@Override
public void undo() throws CannotUndoException {
super.undo();
if (imageEdit != null) {
imageEdit.undo();
}
if (translationEdit != null) {
translationEdit.undo();
}
// it is important to undo the canvas change edit
// after the image and translation edits because
// of the image covers canvas checks
if (canvasChangeEdit != null) {
canvasChangeEdit.undo();
}
if (selectionChangeEdit != null) {
selectionChangeEdit.undo();
}
if (deselectEdit != null) {
deselectEdit.undo();
}
updateGUI();
}