view: QgsLayerTreeView, canvas: QgsMapCanvas):
        super(MapViewLayerTreeViewMenuProvider, self).__init__()
        assert isinstance(view, QgsLayerTreeView)
        assert isinstance(canvas, QgsMapCanvas)
        self.mLayerTreeView: QgsLayerTreeView = view
        self.mDummyCanvas: QgsMapCanvas = canvas
        # self.mDefActions = QgsLayerTreeViewDefaultActions(self.mLayerTreeView)
        self.mMapView: MapView = mapView
        # self.actionAddGroup = self.mDefActions.actionAddGroup()
        # self.actionRename = self.mDefActions.actionRenameGroupOrLayer()
        # self.actionRemove = self.mDefActions.actionRemoveGroupOrLayer()
        # self.actionZoomToLayer = self.mDefActions.actionZoomToGroup(self.mDummyCanvas)
        # self.actionCheckAndAllChildren = self.mDefActions.actionCheckAndAllChildren()
        # self.actionShowFeatureCount = self.mDefActions.actionShowFeatureCount()
        # self.actionZoomToLayer = self.mDefActions.actionZoomToLayer(self.mDummyCanvas)
        # self.actionZoomToSelected = self.mDefActions.actionZoomToSelection(self.mDummyCanvas)
        # self.actionZoomToGroup = self.mDefActions.actionZoomToGroup(self.mDummyCanvas)
        # self.actionAddEOTSVSpectralProfiles = QAction('Add Spectral Profile Layer')
        # self.actionAddEOTSVTemporalProfiles = QAction('Add Temporal Profile Layer')

    def mapView(self) -> MapView:
        return self.mMapView

    def layerTreeView(self) -> QgsLayerTreeView:
        return self.mLayerTreeView

    def layerTree(self) -> QgsLayerTree:
        return self.layerTreeModel().rootGroup()

    def layerTreeModel(self) -> QgsLayerTreeModel:
        return self.layerTreeView().layerTreeModel()

    def onRemoveLayers(self):
        selected = self.layerTreeView().selectedLayers()
        for l in selected:
            if not isinstance(l, SensorProxyLayer):
                self.mapView().mLayerTree.removeLayer(l)

    def onSetCanvasCRS(self):
        s = ""
        lyr = self.layerTreeView()

    def onZoomToLayer(self, layer: QgsMapLayer):
        extent = SpatialExtent.fromLayer(layer)
        if isinstance(extent, SpatialExtent):
            extent = extent.toCrs(self.mapView().mapWidget().crs())
            self.mapView().mapWidget().setSpatialExtent(extent)

    def onZoomActualSize(self):
        current = self.mapView().currentLayer()
        if isinstance(current, QgsRasterLayer):
            s = ""

    def onStretchToExtent(self):
        current = self.mapView().currentLayer()
        canvas = self.mapView().currentMapCanvas()
        if not isinstance(canvas, MapCanvas):
            return
        if isinstance(current, SensorProxyLayer):

            for l in canvas.layers():
                if isinstance(l, SensorProxyLayer) and l.sensor() == current.sensor():
                    canvas.stretchToExtent(layer=current)
                    break

        elif isinstance(current, QgsRasterLayer):
            canvas.stretchToExtent(layer=current)

    def createContextMenu(self) -> QMenu:

        model = self.layerTreeModel()
        ltree = self.layerTree()
        view: QgsLayerTreeView = self.layerTreeView()
        currentGroup = view.currentGroupNode()
        currentLayer = view.currentLayer()
        currentIndex = view.currentIndex()

        currentCanvas = self.mapView().currentMapCanvas()
        isSensorGroup = isinstance(currentGroup, QgsLayerTreeGroup) and currentGroup.customProperty(
            KEY_SENSOR_GROUP) in [True, 'true']
        isSensorLayer = isinstance(currentLayer, SensorProxyLayer)
        mv: MapView = self.mapView()
        mw: MapWidget = mv.mapWidget()
        mw.setCurrentMapView(mv)
        if isSensorLayer:
            # the current layer is an "empty" proxy layer. use one from a visible map canvas instead
            pass

        from eotimeseriesviewer.main import EOTimeSeriesViewer
        eotsv = EOTimeSeriesViewer.instance()
        if not isinstance(eotsv, EOTimeSeriesViewer):
            return
        menu = QMenu(view)
        assert isinstance(mw, MapWidget)
        if isinstance(currentLayer, QgsMapLayer):
            a = menu.addAction('Rename')
            a.triggered.connect(lambda *args, cidx=currentIndex: view.edit(cidx))
            menu.addSeparator()

            # zoom to layer
            menu.addAction(eotsv.actionZoomToLayer())

            # rename layer
            #

            # zoom to native resolution
            # in this case not using a map tool but the current layer
            ref = eotsv.actionZoomActualSize()
            a = menu.addAction(ref.text())
            a.setIcon(ref.icon())
            a.triggered.connect(self.onZoomActualSize)

            if isinstance(currentLayer, QgsRasterLayer):
                a = menu.addAction('&Stretch Using Current Extent')
                a.triggered.connect(self.onStretchToExtent)

            # ----
            menu.addSeparator()
            a = menu.addAction('Add Spectral Library Layer')
            a.triggered.connect(self.mapView().addSpectralProfileLayers)

            a = menu.addAction('Add Temporal Profile Layer')
            a.triggered.connect(self.mapView().addTemporalProfileLayer)

            # ----
            menu.addSeparator()
            # duplicate layer
            # remove layer

            a = menu.addAction('Remove layer')
            a.setToolTip('Remove layer(s)')
            a.triggered.connect(self.onRemoveLayers)

            menu.addSeparator()
            if isinstance(currentLayer, QgsVectorLayer):
                menu.addAction(eotsv.actionOpenTable())
                menu.addAction(eotsv.actionToggleEditing())

            if isinstance(currentLayer, QgsRasterLayer) and not isinstance(currentLayer, SensorProxyLayer):
                pass

            menu.addSeparator()
            # ----------
            # set CRS
            action = menu.addAction('Set layer CRS to map canvas')
            action.triggered.connect(self.onSetCanvasCRS)

            # ----
            # Export...
            # ------
            menu.addSeparator()
            # Styles...
            menu.addAction(eotsv.actionPasteLayerStyle())
            menu.addAction(eotsv.actionCopyLayerStyle())

            # Properties
            menu.addSeparator()
            menu.addAction(eotsv.actionLayerProperties())

        menu.addSeparator()
        return menu

    def vectorLayerTools(self) -> VectorLayerTools:

        from eotimeseriesviewer.main import EOTimeSeriesViewer
        return EOTimeSeriesViewer.instance().mVectorLayerTools

    def showAttributeTable(self, lyr: QgsVectorLayer):

        from eotimeseriesviewer.main import EOTimeSeriesViewer
        tsv = EOTimeSeriesViewer.instance()
        if isinstance(tsv, EOTimeSeriesViewer):
            tsv.showAttributeTable(lyr)
        s = ""

    def onSetLayerProperties(self, lyr: QgsRasterLayer, canvas: QgsMapCanvas):
        if isinstance(canvas, MapCanvas):
            canvas.onSetLayerProperties(lyr)


class MapViewListModel(QAbstractListModel):
    """
    A model to store a list of map views.

    """
    sigMapViewsAdded = pyqtSignal(list)
    sigMapViewsRemoved = pyqtSignal(list)

    def __init__(self, parent=None):
        super(MapViewListModel, self).__init__(parent)
        self.mMapViewList = []

    def addMapView(self, mapView):
        i = len(self.mMapViewList)
        self.insertMapView(i, mapView)

    def insertMapView(self, i, mapView):
        self.insertMapViews(i, [mapView])

    def insertMapViews(self, i, mapViews):
        assert isinstance(mapViews, list)
        assert i >= 0 and i <= len(self.mMapViewList)

        self.beginInsertRows(QModelIndex(), i, i + len(mapViews) - 1)

        for j in range(len(mapViews)):
            mapView = mapViews[j]
            assert isinstance(mapView, MapView)
            mapView.sigTitleChanged.connect(
                lambda: self.doRefresh([mapView])
            )
            self.mMapViewList.insert(i + j, mapView)
        self.endInsertRows()
        self.sigMapViewsAdded.emit(mapViews)

    def doRefresh(self, mapViews: typing.List[MapView]):
        for mapView in mapViews:
            idx = self.mapView2idx(mapView)
            self.dataChanged.emit(idx, idx)

    def removeMapView(self, mapView: MapView):
        self.removeMapViews([mapView])

    def removeMapViews(self, mapViews: typing.List[MapView]):
        assert isinstance(mapViews, list)
        for mv in mapViews:
            assert mv in self.mMapViewList
            idx = self.mapView2idx(mv)
            self.beginRemoveRows(idx.parent(), idx.row(), idx.row())
            self.mMapViewList.remove(mv)
            self.endRemoveRows()
        self.sigMapViewsRemoved.emit(mapViews)

    def rowCount(self, parent=None, *args, **kwargs):
        return len(self.mMapViewList)

    def columnCount(self, QModelIndex_parent=None, *args, **kwargs):
        return 1

    def idx2MapView(self, index):
        if isinstance(index, QModelIndex):
            if index.isValid():
                index = index.row()
            else:
                return None
        assert index >= 0 and index < len(self.mMapViewList)
        return self.mMapViewList[index]

    def mapView2idx(self, mapView):
        assert isinstance(mapView, MapView)
        row = self.mMapViewList.index(mapView)
        return self.createIndex(row, 0, mapView)

    def __len__(self):
        return len(self.mMapViewList)

    def __iter__(self):
        return iter(self.mMapViewList)

    def __getitem__(self, slice):
        return self.mMapViewList[slice]

    def data(self, index, role=Qt.DisplayRole):
        if not index.isValid():
            return None

        if (index.row() >= len(self.mMapViewList)) or (index.row() < 0):
            return None

        mapView = self.idx2MapView(index)
        assert isinstance(mapView, MapView)

        value = None

        if role == Qt.DisplayRole:
            value = '{} {}'.format(index.row() + 1, mapView.title())
        # if role == Qt.DecorationRole:
        # value = classInfo.icon(QSize(20,20))
        if role == Qt.UserRole:
            value = mapView
        return value

def closest_index(tsd_target: TimeSeriesDate, tsds: typing.List[TimeSeriesDate]) -> int:
    """
    Returns the index of the TimeSeriesDate closest to tsd_target
    :param tsd_target:
    :type tsd_target:
    :param tsds:
    :type tsds:
    :return:
    :rtype:
    """
    if len(tsds) == 0:
        return None
    if tsd_target in tsds:
        return tsds.index(tsd_target)
    else:
        for i, tsd2 in enumerate(tsds):
            if tsd2 < tsd_target:
                continue
            else:
                break
        return i


class MapWidget(QFrame):
    """
    This widget contains all maps
    """

    class ViewMode(enum.Enum):

        MapViewByRows = 1,
        MapViewByCols = 2

    sigSpatialExtentChanged = pyqtSignal(SpatialExtent)
    sigCrosshairPositionChanged = pyqtSignal([SpatialPoint], [SpatialPoint, MapCanvas])
    sigCrsChanged = pyqtSignal(QgsCoordinateReferenceSystem)
    sigMapSizeChanged = pyqtSignal(QSize)

    sigMapBackgroundColorChanged = pyqtSignal(QColor)
    sigMapTextColorChanged = pyqtSignal(QColor)
    sigMapTextFormatChanged = pyqtSignal(QgsTextFormat)
    sigMapsPerMapViewChanged = pyqtSignal(int, int)
    sigMapViewsChanged = pyqtSignal()
    sigMapViewAdded = pyqtSignal(MapView)
    sigMapViewRemoved = pyqtSignal(MapView)
    sigCurrentLayerChanged = pyqtSignal(QgsMapLayer)
    # sigCurrentCanvasChanged = pyqtSignal(MapCanvas)
    # sigCurrentMapViewChanged = pyqtSignal(MapView)
    sigCurrentDateChanged = pyqtSignal(TimeSeriesDate)
    sigCurrentLocationChanged = pyqtSignal([QgsCoordinateReferenceSystem, QgsPointXY],
                                           [QgsCoordinateReferenceSystem, QgsPointXY, QgsMapCanvas])
    sigVisibleDatesChanged = pyqtSignal(list)
    sigViewModeChanged = pyqtSignal(ViewMode)

    def __init__(self, *args, **kwds):
        super(MapWidget, self).__init__(*args, **kwds)
        loadUi(DIR_UI / 'mapwidget.ui', self)

        self.setContentsMargins(1, 1, 1, 1)
        self.mGridFrame: QFrame
        self.mGrid: QGridLayout
        assert isinstance(self.mGrid, QGridLayout)

        self.mSyncLock = False
        self.mSyncQGISMapCanvasCenter: bool = False
        self.mLastQGISMapCanvasCenter: SpatialPoint = None
        self.mLastEOTSVMapCanvasCenter: SpatialPoint = None
        self.mMaxNumberOfCachedLayers = 0

        self.mMapLayerStore = QgsMapLayerStore()
        self.mMapLayerCache = dict()
        self.mCanvasCache = dict()

        self.tbSliderDate: QLabel

        # self.mCurrentMapView: MapView = None
        # self.mCurrentMapCanvas: MapCanvas = None

        self.mMapViews: typing.List[MapView] = []
        self.mCanvases: typing.Dict[MapView, typing.List[MapCanvas]] = dict()
        self.mCanvasSignals = dict()
        self.mTimeSeries: TimeSeries = None

        self.mMapToolKey: MapTools = MapTools.Pan

        self.mViewMode = MapWidget.ViewMode.MapViewByRows
        self.mMapViewColumns: int = 3
        self.mMapViewRows: int = 1

        self.mSpatialExtent: SpatialExtent = SpatialExtent.world()
        self.mCrs: QgsCoordinateReferenceSystem = self.mSpatialExtent.crs()
        self.mCrsInitialized: bool = False

        self.mCurrentDate: TimeSeriesDate = None
        self.mCrosshairPosition: SpatialPoint = None

        self.mMapSize = QSize(200, 200)
        from eotimeseriesviewer.settings import defaultValues, Keys

        DEFAULT_VALUES = defaultValues()
        self.mMapTextFormat = DEFAULT_VALUES[Keys.MapTextFormat]
        self.mMapRefreshTimer = QTimer(self)
        self.mMapRefreshTimer.timeout.connect(self.timedRefresh)
        self.mMapRefreshTimer.setInterval(500)
        self.mMapRefreshTimer.start()

        # define shortcuts
        self.actionForward.setShortcuts([QKeySequence(QKeySequence.MoveToNextChar)])
        self.actionBackward.setShortcuts([QKeySequence(QKeySequence.MoveToPreviousChar)])

        self.actionForwardFast.setShortcuts([QKeySequence(QKeySequence.MoveToNextWord),
                                             QKeySequence(Qt.Key_D)])
        self.actionBackwardFast.setShortcuts([QKeySequence(QKeySequence.MoveToPreviousWord),
                                              QKeySequence(Qt.Key_A)])

        self.actionLastDate.setShortcuts([QKeySequence(QKeySequence.MoveToEndOfLine),
                                          QKeySequence('Alt+D')])

        self.actionFirstDate.setShortcuts([QKeySequence(QKeySequence.MoveToStartOfLine),
                                           QKeySequence('Alt+A')])

        self.btnFirst.setDefaultAction(self.actionFirstDate)
        self.btnLast.setDefaultAction(self.actionLastDate)
        self.btnBackward.setDefaultAction(self.actionBackward)
        self.btnForward.setDefaultAction(self.actionForward)
        self.btnBackwardFast.setDefaultAction(self.actionBackwardFast)
        self.btnForwardFast.setDefaultAction(self.actionForwardFast)

        self.actionFirstDate.triggered.connect(self.moveToFirstTSD)
        self.actionLastDate.triggered.connect(self.moveToLastTSD)
        self.actionBackward.triggered.connect(self.moveToPreviousTSD)
        self.actionForward.triggered.connect(self.moveToNextTSD)
        self.actionBackwardFast.triggered.connect(self.moveToPreviousTSDFast)
        self.actionForwardFast.triggered.connect(self.moveToNextTSDFast)

        self.mTimeSlider.setTickInterval(0)
        self.mTimeSlider.setTracking(False)
        self.mTimeSlider.valueChanged.connect(self.onSliderValueChanged)
        self.mTimeSlider.sliderMoved.connect(self.onSliderMoved)

    def clearCanvasGrid(self):
        """
        Cleans the MapCanvas Grid
        :return:
        :rtype:
        """
        assert isinstance(self.mGrid, QGridLayout)
        while self.mGrid.count() > 0:
            item = self.mGrid.takeAt(0)
            widget = item.widget()
            if isinstance(widget, QWidget):
                if isinstance(widget, MapCanvas):
                    self._disconnectCanvasSignals(widget)
                widget.setParent(None)

    def messageBar(self) -> QgsMessageBar:
        """
        Returns the QgsMessageBar
        :return: QgsMessageBar
        """
        return self.mMessageBar

    def refresh(self):
        for c in self.mapCanvases():
            assert isinstance(c, MapCanvas)
            c.timedRefresh()

    def setMapTextFormat(self, textFormat: QgsTextFormat) -> QgsTextFormat:

        if not equalTextFormats(textFormat, self.mMapTextFormat):
            self.mMapTextFormat = textFormat
            for mapView in self.mapViews():
                assert isinstance(mapView, MapView)
                mapView.setMapTextFormat(textFormat)
            self.sigMapTextFormatChanged.emit(self.mapTextFormat())
        return self.mapTextFormat()

    def mapTextFormat(self) -> QgsTextFormat:
        return self.mMapTextFormat

    def setMapTool(self, mapToolKey: MapTools):

        if self.mMapToolKey != mapToolKey:
            self.mMapToolKey = mapToolKey

            for c in self.mapCanvases():
                assert isinstance(c, MapCanvas)
                mts = c.mapTools()
                mts.activate(self.mMapToolKey)

    def visibleTSDs(self) -> typing.List[TimeSeriesDate]:
        """
        Returns the list of currently shown TimeSeriesDates.
        :return: [list-of-TimeSeriesDates]
        """
        for mv in self.mMapViews:
            tsds = []
            for c in self.mCanvases[mv]:
                if isinstance(c.tsd(), TimeSeriesDate):
                    tsds.append(c.tsd())

            return sorted(tsds)
        return []

    def spatialExtent(self) -> SpatialExtent:
        """
        Returns the current SpatialExtent
        :return: SpatialExtent
        """
        return self.mSpatialExtent

    def setSpatialExtent(self, extent: SpatialExtent) -> SpatialExtent:
        """
        Sets a SpatialExtent to all MapCanvases.
        :param extent: SpatialExtent
        :return: SpatialExtent the current SpatialExtent
        """
        if type(extent) == QgsRectangle:
            extent = SpatialExtent(self.crs(), extent)
        try:
            assert isinstance(extent, SpatialExtent), \
                'Expected SpatialExtent, but got {} {}'.format(type(extent), extent)
        except Exception as ex:
            traceback.print_exception(*sys.exc_info())
            raise ex
        if self.mSpatialExtent == extent:
            return

        ext = extent.toCrs(self.crs())
        if not isinstance(ext, SpatialExtent):
            s = ""
            # last resort: zoom to CRS boundaries

        if isinstance(ext, SpatialExtent) and ext != self.spatialExtent():
            self.mSpatialExtent = ext
            for c in self.mapCanvases():
                assert isinstance(c, MapCanvas)
                c.addToRefreshPipeLine(self.mSpatialExtent)
            self.sigSpatialExtentChanged.emit(self.mSpatialExtent.__copy__())
        return self.spatialExtent()

    def setSpatialCenter(self, centerNew: SpatialPoint):
        """
        Sets the spatial center of all MapCanvases
        :param centerNew: SpatialPoint
        """
        assert isinstance(centerNew, SpatialPoint)
        extent = self.spatialExtent()
        if isinstance(extent, SpatialExtent):
            centerOld = extent.center()
            centerNew = centerNew.toCrs(extent.crs())
            if centerNew != centerOld and isinstance(centerNew, SpatialPoint):
                extent = extent.__copy__()
                extent.setCenter(centerNew)
                self.setSpatialExtent(extent)

    def spatialCenter(self) -> SpatialPoint:
        """
        Return the center of all map canvas
        :return: SpatialPoint
        """
        return self.spatialExtent().spatialCenter()

    def setCrs(self, crs: QgsCoordinateReferenceSystem) -> QgsCoordinateReferenceSystem:
        """
        Sets the MapCanvas CRS.
        :param crs: QgsCoordinateReferenceSystem
        :return: QgsCoordinateReferenceSystem
        """
        if self.mCrs == crs:
            return self.crs()

        self.mCrs = QgsCoordinateReferenceSystem(crs)
        for i, c in enumerate(self.mapCanvases()):
            wasBlocked = c.blockSignals(True)
            c.setDestinationCrs(self.mCrs)
            if i == 0:
                self.mSpatialExtent = SpatialExtent.fromMapCanvas(c)
            if not wasBlocked:
                c.blockSignals(False)
        self.sigCrsChanged.emit(self.crs())
        return self.crs()

    def timedRefresh(self):
        """
        Calls the timedRefresh() routine for all MapCanvases
        """
        if self.mSyncQGISMapCanvasCenter:
            self.syncQGISCanvasCenter()

        for c in self.mapCanvases():
            assert isinstance(c, MapCanvas)
            c.timedRefresh()

        for mapView in self.mapViews():
            # test for initial raster stretches
            for sensor in self.timeSeries().sensors():
                if mapView.mLayerStyleInitialized.get(sensor, False) == False:
                    for c in self.mapViewCanvases(mapView):
                        # find the first map canvas that contains  layer data of this sensor
                        # in its extent
                        if not isinstance(c.tsd(), TimeSeriesDate):
                            continue
                        if c.tsd().sensor() == sensor and c.stretchToCurrentExtent():
                            mapView.mLayerStyleInitialized[sensor] = True
                            break

    def currentLayer(self) -> QgsMapLayer:
        mv = self.currentMapView()
        if isinstance(mv, MapView):
            return mv.currentLayer()
        return None

    def currentMapCanvas(self) -> MapCanvas:
        """
        Returns the active map canvas, i.e. the MapCanvas that was clicked last.
        :return: MapCanvas
        """
        canvases = sorted(self.mapCanvases(), key=lambda c: c.property(KEY_LAST_CLICKED), reverse=True)
        if len(canvases) > 0:
            return canvases[0]
        else:
            return None

    def setCurrentMapCanvas(self, mapCanvas: MapCanvas):
        assert isinstance(mapCanvas, MapCanvas)
        canvases = self.mapCanvases()
        assert mapCanvas in canvases
        mapCanvas.setProperty(KEY_LAST_CLICKED, time.time())

    def currentMapView(self) -> MapView:
        """
        Returns the last used map view, i.e. the last map view a canvas was clicked on or a layer was selected in
        :return:
        """
        return self.currentMapCanvas().mapView()

    def setCurrentMapView(self, mapView: MapView):
        assert isinstance(mapView, MapView)
        lastCurrentMapCanvas = self.currentMapCanvas()
        if not isinstance(lastCurrentMapCanvas, MapCanvas):
            return
        lastCurrentMapView = lastCurrentMapCanvas.mapView()

        if mapView != lastCurrentMapView:
            assert mapView in self.mapViews()

            position = 0
            for i, c in enumerate(lastCurrentMapView):
                if c == lastCurrentMapCanvas:
                    position = i
                    break

            canvases = mapView.mapCanvases()
            if len(canvases) > 0:
                position = min(position, len(canvases) - 1)
                self.setCurrentMapCanvas(canvases[position])

    def writeXml(self, node: QDomElement, doc: QDomDocument) -> bool:
        """
        Writes the MapWidget settings to a QDomNode
        :param node:
        :param doc:
        :return:
        """
        context = QgsReadWriteContext()
        mwNode = doc.createElement('MapWidget')
        mapSize = self.mapSize()
        mwNode.setAttribute('mapsPerMapView', f'{self.mapsPerMapView()}')
        mwNode.setAttribute('mapWidth', f'{mapSize.width()}')
        mwNode.setAttribute('mapHeight', f'{mapSize.height()}')
        currentDate = self.currentDate()
        if isinstance(currentDate, TimeSeriesDate):
            mwNode.setAttribute('mapDate', f'{currentDate.date()}')
        crsNode = doc.createElement('MapExtent')
        self.spatialExtent().writeXml(crsNode, doc)
        mwNode.appendChild(crsNode)

        for mapView in self.mapViews():
            mapView.writeXml(mwNode, doc)
        node.appendChild(mwNode)
        return True

    def readXml(self, node: QDomNode):
        from .settings import setValue, Keys
        if not node.nodeName() == 'MapWidget':
            node = node.firstChildElement('MapWidget')
        if node.isNull():
            return None

        if node.hasAttribute('mapsPerMapView'):
            v = node.attribute('mapsPerMapView')
            v = [int(v) for v in re.findall(r'\d+', v)]
            if len(v) >= 2:
                self.setMapsPerMapView(v[0], v[1])
        if node.hasAttribute('mapWidth') and node.hasAttribute('mapHeight'):
            mapSize = QSize(
                int(node.attribute('mapWidth')),
                int(node.attribute('mapHeight'))
            )

            self.setMapSize(mapSize)
            setValue(Keys.MapSize, mapSize)

        if node.hasAttribute('mapDate'):
            dt64 = datetime64(node.attribute('mapDate'))
            if isinstance(dt64, np.datetime64):
                tsd = self.timeSeries().tsd(dt64, None)
                if isinstance(tsd, TimeSeriesDate):
                    self.setCurrentDate(tsd)

        nodeExtent = node.firstChildElement('MapExtent')
        if nodeExtent.nodeName() == 'MapExtent':
            extent = SpatialExtent.readXml(nodeExtent)
            if isinstance(extent, SpatialExtent):
                self.setCrs(extent.crs())
                self.setSpatialExtent(extent)

        mvNode = node.firstChildElement('MapView').toElement()

        while mvNode.nodeName() == 'MapView':
            mapView = MapView.readXml(mvNode)
            if isinstance(mapView, MapView):
                setValue(Keys.MapTextFormat, mapView.mapTextFormat())
                setValue(Keys.MapBackgroundColor, mapView.mapBackgroundColor())

                for s in mapView.sensors():
                    self.timeSeries().addSensor(s)

                self.addMapView(mapView)

            mvNode = mvNode.nextSiblingElement()

    def usedLayers(self) -> typing.List[QgsMapLayer]:
        layers = set()
        for c in self.mapCanvases():
            layers = layers.union(set(c.layers()))
        return list(layers)

    def crs(self) -> QgsCoordinateReferenceSystem:
        return self.mCrs

    def setTimeSeries(self, ts: TimeSeries) -> TimeSeries:
        assert ts is None or isinstance(ts, TimeSeries)

        if isinstance(self.mTimeSeries, TimeSeries):
            self.mTimeSeries.sigVisibilityChanged.disconnect(self._updateCanvasDates)
            self.mTimeSeries.sigTimeSeriesDatesRemoved.disconnect(self._updateCanvasDates)
            self.mTimeSeries.sigTimeSeriesDatesAdded.disconnect(self._updateSliderRange)
            self.mTimeSeries.sigTimeSeriesDatesRemoved.disconnect(self._updateSliderRange)
            self.mTimeSeries.sigFindOverlapTaskFinished.disconnect(self._updateCanvasDates)
            self.mTimeSeries.sigSensorNameChanged.disconnect(self._updateCanvasAppearance)

        self.mTimeSeries = ts
        if isinstance(self.mTimeSeries, TimeSeries):
            self.mTimeSeries.sigVisibilityChanged.connect(self._updateCanvasDates)
            self.mTimeSeries.sigTimeSeriesDatesRemoved.connect(self._updateCanvasDates)
            self.mTimeSeries.sigFindOverlapTaskFinished.connect(self._updateCanvasDates)
            self.mTimeSeries.sigTimeSeriesDatesAdded.connect(self._updateSliderRange)
            self.mTimeSeries.sigTimeSeriesDatesRemoved.connect(self._updateSliderRange)
            self.mTimeSeries.sigSensorNameChanged.connect(self._updateCanvasAppearance)
            if len(self.mTimeSeries) > 0:
                self.mCurrentDate = self.mTimeSeries[0]
            else:
                self.mTimeSeries.sigTimeSeriesDatesAdded.connect(self.onSetInitialCurrentDate)
            self._updateSliderRange()

        return self.timeSeries()

    def onSetInitialCurrentDate(self):
        if len(self.timeSeries()) > 0:
            self.setCurrentDate(self.timeSeries()[0])
            self.mTimeSeries.sigTimeSeriesDatesAdded.disconnect(self.onSetInitialCurrentDate)

    def _updateSliderRange(self):

        slider = self.timeSlider()
        assert isinstance(slider, QSlider)
        n = len(self.timeSeries())
        slider.setRange(0, n-1)
        slider.setEnabled(n > 0)

        if n > 10:
            pageStep = int(n / 100) * 10
            slider.setTickInterval(pageStep)
        else:
            pageStep = 5
            slider.setTickInterval(0)

        slider.setPageStep(pageStep)

        if n > 0:
            tsd = self.currentDate()
            if isinstance(tsd, TimeSeriesDate) and tsd in self.timeSeries():
                i = self.timeSeries()[:].index(tsd)
                slider.setValue(i + 1)
        self._updateSliderDate()
        self._updateSliderCss()

    def _updateSliderCss(self):
        visible_dates = self.visibleTSDs()
        dateS = self.sliderDate()
        # css = self.mTimeSlider.styleSheet()
        px_width = self.mTimeSlider.width()
        n = len(self.timeSeries())
        if self.mTimeSlider.maximum() <= 0 or len(visible_dates) == 0 or not isinstance(dateS, TimeSeriesDate):
            px_start_left = 0
            px_start_right = 0
        else:

            iS = self.timeSeries().mTSDs.index(dateS)
            i0 = self.timeSeries().mTSDs.index(visible_dates[0])
            i1 = self.timeSeries().mTSDs.index(visible_dates[-1])

            px_per_date = px_width / self.mTimeSlider.maximum()
            px_dateS = int(self.mTimeSlider.value() * px_per_date)
            px_start_left = int(i0 * px_per_date)
            px_start_right = px_width - int(i1 *px_per_date)
        # handle_width = 12 if n < 1 else max(12, int(px_width * (len(visible_dates) / n)))
        css = """
               QSlider::groove:horizontal {{
            border: 1px solid #999999;
            height: 8px; /* the groove expands to the size of the slider by default. by giving it a height, it has a fixed size */
           /* background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #B1B1B1, stop:1 #c4c4c4);*/
            /*
            position: absolute;
            left: 10px;
            right: 10px;
          */
            /*width: 25px 100;*/
            margin: 2px 0;
        }}
        
        QSlider::handle:horizontal {{
            background: qlineargradient(x1:0, y1:0, x2:1, y2:1, stop:0 #b4b4b4, stop:1 #8f8f8f);
            border: 1px solid #5c5c5c;    
            width: 24px;
            margin: -2px 0; /* handle is placed by default on the contents rect of the groove. Expand outside the groove */
            border-radius: 3px;
        }}
        
        QSlider::sub-page {{
            border: 1px solid lightgrey;
            border-right: none;
            background: yellow;
            margin: 0px 0 0 {};
        }}
        
        QSlider::add-page {{
            border: 1px solid lightgrey;
            border-left: none;
            background: yellow;
            margin: 0px {} 0 0;
        }}
        """.format(px_start_left, px_start_right)
        self.mTimeSlider.setStyleSheet(css)

    def onSliderMoved(self, value: int):
        self._updateSliderDate(value)

    def _updateSliderDate(self, i=None):
        tsd = self.sliderDate(i)
        if isinstance(tsd, TimeSeriesDate):
            self.tbSliderDate.setText('{}({:03})'.format(tsd.date(), tsd.doy()))
            # self.tbSliderDate.setToolTip(''{}({:03})'.format(tsd.date(), tsd.doy())')

    def onSliderValueChanged(self):
        tsd = self.sliderDate()
        if isinstance(tsd, TimeSeriesDate):
            self.setCurrentDate(tsd)

    def sliderDate(self, i: int = None) -> TimeSeriesDate:
        """
        Returns the TimeSeriesDate related to slider value i
        :param i: slider value
        :return: TimeSeriesDate
        """
        tsd = None
        if i is None:
            i = self.mTimeSlider.value()
        if isinstance(self.mTimeSeries, TimeSeries) and len(self.mTimeSeries) > 0:
            i = min(i, len(self.mTimeSeries) - 1)
            i = max(i, 0)
            tsd = self.mTimeSeries[i]
        return tsd

    def timeSeries(self) -> TimeSeries:
        return self.mTimeSeries

    def setMode(self, mode: ViewMode):

        if mode != self.mViewMode:
            self.mViewMode = mode
            self._updateGrid()
            self.sigViewModeChanged.emit(self.mViewMode)

    def setRowsPerMapView(self, n: int):
        assert n >= 1
        self.mMapViewRows = n

    def rowsPerMapView(self) -> int:
        return self.mMapViewRows

    def setMapsPerMapView(self, cols: int, rows: int) -> int:
        """
        Sets the number of maps per map viewe
        :param n: int
        :return: int, number of maps per map view
        """
        assert cols > 0
        assert rows > 0

        if self.mapsPerMapView() != (cols, rows):
            self.mMapViewColumns = cols
            self.mMapViewRows = rows
            self._updateGrid()
            self.timeSlider().setPageStep(max(1, cols * rows))
            self.sigMapsPerMapViewChanged.emit(self.mMapViewColumns, self.mMapViewRows)
        return self.mapsPerMapView()

    def mapsPerMapView(self) -> typing.Tuple[int, int]:
        """
        Returns the number of maps per map view as tuple of columns x rows
        :return: (int, int)
        """
        return self.mMapViewColumns, self.mMapViewRows

    def setMapSize(self, size: QSize) -> QSize:
        """
        Sets the MapCanvas size
        :param size: QSite
        :return: QSize
        """

        if size != self.mMapSize:
            for canvas in self.mapCanvases():
                canvas.setFixedSize(size)

            self.mMapSize = size
            self._updateWidgetSize()
            self.sigMapSizeChanged.emit(size)

        return self.mMapSize

    def mapSize(self) -> QSize:
        """
        Returns the MapCanvas size
        :return: QSize
        """
        return self.mMapSize

    def mapCanvases(self) -> typing.List[MapCanvas]:
        """
        Returns all MapCanvases
        :return: [list-of-MapCanvases]
        """
        return self.findChildren(MapCanvas)

    def mapViewCanvases(self, mapView: MapView) -> typing.List[MapCanvas]:
        """
        Returns the MapCanvases related to a MapView, sorted in temporal order
        :param mapView: MapView
        :return: [list-of-MapCanvases]
        """
        A = []
        B = []
        for c in self.mCanvases.get(mapView, []):
            if isinstance(c.tsd(), TimeSeriesDate):
                A.append(c)
            else:
                B.append(c)

        return sorted(A, key=lambda c: c.tsd()) + B

    def moveToNextTSD(self):

        for tsd in self.timeSeries()[:]:
            assert isinstance(tsd, TimeSeriesDate)
            if tsd > self.currentDate() and tsd.checkState():
                self.setCurrentDate(tsd)
                return
        s = ""

    def moveToPreviousTSD(self):
        for tsd in reversed(self.timeSeries()[:]):
            if tsd < self.currentDate() and tsd.checkState():
                self.setCurrentDate(tsd)
                return
        s = ""

    def moveToNextTSDFast(self):
        visibleAll = self.timeSeries().visibleTSDs()
        visibleNow = self.visibleTSDs()
        n_maps = self.mMapViewColumns * self.mMapViewRows
        if len(visibleNow) > 0 and len(visibleAll) > 0:
            tsdLast = visibleNow[-1]
            i0 = closest_index(tsdLast, visibleAll)
            i = min(i0 + int(0.5 * n_maps), len(visibleAll)-1)
            self.setCurrentDate(visibleAll[i])

    def moveToPreviousTSDFast(self):
        visibleAll = self.timeSeries().visibleTSDs()
        visibleNow = self.visibleTSDs()
        n_maps = self.mMapViewColumns * self.mMapViewRows
        if len(visibleNow) > 0 and len(visibleAll) > 0:
            tsdFirst = visibleNow[0]
            i0 = closest_index(tsdFirst, visibleAll)
            i = max(0, i0 - int(math.ceil(0.5 * n_maps)))
            self.setCurrentDate(visibleAll[i])

    def moveToFirstTSD(self):
        for tsd in self.timeSeries()[:]:
            if tsd.checkState():
                self.setCurrentDate(tsd)
                return
        s = ""

    def moveToLastTSD(self):
        for tsd in reversed(self.timeSeries()[:]):
            if tsd.checkState():
                self.setCurrentDate(tsd)
                return
        s = ""

    def setCurrentDate(self, tsd: TimeSeriesDate) -> TimeSeriesDate:
        """
        Sets the current TimeSeriesDate, i.e. the "center" date of all dates to be shown
        :param tsd: TimeSeriesDate
        :return: TimeSeriesDate
        """
        assert isinstance(tsd, TimeSeriesDate)

        b = tsd != self.mCurrentDate or (len(self.mapCanvases()) > 0 and self.mapCanvases()[0].tsd() is None)
        self.mCurrentDate = tsd

        if b:
            self._updateCanvasDates()

            i = self.mTimeSeries[:].index(self.mCurrentDate)

            if self.mTimeSlider.value() != i:
                self.mTimeSlider.setValue(i)
            self.sigCurrentDateChanged.emit(self.mCurrentDate)

        if isinstance(self.currentDate(), TimeSeriesDate):
            i = self.timeSeries()[:].index(self.currentDate())
            canForward = i < len(self.mTimeSeries) - 1
            canBackward = i > 0
        else:
            canForward = canBackward = False

        for a in [self.actionForward, self.actionForwardFast, self.actionLastDate]:
            a.setEnabled(canForward)

        for a in [self.actionBackward, self.actionBackwardFast, self.actionFirstDate]:
            a.setEnabled(canBackward)

        self._updateSliderCss()
        # update slider CSS
        # set CSS
        return self.mCurrentDate

    def timeSlider(self) -> QSlider:
        return self.mTimeSlider

    def currentDate(self) -> TimeSeriesDate:
        """
        Returns the current TimeSeriesDate
        :return: TimeSeriesDate
        """
        return self.mCurrentDate

    def addMapView(self, mapView: MapView) -> MapView:
        """
        Adds a MapView
        :param mapView: MapView
        :return: MapView
        """
        assert isinstance(mapView, MapView)
        if mapView not in self.mMapViews:
            self.mMapViews.append(mapView)

            mapView.setMapWidget(self)

            # connect signals
            mapView.sigCanvasAppearanceChanged.connect(self._updateCanvasAppearance)
            mapView.sigCrosshairChanged.connect(self._updateCrosshair)
            mapView.sigCurrentLayerChanged.connect(self.onCurrentMapViewLayerChanged)

            self._updateGrid()
            self._updateCrosshair(mapView=mapView)
            self.sigMapViewsChanged.emit()
            self.sigMapViewAdded.emit(mapView)

            if len(self.mapViews()) == 1:
                self.setCurrentMapView(mapView)

        return mapView

    def onCurrentMapViewLayerChanged(self, layer: QgsMapLayer):
        mapView = self.sender()
        if isinstance(mapView, MapView):
            self.setCurrentMapView(mapView)
        self.sigCurrentLayerChanged.emit(layer)

    def removeMapView(self, mapView: MapView) -> MapView:
        """
        Removes a MapView
        :param mapView: Mapview
        :return: MapView
        """
        if mapView in self.mMapViews:
            self.mMapViews.remove(mapView)
            mapView.setMapWidget(None)
            # disconnect signals

            self._updateGrid()
            self.sigMapViewsChanged.emit()
            self.sigMapViewRemoved.emit(mapView)
        return mapView

    def mapViews(self) -> typing.List[MapView]:
        """
        Returns a list of all MapViews
        :return: [list-of-MapViews]
        """
        return self.mMapViews[:]

    def setSyncWithQGISMapCanvas(self, b: bool):
        assert isinstance(b, bool)
        self.mSyncQGISMapCanvasCenter = b

    def syncQGISCanvasCenter(self):
        if self.mSyncLock:
            return

        iface = qgis.utils.iface
        if not isinstance(iface, QgisInterface):
            return

        c = iface.mapCanvas()
        if not isinstance(c, QgsMapCanvas) or len(self.mapCanvases()) == 0:
            return

        def mapTolerance(canvas: QgsMapCanvas) -> QgsVector:
            m2p = canvas.mapSettings().mapToPixel()
            return m2p.toMapCoordinates(1, 1) - m2p.toMapCoordinates(0, 0)

        recentQGISCenter = SpatialPoint.fromMapCanvasCenter(c)
        recentEOTSVCenter = self.spatialCenter()
        if not (isinstance(recentQGISCenter, SpatialPoint) and isinstance(recentEOTSVCenter, SpatialPoint)):
            return

        if not isinstance(self.mLastQGISMapCanvasCenter, SpatialPoint):
            self.mLastQGISMapCanvasCenter = SpatialPoint.fromMapCanvasCenter(c)
        else:
            self.mLastEOTSVMapCanvasCenter = self.mLastEOTSVMapCanvasCenter.toCrs(c.mapSettings().destinationCrs())
        if not isinstance(self.mLastEOTSVMapCanvasCenter, SpatialPoint):
            self.mLastEOTSVMapCanvasCenter = self.spatialCenter()
        else:
            self.mLastEOTSVMapCanvasCenter = self.mLastEOTSVMapCanvasCenter.toCrs(self.crs())

        if not (isinstance(self.mLastEOTSVMapCanvasCenter, SpatialPoint) and \
                isinstance(self.mLastQGISMapCanvasCenter, SpatialPoint)):
            return

        shiftQGIS = recentQGISCenter - self.mLastQGISMapCanvasCenter
        shiftEOTSV = recentEOTSVCenter - self.mLastEOTSVMapCanvasCenter
        tolQGIS = mapTolerance(c)
        tolEOTS = mapTolerance(self.mapCanvases()[0])

        shiftedQGIS = shiftQGIS.length() > tolQGIS.length()
        shiftedEOTSV = shiftEOTSV.length() > tolEOTS.length()

        if not (shiftedEOTSV or shiftedQGIS):
            return

        self.mSyncLock = True
        if shiftedQGIS:
            # apply change to EOTSV
            self.mLastQGISMapCanvasCenter = recentQGISCenter
            newCenterEOTSV = recentQGISCenter.toCrs(self.crs())
            self.mLastEOTSVMapCanvasCenter = newCenterEOTSV
            if isinstance(newCenterEOTSV, SpatialPoint):
                self.setSpatialCenter(newCenterEOTSV)

        elif shiftedEOTSV:
            # apply change to QGIS
            self.mLastEOTSVMapCanvasCenter = recentEOTSVCenter
            newCenterQGIS = recentEOTSVCenter.toCrs(c.mapSettings().destinationCrs())
            self.mLastQGISMapCanvasCenter = newCenterQGIS
            if isinstance(newCenterQGIS, SpatialPoint):
                c.setCenter(newCenterQGIS)

        self.mSyncLock = False

    def _createMapCanvas(self, parent=None, is_visible: bool = True) -> MapCanvas:
        mapCanvas = MapCanvas(parent=parent)
        mapCanvas.setVisible(is_visible)
        mapCanvas.setMapLayerStore(self.mMapLayerStore)
        mapCanvas.mInfoItem.setTextFormat(self.mapTextFormat())

        # set general canvas properties
        mapCanvas.setFixedSize(self.mMapSize)
        mapCanvas.setDestinationCrs(self.crs())
        mapCanvas.setSpatialExtent(self.spatialExtent())

        # activate the current map tool
        mapTools = mapCanvas.mapTools()
        mapTools.activate(self.mMapToolKey)

        # connect signals
        self._connectCanvasSignals(mapCanvas)
        return mapCanvas

    def _connectCanvasSignals(self, mapCanvas: MapCanvas):
        mapCanvas.sigSpatialExtentChanged.connect(self.setSpatialExtent)
        # mapCanvas.sigDestinationCrsChanged.connect(self.setCrs)
        mapCanvas.sigCrosshairPositionChanged.connect(self.onCrosshairPositionChanged)
        mapCanvas.sigCanvasClicked.connect(self.onCanvasClicked)
        mapCanvas.mapTools().mtCursorLocation.sigLocationRequest.connect(
            lambda crs, pt, c=mapCanvas: self.onCanvasLocationRequest(c, crs, pt))

    def _disconnectCanvasSignals(self, mapCanvas: MapCanvas):
        mapCanvas.sigSpatialExtentChanged.disconnect(self.setSpatialExtent)
        # mapCanvas.sigDestinationCrsChanged.disconnect(self.setCrs)
        mapCanvas.sigCrosshairPositionChanged.disconnect(self.onCrosshairPositionChanged)
        mapCanvas.sigCanvasClicked.disconnect(self.onCanvasClicked)
        # mapCanvas.mapTools().mtCursorLocation.sigLocationRequest.disconnect(
        #    self.sigCurrentLocationChanged)

    def onCanvasLocationRequest(self, canvas: QgsMapCanvas, crs: QgsCoordinateReferenceSystem, pt: QgsPointXY):
        self.sigCurrentLocationChanged[QgsCoordinateReferenceSystem, QgsPointXY].emit(crs, pt)
        self.sigCurrentLocationChanged[QgsCoordinateReferenceSystem, QgsPointXY, QgsMapCanvas].emit(crs, pt, canvas)

    def onCanvasClicked(self, event: QMouseEvent):
        canvas = self.sender()
        if isinstance(canvas, MapCanvas):
            self.setCurrentMapCanvas(canvas)

    def onCrosshairPositionChanged(self, spatialPoint: SpatialPoint):
        canvas = self.sender()

        if self.mCrosshairPosition != spatialPoint:
            self.setCrosshairPosition(spatialPoint)
            self.sigCrosshairPositionChanged[SpatialPoint, MapCanvas].emit(self.mCrosshairPosition, canvas)

    def setCurrentLayer(self, layer: QgsMapLayer):

        for mapView in self.mapViews():
            mapView.setCurrentLayer(layer)

    def setCrosshairPosition(self, spatialPoint) -> SpatialPoint:
        spatialPoint = spatialPoint.toCrs(self.crs())
        if self.mCrosshairPosition != spatialPoint:
            self.mCrosshairPosition = spatialPoint

            for canvas in self.mapCanvases():
                assert isinstance(canvas, MapCanvas)
                canvas.setCrosshairPosition(spatialPoint)

            self.sigCrosshairPositionChanged[SpatialPoint].emit(self.mCrosshairPosition)
        return self.crosshairPosition()

    def crosshairPosition(self) -> SpatialPoint:
        return self.mCrosshairPosition

    def _updateGrid(self):
        self.mMapRefreshTimer.stop()
        for canvas in self.mGrid.findChildren(MapCanvas):
            self._disconnectCanvasSignals(canvas)
        self.clearCanvasGrid()

        nc = self.mMapViewColumns
        nr = len(self.mapViews()) * self.mMapViewRows

        for iMV, mv in enumerate(self.mMapViews):
            assert isinstance(mv, MapView)
            self.mCanvases[mv] = []
            visible = mv.isVisible()
            for row in range(self.mMapViewRows):
                for col in range(self.mMapViewColumns):
                    gridrow = (iMV * self.mMapViewRows) + row
                    gridcol = col

                    c: MapCanvas = self._createMapCanvas(is_visible=visible)
                    assert isinstance(c, MapCanvas)
                    # c.setFixedSize(self.mMapSize)
                    c.setTSD(None)
                    c.setMapView(mv)
                    self.mGrid.addWidget(c, gridrow, gridcol)
                    self.mCanvases[mv].append(c)

        self._updateCanvasDates()
        self._updateSliderCss()
        self.mMapRefreshTimer.start()

    def _updateWidgetSize(self):

        # self.mGrid.update()
        # self.resize(self.sizeHint())
        # self.setMaximumSize(self.sizeHint())
        # self.setFixedSize(self.sizeHint())
        # if False and self.parentWidget():
        if False:
            w = self
            assert isinstance(w, QWidget)

            rect = QGuiApplication.primaryScreen().geometry()

            maxw, maxh = 0.66 * rect.width(), 0.66 * rect.height()
            hint = self.sizeHint()
            minw, minh = min(hint.width(), maxw), min(hint.height(), maxh)

            w.setMinimumSize(minw, minh)
            # w.setFixedSize(self.sizeHint())
            w.layout().update()
            w.update()

    def _updateLayerCache(self) -> typing.List[MapCanvas]:
        canvases = self.findChildren(MapCanvas)
        for c in canvases:
            assert isinstance(c, MapCanvas)
            self.mMapLayerCache[self._layerListKey(c)] = c.layers()
        return canvases

    def _layerListKey(self, canvas: MapCanvas) -> typing.Tuple[MapView, TimeSeriesDate]:
        return (canvas.mapView(), canvas.tsd())

    def _updateCanvasDates(self, updateLayerCache: bool = True):

        visibleBefore = self.visibleTSDs()
        bTSDChanged = False

        if updateLayerCache:
            self._updateLayerCache()

        if not (isinstance(self.mCurrentDate, TimeSeriesDate) and isinstance(self.timeSeries(), TimeSeries)):
            for c in self.findChildren(MapCanvas):
                assert isinstance(c, MapCanvas)
                c.setTSD(None)
            bTSDChanged = True
        else:

            visible = self.timeSeries().visibleTSDs()
            nCanvases = self.mMapViewColumns * self.mMapViewRows

            i_middle = closest_index(self.mCurrentDate, visible)
            i_visible = list(range(len(visible)))
            i_visible = sorted(i_visible, key=lambda i: abs(i-i_middle))
            i_visible = i_visible[0: min(len(i_visible), nCanvases)]

            visible = sorted([visible[i] for i in i_visible])

            # set TSD of remaining canvases to None
            while len(visible) < nCanvases:
                visible.append(None)

            for mapView in self.mapViews():
                for tsd, canvas in zip(visible, self.mCanvases[mapView]):
                    assert isinstance(tsd, TimeSeriesDate) or tsd is None
                    assert isinstance(canvas, MapCanvas)
                    if canvas.tsd() != tsd:
                        canvas.setTSD(tsd)

                        key = self._layerListKey(canvas)
                        if key in self.mMapLayerCache.keys():
                            canvas.setLayers(self.mMapLayerCache.pop(key))
                        bTSDChanged = True

                    # canvas.setLayers()
        if bTSDChanged:
            self._updateCanvasAppearance()

        visible2 = self.visibleTSDs()
        if visible2 != visibleBefore:
            self.sigVisibleDatesChanged.emit(visible2)

        self._freeUnusedMapLayers()

    def _freeUnusedMapLayers(self):

        layers = [l for l in self.mMapLayerStore.mapLayers().values() if isinstance(l, SensorProxyLayer)]
        needed = self.usedLayers()
        toRemove = [l for l in layers if isinstance(l, SensorProxyLayer) and l not in needed]

        # todo: use a kind of caching

        # remove layers from MapLayerCache and MapLayerStore
        for mv in self.mMapLayerCache.keys():
            layers = [l for l in self.mMapLayerCache[mv] if l not in toRemove]
            self.mMapLayerCache[mv] = layers
        self.mMapLayerStore.removeMapLayers(toRemove)

    def _updateCrosshair(self, mapView=None):

        if isinstance(mapView, MapView):
            mapViews = [mapView]
        else:
            mapViews = self.mapViews()

        for mapView in mapViews:
            assert isinstance(mapView, MapView)
            style = mapView.crosshairStyle()
            assert isinstance(style, CrosshairStyle)

            for canvas in self.mCanvases[mapView]:
                assert isinstance(canvas, MapCanvas)

                item = canvas.mCrosshairItem
                item.setVisibility(style.mShow)
                assert isinstance(item, CrosshairMapCanvasItem)
                item.setCrosshairStyle(style)
                # canvas.addToRefreshPipeLine(MapCanvas.Command.UpdateMapItems)

    def _updateCanvasAppearance(self, mapView=None):

        if isinstance(mapView, MapView):
            mapViews = [mapView]
        else:
            mapViews = self.mapViews()

        for mapView in mapViews:
            assert isinstance(mapView, MapView)
            v = mapView.isVisible()
            bg = mapView.mapBackgroundColor()
            tf = mapView.mapTextFormat()

            infoItemVisible: bool = mapView.optionShowInfoExpression.isChecked()
            errorText = ''
            for canvas in self.mCanvases[mapView]:
                assert isinstance(canvas, MapCanvas)

                # set overall visibility
                if canvas.isVisible() != v:
                    canvas.setVisible(v)

                infoItem: MapCanvasInfoItem = canvas.infoItem()
                infoItem.setTextFormat(tf)
                infoItem.setVisible(infoItemVisible)

                expr = QgsExpression(mapView.mapInfoExpression())
                infoItem.setInfoText(None)
                if isinstance(expr, QgsExpression) and expr.expression() != '':
                    # context = QgsExpressionContext([QgsExpressionContextScope(canvas.expressionContextScope())])
                    context: QgsExpressionContext = QgsExpressionContext()
                    context.appendScope(QgsExpressionContextUtils.globalScope())
                    context.appendScope(QgsExpressionContextScope(canvas.expressionContextScope()))

                    if expr.isValid():
                        expr2 = QgsExpression(expr)

                        infoText = expr2.evaluate(context)
                        if not expr2.hasEvalError():
                            # print(infoText)
                            infoItem.setInfoText(str(infoText))
                        else:
                            if errorText == '':
                                errorText = expr2.evalErrorString()
                    else:
                        if errorText == '':
                            errorText = expr.parserErrorString()

                canvas.addToRefreshPipeLine(MapCanvas.Command.UpdateMapItems)
                if canvas.canvasColor() != bg:
                    canvas.addToRefreshPipeLine(mapView.mapBackgroundColor())

            mapView.setInfoExpressionError(errorText)

class MapViewDock(QgsDockWidget):
    sigMapViewAdded = pyqtSignal(MapView)
    sigMapViewRemoved = pyqtSignal(MapView)
    sigShowProfiles = pyqtSignal(SpatialPoint, MapCanvas, str)

    sigMapCanvasColorChanged = pyqtSignal(QColor)
    sigMapCanvasTextFormatChanged = pyqtSignal(QgsTextFormat)
    sigSpatialExtentChanged = pyqtSignal(SpatialExtent)
    sigCrsChanged = pyqtSignal(QgsCoordinateReferenceSystem)
    sigMapSizeChanged = pyqtSignal(QSize)
    sigMapsPerMapViewChanged = pyqtSignal(int, int)
    sigMapTextFormatChanged = pyqtSignal(QgsTextFormat)

    def setTimeSeries(self, timeSeries: TimeSeries):
        assert isinstance(timeSeries, TimeSeries)
        self.mTimeSeries = timeSeries
        self.mTimeSeries.sigSensorAdded.connect(self.addSensor)
        self.mTimeSeries.sigSensorRemoved.connect(self.removeSensor)

    def __init__(self, parent=None):
        super(MapViewDock, self).__init__(parent)
        loadUi(DIR_UI / 'mapviewdock.ui', self)

        self.sbMapViewColumns: QSpinBox
        self.sbMapViewRows: QSpinBox

        self.baseTitle = self.windowTitle()

        self.btnAddMapView.setDefaultAction(self.actionAddMapView)
        self.btnRemoveMapView.setDefaultAction(self.actionRemoveMapView)
        self.btnMutuallyExclusiveMapViews.setDefaultAction(self.optionMutuallyExclusiveMapViews)

        self.actionNextMapView.setShortcuts([QKeySequence(QKeySequence.MoveToNextPage),
                                             QKeySequence(Qt.ALT + Qt.Key_S)])

        self.actionPreviousMapView.setShortcuts([QKeySequence(QKeySequence.MoveToPreviousPage),
                                                 QKeySequence(Qt.ALT + Qt.Key_W)])

        self.actionNextMapView.triggered.connect(self.onNextMapView)
        self.actionPreviousMapView.triggered.connect(self.onPreviousMapView)

        self.btnNextMapView.setDefaultAction(self.actionNextMapView)
        self.btnPreviousMapView.setDefaultAction(self.actionPreviousMapView)

        self.btnCrs: QgsProjectionSelectionWidget
        self.btnCrs.setOptionVisible(QgsProjectionSelectionWidget.LayerCrs, True)
        self.btnCrs.setOptionVisible(QgsProjectionSelectionWidget.ProjectCrs, True)
        self.btnCrs.setOptionVisible(QgsProjectionSelectionWidget.CurrentCrs, True)
        self.btnCrs.setOptionVisible(QgsProjectionSelectionWidget.DefaultCrs, True)
        self.btnCrs.setOptionVisible(QgsProjectionSelectionWidget.RecentCrs, True)
        # self.btnCrs.setOptionVisible(QgsProjectionSelectionWidget.CrsNotSet, True)

        self.btnCrs.crsChanged.connect(self.sigCrsChanged)
        self.btnMapCanvasColor.colorChanged.connect(self.onMapCanvasColorChanged)
        self.onMapCanvasColorChanged(self.btnMapCanvasColor.color())
        self.btnTextFormat.changed.connect(lambda *args: self.sigMapTextFormatChanged.emit(self.mapTextFormat()))
        self.btnApplySizeChanges.clicked.connect(self.onApplyButtonClicked)

        self.actionAddMapView.triggered.connect(self.createMapView)
        self.actionRemoveMapView.triggered.connect(
            lambda: self.removeMapView(self.currentMapView()) if self.currentMapView() else None)



        self.toolBox.currentChanged.connect(self.onToolboxIndexChanged)

        self.spinBoxMapSizeX.valueChanged.connect(lambda: self.onMapSizeChanged('X'))
        self.spinBoxMapSizeY.valueChanged.connect(lambda: self.onMapSizeChanged('Y'))
        self.mLastMapSize = self.mapSize()
        # self.mLastMapViewColumns: int = self.sbMapViewColumns.value()
        # self.mLastMapViewRows: int = self.sbMapViewRows.value()

        self.mTimeSeries = None
        self.mMapWidget = None

    def exclusiveMapViewVisibility(self) -> bool:
        return self.optionMutuallyExclusiveMapViews.isChecked()

    def onNextMapView(self):
        mapViews = self.mapViews()
        if len(mapViews) > 1:
            current = self.currentMapView()
            i = mapViews.index(current) + 1
            if i >= len(mapViews):
                i = 0
            self.setCurrentMapView(mapViews[i])

    def onPreviousMapView(self):
        mapViews = self.mapViews()
        if len(mapViews) > 1:
            current = self.currentMapView()
            i = mapViews.index(current) - 1
            if i < 0:
                i = len(mapViews) - 1
            self.setCurrentMapView(mapViews[i])

    def onMapCanvasColorChanged(self, color: QColor):
        # todo: find a way to display the map canvas color in background
        css = f"QgsFontButton#btnTextFormat{{background-color:{color.name()}; }}"
        self.btnTextFormat.setStyleSheet(css)
        self.sigMapCanvasColorChanged.emit(color)

    def onApplyButtonClicked(self):
        self.sigMapSizeChanged.emit(QSize(self.spinBoxMapSizeX.value(), self.spinBoxMapSizeY.value()))
        self.sigMapsPerMapViewChanged.emit(self.sbMapViewColumns.value(), self.sbMapViewRows.value())

    def setMapWidget(self, mw) -> MapWidget:
        """
        Connects this MapViewDock with a MapWidget
        :param mw: MapWidget
        :return:
        """
        assert isinstance(mw, MapWidget)

        assert mw.timeSeries() == self.mTimeSeries, 'Set the time series first!'
        self.mMapWidget = mw

        self.btnCrs.setCrs(mw.crs())
        self.sigCrsChanged.connect(mw.setCrs)
        mw.sigCrsChanged.connect(self.setCrs)

        self.sigMapSizeChanged.connect(mw.setMapSize)
        mw.sigMapSizeChanged.connect(self.setMapSize)

        self.sigMapTextFormatChanged.connect(mw.setMapTextFormat)
        mw.sigMapTextFormatChanged.connect(self.setMapTextFormat)

        self.sigMapsPerMapViewChanged.connect(mw.setMapsPerMapView)
        mw.sigMapsPerMapViewChanged.connect(self.setMapsPerMapView)

        self.sigMapViewAdded.connect(mw.addMapView)
        self.sigMapViewRemoved.connect(mw.removeMapView)
        mw.sigMapViewAdded.connect(self.addMapView)
        mw.sigMapViewRemoved.connect(self.removeMapView)

        for mapView in mw.mapViews():
            self.addMapView(mapView)

        return self.mMapWidget

    def mapWidget(self) -> MapWidget:
        """
        Returns the connected MapWidget
        :return: MapWidget
        """
        return self.mMapWidget

    def mapViews(self) -> typing.List[MapView]:
        """
        Returns the defined MapViews
        :return: [list-of-MapViews]
        """
        assert isinstance(self.toolBox, QToolBox)
        mapViews = []
        for i in range(self.toolBox.count()):
            item = self.toolBox.widget(i)
            if isinstance(item, MapView):
                mapViews.append(item)
        return mapViews

    def mapCanvases(self) -> list:
        """
        Returns all MapCanvases from all MapViews
        :return: [list-of-MapCanvases]
        """

        maps = []
        for mapView in self.mapViews():
            assert isinstance(mapView, MapView)
            maps.extend(mapView.mapCanvases())
        return maps

    def setCrs(self, crs: QgsCoordinateReferenceSystem):
        if isinstance(crs, QgsCoordinateReferenceSystem):
            old = self.btnCrs.crs()
            if old != crs:
                self.btnCrs.setCrs(crs)
                self.btnCrs.setLayerCrs(crs)

    def setMapsPerMapView(self, cols: int, rows: int):
        assert cols > 0
        assert rows > 0

        if self.sbMapViewColumns.value() != cols:
            self.sbMapViewColumns.setValue(cols)
        if self.sbMapViewRows.value() != rows:
            self.sbMapViewRows.setValue(rows)

    def setMapTextFormat(self, textFormat: QgsTextFormat):
        if isinstance(textFormat, QgsTextFormat):
            if not equalTextFormats(textFormat, self.mapTextFormat()):
                self.btnTextFormat.setTextFormat(textFormat)

    def mapTextFormat(self) -> QgsTextFormat:
        return self.btnTextFormat.textFormat()

    def setMapSize(self, size):
        assert isinstance(size, QSize)
        ws = [self.spinBoxMapSizeX, self.spinBoxMapSizeY]
        oldSize = self.mapSize()
        b = oldSize != size
        for w in ws:
            w.blockSignals(True)

        self.spinBoxMapSizeX.setValue(size.width()),
        self.spinBoxMapSizeY.setValue(size.height())
        self.mLastMapSize = QSize(size)
        for w in ws:
            w.blockSignals(False)
        self.mLastMapSize = QSize(size)
        if b:
            self.sigMapSizeChanged.emit(size)

    def onMapSizeChanged(self, dim):
        newSize = self.mapSize()
        # 1. set size of other dimension accordingly
        if dim is not None:
            if self.checkBoxKeepSubsetAspectRatio.isChecked():
                if dim == 'X':
                    vOld = self.mLastMapSize.width()
                    vNew = newSize.width()
                    targetSpinBox = self.spinBoxMapSizeY
                elif dim == 'Y':
                    vOld = self.mLastMapSize.height()
                    vNew = newSize.height()
                    targetSpinBox = self.spinBoxMapSizeX

                oldState = targetSpinBox.blockSignals(True)
                targetSpinBox.setValue(int(round(float(vNew) / vOld * targetSpinBox.value())))
                targetSpinBox.blockSignals(oldState)
                newSize = self.mapSize()
            if newSize != self.mLastMapSize:
                self.btnApplySizeChanges.setEnabled(True)
        else:
            self.sigMapSizeChanged.emit(self.mapSize())
            self.btnApplySizeChanges.setEnabled(False)
        self.setMapSize(newSize)

    def mapSize(self) -> QSize:
        return QSize(self.spinBoxMapSizeX.value(),
                     self.spinBoxMapSizeY.value())

    def dummySlot(self):
        s = ""

    def onMapViewsRemoved(self, mapViews):

        for mapView in mapViews:
            idx = self.stackedWidget.indexOf(mapView.ui)
            if idx >= 0:
                self.stackedWidget.removeWidget(mapView.ui)
                mapView.ui.close()
            else:
                s = ""

        self.actionRemoveMapView.setEnabled(len(self.mMapViews) > 0)

    def mapBackgroundColor(self) -> QColor:
        """
        Returns the map canvas background color
        :return: QColor
        """
        return self.btnMapCanvasColor.color()

    def setMapBackgroundColor(self, color: QColor):
        """
        Sets the MapCanvas background color
        :param color: QColor
        """
        if color != self.mapBackgroundColor():
            self.btnMapCanvasColor.setColor(color)

    def setMapTextColor(self, color: QColor):
        """
        Sets the map text color
        :param color: QColor
        :return: QColor
        """
        if color != self.mapTextColor():
            self.btnMapTextColor.setColor(color)
        return self.mapTextColor()

    def mapTextColor(self) -> QColor:
        """
        Returns the map text color.
        :return: QColor
        """
        return self.btnMapTextColor.color()

    def onMapViewsAdded(self, mapViews):
        nextShown = None
        for mapView in mapViews:
            mapView.sigTitleChanged.connect(self.updateTitle)
            self.stackedWidget.addWidget(mapView.ui)
            if nextShown is None:
                nextShown = mapView

            contents = mapView.ui.scrollAreaWidgetContents
            size = contents.size()
            hint = contents.sizeHint()
            # mapView.ui.scrollArea.update()
            s = ""
            # setMinimumSize(mapView.ui.scrollAreaWidgetContents.sizeHint())
            # hint = contents.sizeHint()
            # contents.setMinimumSize(hint)
        if isinstance(nextShown, MapView):
            self.setCurrentMapView(nextShown)

        for mapView in mapViews:
            self.sigMapViewAdded.emit(mapView)

    def updateButtons(self, *args):
        b = len(self.mMapViews) > 0
        self.actionRemoveMapView.setEnabled(b)
        self.actionApplyStyles.setEnabled(b)
        self.actionHighlightMapView.setEnabled(b)

    def createMapView(self, name: str = None) -> MapView:
        """
        Create a new MapView
        :return: MapView
        """

        mapView = MapView()

        n = len(self.mapViews()) + 1
        if isinstance(name, str) and len(name) > 0:
            title = name
        else:
            title = 'Map View {}'.format(n)
            while title in [m.title() for m in self.mapViews()]:
                n += 1
                title = 'Map View {}'.format(n)

        if n == 1:
            pass
            # mapView.optionShowDate.setChecked(True)
            # mapView.optionShowSensorName.setChecked(True)

        mapView.setTitle(title)
        mapView.sigShowProfiles.connect(self.sigShowProfiles)
        mapView.setTimeSeries(self.mTimeSeries)
        self.addMapView(mapView)
        return mapView

    def onInfoOptionToggled(self):

        self.sigMapInfoChanged.emit()
        s = ""

    def addMapView(self, mapView: MapView):
        """
        Adds a MapView
        :param mapView: MapView
        """
        assert isinstance(mapView, MapView)
        if mapView not in self:
            mapView.sigTitleChanged.connect(lambda *args, mv=mapView: self.onMapViewUpdated(mv))
            # mapView.sigVisibilityChanged.connect(lambda *args, mv=mapView: self.onMapViewUpdated(mv))
            mapView.sigCanvasAppearanceChanged.connect(lambda *args, mv=mapView: self.onMapViewUpdated(mv))
            self.sigMapCanvasColorChanged.connect(mapView.setMapBackgroundColor)
            self.sigMapCanvasTextFormatChanged.connect(mapView.setMapTextFormat)
            i = self.toolBox.addItem(mapView, mapView.windowIcon(), mapView.title())
            self.toolBox.setCurrentIndex(i)

            self.onMapViewUpdated(mapView)

            if len(self.mapViews()) == 1:
                self.setMapTextFormat(mapView.mapTextFormat())

            self.sigMapViewAdded.emit(mapView)

    def onToolboxIndexChanged(self):

        b = isinstance(self.toolBox.currentWidget(), MapView)
        self.actionRemoveMapView.setEnabled(b)

    def onMapViewUpdated(self, mapView: MapView):
        """
        Handles updates that react on MapView changes
        :param mapView: MapView to make the update for
        """
        numMV = 0
        for i in range(self.toolBox.count()):
            item = self.toolBox.widget(i)
            if isinstance(item, MapView):
                numMV += 1
            if item == mapView:

                if mapView.isVisible():
                    icon = QIcon(":/eotimeseriesviewer/icons/mapview.svg")
                else:
                    icon = QIcon(":/eotimeseriesviewer/icons/mapviewHidden.svg")

                self.toolBox.setItemIcon(i, icon)
                self.toolBox.setItemText(i, 'Map View {} "{}"'.format(numMV, mapView.title()))
                break

    def removeMapView(self, mapView: MapView) -> MapView:
        """
        Removes a MapView
        :param mapView: MapView
        :return: MapView
        """
        if mapView in self.mapViews():
            for i in range(self.toolBox.count()):
                w = self.toolBox.widget(i)
                if isinstance(w, MapView) and w == mapView:
                    self.toolBox.removeItem(i)
                    mapView.close()
                    if self.toolBox.count() >= i:
                        self.toolBox.setCurrentIndex(min(i, self.toolBox.count() - 1))

            self.sigMapViewRemoved.emit(mapView)
        return mapView

    def __len__(self) -> int:
        """
        Returns the number of MapViews
        :return: int
        """
        return len(self.mapViews())

    def __iter__(self):
        """
        Provides an iterator over all MapViews
        :return:
        """
        return iter(self.mapViews())

    def __getitem__(self, slice):
        return self.mapViews()[slice]

    def __contains__(self, mapView):
        return mapView in self.mapViews()

    def index(self, mapView):
        assert isinstance(mapView, MapView)
        return self.mapViews().index(mapView)

    def addSensor(self, sensor: SensorInstrument):
        """
        Adds a new SensorInstrument
        :param sensor: SensorInstrument
        """
        for mapView in self.mapViews():
            mapView.addSensor(sensor)

    def removeSensor(self, sensor: SensorInstrument):
        """
        Removes a Sensor
        :param sensor: SensorInstrument
        """
        for mapView in self.mapViews():
            assert isinstance(mapView, MapView)
            mapView.removeSensor(sensor)

    def applyStyles(self):
        for mapView in self.mMapViews:
            mapView.applyStyles()

    def setCrosshairStyle(self, crosshairStyle):
        for mapView in self.mMapViews:
            mapView.setCrosshairStyle(crosshairStyle)

    def setShowCrosshair(self, b):
        for mapView in self.mMapViews:
            mapView.setCrosshairVisibility(b)

    def index(self, mapView):
        assert isinstance(mapView, MapView)
        return self.mapViewsDefinitions.index(mapView)

    def setCurrentMapView(self, mapView):
        assert isinstance(mapView, MapView) and mapView in self.mapViews()

        if self.exclusiveMapViewVisibility():
            for mv in self.mapViews():
                mv.setVisibility(mv == mapView)
        self.toolBox.setCurrentWidget(mapView)
        self.updateTitle()

    def updateTitle(self, *args):
        # self.btnToggleMapViewVisibility.setChecked(mapView)
        mapView = self.currentMapView()
        if isinstance(mapView, MapView):
            title = '{} | {}'.format(self.baseTitle, mapView.title())
        else:
            title = self.baseTitle
        self.setWindowTitle(title)

    def currentMapView(self) -> MapView:
        w = self.toolBox.currentWidget()
        if isinstance(w, MapView):
            return w
        else:
            # return first map view
            views = self.mapViews()
            if len(views) > 0:
                return views[0]
        return None
