Hello Erkin,
Thank you for writing back.
The provided detailed explanation is greatly appreciated.
RadChartView doesn't offer such functionality out of the box. However, I can suggest you the illustrated behavior in the attached gif file which is achieved by the following code snippet:
public RadForm1()
{
InitializeComponent();
LineSeries lineSeries = new LineSeries();
lineSeries.ShowLabels = true;
lineSeries.PointSize = new SizeF(8, 8);
lineSeries.DataPoints.Add(new CategoricalDataPoint(20, "Jan"));
lineSeries.DataPoints.Add(new CategoricalDataPoint(22, "Apr"));
lineSeries.DataPoints.Add(new CategoricalDataPoint(12, "Jul"));
lineSeries.DataPoints.Add(new CategoricalDataPoint(19, "Oct"));
this.radChartView1.Series.Add(lineSeries);
foreach (CategoricalDataPoint p in lineSeries.DataPoints)
{
p.Label = "";
}
this.radChartView1.ContextMenuOpening += radChartView1_ContextMenuOpening;
this.radChartView1.LabelFormatting += radChartView1_LabelFormatting;
RadMenuItem item = new RadMenuItem("Annotate");
item.Click += item_Click;
menu.Items.Add(item);
}
private void item_Click(object sender, EventArgs e)
{
if (lastClickedPoint != null)
{
lastClickedPoint.Label = lastClickedPoint.Value.ToString();
lastClickedPoint = null;
}
}
private void radChartView1_LabelFormatting(object sender, ChartViewLabelFormattingEventArgs e)
{
CategoricalDataPoint dataPoint = e.LabelElement.DataPoint as CategoricalDataPoint;
e.LabelElement.Text = dataPoint.Value.ToString();
e.LabelElement.BackColor = Color.Transparent;
e.LabelElement.BorderColor = Color.Black;
}
RadContextMenu menu = new RadContextMenu();
CategoricalDataPoint lastClickedPoint = null;
private void radChartView1_ContextMenuOpening(object sender, ChartViewContextMenuOpeningEventArgs e)
{
Point mouseLocation = radChartView1.PointToClient(Cursor.Position);
CategoricalDataPoint dataPoint = radChartView1.View.Renderer.HitTest(mouseLocation.X, mouseLocation.Y) as CategoricalDataPoint;
if (dataPoint != null)
{
e.ContextMenu = menu;
lastClickedPoint = dataPoint;
}
}
I hope this information helps. If you have any additional questions, please let me know.
Regards,
Dess
Telerik by Progress