_gsBack _gsFront _lastCenter _lastScale _mgview _view _zoomEnabled _zooming _zoomTimes checkZoomTimes cmdView copyGs deviceView draw dyndraw frontGraph GcBaseView graph isZoomEnabled isZooming onGesture onSize setZoomEnabled submitBackXform twoFingersMove xform ~GcBaseView

xform() GiTransform* GcBaseView::xform ( ) 得到后端坐标系对象 函数调用图: 这是这个函数的调用关系图: