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[Feature request] Allow annotations and layout images to be positioned relative to the container, not just the x/y axes or plotting area

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javascript

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该请求涉及 annotation 和 layout-image 的定位,并以现有的 title_xref 和 title_yref 行为作为参考。首先跟踪 annotation 和 image 如何处理 xref 和 yref 选项,然后将其与 title 相对于 container 的定位进行比较。当 annotation 和 image 都支持 container,且不会导致 axis 或 plotting-area placement 出现回归时,即视为完成;固定像素 image-size 的问题可能需要单独的范围。

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描述

feature P2

One thing I really appreciate about title positioning in Plotly is that I can set title locations relative to the container, not just the plotting area or x axis, via the title_xref and title_yref settings. This makes it much easier to achieve consistent title placement across different charts, as many different factors can change the shape of the plotting area.

Would it be possible to add container as an xref and yref option for annotations and images also? I've been needing to manually adjust these across charts, which can take a decent amount of time. (For PNG exports, I can achieve consistent placements by adding them in via Pillow, but this won't help for HTML-based charts.)

Also, one somewhat-related question (which I'm happy to move to a separate issue if needed): Is there a way to ensure that an image will always be the same size, in pixels, as long as the width of the chart (in pixels) is always the same? It appears that, even when the sizex and sizey settings stay the same, the image size can vary. (Since these values are relative to the chart's area, though, this is probably to be expected. But being able to specify a fixed size, e.g. 300x200px, would be fantastic.)

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