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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Have Colorbar inherit from Axes","articleBody":"### Describe the issue\r\n\r\nA Colorbar currently stores the Axes that is used for drawing in the `cbar.ax` attribute, which many of the methods are then called internally like `self.ax.pcolormesh()`. My proposal is to move the Axes up a level and have Colorbar inherit from the new `CbarAxes` class (to become an Axes itself) and turn the previous call into `self.pcolormesh()` dropping `ax` attribute.\r\n\r\n**Benefits:** This would help with interactivity as proposed in #19515, by being able to identify if an axes is a Colorbar or not and then controlling properties based on that. It would also help with #20330, by giving the CbarAxes the ability to remove colorbar callbacks.\r\n\r\n**Drawbacks:** This adds a lot of easy-to-use methods onto a Colorbar now that may not be desired to directly expose to users. i.e. they could do `cbar.plot()` now, whereas before `cbar.ax.plot()` hides those capabilities a little bit more.\r\n\r\n### Proposed fix\r\n\r\nDefine the class as\r\n`class ColorbarBase(ColorbarAxes):`\r\n\r\nand set\r\n`self.ax = self` for people to keep using `cbar.ax` if they prefer. We could deprecate that on pass-through as well.\r\n\r\nSee [this branch](https://github.com/greglucas/matplotlib/tree/colorbar-inherit-axes) for an implementation.","author":{"url":"https://github.com/greglucas","@type":"Person","name":"greglucas"},"datePublished":"2021-06-02T03:23:11.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/20341/matplotlib/issues/20341"}