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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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19
Servers/WindowServer/WSWindowSwitcher.cpp
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@ -70,9 +70,10 @@ void WSWindowSwitcher::on_key_event(const WSKeyEvent& event)
void WSWindowSwitcher::draw()
{
auto& palette = WSWindowManager::the().palette();
Painter painter(*m_switcher_window->backing_store());
painter.fill_rect({ {}, m_rect.size() }, SystemColor::Window);
painter.draw_rect({ {}, m_rect.size() }, SystemColor::ThreedShadow2);
painter.fill_rect({ {}, m_rect.size() }, palette.window());
painter.draw_rect({ {}, m_rect.size() }, palette.threed_shadow2());
for (int index = 0; index < m_windows.size(); ++index) {
auto& window = *m_windows.at(index);
Rect item_rect {
@ -84,21 +85,21 @@ void WSWindowSwitcher::draw()
Color text_color;
Color rect_text_color;
if (index == m_selected_index) {
painter.fill_rect(item_rect, SystemColor::Selection);
text_color = SystemColor::SelectionText;
rect_text_color = SystemColor::ThreedShadow1;
painter.fill_rect(item_rect, palette.selection());
text_color = palette.selection_text();
rect_text_color = palette.threed_shadow1();
} else {
text_color = SystemColor::WindowText;
rect_text_color = SystemColor::ThreedShadow2;
text_color = palette.window_text();
rect_text_color = palette.threed_shadow2();
}
item_rect.shrink(item_padding(), 0);
Rect thumbnail_rect = { item_rect.location().translated(0, 5), { thumbnail_width(), thumbnail_height() } };
if (window.backing_store()) {
painter.draw_scaled_bitmap(thumbnail_rect, *window.backing_store(), window.backing_store()->rect());
StylePainter::paint_frame(painter, thumbnail_rect.inflated(4, 4), FrameShape::Container, FrameShadow::Sunken, 2);
StylePainter::paint_frame(painter, thumbnail_rect.inflated(4, 4), palette, FrameShape::Container, FrameShadow::Sunken, 2);
}
Rect icon_rect = { thumbnail_rect.bottom_right().translated(-window.icon().width(), -window.icon().height()), { window.icon().width(), window.icon().height() } };
painter.fill_rect(icon_rect, SystemColor::Window);
painter.fill_rect(icon_rect, palette.window());
painter.blit(icon_rect.location(), window.icon(), window.icon().rect());
painter.draw_text(item_rect.translated(thumbnail_width() + 12, 0), window.title(), WSWindowManager::the().window_title_font(), TextAlignment::CenterLeft, text_color);
painter.draw_text(item_rect, window.rect().to_string(), TextAlignment::CenterRight, rect_text_color);