Export Chart Question

[hansw]

Export to jpg or GIF works fine.

In the OnAfterDraw() I do several line drawings, and these are never exported with the chart.

How can I make it export my drawings with the chart ?

Thanks
Hans W

[Pep]

Hi Hans,

there's no problem getting Canvas drawing methods and properties to write to a JPEG file (in the OnAfterDraw() event recommended in Tutorial 13 - Custom Drawing on the Chart Panel) using the following example:

Code: Select all

Private Sub Command1_Click()
With TChart1
    .Export.SaveToJPEGFile "C:\TestFiles\file.jpg", False, jpegBestQuality,
95, 400, 400
End With
End Sub

Private Sub Form_Load()
TeeCommander1.Chart = TChart1
With TChart1
    .AddSeries scLine
    .AddSeries scLine
    For i = 0 To 1
        .Series(i).FillSampleValues 10
    Next i
End With
End Sub

Private Sub TChart1_OnAfterDraw()
With TChart1
    .Canvas.Font.Name = "Verdana"
    .Canvas.Font.Size = 16
    .Canvas.Font.Color = vbCyan
    .Canvas.TextOut 200, 200, "HELLO"
End With
End Sub

Could you test if it works for you ?

Josep Lluis Jorge
http://support.steema.com

[hansw]

OK I'm drawing in the OnAfterDraw() like this
m_Chart1.GetCanvas().GetPen().SetColor(pt.crColor);
m_Chart1.GetCanvas().MoveTo( X, m_Chart1.GetAxis().GetTop().GetPosition());
m_Chart1.GetCanvas().LineTo( X, m_Chart1.GetAxis().GetBottom().GetPosition());

Then when the user clicks send chart by email I use this code
The chart is fine, but the lines do not show on the jpeg image.

What now ?
Thanks
Hans W


void C_TeeChartView::OnEmailChart()
{
char lpBuffer[MAX_PATH];
DWORD error = GetTempPath(MAX_PATH, lpBuffer );
strcat (lpBuffer,"Chart1.jpg");

m_Chart1.GetExport().GetAsJPEG().SetCompressionQuality(90);
m_Chart1.GetExport().GetAsJPEG().SetGrayScale(false);
m_Chart1.GetExport().GetAsJPEG().SetHeight(400);
m_Chart1.GetExport().GetAsJPEG().SetWidth(600);
m_Chart1.GetExport().GetAsJPEG().SaveToFile(lpBuffer);
m_Chart1.GetExport().EmailFile(lpBuffer);
}

[Christopher]

Hi -

Then when the user clicks send chart by email I use this code
The chart is fine, but the lines do not show on the jpeg image.

I imagine that this is because the C_TeeChartView::OnEmailChart() event, which is not a TeeChart event, is being called before the Chart has fired the OnAfterDraw() event. Have you tried calling ITChart.Repaint() or IEnvironment.InternalRepaint() before you export the Chart to JPEG?

[hansw]

I used m_Chart1..Repaint() which did make the extra lines appear, however the annotations are no in the correct place.

By correct place I mean X,Y the are way off form where they appear in the chart before it is exported.

So I looked for IEnvironment.InternalRepaint()

And as usual I could not find it.

C++ users only have the few (sometimes not working) examples and a small tutorial for help, and the hints in the VC IDE which can take hours use and are of very little help for learning TeeChart.

VB help for VC+= users is not good enough. I have zero use for VB and can't spend time learning it. It's a craby language about as bad as delphi.

begin
end

who has time to type all those begin and ends when a simple

{
}

does the same thing... long live VC++

[Christopher]

Hi --

So I looked for IEnvironment.InternalRepaint()

And as usual I could not find it.

Have you had a look for "IEnvironment" in the Index of TeeChart's Help file?

Under "InternalRepaint" you will find a VB example that looks a bit like this:

Code: Select all

With TChart1
    .Environment.InternalRepaint
End With

In VC++, the "translation" looks like this:

Code: Select all

m_Chart1.GetEnvironment().InternalRepaint();

[hansw]

thanks..
I still hate VB crap language...

With
End With...

That requires 10 more characters than sthe same statement in C, I've already had carpal tunnel surgery... crap language...