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Oleksandr Sir
590
Tooltips for all labels
posted

Hello,

1) I want to show tooltips for labels which are on the X and Y axis. For custom chart the solution with creating CustomTooltips class worked fine

public class CustomTooltips : IRenderLabel
{
string _tooltip = String.Empty;

public string Tooltip
{
get { return _tooltip; }
set { _tooltip = value; }
}

#region IRenderLabel Members

public string ToString(System.Collections.Hashtable context)
{
if (!_tooltip.Equals(String.Empty))
{
return _tooltip;
}
if (!context["SERIES_LABEL"].ToString().Equals(String.Empty))
{
return context["DATA_VALUE"].ToString();
}

return context["ITEM_LABEL"].ToString();
}

#endregion
}

than Mouse move event looks like this

private void ultraChart1_MouseMove(object sender, MouseEventArgs e)
{
ChartLayerCollection layers = ultraChart1.CompositeChart.ChartLayers;
foreach (ChartLayerAppearance layer in layers)
{
bool success = false;
if (layer.ChartLayer != null)
{
var text = layer.ChartLayer.ChartCore.GetChartPrimitiveFromPoint(e.Location) as Text;
if (text != null)
{
labels.Tooltip = text.GetTextString();
success = true;
}
}
if (!success)
{
labels.Tooltip = String.Empty;
}
}
}

but now I am trying to do the same for bar chart like this

private void ultraBarChart_MouseMove(object sender, MouseEventArgs e)
{
ChartLayerCollection layers = new ChartLayerCollection();
layers.Add(barChart.BarChart.ChartComponent);

but I can't figure out what to add to "layers" collection.

Can you help me out?

The same question regarding TimeSeries chart.

2) The other question is when I apply this solution in composite chart which consist of column and line chart, the tooltips on line chart originally were showing Y axis values (which was good for me), after solution the show X axis values. How can I take back Y axis values?

Thanks

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