Steema Central

Posted: **Sun May 20, 2007 4:56 pm**

Hi

What is 'the' recommended way to print and to preview more than one chart on a page, without running into problems with strange fonts, line sizes, etc. What is the recommended example I should study?

I have read most of the questions/answers about printing, but after hours

of reading and trying and frustration, I know I have to ask for help. I am using VS2005, C++, native, Teechart Pro 7.0.0.5 ActiveX.

I have dynamically created two Charts and I am able to update the charts, and view and browse large data files.

Now I want to preview and print these charts, i.e. I want to put the charts on a page, and combine the charts with other elements , such as header and footer texts.

In the Create of a Class inherited from CView I defined the two charts (Classes inherited from CTChart)

CChart * pChart = new CChart( GetDocument() );
pChart->Create(lpszClassName,"", dwStyle, CRect(0,0,50,50), this, IDC_TCHART1, pContext);
pChart->AttachControlSite(this); // ?? is this really necessary?
m_chartarray.Add( pChart );

in the OnSize function I position both Graphs in the View. Works fine, and flexible

What is THE recommended way to preview and print the charts on the same page, with the best quality output (fonts, ticks on axis, etc.). I saw the Printing example but the output of that example creates poor quality charts (background, grid, fonts etc.).

I tried using CTeePreviewPanel. I created a dialog (CPrintPrevDlg), inserted the activeX component, added a control variable (m_PrintPrev), and I tried to use the recommended? example I saw in another post on this forum.

CPrintPrevDlg PrevDlg;

CChart * pChart = m_chartarray[0];

pChart->GetPrinter().SetPrintProportional(false);
pChart->GetPrinter().SetMarginLeft(2);
pChart->GetPrinter().SetMarginTop(2);
pChart->GetPrinter().SetMarginRight(40);
pChart->GetPrinter().SetMarginBottom(40);
pChart->GetPrinter().SetDetail(100);

PrevDlg.m_PrintPrev.AddChartLink(pChart->GetChartLink());;
PrevDlg.DoModal();

But now nothing happens, I see the Preview dialog, I see the PrintPrev Canvas with the margin lines, I can drag these lines, but there is no chart or signal displayed. And I still do not know whether this approach will provide the best quality prints or that I should try another strategy.

Your help is greatly appreciated..

Posted: **Thu May 31, 2007 2:01 pm**

Hi jeroen,

I've already sent you an example on how to print several charts in a preview panel.

To choose the margins of which chart you want to change in the preview panel you can use AddChart method to select the active chart to modify.

Could you please look at the example, modify it and send it to us so that we can reproduce your problem here?

You can post your files at news://www.steema.net/steema.public.attachments newsgroup or at our upload page.

Thanks in advance.

Posted: **Sat Jun 02, 2007 10:38 pm**

Hi Narcis

Thanks for the PreviewMultiplaChartsDlg code. I want to combine the printing of several charts on one page with a header & footer text, as many others in this forum I saw. So I think I should use something like:

void CPreviewMultiplaChartsDlg::OnAfterDrawTeepreviewpanel()
{
int x = m_Preview.GetCanvas().GetWidth()/2;
int y = m_Preview.GetCanvas().GetHeight()/2;
m_Preview.GetCanvas().GetFont().SetHeight(-13); // note the - sign!
m_Preview.GetCanvas().TextOut(x,y,"HOLA");
}

If i do it like this the text IS output in preview mode, but IS NOT output on the printer (which is just a regular DeskJet type). If I debug I can see that the canvas seems to be the canvas of the preview panel not the canvas of printer (if I trace height and width of the canvas). I have also tried UpdateData calls, but without effect.

Question 1, Is this a known bug? Is there any way to output text on the printer around the charts if I use your CPreviewMultiplaChartsDlg example?

Question 2, I noticed that in preview mode, in the OnAfterDrawTeepreviewpanel call, the left, top of the canvas, is the left top of the TeePreviewPanel control (thus in the gray area, not in the printer page preview), how can I find the rectangle of the white printer page preview area?

Thanks!
Jeroen

Posted: **Mon Jun 11, 2007 9:24 am**

Hi Jeroen,

Sorry for the delayed reply. Please find below the answers to your questions:

1. To be able to print as in the print preview you should add the text again in OnBefore print event, for example, something like this the code below but using TextOut (as done in the print preview) insted of an annotation tool.

Code: Select all

procedure TForm1.Chart1BeforePrint(Sender: TCustomTeePanel; Canvas: TCanvas;
  var R: TRect);
begin
  oldleft:=charttool1.Left;
  oldtop:=charttool1.Top;
  ChartTool1.Left:=R.Left+ChartTool1.Left;
  ChartTool1.Top:=R.Top+ChartTool1.Top;
  printed:=true;
end;

2. For that you should use PaperRect, for example:

Code: Select all

Private Sub TeePreviewPanel1_OnAfterDraw()
  If Check1.Value = 1 Then
    With TeePreviewPanel1.Canvas
      .Font.color = vbRed
      .Font.Size = 12
      .TextOut TeePreviewPanel1.PaperRect.Left + 10, _
               TeePreviewPanel1.PaperRect.Top + 6, _
               "Some text"
    End With
  End If
End Sub

There's also an example at All Features\Welcome!\Printing\Print Preview\Custom Drawing in the features demo. You'll find the demo at TeeChart's program group.

Posted: **Wed Jun 13, 2007 7:57 am**

Hi Narcis

Thanks. I have downloaded the latest Active X to be sure I am up to date, but it seems the GetPaperRect() method is not exported, I can not use it in VS2005, as far as I can see. In one of my TeePreviewPanel.h files I see a comment that

// method 'GetPaperRect' not emitted because of invalid return type or parameter

I assume that you know that problem?

Kind regards

Jeroen

Posted: **Wed Jun 27, 2007 4:20 pm**

Hi Jeroen,

yes, you're correct, using VC++ does not allow to access to the GetPaperRect property. We can consider it as a bug or missing feature.
We'll try to add this functionality for the next TeeChart Pro v8 which will be out soon.