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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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4
Libraries/LibGUI/GSlider.cpp
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@ -62,8 +62,8 @@ void GSlider::paint_event(GPaintEvent& event)
track_rect.center_horizontally_within(inner_rect());
}
StylePainter::paint_frame(painter, track_rect, FrameShape::Panel, FrameShadow::Sunken, 1);
StylePainter::paint_button(painter, knob_rect(), ButtonStyle::Normal, false, m_knob_hovered);
StylePainter::paint_frame(painter, track_rect, palette(), FrameShape::Panel, FrameShadow::Sunken, 1);
StylePainter::paint_button(painter, knob_rect(), palette(), ButtonStyle::Normal, false, m_knob_hovered);
}
Rect GSlider::knob_rect() const