写一个while循环画ROI的回调函数
时间: 2023-07-28 07:46:28 浏览: 96
自写的回调函数demo
下面是一个使用Halcon在while循环中画ROI的回调函数的示例代码:
```
void roiCallback(Hwindow& window, Hctrl_ROI& roi, Hevent event)
{
static bool roiSelected = false;
switch (event)
{
case EVENT_LEFT_BUTTON_DOWN:
// start drawing ROI
window.SetColor("red");
roi.DrawRectangle1(&window, &row1, &col1, &row2, &col2);
break;
case EVENT_MOUSE_MOVE:
// update ROI during drawing
if (!roiSelected)
{
window.SetColor("red");
window.ClearWindow();
window.DispObj(image);
roi.DrawRectangle1(&window, row1, col1, row2, col2);
}
break;
case EVENT_LEFT_BUTTON_UP:
// finish drawing ROI
roiSelected = true;
roi.SetPart(row1, col1, row2, col2);
roi.SetLineWidth(2);
roi.SetDraw("margin");
window.ClearWindow();
window.DispObj(image);
window.DispObj(roi);
break;
case EVENT_ROI_CHANGED:
// ROI has been changed, update display
if (roiSelected)
{
window.ClearWindow();
window.DispObj(image);
window.DispObj(roi);
}
break;
case EVENT_ROI_DELETED:
// ROI has been deleted, reset flag
roiSelected = false;
break;
}
}
```
在这个回调函数中,我们使用Halcon的Hwindow和Hctrl_ROI类,在while循环中实时绘制ROI。当鼠标左键按下时,我们开始绘制矩形ROI,并在EVENT_MOUSE_MOVE事件中实时更新ROI。当鼠标左键抬起时,我们完成ROI的绘制,并将roiSelected标志设置为true。在EVENT_ROI_CHANGED事件中,我们更新ROI并重新显示。在EVENT_ROI_DELETED事件中,我们将roiSelected标志设置为false。需要注意的是,这只是一个示例代码,实际应用中还需要根据具体需求进行相应的修改。
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