Not well support qt-backend of cv::imshow(). #30

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1. wystephen commented on May 30, 2022

   

   wystephen

   on May 30, 2022

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   In detail, the right button of the mouse and the wheel of mouse are handled by cv::imshow.
2. wpalfi commented on Jun 7, 2022

   

   wpalfi

   on Jun 7, 2022

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   Thank you for reporting, sounds reasonable. I dont have time to look into it. Would you like to provide a fix?
3. wystephen commented on Jul 20, 2022

   

   wystephen

   on Jul 20, 2022

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   I want to make some modifications. But I am not familiar with OpenCV imshow() and your project. Could you give me some hints?
4. wpalfi commented on Jul 20, 2022

   

   wpalfi

   on Jul 20, 2022

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   I have no experience with the qt backend and never used it together with cv-plot. cv-plot's interactive viewer is based on cv::setMouseCallback() and the traditional cv::imshow(). The qt backend supports zooming which interferes with cv-plot's zooming. I guess it may be best to deactivate qt-zooming.
5. wystephen commented on Jul 20, 2022

   

   wystephen

   on Jul 20, 2022

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   But I don't think deactivating qt-zooming is easy to implement without modifying OpenCV Lib.
   Is there any way to handle key press events for each window separately? Using a keyboard may be easier to be implemented.
6. wpalfi commented on Jul 20, 2022

   

   wpalfi

   on Jul 20, 2022

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   Maybe using cv::WINDOW_GUI_NORMAL works?
   Another way could be to use an additional modifier key (ctrl/shift/alt) for cv-plot. You could try to subclass (or replace) CvPlot::Window.