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OnPrint Does not get called from CFormView
Posted on 2013-01-02
I am working on MDI Application which has all views as CFormView Derived.
On one of view there is graph displayed which needs to be printed.
I overridden all necessary functions like OnBeginPrinting,OnPrint etc.
But these functions did not get called.Please Help
On one of view there is graph displayed which needs to be printed.
I overridden all necessary functions like OnBeginPrinting,OnPrint etc.
But these functions did not get called.Please Help
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6 Comments
Active 6 days ago
This might give you a hint (it appears when you create the project):
If you want the MFC printing support do not use CFormView based classes.
If you want the MFC printing support do not use CFormView based classes.
Active today
the print functions were provided by CView baseclass. so they were available also in class derived from CFormView which is derived from CScrollView which is derived from CView.
However you need to enable printing by overriding YourFormView::OnPreparePri
the CView::DoPreparePrinting would return non-zero while the CView::OnPreparePrinting returns zero (thus disabling further printing calls).
Sara
However you need to enable printing by overriding YourFormView::OnPreparePri
BOOL CExampleView::OnPreparePrinting(CPrintInfo* pInfo)
{
//The document has 2 pages.
pInfo->SetMaxPage(2);
return CView::DoPreparePrinting(pInfo);
}
the CView::DoPreparePrinting would return non-zero while the CView::OnPreparePrinting returns zero (thus disabling further printing calls).
Sara
Active today
you are welcome.
the meaning of the statement is that CFormView itself neither enables printing by an override of OnPreparePrinting nor has an implementation for the other printing member functions which would bring the formview's layout and data to paper.
Sara
No printing support will be available by CFormView
the meaning of the statement is that CFormView itself neither enables printing by an override of OnPreparePrinting nor has an implementation for the other printing member functions which would bring the formview's layout and data to paper.
Sara
Active 6 days ago
And the final sentance was:
If you want the MFC printing support do not use CFormView based classes.
A rough translation of the no print support is that you have to code it all yourself wheras most other CView based classes can use the same code for display to screen or print to paper.
If you want the MFC printing support do not use CFormView based classes.
A rough translation of the no print support is that you have to code it all yourself wheras most other CView based classes can use the same code for display to screen or print to paper.
Active today
MFC (VS2010) supports printing for
- CEditView
- CHTMLEditView
- COleDocObjectItem
the ColeDocObjectItem is for active-x data. the printing support is only an interface to "callback" functions of the active-x (which you have to provide).
the edit view is not more than an edit field "pushed" to a view and print support only would print plain text.
the html edit view uses the print function of the web browser.
if you enable printing by overriding OnPreparePrinting the implementation of the CView::OnPrint would call the OnDraw function of your view class virtually (passing a device context for the printing device) such that all drawing you made for the screen also would be made for the printer (see comment of Andy Ainscow). that doesn't work for form views cause the controls would draw themselves rather than been drawn by the parent formview.
in summary, mfc supports only a framework for printing.
Sara
- CEditView
- CHTMLEditView
- COleDocObjectItem
the ColeDocObjectItem is for active-x data. the printing support is only an interface to "callback" functions of the active-x (which you have to provide).
the edit view is not more than an edit field "pushed" to a view and print support only would print plain text.
the html edit view uses the print function of the web browser.
if you enable printing by overriding OnPreparePrinting the implementation of the CView::OnPrint would call the OnDraw function of your view class virtually (passing a device context for the printing device) such that all drawing you made for the screen also would be made for the printer (see comment of Andy Ainscow). that doesn't work for form views cause the controls would draw themselves rather than been drawn by the parent formview.
in summary, mfc supports only a framework for printing.
Sara
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