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PixelPaint: Undo and redo actions

Browse source 
The most used feature of any image editor, undo. Each tool now
notifies the ImageEditor that they completed an action, where
it'll take a snapshot if its current state.

For now, a snapshot is just a copy of the whole image and its
layers. There's a hard limit on the amount of actions it stores.
This commit is contained in:
BenJilks 2020-10-17 16:47:34 +00:00 • committed by Andreas Kling
parent 5aeab9878e
commit 1c27568ab0
21 changed files with 256 additions and 2 deletions
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Applications/PixelPaint/MoveTool.cpp
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@ -70,6 +70,7 @@ void MoveTool::on_mouseup(Layer&, GUI::MouseEvent& event, GUI::MouseEvent&)
return;
m_layer_being_moved = nullptr;
m_editor->window()->set_cursor(Gfx::StandardCursor::None);
m_editor->did_complete_action();
}
void MoveTool::on_keydown(GUI::KeyEvent& event)