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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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7
Applications/PixelPaint/EraseTool.cpp
View file

@ -72,6 +72,13 @@ void EraseTool::on_mousemove(Layer& layer, GUI::MouseEvent& event, GUI::MouseEve
}
}
void EraseTool::on_mouseup(Layer&, GUI::MouseEvent& event, GUI::MouseEvent&)
{
if (event.button() != GUI::MouseButton::Left && event.button() != GUI::MouseButton::Right)
return;
m_editor->did_complete_action();
}
void EraseTool::on_tool_button_contextmenu(GUI::ContextMenuEvent& event)
{
if (!m_context_menu) {