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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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難度
4/5
預估耗時
3-5 天
新手友好度
48/100
Issue 類型
功能
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
javascript

研究方向

此請求涉及 annotation 和 layout-image 的定位,並以現有的 title_xref 和 title_yref 行為作為參考。先追蹤 annotation 和 image 如何處理 xref 和 yref 選項,然後將其與 title 相對於 container 的定位進行比較。當 annotation 和 image 都支援 container,且不會導致 axis 或 plotting-area placement 發生回歸時,即表示完成;固定像素 image-size 的問題可能需要另外劃分範圍。

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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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JavaScript
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