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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/GApplication.cpp
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@ -147,7 +147,7 @@ void GApplication::did_delete_last_window(Badge<GWindow>)
void GApplication::set_system_palette(SharedBuffer& buffer)
{
if (!m_system_palette)
m_system_palette = Palette::create_with_shared_buffer(buffer);
m_system_palette = PaletteImpl::create_with_shared_buffer(buffer);
else
m_system_palette->replace_internal_buffer({}, buffer);
@ -157,5 +157,5 @@ void GApplication::set_system_palette(SharedBuffer& buffer)
void GApplication::set_palette(const Palette& palette)
{
m_palette = palette;
m_palette = palette.impl();
}