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LibDraw+LibGUI: Allow changing individual colors in a Palette

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Palette is now a value wrapper around a NonnullRefPtr<PaletteImpl>.
A new function, set_color(ColorRole, Color) implements a simple
copy-on-write mechanism so that we're sharing the PaletteImpl in the
common case, but allowing you to create custom palettes if you like,
by getting a GWidget's palette, modifying it, and then assigning the
modified palette to the widget via GWidget::set_palette().

Use this to make PaintBrush show its palette colors once again.

Fixes #943.
This commit is contained in:
Andreas Kling 2019-12-29 00:47:49 +01:00
parent 19d4f4c7b5
commit 7b2dd7e116
18 changed files with 98 additions and 40 deletions
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4
Libraries/LibGUI/GWidget.cpp
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@ -67,7 +67,7 @@ const GWidgetClassRegistration* GWidgetClassRegistration::find(const String& cla
GWidget::GWidget(GWidget* parent)
: CObject(parent, true)
, m_font(Font::default_font())
, m_palette(GApplication::the().palette())
, m_palette(GApplication::the().palette().impl())
{
}
@ -695,5 +695,5 @@ Vector<GWidget*> GWidget::child_widgets() const
void GWidget::set_palette(const Palette& palette)
{
m_palette = palette;
m_palette = palette.impl();
}