Drawing Chart is blank

[TestAlways]

In previous versions, I used Method 1 below without fail. But in moving to the latest version, it doesn't work. I did some testing and Method 2 works fine:

Code: Select all

    //Method 1    
    lChart.Draw(aRG.Bitmap.Canvas, lRect);
    CodeSite.Send('Batch Gap Chart', aRG.Bitmap);  //  <--- this is blank

    //Method 2
    lBmp := lChart.TeeCreateBitmap(clWhite, lRect);
    try
      aRG.Bitmap.Assign(lBmp);
      CodeSite.Send('Chart Bitmap', lBmp);
    finally
      lBmp.Free;
    end;

I implemented Method 1 in a demo application and it worked fine. Any reason it might not be working?

[Yeray]

Hi Ed,

I'm trying the following in a new simple application with just a chart and two TImage in the form, and everything works as expected in the actual version, doesn't it for you?

Code: Select all

procedure TForm1.FormCreate(Sender: TObject);
begin
  Chart1.AddSeries(TBarSeries).FillSampleValues();

  Chart1.Draw(Image1.Canvas, Chart1.ClientRect);
  Image2.Picture.Bitmap.Assign(Chart1.TeeCreateBitmap(clWhite, Chart1.ClientRect));
end;

[TestAlways]

It works in my demo, but it did not work in my application. I cannot tell you why.

[Yeray]

Hi Ed,

There were some changes in the drawing process in the last releases:
http://www.teechart.net/support/viewtop ... 438#p49438

So I wouldn't discard the possibility that some related functions may have been affected.
If you find an easy way to reproduce it consistently so we can reproduce, debug,... it here, we'll be pleased to take a deeper look at it.