Automatic padding based on the length of axis labels about vega HOT 5 CLOSED

+1 on this one.
Yes having autopadding would be very useful. Right now with very long label text they just got cut off this makes chart look very ugly. It would be nice if this could be solved with either autopadding or with text wrapping or with elipses in the labels. I've seen the same issue with out of the box D3 Axes would be great if this could be solved in Vega.

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It occurs to me that this might be tricky to do with headless rendering, since I don't believe that node.js provides any sort of getBBox() function for SVG text measuring. If this were to be implemented, perhaps when rendering in a browser, the text could be accurately measured, and in an environment where it cannot (e.g., node.js or broken browsers), it could fall back to a very crude estimation like fontPointSize*numberOfCharacters+aLittleExtraPadding.

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This issue could be generalized to include other attributes that would benefit from resizability, such as the number of tick labels. The use case I envision is to have the exact same visualization spec be usable for both a small 50x50 thumbnail version of a chart and a 1024x768 full-screen version of the chart. The marks themselves will currently be valid at any resolution, but the decorations (like axes and legends) would need to be smart about their rendering at different sizes & aspect ratios (such as increasing/decreasing the number of smart ticks, font sizes, legend size).

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+1

There is potential in not only resizing drawn elements, but dynamically adjusting tick drawing to avoid bunching. I'm desperate for "subdivide": "smart".

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Auto-padding was added in commit 00341c7. Auto-padding can be invoked by using "padding": "auto" in the top-level of the Vega spec and is now the default padding choice.

Currently padding is added in addition to the specified width and height. If there is interest, a future work might include the option to adjust width, height and padding to ensure that the chart fits within a specified bounds.

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