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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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51
Libraries/LibDraw/Palette.h Normal file
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#pragma once
#include <AK/Badge.h>
#include <LibDraw/SystemTheme.h>
class GApplication;
class Palette : public RefCounted<Palette> {
public:
static NonnullRefPtr<Palette> create_with_shared_buffer(SharedBuffer&);
~Palette();
Color window() const { return color(ColorRole::Window); }
Color window_text() const { return color(ColorRole::WindowText); }
Color selection() const { return color(ColorRole::Selection); }
Color selection_text() const { return color(ColorRole::SelectionText); }
Color desktop_background() const { return color(ColorRole::DesktopBackground); }
Color active_window_border1() const { return color(ColorRole::ActiveWindowBorder1); }
Color active_window_border2() const { return color(ColorRole::ActiveWindowBorder2); }
Color active_window_title() const { return color(ColorRole::ActiveWindowTitle); }
Color inactive_window_border1() const { return color(ColorRole::InactiveWindowBorder1); }
Color inactive_window_border2() const { return color(ColorRole::InactiveWindowBorder2); }
Color inactive_window_title() const { return color(ColorRole::InactiveWindowTitle); }
Color moving_window_border1() const { return color(ColorRole::MovingWindowBorder1); }
Color moving_window_border2() const { return color(ColorRole::MovingWindowBorder2); }
Color moving_window_title() const { return color(ColorRole::MovingWindowTitle); }
Color highlight_window_border1() const { return color(ColorRole::HighlightWindowBorder1); }
Color highlight_window_border2() const { return color(ColorRole::HighlightWindowBorder2); }
Color highlight_window_title() const { return color(ColorRole::HighlightWindowTitle); }
Color menu_stripe() const { return color(ColorRole::MenuStripe); }
Color menu_base() const { return color(ColorRole::MenuBase); }
Color menu_selection() const { return color(ColorRole::MenuSelection); }
Color base() const { return color(ColorRole::Base); }
Color button() const { return color(ColorRole::Button); }
Color button_text() const { return color(ColorRole::ButtonText); }
Color threed_highlight() const { return color(ColorRole::ThreedHighlight); }
Color threed_shadow1() const { return color(ColorRole::ThreedShadow1); }
Color threed_shadow2() const { return color(ColorRole::ThreedShadow2); }
Color hover_highlight() const { return color(ColorRole::ThreedHighlight); }
Color color(ColorRole) const;
const SystemTheme& theme() const;
void replace_internal_buffer(Badge<GApplication>, SharedBuffer& buffer) { m_theme_buffer = buffer; }
private:
explicit Palette(SharedBuffer&);
RefPtr<SharedBuffer> m_theme_buffer;
};