实现View 视图的Zoom in/out

实现View 视图的Zoom in/out-achieve View View Zoom in/out

MainFrm.cpp
MainFrm.h
QBufferDC.cpp
QBufferDC.h
QSelectTracker.cpp
QSelectTracker.h
QTracker.cpp
QTracker.h
QZoomView.cpp
QZoomView.h
QZoomViewDemo.cpp
QZoomViewDemo.dsp
QZoomViewDemo.dsw
QZoomViewDemo.exe
QZoomViewDemo.h
QZoomViewDemo.rc
QZoomViewDemo.sln
QZoomViewDemo.suo
QZoomViewDemo.vcproj
QZVDemoDoc.cpp
QZVDemoDoc.h
QZVDemoView.cpp
QZVDemoView.h
res
FACE02.ICO
grip_closed.cur
grip_open.cur
loupe.cur
loupe_minus.cur
loupe_plus.cur
QZoomViewDemo.ico
QZoomViewDemo.manifest
QZoomViewDemo.rc2
QZoomViewDemoDoc.ico
QZVDemoDoc.ico
Toolbar.bmp
Resource.h
StdAfx.cpp
StdAfx.h