René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ColorbarAxes is an imperfect proxy for the Axes passed to Colorbar","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\nBefore the refactor, one would set colorbar axes to be pickable with `colorbar.ax.set_picker(True)`. Now, it is necessary to use the undocumented `colorbar.ax.inner_ax.set_picker(True)`. Likewise, with motion notify events, `MouseEvent.inaxes` is not `colorbar.ax` under any circumstances, it always is `colorbar.ax.inner_ax`.\r\n\r\nBut, this is not really about events so much as the fact that `Colorbar(ax).ax is ax == False` and all methods of `colorbar.ax` are actually bound to a different object, namely `colorbar.ax.inner_ax`, so they are acting on surprising, hidden state (from a user's perspective). \r\n\r\nWe could work around the events issue, but I feel like there would be an ongoing stream of bug reports without a comprehensive fix. On the other hand, I definitely don't want to revert `ColorbarAxes` entirely because I *really* like the improvements that it enabled.\r\n\r\n**Code for reproduction**\r\n\r\nPlease see #20471, which this issue blocks (in my opinion).\r\n\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: Win10\r\n  * Matplotlib version (`import matplotlib; print(matplotlib.__version__)`): master\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): tkagg\r\n  * Python version: 3.8.8\r\n  * Jupyter version (if applicable): \r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\ncc @jklymak ","author":{"url":"https://github.com/richardsheridan","@type":"Person","name":"richardsheridan"},"datePublished":"2021-06-22T00:50:13.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/20479/matplotlib/issues/20479"}