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LibGUI+LibDraw: Add "Palette" concept for scoped color theming

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

View file

@ -44,6 +44,7 @@ bool WSMenuManager::is_open(const WSMenu& menu) const
void WSMenuManager::draw()
{
auto& wm = WSWindowManager::the();
auto& palette = wm.palette();
auto menubar_rect = this->menubar_rect();
if (m_needs_window_resize) {
@ -83,14 +84,14 @@ void WSMenuManager::draw()
Painter painter(*window().backing_store());
painter.fill_rect(menubar_rect, SystemColor::Window);
painter.draw_line({ 0, menubar_rect.bottom() }, { menubar_rect.right(), menubar_rect.bottom() }, SystemColor::ThreedShadow1);
painter.fill_rect(menubar_rect, palette.window());
painter.draw_line({ 0, menubar_rect.bottom() }, { menubar_rect.right(), menubar_rect.bottom() }, palette.threed_shadow1());
int index = 0;
wm.for_each_active_menubar_menu([&](WSMenu& menu) {
Color text_color = SystemColor::WindowText;
Color text_color = palette.window_text();
if (is_open(menu)) {
painter.fill_rect(menu.rect_in_menubar(), SystemColor::MenuSelection);
painter.draw_rect(menu.rect_in_menubar(), Color(SystemColor::MenuSelection).darkened());
painter.fill_rect(menu.rect_in_menubar(), palette.menu_selection());
painter.draw_rect(menu.rect_in_menubar(), palette.menu_selection().darkened());
text_color = Color::White;
}
painter.draw_text(
@ -103,7 +104,7 @@ void WSMenuManager::draw()
return IterationDecision::Continue;
});
painter.draw_text(m_username_rect, m_username, Font::default_bold_font(), TextAlignment::CenterRight, SystemColor::WindowText);
painter.draw_text(m_username_rect, m_username, Font::default_bold_font(), TextAlignment::CenterRight, palette.window_text());
time_t now = time(nullptr);
auto* tm = localtime(&now);
@ -115,7 +116,7 @@ void WSMenuManager::draw()
tm->tm_min,
tm->tm_sec);
painter.draw_text(m_time_rect, time_text, wm.font(), TextAlignment::CenterRight, SystemColor::WindowText);
painter.draw_text(m_time_rect, time_text, wm.font(), TextAlignment::CenterRight, palette.window_text());
for (auto& applet : m_applets) {
if (!applet)