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Thread: Is it possible to hide individual points or sections of a line chart?

  1. #1
    Sencha User
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    Default Is it possible to hide individual points or sections of a line chart?

    Hi
    I am a newbie to gxt and I am trying to solve a particular problem. I have modified the LineExample (which draws a line chart) which comes with the gxt-3.0.0-beta2 download; see the attached screenshot, chartLine1.jpg. The x-axis goes from Jan to Dec and y-axis goes from 0 to 100.
    Basically what I would like to do is to have a gap show up in the line chart i.e. have the line display from Jan to Feb than show a gap (no line) from Feb to Apr and display the line again for Apr to Dec.
    If I remove the I simply remove the point (Mar) from the data store using store(2) I get the line chart with the point missing and no gap, see the attached screenshot, chartLine2.jpg. Any help is greatly appreciated.
    Thanks in advance!
    Victor
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  2. #2
    Sencha User
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    You can over ride setLabelProvider, to create a gap on the TimeAxis.
    For example like this.

    time.setLabelProvider(new LabelProvider<Date>() {
    @Override
    // Otherwise show empty
    public String getLabel(Date item) {
    //Your logic of gap based on the item.
    }
    });

  3. #3
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    Default Thanks I will try that!

    Thanks I will try that!

  4. #4
    Sencha - GXT Dev Team BrendanC's Avatar
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    Related to this I have changed numeric axis and line series to handle values it cannot display like null and NaN. This could be used to create a gap between line series. This change is in SVN and will be in the next release.

  5. #5
    Sencha - GXT Dev Team BrendanC's Avatar
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    I have also just added a change in SVN for a gapless boolean on line series. Non-gapless series will use moveto instead of lineto for the path across gaps.

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