#include </home/zeitlin/src/wx/github/interface/wx/print.h>

Inheritance diagram for wxPrintPreview:

Detailed Description

Objects of this class manage the print preview process.

The object is passed a wxPrintout object, and the wxPrintPreview object itself is passed to a wxPreviewFrame object. Previewing is started by initializing and showing the preview frame. Unlike wxPrinter::Print(), flow of control returns to the application immediately after the frame is shown.

注:: The preview shown is only exact on Windows. On other platforms, the wxDC used for preview is different from what is used for printing and the results may be significantly different, depending on how is the output created. In particular, printing code relying on wxDC::GetTextExtent() heavily (for example, wxHtmlEasyPrinting and other wxHTML classes do) is affected. It is recommended to use native preview functionality on platforms that offer it (OS X, GTK+).

Library: wxBase

Category: Printing Framework

参照:: Printing Framework Overview, wxPrinterDC, wxPrintDialog, wxPrintout, wxPrinter, wxPreviewCanvas, wxPreviewControlBar, wxPreviewFrame

Public Member Functions
	wxPrintPreview (wxPrintout printout, wxPrintout printoutForPrinting=NULL, wxPrintDialogData *data=NULL)
	Constructor.
	wxPrintPreview (wxPrintout printout, wxPrintout printoutForPrinting, wxPrintData *data)
	~wxPrintPreview ()
	Destructor.
virtual wxPreviewCanvas *	GetCanvas () const
	Gets the preview window used for displaying the print preview image.
virtual int	GetCurrentPage () const
	Gets the page currently being previewed.
virtual wxFrame *	GetFrame () const
	Gets the frame used for displaying the print preview canvas and control bar.
virtual int	GetMaxPage () const
	Returns the maximum page number.
virtual int	GetMinPage () const
	Returns the minimum page number.
virtual wxPrintout *	GetPrintout () const
	Gets the preview printout object associated with the wxPrintPreview object.
virtual wxPrintout *	GetPrintoutForPrinting () const
	Gets the printout object to be used for printing from within the preview interface, or NULL if none exists.
virtual bool	IsOk () const
	Returns true if the wxPrintPreview is valid, false otherwise.
virtual bool	PaintPage (wxPreviewCanvas *canvas, wxDC &dc)
	This refreshes the preview window with the preview image.
virtual bool	Print (bool prompt)
	Invokes the print process using the second wxPrintout object supplied in the wxPrintPreview constructor.
virtual bool	RenderPage (int pageNum)
	Renders a page into a wxMemoryDC.
virtual void	SetCanvas (wxPreviewCanvas *window)
	Sets the window to be used for displaying the print preview image.
virtual bool	SetCurrentPage (int pageNum)
	Sets the current page to be previewed.
virtual void	SetFrame (wxFrame *frame)
	Sets the frame to be used for displaying the print preview canvas and control bar.
virtual void	SetPrintout (wxPrintout *printout)
	Associates a printout object with the wxPrintPreview object.
virtual void	SetZoom (int percent)
	Sets the percentage preview zoom, and refreshes the preview canvas accordingly.

List of all members.

Constructor & Destructor Documentation

wxPrintPreview::wxPrintPreview	(	wxPrintout *	printout,
		wxPrintout *	printoutForPrinting = `NULL`,
		wxPrintDialogData *	data = `NULL`
	)

Constructor.

Pass a printout object, an optional printout object to be used for actual printing, and the address of an optional block of printer data, which will be copied to the print preview object's print data.

If printoutForPrinting is non-NULL, a "Print..." button will be placed on the preview frame so that the user can print directly from the preview interface.

注意:: Do not explicitly delete the printout objects once this constructor has been called, since they will be deleted in the wxPrintPreview destructor. The same does not apply to the data argument.

Use IsOk() to check whether the wxPrintPreview object was created correctly.

wxPrintPreview::wxPrintPreview	(	wxPrintout *	printout,
		wxPrintout *	printoutForPrinting,
		wxPrintData *	data
	)

wxPrintPreview::~wxPrintPreview ( )

Destructor.

Deletes both print preview objects, so do not destroy these objects in your application.

Member Function Documentation

virtual wxPreviewCanvas* wxPrintPreview::GetCanvas ( ) const [virtual]

Gets the preview window used for displaying the print preview image.

virtual int wxPrintPreview::GetCurrentPage ( ) const [virtual]

Gets the page currently being previewed.

virtual wxFrame* wxPrintPreview::GetFrame ( ) const [virtual]

Gets the frame used for displaying the print preview canvas and control bar.

virtual int wxPrintPreview::GetMaxPage ( ) const [virtual]

Returns the maximum page number.

virtual int wxPrintPreview::GetMinPage ( ) const [virtual]

Returns the minimum page number.

virtual wxPrintout* wxPrintPreview::GetPrintout ( ) const [virtual]

Gets the preview printout object associated with the wxPrintPreview object.

virtual wxPrintout* wxPrintPreview::GetPrintoutForPrinting ( ) const [virtual]

Gets the printout object to be used for printing from within the preview interface, or NULL if none exists.

virtual bool wxPrintPreview::IsOk ( ) const [virtual]

Returns true if the wxPrintPreview is valid, false otherwise.

It could return false if there was a problem initializing the printer device context (current printer not set, for example).

virtual bool wxPrintPreview::PaintPage	(	wxPreviewCanvas *	canvas,
		wxDC &	dc
	)		`[virtual]`

This refreshes the preview window with the preview image.

It must be called from the preview window's OnPaint member.

The implementation simply blits the preview bitmap onto the canvas, creating a new preview bitmap if none exists.

virtual bool wxPrintPreview::Print ( bool prompt ) [virtual]

Invokes the print process using the second wxPrintout object supplied in the wxPrintPreview constructor.

Will normally be called by the Print... panel item on the preview frame's control bar.

Returns false in case of error -- call wxPrinter::GetLastError() to get detailed information about the kind of the error.

virtual bool wxPrintPreview::RenderPage ( int pageNum ) [virtual]

Renders a page into a wxMemoryDC.

Used internally by wxPrintPreview.

virtual void wxPrintPreview::SetCanvas ( wxPreviewCanvas * window ) [virtual]

Sets the window to be used for displaying the print preview image.

virtual bool wxPrintPreview::SetCurrentPage ( int pageNum ) [virtual]

Sets the current page to be previewed.

virtual void wxPrintPreview::SetFrame ( wxFrame * frame ) [virtual]

Sets the frame to be used for displaying the print preview canvas and control bar.

virtual void wxPrintPreview::SetPrintout ( wxPrintout * printout ) [virtual]

Associates a printout object with the wxPrintPreview object.

virtual void wxPrintPreview::SetZoom ( int percent ) [virtual]

Sets the percentage preview zoom, and refreshes the preview canvas accordingly.

Detailed Description

Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation