OnClick event for arrow in TArrowSeries

[Rolf Fankhauser]

Hi all,

Is there an event for clicking on (or moving over) an arrow in a TArrowSeries? I can only click on the start point of the arrow but not on the arrow. I would like to implement that the cursor changes to crHandPoint if it is over an arrow and to show some data in a popup window if the arrow is clicked. Possible?

Thanks in advance for any help!

Best regards,

Rolf

[Rolf Fankhauser]

It seems to be a bug in an older version. In C++Builder XE2 with TChart Std v2011.03.32815 it's working! I used OnMouseEnter and OnMouseLeave to set the cursor style.
But when I click the button of the popup window to close it, a white zoom frame is drawn from the point where I clicked the arrow to the point where I closed the popup window. How can I prevent this (the drawing of the zoom frame)? I have to click again to get rid of the zoom frame but then the chart is zoomed what wasn't intended.
A possible workaround: I could deactivate zooming and add a button to enable zooming.

Best regards, Rolf

[Yeray]

Hi Rolf,

But when I click the button of the popup window to close it, a white zoom frame is drawn from the point where I clicked the arrow to the point where I closed the popup window. How can I prevent this (the drawing of the zoom frame)? I have to click again to get rid of the zoom frame but then the chart is zoomed what wasn't intended.

I've tried the following code but I don't see this effect:

Code: Select all

uses ArrowCha;

procedure TForm1.FormCreate(Sender: TObject);
begin
  with Chart1.AddSeries(TArrowSeries) as TArrowSeries do
  begin
    FillSampleValues(5);
    ArrowWidth:=32;
    ArrowHeight:=24;
  end;
end;

procedure TForm1.Chart1ClickSeries(Sender: TCustomChart;
  Series: TChartSeries; ValueIndex: Integer; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  with TForm.Create(Self) do
  begin
    Width:=100;
    Height:=100;
    Left:=Form1.Left+Chart1.Left+X-50;
    Top:=Form1.Top+Chart1.Top+Y;
    ShowModal;
  end;
end;

Could you please modify the code above or arrange a simple example project we can run as-is to reproduce the problem here?

A possible workaround: I could deactivate zooming and add a button to enable zooming.

It sounds as a possible workaround. However, if we can reproduce the problem here we'll study if disabling the zooming feature at OnMouseEnter or some other event solves the problem too.