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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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10
Libraries/LibGUI/GApplication.h
View file

@ -10,7 +10,10 @@ class GAction;
class GKeyEvent;
class GMenuBar;
class GWindow;
class GWindowServerConnection;
class Palette;
class Point;
class SharedBuffer;
class GApplication {
public:
@ -39,9 +42,16 @@ public:
const String& invoked_as() const { return m_invoked_as; }
const Vector<String>& args() const { return m_args; }
const Palette& palette() const { return *m_palette; }
void set_palette(const Palette&);
void set_system_palette(SharedBuffer&);
private:
OwnPtr<CEventLoop> m_event_loop;
OwnPtr<GMenuBar> m_menubar;
RefPtr<Palette> m_palette;
RefPtr<Palette> m_system_palette;
HashMap<GShortcut, GAction*> m_global_shortcut_actions;
class TooltipWindow;
TooltipWindow* m_tooltip_window { nullptr };