How to convert a pixel point to a chart point

MarcelIbis · Post by **MarcelIbis** » Tue Feb 03, 2009 1:30 pm

How can I convert a point(x,y) from a mousemove event into a point of the chart x and Y axis?
Thanks in advance.

Marcel

Post by **Yeray** » Tue Feb 03, 2009 2:37 pm

Hi Marcel,

I recommend you to use the axis function CalcPosPoint, for example:

Code: Select all

procedure TForm1.Chart1MouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  Caption := 'X: ' + floattostr(Chart1.Axes.Bottom.CalcPosPoint(X)) + '  Y: ' + floattostr(Chart1.Axes.Left.CalcPosPoint(Y));
end;

MarcelIbis · Post by **MarcelIbis** » Tue Feb 10, 2009 1:57 pm

Hello Yeray,

Thank you for your suggestion.
Exactly what I needed!!

Marcel

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