我可以在mfc图片控件中使用鼠标事件吗? [英] Can I use mouse event in mfc picture control?

问题描述

我想在图片控件上裁剪图像.
谢谢.

I would like to crop the image which on picture control.
Thanks in advanced.

推荐答案

可以通过设置PictureControl的窗口区域来实现裁剪.
请通过跟踪LButtonDown和LButtonUp消息来确定要裁剪的区域.
然后设置PictureControl的窗口区域

Cropping can be implemented by setting window region of the PictureControl.
Please identify region for cropping by tracking LButtonDown and LButtonUp messages.
Then set window region of the PictureControl

  CRgn clipregion;
clipregion.CreateRectRgn( left, top,  right, bottom ); // Prepare clip region.
pPictureControl->SetWindowRgn(clipregion, TRUE);

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