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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
Libraries/LibGUI/GAbstractButton.cpp
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@ -1,3 +1,4 @@
#include <LibDraw/Palette.h>
#include <LibGUI/GAbstractButton.h>
#include <LibGUI/GPainter.h>
@ -154,7 +155,7 @@ void GAbstractButton::paint_text(GPainter& painter, const Rect& rect, const Font
if (text().is_empty())
return;
painter.draw_text(clipped_rect, text(), font, text_alignment, SystemColor::ButtonText, TextElision::Right);
painter.draw_text(clipped_rect, text(), font, text_alignment, palette().button_text(), TextElision::Right);
if (is_focused())
painter.draw_rect(clipped_rect.inflated(6, 4), Color(140, 140, 140));
}