destroyWindow terminates the application when the window is already closed

crackwitz · September 3, 2021, 9:26am

workaround: check the value of cv.getWindowProperty("asdf", cv.WND_PROP_VISIBLE) before trying to destroy

it’s a recent commit:

and this is the git blame of the line that throws the error:

you could make the case that this should not be an error. you could submit an issue on the github about it. or even a pull request!

the documentation should specify this behavior either way (but doesn’t)

github.com

opencv/opencv/blob/5aa7435d2537e677611390b530e31b3b204773a3/modules/highgui/include/opencv2/highgui.hpp#L322

    
      
               without statusbar and toolbar, whereas WINDOW_GUI_EXPANDED is a new enhanced GUI.
          By default, flags == WINDOW_AUTOSIZE | WINDOW_KEEPRATIO | WINDOW_GUI_EXPANDED
          
          
@param winname Name of the window in the window caption that may be used as a window identifier.
          @param flags Flags of the window. The supported flags are: (cv::WindowFlags)
           */
          CV_EXPORTS_W void namedWindow(const String& winname, int flags = WINDOW_AUTOSIZE);
          
          
/** @brief Destroys the specified window.
          
          
The function destroyWindow destroys the window with the given name.
          
          
@param winname Name of the window to be destroyed.
           */
          CV_EXPORTS_W void destroyWindow(const String& winname);
          
          
/** @brief Destroys all of the HighGUI windows.
          
          
The function destroyAllWindows destroys all of the opened HighGUI windows.
           */
          CV_EXPORTS_W void destroyAllWindows();

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destroyWindow terminates the application when the window is already closed

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