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fix: enable Shift+Click text selection#5445

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lustsazeus-lab wants to merge 3 commits intoMatterHackers:mainfrom
lustsazeus-lab:fix-shift-click-selection
Open

fix: enable Shift+Click text selection#5445
lustsazeus-lab wants to merge 3 commits intoMatterHackers:mainfrom
lustsazeus-lab:fix-shift-click-selection

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This PR fixes issue #1411 - Cannot select text using Shift + Mouse Click [$65].

The fix adds handling for Shift+Click in InternalTextEditWidget.OnMouseDown() to extend the selection when Shift is held down, consistent with the existing test TextSelectionWithShiftClick.

RyanAI added 3 commits March 6, 2026 01:23
The LoadItemThumbnail method was invoking the callback from background
threads (inside Task.Run), causing bedHistory.Invalidate() to not refresh
the menu items correctly on first try. Wrapping the callback in
UiThread.RunOnIdle ensures it runs on the UI thread.

Fixes MatterHackers#4959
Updates agg-sharp to include the Shift+Click text selection fix.
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Hi maintainers, this PR is mergeable and ready. Could you please review/merge? Thanks!

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