RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 06:48:12 +00:00
Code Issues Activity Actions

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
Download patch file Download diff file Expand all files Collapse all files

35
Applications/PixelPaint/ImageEditor.cpp
View file

@ -51,12 +51,42 @@ void ImageEditor::set_image(RefPtr<Image> image)
m_image->remove_client(*this);
m_image = move(image);
m_history.reset(*m_image);
update();
if (m_image)
m_image->add_client(*this);
}
void ImageEditor::did_complete_action()
{
if (!m_image)
return;
m_history.on_action(*m_image);
}
bool ImageEditor::undo()
{
if (!m_image)
return false;
if (m_history.undo(*m_image)) {
layers_did_change();
return true;
}
return false;
}
bool ImageEditor::redo()
{
if (!m_image)
return false;
if (m_history.redo(*m_image)) {
layers_did_change();
return true;
}
return false;
}
void ImageEditor::paint_event(GUI::PaintEvent& event)
{
GUI::Frame::paint_event(event);
@ -371,4 +401,9 @@ void ImageEditor::image_did_change()
update();
}
void ImageEditor::image_select_layer(Layer* layer)
{
set_active_layer(layer);
}
}