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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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9
Libraries/LibGUI/GToolBar.cpp
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@ -1,3 +1,4 @@
#include <LibDraw/Palette.h>
#include <LibGUI/GAction.h>
#include <LibGUI/GActionGroup.h>
#include <LibGUI/GBoxLayout.h>
@ -71,8 +72,8 @@ public:
GPainter painter(*this);
painter.add_clip_rect(event.rect());
painter.translate(rect().center().x() - 1, 0);
painter.draw_line({ 0, 0 }, { 0, rect().bottom() }, SystemColor::ThreedShadow1);
painter.draw_line({ 1, 0 }, { 1, rect().bottom() }, SystemColor::ThreedHighlight);
painter.draw_line({ 0, 0 }, { 0, rect().bottom() }, palette().threed_shadow1());
painter.draw_line({ 1, 0 }, { 1, rect().bottom() }, palette().threed_highlight());
}
};
@ -90,7 +91,7 @@ void GToolBar::paint_event(GPaintEvent& event)
painter.add_clip_rect(event.rect());
if (m_has_frame)
StylePainter::paint_surface(painter, rect(), x() != 0, y() != 0);
StylePainter::paint_surface(painter, rect(), palette(), x() != 0, y() != 0);
else
painter.fill_rect(event.rect(), background_color());
painter.fill_rect(event.rect(), palette().button());
}