Steema Central

Posted: **Fri Nov 17, 2006 7:17 pm**

Hi,

I am creating a TLineSeries with visible points. I need for the user to be able to click on any one of the points in the series and display detailed information about what the point represents. I thought I could simply add code to the OnClickPointer event - WRONG!

Whenever I add code to the OnClickPointer event for this series, Delphi raises the following exception when I run the program:
"Project Project1.exe raised exception class EReadError with message 'Property OnClickPointer does not exist'. Process stopped. Use Step or Run to continue."

Any idea why this is happening? I examined the code and everything *looks* ok.

I am using Delphi 6 Enterprise with TeeChart Pro 7.07.

Thanks in advance.

Rich

Posted: **Mon Nov 20, 2006 9:24 am**

Hi rackerson,

This is because in v7 TLineSeries doesn't have the OnClickPointer event. However we have added it in TeeChart v8 VCL which is the version we are currently working ing.

Posted: **Mon Nov 20, 2006 5:42 pm**

Hi Narcis,

Thanks for the quick reply but I am afraid I don't quite understand the answer. If you look at the following screen shot below, you will see that when I create a TLineSeries, it DOES have an OnClickPointer event. I am not running the version 8 beta, I only have version 7.07 installed.

Rich

Posted: **Tue Nov 21, 2006 9:51 am**

Hi Rich,

We have checked this and the event isn't public for v7 but exists. It can be used like this:

Code: Select all

procedure TForm1.FormCreate(Sender: TObject);
begin
Series1.OnClickPointer:=Series2ClickPointer;
end;

procedure TForm1.Series2ClickPointer(Sender: TCustomSeries; ValueIndex, X,
  Y: Integer);
begin
showmessage('xx');
end;

Posted: **Tue Nov 21, 2006 4:00 pm**

Ah okay. I should have thought of trying that.

Thanks!

Steema Central

Problem with OnClickPointer event

Problem with OnClickPointer event