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Positioning Annotations Using Absolute Values

Prerequisites

You can configure positions of annotations either during their creation or after rendering them on a chart/gauge. Position annotation items by setting the positioning attributes (x, y, toX, toY, radius, and so on) to the required coordinates.

You can position annotations using:

  • Absolute values

  • Macros - that take dynamic values relative to chart elements

In this section, you will see how to position annotations using static values.

A spline chart with a rectangle annotation and a text annotation positioned at the top-right corner of the canvas is shown below:

FusionCharts will load here..

Click here to edit the above chart.

The code snippet to position the rectangle annotation is given below:

{
    "chart": {
        ...
    },
    "data": [{
        ...
    }],
    "annotations": {
            ...
        "groups": [{
            "items": [{
                "id": "dyn-labelBG",
                "type": "rectangle",
                "radius": "3",
                "x": "290",
                "y": "60",
                "tox": "390",
                "toy": "90",
                "color": "#0075c2",
                "alpha": "70",
                "origW": "400",
                "origH": "300"
            }]
        }]
    }
}

The attributes used to position annotations are as follows:

  • Specify the unique identification string for the group using the id attribute.

  • Set the x coordinate of the starting position of the annotation for the leftmost position (taken as zero) of the chart using the x attribute.

  • Set the y coordinate of the starting position of the annotation for the topmost position (taken as zero) of the chart using the y attribute.

  • Specify the x coordinate of the ending position of the annotation for the leftmost position (taken as zero) of the chart, using the toX attribute. Note that this attribute applies only to the rectangle and line annotations.

  • Specify the y coordinate of the ending position of the annotation for the topmost position (taken as zero) of the chart, using the toY attribute. Note that this attribute applies only to the rectangle and line annotations.

  • Specify the original width of the chart, in which the annotation will render as intended, using the origW attribute. It will be used as the reference width while automatically scaling annotations if a chart is resized.

  • Specify the original height of the chart, in which the annotation will render as intended, using the origH attribute. It will be used as the reference height while automatically scaling annotations if a chart is resized.

  • Specify the x coordinate position value of the final annotation items using the xShift attribute. When applying to scale, the value of this attribute will be included within the scale factor.

  • Specify the y coordinate position value of the final annotation items using the yShift attribute. When applying to scale, the value of this attribute will be included within the scale factor.