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wxGUI: Skip size event in MapPanelBase.OnSize to let AUI lay out panes - #7941
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wxWidgets 3.3 (wxPython 4.3) changed wxAuiManager to bind its size handler to the managed window instead of pushing itself as an event handler. Bound handlers run newest first and stop at the first one that does not skip the event, so the map panel's own size handler, bound after the manager was created, swallowed the event. The manager never laid out its panes and the map window kept its initial size. Diagnosed with the help of Claude Code.
echoix
approved these changes
Sep 23, 2026
petrasovaa
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backport to 8.5
petrasovaa
enabled auto-merge (squash)
September 23, 2026 14:33
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Problem with newer wxPython (4.3.1):
wxWidgets 3.3 (wxPython 4.3) changed wxAuiManager to bind its size handler to the managed window instead of pushing itself as an event handler. Bound handlers run newest first and stop at the first one that does not skip the event, so the map panel's own size handler, bound after the manager was created, swallowed the event. The manager never laid out its panes and the map window kept its initial size.
Diagnosed with the help of Claude Code.