also support mouse events on viewer
also support mouse events on viewer

yuhangwang/pv,biasmv/pv,CyrusBiotechnology/pv,yuhangwang/pv,CyrusBiotechnology/pv,yuhangwang/pv,biasmv/pv,biasmv/pv,CyrusBiotechnology/pv,yuhangwang/pv,CyrusBiotechnology/pv,biasmv/pv