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Thread: [Chart] Clear old series markers

  1. #1
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    Question [Chart] Clear old series markers

    Greetings,

    what is the best way to remove the old series' sprites before (after) calling chart.redraw()?

    Basically, I am trying to define a chart that can dinamically adapt to various kinds of stores with column counts known only at runtime. I have succesfully managed to update the axes and series, however after calling redraw()/refresh(), the old series' sprites still remain.

    This is my code for binding a new store to the chart (this.chart is the chart, this is a wrapper panel):

    Code:
    setStore: function(store){
    this.store = store; var fields = this.store.model.prototype.fields.keys; this.chart.series.clear(); this.chart.axes.items[1].fields = fields; //just want to change the left axis, bottom stays the same
    for (var i = 1; i<fields.length; i++){
    this.dataView.series.add({type: 'line', axis: 'left', highlight: true, xField: 'startDate', yField: fields[i]});
    }
    this.chart.store = store; this.chart.refresh();
    }
    This code currently just draws the newly configured chart over the old one, keeping the old records visible. What is the best way to clear the background surface of a chart?

    Thank you for your time.

  2. #2
    Sencha - Sr Software Engineer mitchellsimoens's Avatar
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    It may be better to remove the chart and reinstantiate it.
    Mitchell Simoens @LikelyMitch
    Sencha Inc, Senior Software Engineer
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    Check out my GitHub, lots of nice things for Ext JS and Sencha Touch
    https://github.com/mitchellsimoens

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