René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Cursor blitting produces CheckButton issue (backend-agnostic)","articleBody":"### Bug summary\n\nWhenever CheckButtons are within a plot area, the `useblit=True` (in a cursor for example) produces visual errors with the buttons when the mouse is within the plot area so the cursor is active. The issue seems to be backend-agnostic (confirmed in Qt5Agg and TkAgg for now).\n\n### Code for reproduction\n\n```python\nimport matplotlib, matplotlib.pyplot\r\n\r\ncheckbutton1 = False\r\ncheckbutton2 = True\r\n\r\nfigure = matplotlib.pyplot.figure()\r\nmatplotlib.pyplot.subplots_adjust(top=0.9) # no bug without this line or if margin large enough\r\n\r\nax = figure.add_subplot()\r\nax_cursor = matplotlib.widgets.Cursor(ax, useblit=True) # no bug with useblit=False\r\n\r\nax_settings = matplotlib.pyplot.axes([0.8, 0.8, 0.1, 0.1])\r\ninput_settings = matplotlib.widgets.CheckButtons(ax_settings, [\"Set1\", \"Set2\"], [checkbutton1, checkbutton2])\r\n\r\nmatplotlib.pyplot.show()\n```\n\n\n### Actual outcome\n\n![image](https://user-images.githubusercontent.com/1191893/231394933-add82333-2ebb-4bf0-8c9b-66f5183191cf.png)\r\n\n\n### Expected outcome\n\nThe check mark for _Set2_ is missing even though `checkbutton2 = True`. When the mouse leaves the area and deactivates cursor, the check mark reappears.\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nGNU/Linux\n\n### Matplotlib Version\n\n3.7.1\n\n### Matplotlib Backend\n\nTkAgg, Qt5Agg\n\n### Python version\n\n3.10.10\n\n### Jupyter version\n\nno Jupyter\n\n### Installation\n\nLinux package manager","author":{"url":"https://github.com/drws","@type":"Person","name":"drws"},"datePublished":"2023-04-12T08:17:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/25670/matplotlib/issues/25670"}