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displayOverlay doesn't disappear after timeout#27082

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asmorkalov merged 2 commits intoopencv:4.xfrom
huiyu-mcse:fix_bug
Mar 17, 2025
Merged

displayOverlay doesn't disappear after timeout#27082
asmorkalov merged 2 commits intoopencv:4.xfrom
huiyu-mcse:fix_bug

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@huiyu-mcse huiyu-mcse commented Mar 17, 2025 •
edited by asmorkalov
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Fixes #26555

Expected Behaviour

An overlay should be displayed atop an image and then disappear after delayms has timed out, but it doesn't. Also, displayStatusBar doesn't appear to set any text on the window.

Actual Behaviour

The overlay appears but doesn't disappear unless a mouse move event happens on the image.

Changes

  • Fixed the issue with displayOverlay not disappearing after the timeout.

Checklist

  • I agree to contribute to the project under Apache 2 License.
  • To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV.
  • The PR is proposed to the proper branch.
  • There is a reference to the original bug report and related work.
  • There is accuracy test, performance test, and test data in the opencv_extra repository, if applicable.
  • The feature is well documented, and sample code can be built with the project CMake.

@huiyu-mcse
Fix opencv#26555: displayOverlay doesn't disappear after timeout
fff880f 
Expected behaviour:
an overlay should be displayed atop an image and then
disappear after delayms has timed out but doesn't.
Also, displayStatusBar doesn't appear to
set any text on the window.
Actual:
the overlay appears but doesn't disappear unless
a mouse move event happens on the image.
@asmorkalov asmorkalov changed the title Fix #26555: displayOverlay doesn't disappear after timeout displayOverlay doesn't disappear after timeout Mar 17, 2025
@asmorkalov asmorkalov added the bug label Mar 17, 2025
asmorkalov
asmorkalov requested changes Mar 17, 2025
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@asmorkalov asmorkalov self-assigned this Mar 17, 2025
@asmorkalov asmorkalov added this to the 4.12.0 milestone Mar 17, 2025
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asmorkalov commented Mar 17, 2025

The cvUpdateWindow designed for OpenGL integration:

CV_IMPL void cvUpdateWindow(const char*)
{
    CV_Error(cv::Error::OpenGlNotSupported, "The library is compiled without OpenGL support");
}

I got the error in my build without OpenGL support.

@asmorkalov asmorkalov merged commit 855f20f into opencv:4.x Mar 17, 2025
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@asmorkalov asmorkalov mentioned this pull request Apr 29, 2025
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@asmorkalov asmorkalov asmorkalov approved these changes

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bug category: highgui-gui

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4.12.0

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python binding: displayOverlay doesn't disappear from the display unless a mouse move event happens over the image

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