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MFC Extension library : Enhanced print preview plug-in

, 24 May 2004
MFC Extension library : Enhanced print preview plug-in
eprintpreview.zip
EPrintPreview
EPrintPreview.def
EPrintPreview.dsp
EPrintPreview.dsw
res
pages.bmp
pages_to.bmp
PrevEnd.BMP
PreviewHome.BMP
PreviewNext.BMP
PrevPrevious.BMP
PrevPrint.BMP
PrevZoomin.bmp
PrevZoomout.BMP
prev_set.bmp
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

#include "mappedbitmapbutton.h"
#include "afxpriv.h"
#include <..\src\afximpl.h>

// override MFC class
class CMultiPagePreviewView : public CPreviewView
{
	DECLARE_DYNCREATE(CMultiPagePreviewView)
protected:
				CMultiPagePreviewView();
	virtual		~CMultiPagePreviewView();
public:
	// override
private:
	// these variables are used in the page layout algorithm
	int					m_Across;				// number across the page, >= 1
	int					m_Down;			    	// number down the page, >= 1
	CPoint				m_PageOffset;			// amount to move the page from one position to the next
	// bitmapped buttons in toolbar
	CMappedBitmapButton m_print;
	CMappedBitmapButton m_printSetup;
	CMappedBitmapButton m_next;
	CMappedBitmapButton m_previous;
	CMappedBitmapButton m_zoomIn;
	CMappedBitmapButton m_zoomOut;
	CMappedBitmapButton m_pages;
    // plug in library support
    CPlugInMap**	    m_pMaps;
	int				    m_MapCount;
	bool			    m_bSuppressThisMessage;
	CPIState		    m_state;
	
	//{{AFX_VIRTUAL(CMultiPagePreviewView)
protected:
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	virtual BOOL OnCmdMsg(UINT nID, int nCode, void* pExtra, AFX_CMDHANDLERINFO* pHandlerInfo);
	virtual BOOL OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pResult);
	//virtual void OnDraw(CDC* pDC);
	//}}AFX_VIRTUAL
	
protected:
	virtual void	PositionPage(UINT nPage);
	void			SetScaledSize(UINT nPage);
	void			DoZoom(UINT nPage, CPoint point);
	void			SetZoomState(UINT nNewState, UINT nPage, CPoint point);
	CSize			CalcPageDisplaySize();
	void			SetupScrollbar();
    int             GetPrintOrientation() const;
    bool            SetPrintOrientation(int mode) const;
	// note that is you change the maximum number of pages that can be displayed in preview mode
	// you have to increase the size of this array to make sure there is an entry available for every
	// possible page that can be shown at once.
	PAGE_INFO		m_pageInfoArray2[9]; // Embedded array for the default implementation - replaces MFC one of size 2!

#ifdef _DEBUG
	virtual void	AssertValid() const;
	virtual void	Dump(CDumpContext& dc) const;
#endif
	
protected:
	//{{AFX_MSG(CMultiPagePreviewView)
	afx_msg int		OnCreate(LPCREATESTRUCT lpCreateStruct);
	afx_msg void	OnNumPageChange();
	afx_msg void	OnZoomIn();
	afx_msg void	OnZoomOut();
	afx_msg void	OnUpdateNumPageChange(CCmdUI* pCmdUI);
	afx_msg void	OnUpdateZoomIn(CCmdUI* pCmdUI);
	afx_msg void	OnUpdateZoomOut(CCmdUI* pCmdUI);
	afx_msg void	OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg BOOL	OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
	afx_msg void	OnPreviewPages();
	//}}AFX_MSG
	afx_msg BOOL	OnToolTipNotify(UINT id, NMHDR *pNMHDR, LRESULT * pResult);
	afx_msg void	OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
	afx_msg void	OnLandscape();
	afx_msg BOOL	OnMouseWheel(UINT nFlags, short zDelta, CPoint pt);
    afx_msg void    OnPrintSetup();
	DECLARE_MESSAGE_MAP()
};

// the additional zoom level factors that we support when zoomed in
// the default MFC range is 0 (ZOOMED_OUT), 1 and 2
#define ZOOM_IN_150     3
#define ZOOM_IN_200     4
#define ZOOM_IN_400     5

//{{AFX_INSERT_LOCATION}}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Roger Allen
Software Developer (Senior) Sirius Analytical Instruments
United Kingdom United Kingdom
A research and development programmer working for a pharmaceutical instrument company for the past 17 years.
 
I am one of those lucky people who enjoys his work and spends more time than he should either doing work or reseaching new stuff. I can also be found on playing DDO on the Cannith server (Send a tell to "Maetrim" who is my current main)
 
I am also a keep fit fanatic, doing cross country running and am seriously into [url]http://www.ryushinkan.co.uk/[/url] Karate at this time of my life, training from 4-6 times a week and recently achieved my 1st Dan after 6 years.

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