MSW: Fix wxSpinButton background in dark mode (PR #26682)

[Steve Cornett]

On Windows in dark mode, the wxSpinButton incorrectly had a white line between the up and down arrows. This is due to alpha transparency in the bitmap that gets drawn. The fix is to clear the DC to the background colour before drawing the bitmap.

Before:
image.png (view on web)

After:
image.png (view on web)

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You can view, comment on, or merge this pull request online at:

  https://github.com/wxWidgets/wxWidgets/pull/26682

Commit Summary

• fe3ac0d Fix wxSpinButton background in dark mode

File Changes

(1 file)

• M src/msw/spinbutt.cpp (6)

Patch Links:

• https://github.com/wxWidgets/wxWidgets/pull/26682.patch
• https://github.com/wxWidgets/wxWidgets/pull/26682.diff

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