LibDraw+LibGUI: Allow changing individual colors in a Palette

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.

1 files changed, 1 insertions, 1 deletions

diff --git a/Servers/WindowServer/WSWindowFrame.cpp b/Servers/WindowServer/WSWindowFrame.cpp
index da968a28a1..3fd3ae86d6 100644
--- a/Servers/WindowServer/WSWindowFrame.cpp
+++ b/Servers/WindowServer/WSWindowFrame.cpp
@@ -153,7 +153,7 @@ void WSWindowFrame::paint(Painter& painter)
     if (m_window.type() != WSWindowType::Normal)
         return;
 
-    auto& palette = WSWindowManager::the().palette();
+    auto palette = WSWindowManager::the().palette();
     auto& window = m_window;
 
     auto titlebar_rect = title_bar_rect();