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LibGUI: Only redraw the dirty rect in GWidget.
There is some trouble here with the asynchronous nature of WindowServer and the single per-window backing store we're drawing into. If we start repainting a widget with a pending invalidation, that invalidation might get flushed by the WindowServer mid-paint.
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4 changed files with 10 additions and 8 deletions
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@ -31,7 +31,7 @@ Painter::Painter(GWidget& widget)
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#ifdef DEBUG_WIDGET_UNDERDRAW
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// If the widget is not opaque, let's not mess it up with debugging color.
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if (widget.fillWithBackgroundColor())
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if (widget.fillWithBackgroundColor() && m_window->main_widget() != &widget)
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fill_rect(widget.rect(), Color::Red);
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#endif
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}
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