[Viewer] Display error labels when an image cannot be loaded #2250
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Based on QtAliceVision's global status for the FloatImageViewer, display a specific label when an error has been encountered. The content of the label depends on the type of the error.
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fabiencastan
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Dec 19, 2023
This was referenced Dec 20, 2023
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Description
When an image cannot be loaded in the 2D Viewer, for example when visualizing the output of a node while an image whose viewpoint does not correspond to any output image is selected in the Image Gallery, the viewer remained in a loading state. The only way to get out of it was to try and load another image successfully.
This PR stops displaying a loading icon as soon as it has been detected that the image could not be loaded, basing itself on the FloatImageViewer's global status, which is updated in QtAliceVision: the viewer is cleared and the error message corresponding to the global status is displayed (in the case described above: "Missing File").
This relates to alicevision/QtAliceVision#57.