Captions for data - composite/scatter chart

700

Ravi posted over 16 years ago

Hi all,

I have created a scatter chart in a composite chart and have added a series of data to it.

I am wondering whether there is any function to define a text against every point in the graph (similar to excel).

Thx in advance

17605

Teodor Taushanov posted over 15 years ago in reply to Ravi

Try getting the last service release from:

http://ko.infragistics.com/Membership/Default.aspx?panel=Downloads
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700

Ravi posted over 15 years ago in reply to Teodor Taushanov

Hi Teodor,

If the above bug is fixed, which patch should I update ?

Do let me know.

Thanks.
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Teodor Taushanov posted over 16 years ago in reply to Ravi

Unfortunately this is a bug. I have entered it into our bug tracking system (BR32667) and fixed it, so it will be a part of the next release.
For now as workaround I can offer you to use the following code:

ChartLayerAppearance chartApp = this.ultraChart1.CompositeChart.ChartLayers[0];
ScatterChartAppearance scatterApp = chartApp.ChartTypeAppearance as ScatterChartAppearance;
ChartTextAppearance textApp = new ChartTextAppearance();
textApp.Row = -2;

textApp.Column = -2;
textApp.Visible = true;textApp.ItemFormatString = "<MY_VALUE>";
scatterApp.ChartText.Add(textApp);

Hashtable labelHashTable = new Hashtable();
labelHashTable.Add("MY_VALUE", new MyLabelRenderer(this.ultraChart1));
this.ultraChart1.LabelHash = labelHashTable;

...

public class MyLabelRenderer : IRenderLabel

{
private XYSeries xySeries;
/// <summary>

/// Initializes a new instance of the <see cref="MyLabelRenderer"/> class.

/// </summary>
public MyLabelRenderer(UltraChart ultraChart)
{
this.xySeries = ultraChart.Series[0] as XYSeries;
}

/// <summary>

/// This is called for each label item being rendered.

/// </summary>

/// <param name="context"></param>

/// <returns>

/// The string to be displayed for the current label.

/// </returns>
public string ToString(Hashtable context)
{
int row = (int)context["DATA_ROW"];
XYDataPoint xyPoint = this.xySeries.Points[row];
return xyPoint.Label;
}

}
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700

Ravi posted over 16 years ago in reply to Teodor Taushanov

Hi Tedor,

Thanks for your reply..

I did that and its working fine....but i can ploy only either the X axis or Y Axis value....but i need the label column..

I am able to do that ONLY as a tooltip as below....

this.ultraChart1.Tooltips.Format = TooltipStyle.LabelPlusDataValue;

but i need to display it on the screen not as a tooltip...

when i tried the below one it displays as "ITEM_LABEL" on the screen...
ChartTextAppearance CT1 = new ChartTextAppearance();
CT1.ItemFormatString = "<ITEM_LABEL>";

Help me to solve my issue.... Thanks.....
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17605

Teodor Taushanov posted over 16 years ago

You can try something like:
ChartLayerAppearance chartApp = this.ultraChart1.CompositeChart.ChartLayers[0];
ScatterChartAppearance scatterApp = chartApp.ChartTypeAppearance as ScatterChartAppearance;
ChartTextAppearance textApp = new ChartTextAppearance();
textApp.Row = -2;

textApp.Column = -2;
textApp.Visible = true;textApp.ItemFormatString = "<DATA_VALUE_X>, <DATA_VALUE_Y>";
scatterApp.ChartText.Add(textApp);

More about formatting of the labels you can find here:

http://help.infragistics.com/Help/NetAdvantage/NET/2008.1/CLR2.0/html/Chart_Label_Formatting.html
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