René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: AnnotationBbox does not return correct window_extent before first draw","articleBody":"### Bug summary\n\nI’m trying to use a constrained layout in a visualization that contains an artist that is an instance of AnnotationBbox, and matplotlib raises a warning saying constrained layout is not applied. The visual effect is not evident in this simple example, but it becomes very clear once we have multiple panels.\n\n### Code for reproduction\n\n```python\nimport matplotlib\r\nimport matplotlib.pyplot as plt\r\nfrom matplotlib.offsetbox import AnnotationBbox, TextArea\r\n\r\nfig, ax = plt.subplots(layout=\"constrained\")\r\n\r\nab = AnnotationBbox(\r\n    TextArea(\"Some text\", textprops={\"size\": 42}),\r\n    (0.5, 0.5),\r\n    xycoords=\"axes fraction\",\r\n    box_alignment=(0.5, 0.5),\r\n    pad=0\r\n)\r\n\r\nax.add_artist(ab)\r\nfig.set_facecolor(\"w\")\r\nfig.savefig(\"annotation_box.png\", dpi=300)\n```\n\n\n### Actual outcome\n\nUserWarning: constrained_layout not applied because axes sizes collapsed to zero.  Try making figure larger or axes decorations smaller.\r\n\n\n### Expected outcome\n\nNo warning should appear\n\n### Additional information\n\nThe following works without any warning\r\n\r\n```python\r\nfig, ax = plt.subplots(layout=\"constrained\")\r\nax.text(0.5, 0.5, \"Some text\", size=42, ha=\"center\")\r\nfig.set_facecolor(\"w\")\r\nfig.savefig(\"ax_text.png\", dpi=300)\r\n```\r\n\r\n\r\nThe problem with the constrained layout is more evident if I have two or more panels.\r\nOne way of fixing it (i.e. getting rid of the warning and bad functionality) is to do ab.set_in_layout(False) before doing ax.add_artist(ab).\r\n\r\nThis was first posted on Discourse https://discourse.matplotlib.org/t/constrained-layout-does-not-work-well-with-annotationbbox/23301\n\n### Operating system\n\nUbuntu 22\n\n### Matplotlib Version\n\n3.6.2\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n_No response_\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\npip","author":{"url":"https://github.com/tomicapretto","@type":"Person","name":"tomicapretto"},"datePublished":"2022-11-14T18:39:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":14},"url":"https://github.com/24453/matplotlib/issues/24453"}