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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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5
Applications/Terminal/main.cpp
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@ -98,13 +98,13 @@ RefPtr<GWindow> create_settings_window(TerminalWidget& terminal, RefPtr<CConfigF
auto settings = GWidget::construct();
window->set_main_widget(settings);
settings->set_fill_with_background_color(true);
settings->set_background_role(ColorRole::Button);
settings->set_layout(make<GBoxLayout>(Orientation::Vertical));
settings->layout()->set_margins({ 4, 4, 4, 4 });
auto radio_container = GGroupBox::construct("Bell Mode", settings);
radio_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
radio_container->layout()->set_margins({ 6, 16, 6, 6 });
radio_container->set_fill_with_background_color(true);
radio_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
radio_container->set_preferred_size(100, 70);
@ -119,12 +119,9 @@ RefPtr<GWindow> create_settings_window(TerminalWidget& terminal, RefPtr<CConfigF
auto slider_container = GGroupBox::construct("Background Opacity", settings);
slider_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
slider_container->layout()->set_margins({ 6, 16, 6, 6 });
slider_container->set_fill_with_background_color(true);
slider_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
slider_container->set_preferred_size(100, 50);
auto slider = GSlider::construct(Orientation::Horizontal, slider_container);
slider->set_fill_with_background_color(true);
slider->set_background_color(SystemColor::Window);
slider->on_value_changed = [&terminal, &config](int value) {
terminal.set_opacity(value);