Delphi-我如何在IntraWeb中使用TChart

Question

I'm using Delphi XE8 with IntraWeb XIV v14.0.49 i create a TIWForm and i drooped a TChart component on it.

On the design time the TChart displayed and i can set it up.

But on the run time there is no TChart on the web page.

Is there any setting should i configure to use it ?

Answer 1

It seems you must use the TChart with TIWImage to display it in the webpage.

I found the following method in IntraWeb demos

// this method copies a TChart to an TIWImage
procedure CopyChartToImage(const aChart: TChart; const aImage: TIWImage);
var
  xMetaFile: TMetafile;
  xBitmap: TBitmap;
  xRect: TRect;
begin
  xBitmap := aImage.Picture.Bitmap;
  xBitmap.Width := aChart.Width;
  xBitmap.Height := aChart.Height;
  aImage.Width := aChart.Width;
  aImage.Height := aChart.Height;

  xRect := Rect(0, 0, aChart.Width, aChart.Height);
  aChart.BufferedDisplay := False;
  xMetaFile := aChart.TeeCreateMetafile(False, xRect);
  try
    xBitmap.Canvas.Draw(0, 0, xMetaFile);
  finally
    FreeAndNil(xMetaFile);
  end;
end;

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