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LibGUI+LibDraw: Add "Palette" concept for scoped color theming

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GApplication now has a palette. This palette contains all the system
theme colors by default, and is inherited by a new top-level GWidget.
New child widgets inherit their parents palette.

It is possible to override the GApplication palette, and the palette
of any GWidget.

The Palette object contains a bunch of colors, each corresponding to
a ColorRole. Each role has a convenience getter as well.

Each GWidget now has a background_role() and foreground_role(), which
are then looked up in their current palette when painting. This means
that you no longer alter the background color of a widget by setting
it directly, rather you alter either its background role, or the
widget's palette.
This commit is contained in:
Andreas Kling 2019-12-24 20:57:54 +01:00
parent cb4e51a7a5
commit a79bac428b
62 changed files with 448 additions and 410 deletions
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1
Applications/PaintBrush/PaletteWidget.cpp
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@ -51,7 +51,6 @@ PaletteWidget::PaletteWidget(PaintableWidget& paintable_widget, GWidget* parent)
set_frame_shadow(FrameShadow::Raised);
set_frame_thickness(0);
set_fill_with_background_color(true);
set_background_color(SystemColor::Window);
set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
set_preferred_size(0, 34);