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Constrain selection so it doesn't go completely outside the document bounds

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This commit is contained in:
Isaiah Odhner 2023-04-23 00:10:06 -04:00
parent cb0db3b6e6
commit dbce1434cd
1 changed files with 5 additions and 0 deletions
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5
paint.py
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@ -2063,6 +2063,11 @@ class PaintApp(App[None]):
self.selection_drag_offset.x + event.mouse_move_event.x,
self.selection_drag_offset.y + event.mouse_move_event.y,
)
# constrain to have at least one cell in the bounds of the document
offset = (
max(1-sel.region.width, min(self.image.width - 1, offset[0])),
max(1-sel.region.height, min(self.image.height - 1, offset[1])),
)
old_region = sel.region
sel.region = Region.from_offset(offset, sel.region.size)
combined_region = old_region.union(sel.region)