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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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2
Libraries/LibGUI/GWindowServerConnection.cpp
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@ -1,3 +1,4 @@
#include <LibDraw/Palette.h>
#include <LibDraw/SystemTheme.h>
#include <LibGUI/GAction.h>
#include <LibGUI/GApplication.h>
@ -25,6 +26,7 @@ static void set_system_theme_from_shared_buffer_id(int id)
auto system_theme = SharedBuffer::create_from_shared_buffer_id(id);
ASSERT(system_theme);
set_system_theme(*system_theme);
GApplication::the().set_system_palette(*system_theme);
}
void GWindowServerConnection::handshake()