Steema Central

Posted: **Mon Nov 03, 2008 12:45 pm**

Hi

I have a chart with some numeric values displayed as x-axis labels.
I would like to be able to move the mouse over one of these numbers and then do a database lookup to find the matching long descriptive text.
Is it possible to trigger on the mouse moving over an axis label and is it possible to show a kind of a popup box with the additional information (Or will I have to do that with a textbox or someting similar.?

Thanks in advance
Lars Iversen

Posted: **Mon Nov 03, 2008 1:07 pm**

Hi Lars,

Yes, you can do something like this:

Code: Select all

		public Form1()
		{
			InitializeComponent();
			InitializeChart();
		}

		private void InitializeChart()
		{
			tChart1.Aspect.View3D = false;

			Steema.TeeChart.Styles.Line line1 = new Steema.TeeChart.Styles.Line(tChart1.Chart);

			line1.FillSampleValues();

			tChart1.Axes.Bottom.Labels.Style = Steema.TeeChart.AxisLabelStyle.Text;
			tChart1.MouseMove += new MouseEventHandler(tChart1_MouseMove);
			tChart1.GetAxisLabel += new Steema.TeeChart.GetAxisLabelEventHandler(tChart1_GetAxisLabel);
		}

		void tChart1_GetAxisLabel(object sender, Steema.TeeChart.GetAxisLabelEventArgs e)
		{
			if ((sender == tChart1.Axes.Bottom) && (e.Series != null))
			{
				e.LabelText = e.Series.XValues[e.ValueIndex].ToString();	
			}			
		}

		private Steema.TeeChart.Tools.Annotation annotation1;

		void tChart1_MouseMove(object sender, MouseEventArgs e)
		{			
			int index = tChart1.Axes.Bottom.Labels.Clicked(e.X, e.Y);

			tChart1.Tools.Clear();

			if (index != -1)
			{
				annotation1 = new Steema.TeeChart.Tools.Annotation(tChart1.Chart);
								
				annotation1.Text = "Long text I retrieved from DB";
				annotation1.Shape.CustomPosition = true;
				annotation1.Shape.Left = e.X;
				annotation1.Shape.Top = e.Y;
			}
		}

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