- Support QGIS 4.x / Qt6 (scoped enums, sizeInBytes, PyQt6-safe code)
- Polygons are now traced by flood fill from the clicked point
(connected component), replacing the whole-canvas scan and the Single
Mode checkbox
- Colors are compared perceptually in CIELAB (delta-E) instead of RGB
distance
- The selection grows over smooth color gradients (region growing)
while sharp edges stop it
- Remove the Accuracy slider; analysis resolution is now chosen
automatically (full resolution, downscaled only on very large
canvases)
- Clicking now shows a tentative polygon with a confirmation dialog:
adjust the Color Threshold while watching the result, then confirm to
save (polygons are no longer created immediately on click)
- Fix runaway selection at loose Color Threshold: the gradient-growing
edge tolerance is now a small fixed value instead of scaling with the
slider, and the growth cap is tightened
- The reference color is refined from region statistics: it starts as
the median of a small patch around the click and is re-anchored once
to the selected region's median color, so the result no longer depends
on the exact pixel that was clicked
- Rescale the Color Threshold: the slider now maps geometrically to
delta-E 1-12 (the old strictest setting sits at the middle),
compensating for the extra reach the refinement and gradient growing
added
- Add a 1 click mode toggle to save polygons immediately on click,
bypassing the confirmation dialog
- Tidy up the dock widget: the stateless Enable button is now "Start
Magic Wand", the output layer combo has a label, and a newly created
layer stays selected as the target of subsequent clicks
- Replace Douglas-Peucker vertex thinning with area-based
Visvalingam-Whyatt simplification: pixel staircases collapse cleanly
while real corners are preserved (Douglas-Peucker used to clip corners
near the ring start)
- Polygons are added through the layer's edit session, one undo
command per click: press Ctrl+Z to undo a creation (edits stay
uncommitted until you save the layer)
- While the confirmation dialog is open, every further map click adds
a seed point to the same selection; the dialog stays on top and the
rest of the UI stays usable
- Multi-point selections combine all seed colors into one color model:
a pixel matches when it is close to the nearest seed color and
connected to any of the points (multi-source flood fill)
- Add a processing algorithm "Polygonize by seed points"
(magicwand:polygonizebyseeds): magic-wand selection on any RGB raster
with a seed point layer, usable in models, batch runs and
qgis_process; combine with "Convert map to raster" to reproduce the
interactive behavior. One seed feature = one selection = one
multipolygon output; all points of a multipoint feature contribute to
the same selection, like clicking multiple points in the interactive
preview
- Load toolbar icon from file and drop compiled Qt resources
- Build the dock widget UI in Python instead of a Designer .ui file
- Use native: processing algorithms instead of deprecated qgis: ones
- Show only polygon layers as output targets in the layer selector
- Fix duplicated signal connections when reopening the dock widget
- Restore the previous map tool when the dock widget is closed
- Clean up dock widget and signal connections on plugin unload
- Require QGIS 3.44+ and modernize the code base (type hints etc.)
- Add unit tests and CI (lint / test on QGIS 3.44 and 4.0 / release)

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