onCommandChanged: onContentChanged: onDynamicChanged: onDynDrawEnded: onFirstRegen: onGestureBegan: onGestureEnded: onGestureShouldBegin: onResizeFrame: onSelectionChanged: onShapeClicked: onShapeDblClick: onShapeDeleted: onShapesRecorded: onShapeWillDelete: onZoomChanged:

onCommandChanged:() - (void GiPaintViewDelegate) onCommandChanged: (id)  view optional 当前命令改变的通知