ImageToGraph
lazarus / 55-TAChart

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fpcoder · 2013-12-14 22:37

It would be convenient if ImageToGraph accepted the mouse X, Y
coordinates. Then there is no need to create an intermediate variable
just to call ImageToGraph.

I added a small overloaded function to the source as a test, maybe it
could be part of TAChart?

Code: [Select]function ImageToGraph(const AX, AY: Integer):
TDoublePoint; overload;
..
function TChart.ImageToGraph(const AX, AY: Integer): TDoublePoint;
begin
  Result.X := XImageToGraph(AX);
  Result.Y := YImageToGraph(AY);
end;

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wp · 2013-12-14 23:05

But you can use the result of function Point (unit types) as input
parameter for ImageToGraph:
Code: [Select]var
  p: TDoublePoint;
  ...
  p := Chart1.ImageToGraph(Point(X,Y));

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fpcoder · 2013-12-15 19:04

Thats an ok solution! I use that now.