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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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11
Libraries/LibGUI/GGroupBox.cpp
View file

@ -1,6 +1,7 @@
#include <LibDraw/Palette.h>
#include <LibDraw/StylePainter.h>
#include <LibGUI/GGroupBox.h>
#include <LibGUI/GPainter.h>
#include <LibDraw/StylePainter.h>
GGroupBox::GGroupBox(GWidget* parent)
: GGroupBox({}, parent)
@ -11,8 +12,6 @@ GGroupBox::GGroupBox(const StringView& title, GWidget* parent)
: GWidget(parent)
, m_title(title)
{
set_fill_with_background_color(true);
set_background_color(SystemColor::Window);
}
GGroupBox::~GGroupBox()
@ -28,11 +27,11 @@ void GGroupBox::paint_event(GPaintEvent& event)
0, font().glyph_height() / 2,
width(), height() - font().glyph_height() / 2
};
StylePainter::paint_frame(painter, frame_rect, FrameShape::Box, FrameShadow::Sunken, 2);
StylePainter::paint_frame(painter, frame_rect, palette(), FrameShape::Box, FrameShadow::Sunken, 2);
Rect text_rect { 4, 0, font().width(m_title) + 6, font().glyph_height() };
painter.fill_rect(text_rect, background_color());
painter.draw_text(text_rect, m_title, TextAlignment::Center, foreground_color());
painter.fill_rect(text_rect, palette().button());
painter.draw_text(text_rect, m_title, TextAlignment::Center, palette().button_text());
}
void GGroupBox::set_title(const StringView& title)