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CPrintPreviewImage Class Reference

class CPrintPreviewImage : public CBase

Print preview image.

This class provides a standard print preview image. An object of this type should be owned by a control, which is in turn owned by the print preview dialog. The control's window provides the region into which this object draws the preview image.

The class provides a callback to the application code that draws the preview pages.

Inherits from

CPrintPreviewImage
- CBase

Nested Classes and Structures

Public Member Functions
	~CPrintPreviewImage ()
IMPORT_C void	DrawL (const TPoint &, const TRect &)
IMPORT_C void	FormatL ( TInt , TInt , TInt )
IMPORT_C CPrintPreviewImage *	NewL ( CPrintSetup &, MPageRegionPrinter &, RWsSession &, RWindow &, const TSize &, const TPrintPreviewFormat &)
IMPORT_C void	SetMargins ( TMarginState )
IMPORT_C void	SetNumBands ( TInt )
IMPORT_C void	SetObserver ( MPrintProcessObserver &)

Private Member Functions
	CPrintPreviewImage ( CPrintSetup &, MPageRegionPrinter &, RWsSession &, RWindow &, const TSize &, const TPrintPreviewFormat &)
void	CalculateHeaderFooterRects ( TRect &, TRect &)
void	ConstructL ()
void	DrawBorder ( CGraphicsContext *)
void	DrawExtremities ( CGraphicsContext *)
void	DrawLabel ( CGraphicsContext *, TInt )
void	DrawMargins ( CGraphicsContext *)
void	DrawToGutter ( CGraphicsContext *, TInt )
TBool	IsFirstPanel ( TInt )
TBool	IsLastPanel ( TInt )
void	NotifyBandPrinted ( TInt , TInt , TInt )
void	NotifyPrintEnded ( TInt )
void	NotifyPrintStarted ( TPrintParameters )
void	PrintBandL ( CGraphicsDevice *, TInt , const TBandAttributes &)
void	ScrollPanels ()
void	SetLabelWidth ()
TInt	SetPanelArrayL (const TInt , const TInt )

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()

Public Member Enumerations
enum	TMarginState { EShowMargins , EHideMargins }

Private Attributes
TSize	iActualGutter
MPageRegionPrinter *	iAppBodyPrinter
CPrintPreviewDevice *	iDevice
TRange	iDrawRange
TPrintPreviewFormat	iFormat
CFont *	iLabelFont
TSize	iLabelSize
TMarginState	iMarginState
TInt	iNumBands
TInt	iNumPagesInDoc
MPrintProcessObserver *	iObserver
TPoint	iOrigin
CArrayFix < TPreviewPanel > *	iPanelArray
TSize	iPanelSizeInPixels
TPrintParameters	iPrintParams
CPrintSetup *	iPrintSetup
TSize	iRndError
TSize	iWinSize
RWindow *	iWindow
RWsSession *	iWsSession

Constructor & Destructor Documentation

CPrintPreviewImage(CPrintSetup &, MPageRegionPrinter &, RWsSession &, RWindow &, const TSize &, const TPrintPreviewFormat &)

CPrintPreviewImage	(	CPrintSetup &	aPrintSetup,
		MPageRegionPrinter &	aBodyPrinter,
		RWsSession &	aWsSession,
		RWindow &	aWindow,
		const TSize &	aMaxWindowSize,
		const TPrintPreviewFormat &	aStaticFormat
	)	[private]

Parameters

CPrintSetup & aPrintSetup
MPageRegionPrinter & aBodyPrinter
RWsSession & aWsSession
RWindow & aWindow
const TSize & aMaxWindowSize
const TPrintPreviewFormat & aStaticFormat

~CPrintPreviewImage()

IMPORT_C

~CPrintPreviewImage

(

)

[virtual]

Destructor.

This ends printing, and frees all resources owned by the CPrintPreviewImage object, prior to its destruction.

Member Functions Documentation

CalculateHeaderFooterRects(TRect &, TRect &)

void	CalculateHeaderFooterRects	(	TRect &	aHeaderRectInPixels,
			TRect &	aFooterRectInPixels
		)	[private]

Parameters

TRect & aHeaderRectInPixels
TRect & aFooterRectInPixels

ConstructL()

void

ConstructL

(

)

[private]

DrawBorder(CGraphicsContext *)

void

DrawBorder

(

CGraphicsContext *

aGc

)

[private]

Parameters

CGraphicsContext * aGc

DrawExtremities(CGraphicsContext *)

void

DrawExtremities

(

CGraphicsContext *

aGc

)

[private]

Parameters

CGraphicsContext * aGc

DrawL(const TPoint &, const TRect &)

IMPORT_C void	DrawL	(	const TPoint &	aOrigin,
			const TRect &	aInvalidRegion
		)

Draws the preview.

This function should be called every time the window needs to be refreshed.

Note that typically this function is called in the owning control's Draw() function. Since DrawL() can leave it must be called within a trap harness. The normal behaviour is to clear the image rectangle if a leave occurs.

leave: KErrNoMemory If there is an out of memory error.

panic: 4 If the panel array has not been initialised. Call FormatL() to avoid this.

Parameters

const TPoint & aOrigin	The drawing origin.
const TRect & aInvalidRegion	The invalid region. This is assumed to be relative to aOrigin.

DrawLabel(CGraphicsContext *, TInt)

void	DrawLabel	(	CGraphicsContext *	aGc,
			TInt	aPageNo
		)	[private]

Parameters

CGraphicsContext * aGc
TInt aPageNo

DrawMargins(CGraphicsContext *)

void

DrawMargins

(

CGraphicsContext *

aGc

)

[private]

Parameters

CGraphicsContext * aGc

DrawToGutter(CGraphicsContext *, TInt)

void	DrawToGutter	(	CGraphicsContext *	aGc,
			TInt	aPageNo
		)	[private]

Parameters

CGraphicsContext * aGc
TInt aPageNo

FormatL(TInt, TInt, TInt)

IMPORT_C void	FormatL	(	TInt	aNumPagesInDoc,
			TInt	aFirstPageToDisplay,
			TInt	aNumPagesToView
		)

Sets preview formatting information.

This function can be called prior to previewing, or dynamically during previewing. It is used to alter the display parameters, e.g. turn margin indicator lines on or off, show/hide labels, change the number of panels viewed, or scroll the preview to show different pages.

Note:

The panels are fitted to the maximum window area available. This means that the print preview dialog will always be the same size irrespective of the number of panels displayed.

panic: 6 If the number of pages in the document or the number of pages to be previewed is not greater than zero.

panic: 7 If aFirstPageToDisplay is not less than aNumPagesInDoc or if the first page to display is less than zero.

Parameters

TInt aNumPagesInDoc	The number of pages in the document.
TInt aFirstPageToDisplay	The first page to display.
TInt aNumPagesToView	The number of pages to preview.

IsFirstPanel(TInt)

TBool

IsFirstPanel

(

TInt

aPageNum

)

[private, inline]

Parameters

TInt aPageNum

IsLastPanel(TInt)

TBool

IsLastPanel

(

TInt

aPageNum

)

[private, inline]

Parameters

TInt aPageNum

NewL(CPrintSetup &, MPageRegionPrinter &, RWsSession &, RWindow &, const TSize &, const TPrintPreviewFormat &)

IMPORT_C CPrintPreviewImage *	NewL	(	CPrintSetup &	aPrintSetup,
			MPageRegionPrinter &	aBodyPrinter,
			RWsSession &	aWsSession,
			RWindow &	aWindow,
			const TSize &	aMaxWindowSize,
			const TPrintPreviewFormat &	aStaticFormat
		)	[static]

Static constructor for a CPrintPreviewImage object.

Parameters

CPrintSetup & aPrintSetup	The printer setup.
MPageRegionPrinter & aBodyPrinter	A page region printer. Defines a function to print the body of each page band by band.
RWsSession & aWsSession	A window server session. This may be the GUI framework session accessed through iEikonEnv->WsSession().
RWindow & aWindow	The window in which the image is to be drawn. Typically this is the window of the owning control.
const TSize & aMaxWindowSize	The maximum size of the window aWindow.
const TPrintPreviewFormat & aStaticFormat	The print preview format.

NotifyBandPrinted(TInt, TInt, TInt)

void	NotifyBandPrinted	(	TInt	aPercentageOfPagePrinted,
			TInt	aCurrentPageNum,
			TInt	aCurrentCopyNum
		)	[private, virtual]

Parameters

TInt aPercentageOfPagePrinted
TInt aCurrentPageNum
TInt aCurrentCopyNum

NotifyPrintEnded(TInt)

void

NotifyPrintEnded

(

TInt

anErrorCode

)

[private, virtual]

Parameters

TInt anErrorCode

NotifyPrintStarted(TPrintParameters)

void

NotifyPrintStarted

(

TPrintParameters

aPrintParams

)

[private, virtual]

Parameters

TPrintParameters aPrintParams

PrintBandL(CGraphicsDevice *, TInt, const TBandAttributes &)

void	PrintBandL	(	CGraphicsDevice *	aDevice,
			TInt	aPageNo,
			const TBandAttributes &	aBand
		)	[private, virtual]

Parameters

CGraphicsDevice * aDevice
TInt aPageNo
const TBandAttributes & aBand

ScrollPanels()

void

ScrollPanels

(

)

[private]

SetLabelWidth()

void

SetLabelWidth

(

)

[private]

SetMargins(TMarginState)

IMPORT_C void

SetMargins

(

TMarginState

aState

)

Sets whether or not margins are displayed.

Parameters

TMarginState aState

The margin state - on or off.

SetNumBands(TInt)

IMPORT_C void

SetNumBands

(

TInt

aNum

)

Sets the number of print bands to be drawn in the preview.

On construction, the number of bands is initialised to to 1.

Parameters

TInt aNum

The number of print bands.

SetObserver(MPrintProcessObserver &)

IMPORT_C void

SetObserver

(

MPrintProcessObserver &

aObserver

)

Sets the process observer.

The observer is informed of events occurring during print previewing. It allows error dialogs to be displayed by the GUI print preview dialogs if there are problems during previewing.