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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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3
Applications/FontEditor/GlyphMapWidget.cpp
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@ -1,4 +1,5 @@
#include "GlyphMapWidget.h"
#include <LibDraw/Palette.h>
#include <LibGUI/GPainter.h>
GlyphMapWidget::GlyphMapWidget(Font& mutable_font, GWidget* parent)
@ -74,7 +75,7 @@ void GlyphMapWidget::paint_event(GPaintEvent& event)
font().max_glyph_width(),
font().glyph_height());
if (glyph == m_selected_glyph) {
painter.fill_rect(outer_rect, SystemColor::Selection);
painter.fill_rect(outer_rect, palette().selection());
painter.draw_glyph(inner_rect.location(), glyph, Color::White);
} else {
painter.draw_glyph(inner_rect.location(), glyph, Color::Black);