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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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10
Applications/PixelPaint/Layer.cpp
View file

@ -52,6 +52,16 @@ RefPtr<Layer> Layer::create_with_bitmap(Image& image, const Gfx::Bitmap& bitmap,
return adopt(*new Layer(image, bitmap, name));
}
RefPtr<Layer> Layer::create_snapshot(Image& image, const Layer& layer)
{
auto snapshot = create_with_bitmap(image, *layer.bitmap().clone(), layer.name());
snapshot->set_opacity_percent(layer.opacity_percent());
snapshot->set_visible(layer.is_visible());
snapshot->set_selected(layer.is_selected());
snapshot->set_location(layer.location());
return snapshot;
}
Layer::Layer(Image& image, const Gfx::IntSize& size, const String& name)
: m_image(image)
, m_name(name)