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Convert coordinates to pixels, and vice-versa

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  • #45082

    I want to overlay additional interactive elements on my chart using custom HTML. I want these elements to be positioned exactly as specific data values; similarly, given pixel coordinates within the chart container, I want to be able to determine the X/Y coordinate at that location.

    At a minimum, is there any way to determine:

    • the x coordinates for the minimum and maximum values on a horizontal axis
      • alternatively, the amount of padding to the left of the minimum and right of the maximum
    • the y coordinates for the minimum and maximum values on a vertical axis
      • alternatively, the amount of padding above the maximum and below the minimum values

    I’d love if the chart had a method like “pxToCoord()” that allowed sending in pixel values and getting back chart coordinates, a method like coordToPx() that allowed sending in X/Y value and getting back pixel offsets within the container. But I’m not sure how these would work with multiple axes.

    • This topic was modified 6 months, 2 weeks ago by Phrogz. Reason: formatting
    #45084

    I’ve just discovered chart.plotArea which looks like it will do what I need.

    #45090

    @phrogz,

    Glad that you figured it out, and that works for you.


    Ananya Deka
    Team CanvasJS

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