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dxChart - How to access points in customizeLabel

created 8 years ago

Dear Sir or Madam,

in the attached demo file you see that a chart is displayed. I took the code from one of your widget demos. What I want to do is conditionally displaying a label for specific points. To achieve this I need to compare the value of the current point to the values of other points of the same series and to points of other series. When I call "pointInfo.series.getAllPoints()" (site.js, line 94), I get an empty array. The same is true for getAllPoints called on other series.

Thus my question is:
How do I compare the value of the current point to the values of other points in the same and other series within the customizeLabel-event?

I also reproduced this behavior with DevExtreme 2016.1.7.

Please note that I removed the packages-folder to reduce the size of the attachment.

Kind Regards

CosmosDev

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Answers approved by DevExpress Support

created 8 years ago (modified 8 years ago)

Hi,

When the customizeLabel function is executed, all points are not prepared yet. Use the customizeText event to check points and hide certain labels. For example:

JavaScript
customizeLabel: function (pointInfo) {  
        return {  
            customizeText: function(args){  
                var allPoints = pointInfo.series.getVisiblePoints();  
                    .....  
                if (condition) { // hide label  
                    return "";  
                }  
            },  
                visible: true  
        }  
}

Let me know if this information helps.

    Comments (3)
    C C
    CosmosDev 8 years ago

      Thank you Artem, this solves a part of my problem.
      I also have to change the label color based on the comparison to the other points. Is this possible?

      Kind Regards

      CosmosDev

      C C
      CosmosDev 8 years ago

        Hello Artem,

        I solved the problem in doing the comparison of the values within the original data source (I identified the corresponding value-object via the "argument").
        It would still be great if this was possible working directly with the points.

        Kind Regards.

        CosmosDev

        Artem (DevExpress Support) 8 years ago

          Thanks for the update. Currently, customizeLabel and customizePoint handlers are executed before points are created. So, your solution is correct.

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