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You can also type the value in the label and the line moves to that value.

Narcís wrote:Hi Matt,

You can use a TColorLineTool in synch with a TAnnotationTool as shown in the attached project. You could also do custom text drawing directly to TeeChart's canvas in the OnAfterDraw event, for example.

Hope this helps!

Narcís wrote:Hello,
Currently there's no built-in functionality to do that. Rectangle tool, similar to Annotation tool, supports editing with TeeChart for .NET. I have added this (TV52016160) to the wish-list to be considered for inclusion in future releases. In the meantime, the only option I can think of is using a TEdit which modifies both the ColorLine.Value and Annotation.Text. You could make that TEdit only visible when clicking in the Annotation tool using the OnClick or OnDblClick events. You could also position it in the Annotation tool position. I already showed you how to get and set its position.

Matt Venkat wrote:The example is perfectly working and great one. But if you zoom-in the graph, the annotation is still hanging on the same place. I tired to work around to get proper position of annotation. But I don't know how to get Top and Left of annotation.

procedure TForm1.Chart1Zoom(Sender: TObject);
begin
  Chart1.Draw;
  UpdateAnnotationPosition(ChartTool1.Value, ChartTool2);
end;

procedure TForm1.Chart1UndoZoom(Sender: TObject);
begin
  Chart1.Draw;
  UpdateAnnotationPosition(ChartTool1.Value, ChartTool2);
end;

procedure TForm1.Chart1Scroll(Sender: TObject);
begin
  UpdateAnnotationPosition(ChartTool1.Value, ChartTool2);
end;

Yeray wrote:Hi,
To update the annotation position afterzooming/unzooming/scrolling you should use the according event to move it as Narcís did in the example above. For example, you could enhance it with this:

Code: Select all

  Chart1.Draw;