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

onZoomChanged:() - (void GiPaintViewDelegate) onZoomChanged: (id)  view optional 视图放缩的通知