#include <PDFView.h>

Public Types
enum	PagePresentationMode { e_single_page = 1, e_single_continuous, e_facing, e_facing_continuous, e_facing_cover, e_facing_continuous_cover }

enum	TextSelectionMode { e_structural, e_rectangular, e_structural_algorithm_2 }

enum	PageViewMode { e_fit_page = 0, e_fit_width, e_fit_height, e_zoom, PVM_SIZE }

typedef void(*	CurrentPageProc )(int current_page, int num_pages, void *data)

typedef void(*	JavaScriptEventProc )(const char event_type, const char json, void *data)

typedef void(*	CurrentZoomProc )(double curr_zoom_proc, void *data)

typedef void(*	RenderBeginEventProc )(void *data)

typedef void(*	RenderFinishEventProc )(void *data, bool canceled)

typedef void(*	ThumbAsyncHandler )(int page_num, bool was_thumb_found, const char thumb_buf, int thumb_width, int thumb_height, void custom_data)

typedef void(*	RequestRenderInWorkerThreadProc )(void *custom_data)

typedef void(*	FindTextHandler )(bool success, PDF::Selection selection, void *custom_data)

Public Member Functions
	PDFView ()

	~PDFView ()

void	SetDoc (PDFDoc &doc)

void	OpenUniversalDoc (DocumentConversion &conversion)

void	CloseDoc ()

PDFDoc *	GetDoc ()

void	DocLock (bool cancel_threads)

void	DocUnlock ()

bool	DocTryLock (int milliseconds=0)

void	DocLockRead ()

void	DocUnlockRead ()

bool	DocTryLockRead (int milliseconds=0)

void	SetPagePresentationMode (PagePresentationMode mode)

PagePresentationMode	GetPagePresentationMode () const

void	SetColorPostProcessMode (PDFRasterizer::ColorPostProcessMode mode)

void	SetColorPostProcessMapFile (Filters::Filter image_file_contents)

ColorPt	GetPostProcessedColor (const ColorPt &color) const

void	SetColorPostProcessColors (unsigned int white_color, unsigned int black_color)

PDFRasterizer::ColorPostProcessMode	GetColorPostProcessMode () const

int	GetCurrentPage () const

int	GetPageCount () const

bool	GotoFirstPage ()

bool	GotoLastPage ()

bool	GotoNextPage ()

bool	GotoPreviousPage ()

bool	SetCurrentPage (int page_num)

bool	ShowRect (int page_num, const Rect &rect)

std::vector< int >	GetVisiblePages () const

double	GetZoom () const

bool	SetZoom (double zoom)

bool	SetZoom (int x, int y, double zoom)

bool	SmartZoom (int x, int y)

void	RotateClockwise ()

void	RotateCounterClockwise ()

Page::Rotate	GetRotation () const

int	GetPageNumberFromScreenPt (double x, double y) const

Point	ConvScreenPtToCanvasPt (const Point &pt) const

void	ConvScreenPtToCanvasPt (double &x, double &y) const

Point	ConvCanvasPtToScreenPt (const Point &pt) const

void	ConvCanvasPtToScreenPt (double &x, double &y) const

Point	ConvCanvasPtToPagePt (const Point &pt, int page_num=-1) const

void	ConvCanvasPtToPagePt (double &x, double &y, int page_num=-1) const

Point	ConvPagePtToCanvasPt (const Point &pt, int page_num=-1) const

void	ConvPagePtToCanvasPt (double &x, double &y, int page_num=-1) const

Point	ConvScreenPtToPagePt (const Point &pt, int page_num=-1) const

void	ConvScreenPtToPagePt (double &x, double &y, int page_num=-1) const

Point	ConvPagePtToScreenPt (const Point &pt, int page_num=-1) const

void	ConvPagePtToScreenPt (double &x, double &y, int page_num=-1) const

Point	SnapToNearestInDoc (const Point &screen_pt)

void	SetSnappingMode (UInt32 mode_flags)

Common::Matrix2D	GetDeviceTransform (int page_num=-1) const

void	SetErrorReportProc (PDFRasterizer::ErrorReportProc error_proc, void *data)

void	SetCurrentPageProc (CurrentPageProc curr_pagenum_proc, void *data)

void	SetJavaScriptEventCallBack (JavaScriptEventProc js_proc, void *data)

void	SetCurrentZoomProc (CurrentZoomProc curr_zoom_proc, void *data)

void	ExecuteAction (Action &action)

void	ExecuteAction (ActionParameter &action_param)

double	GetCanvasWidth () const

double	GetCanvasHeight () const

double	GetHScrollPos () const

double	GetVScrollPos () const

void	OnScroll (int pix_dx, int pix_dy)

void	SetHScrollPos (double pos)

void	SetVScrollPos (double pos)

void	OnSize (int width, int height)

bool	IsFinishedRendering (bool visible_region_only) const

void	CancelRendering ()

void	Update (bool all=false)

void	Update (const Rect &update)

void	Update (const Annot &annot, int page_num)

void	Update (const Field &field)

void	UpdatePageLayout ()

const char *	GetBuffer () const

void	UpdateBuffer ()

int	GetBufferWidth () const

int	GetBufferHeight () const

int	GetBufferStride () const

void	HideAnnotation (Annot annot)

void	ShowAnnotation (Annot annot)

void	SetDrawAnnotations (bool render_annots)

void	SetUrlExtraction (bool enabled)

LinkInfo	GetLinkAt (int x, int y)

void	SetFieldHighlightColor (const ColorPt &new_field_highlight_color)

void	SetHighlightFields (bool highlight_fields)

void	SetRequiredFieldBorderColor (const ColorPt &new_border_color)

void	SetSignatureHighlightColor (const ColorPt &new_signature_highlight_color)

void	SetAntiAliasing (bool enable_aa)

void	SetPathHinting (bool enable_hinting)

void	SetThinLineAdjustment (bool pixel_grid_fit, bool stroke_adjust)

void	SetImageSmoothing (bool smoothing_enabled=true)

void	SetCaching (bool enabled)

void	SetRasterizerType (PDFRasterizer::Type type)

void	SetGamma (double exp)

void	SetOverprint (PDFRasterizer::OverprintPreviewMode op)

void	SetOCGContext (const OCG::Context &ctx)

OCG::Context	GetOCGContext ()

void	UpdateOCGContext ()

void	SetRenderBeginProc (RenderBeginEventProc proc, void *data)

void	SetRenderFinishProc (RenderFinishEventProc proc, void *data)

void	SetTextSelectionMode (TextSelectionMode tm)

TextSelectionMode	GetTextSelectionMode () const

void	SetRightToLeftLanguage (bool flag)

bool	GetRightToLeftLanguage () const

bool	Select (double x1, double y1, double x2, double y2)

bool	SelectWithSnapping (double x1, double y1, double x2, double y2, bool snap_to_start, bool snap_to_end)

bool	SelectWithSmartSnapping (double x1, double y1, double x2, double y2)

bool	Select (double x1, double y1, int page1, double x2, double y2, int page2)

bool	SelectWithSnapping (double x1, double y1, int page1, double x2, double y2, int page2, bool snap_to_start, bool snap_to_end)

bool	SelectWithSmartSnapping (double x1, double y1, int page1, double x2, double y2, int page2)

bool	Select (const Highlights &highlights)

bool	Select (const Selection &select)

void	CancelFindText ()

void	SelectAll ()

bool	HasSelection () const

void	ClearSelection ()

Selection	GetSelection (int pagenum=-1) const

int	GetSelectionBeginPage () const

int	GetSelectionEndPage () const

bool	HasSelectionOnPage (int ipage) const

void	PrepareWords (int page_num)

bool	WereWordsPrepared (int page_num) const

bool	IsThereTextInRect (double x1, double y1, double x2, double y2) const

void	PrepareAnnotsForMouse (int page_num, double distance_threshold, double minimum_line_weight)

bool	WereAnnotsForMousePrepared (int page_num) const

Annot::Type	GetAnnotTypeUnder (double x, double y)

void	SetPageBorderVisibility (bool border_visible)

void	SetPageTransparencyGrid (bool trans_grid_visible)

void	SetDefaultPageColor (UInt8 r, UInt8 g, UInt8 b)

void	SetBackgroundColor (UInt8 r, UInt8 g, UInt8 b, UInt8 a=255)

void	SetHorizontalAlign (int align)

void	SetVerticalAlign (int align)

void	SetPageSpacing (int horiz_col_space, int vert_col_space, int horiz_pad, int vert_pad)

void	Destroy ()

void	SetDevicePixelDensity (double dpi, double scale_factor)

Rect	GetScreenRectForAnnot (Annot annot, int page_num=-1)

Annot	GetAnnotationAt (int x, int y, double distanceThreshold, double minimumLineWeight)

void	SetPageViewMode (PageViewMode mode)

PageViewMode	GetPageViewMode () const

void	RefreshAndUpdate (const ViewChangeCollection &view_change)

void	SetPageRefViewMode (PageViewMode mode)

PageViewMode	GetPageRefViewMode () const

void	SetupThumbnails (bool use_embedded, bool generate_at_runtime, bool use_disk_cache, int thumb_max_side_length, size_t max_abs_cache_size, double max_perc_cache_size)

void	ClearThumbCache ()

void	GetThumbAsync (int page_num, ThumbAsyncHandler proc, void *custom_data)

size_t	GetThumbInCacheSize (int page_num)

bool	GetThumbInCache (int page_num, UChar *buf, UInt32 &out_width, UInt32 &out_height)

void	CancelAllThumbRequests ()

void	SetRequestRenderInWorkerThreadProc (RequestRenderInWorkerThreadProc proc, void *custom_data)

void	SetFindTextHandler (PDFView::FindTextHandler proc, void *custom_data)

void	FindTextAsync (const UString &search_str, bool match_case, bool match_whole_word, bool search_up, bool reg_exp)

std::vector< Annot >	GetAnnotationsOnPage (int page_num)

std::vector< Annot >	GetAnnotationListAt (int x1, int y1, int x2, int y2)

void	EnableUndoRedo ()

UString	Undo ()

UString	Redo ()

void	TakeSnapshot (const UString &meta_info)

UString	GetNextUndoInfo ()

UString	GetNextRedoInfo ()

bool	CanUndo ()

bool	CanRedo ()

void	RevertAllChanges ()

ExternalAnnotManager	GetExternalAnnotManager (const UString &author, ExternalAnnotManager::Mode mode=ExternalAnnotManager::e_admin_undo_own)

Static Public Member Functions
static void	SetViewerCache (SDF::SDFDoc &document, size_t max_cache_size, bool on_disk)

Detailed Description

PDFView is a utility class that can be used for interactive rendering of PDF documents.

In .NET environment PDFView is derived from System.Windows.Forms.Control and it can be used like a regular form (see PDFViewForm.cs in PDFView sample for C# for a concrete example).

PDFView implements some essential features such as double-buffering, multi-threaded rendering, scrolling, zooming, and page navigation that are essential in interactive rendering applications (e.g. in client PDF viewing and editing applications).

PDFView defines several coordinate spaces and it is important to understand their differences:

Page Space refers to the space in which a PDF page is defined. It is determined by a page itself and the origin is at the lower-left corner of the page. Note that Page Space is independent of how a page is viewed in PDFView and each page has its own Page space.
Canvas Space refers to the tightest axis-aligned bounding box of all the pages given the current page presentation mode in PDFView. For example, if the page presentation mode is e_single_continuous, all the pages are arranged vertically with one page in each row, and therefore the Canvas Space is rectangle with possibly large height value. For this reason, Canvas Space is also, like Page Space, independent of the zoom factor. Also note that since PDFView adds gaps between adjacent pages, the Canvas Space is larger than the space occupied by all the pages. The origin of the Canvas Space is located at the upper-left corner.
Screen Space (or Client Space) is the space occupied by PDFView and its origin is at the upper-left corner. Note that the virtual size of this space can extend beyond the visible region.
Scrollable Space is the virtual space within which PDFView can scroll. It is determined by the Canvas Space and the current zoom factor. Roughly speaking, the dimensions of the Scrollable Space is the dimensions of the Canvas Space timed by the zoom. Therefore, a large zoom factor will result in a larger Scrollable region given the same Canvas region. For this reason, Scrollable Space might also be referred to as Zoomed Canvas Space. Note that since PDFView adds gaps between pages in Canvas Space and these gaps are not scaled when rendered, the scrollable range is not exactly what the zoom factor times the Canvas range. For functions such as SetHScrollPos(), SetVScrollPos(), GetCanvasHeight(), and GetCanvasWidth(), it is the Scrollable Space that is involved.

Note: PDFView is available on all platforms supported by PDFNet.

Definition at line 72 of file PDFView.h.

Member Typedef Documentation

typedef void(* pdftron::PDF::PDFView::CurrentPageProc)(int current_page, int num_pages, void *data)

A prototype for a callback function (or a delegate in .NET terminology) that will be called whenever current page number changes.

Parameters

current_page	the current page.
num_pages	total number of pages in the document.
data	Custom data to be passed as a second parameter to 'curr_pagenum_proc'.

Definition at line 503 of file PDFView.h.

typedef void(* pdftron::PDF::PDFView::CurrentZoomProc)(double curr_zoom_proc, void *data)

A prototype for a callback function (or a delegate in .NET terminology) that will be called whenever current zoom (magnification) number changes.

Parameters

current_zoom	the current zoom.
data	Custom data to be passed as a second parameter to 'curr_zoom_proc'.

Definition at line 550 of file PDFView.h.

typedef void(* pdftron::PDF::PDFView::FindTextHandler)(bool success, PDF::Selection selection, void *custom_data)

FindTextHandler A type of callback function (or a delegate in .NET terminology) that is called once FindTextAsync is completed.

Definition at line 1477 of file PDFView.h.

typedef void(* pdftron::PDF::PDFView::JavaScriptEventProc)(const char *event_type, const char *json, void *data)

A prototype for a callback function (or a delegate in .NET terminology) for JavaScript action. Can be used to handle alert event which pops up a window with alert message.

Parameters

event_type	such as 'alert'
json	contains event data
data	user defined data

Definition at line 528 of file PDFView.h.

typedef void(* pdftron::PDF::PDFView::RenderBeginEventProc)(void *data)

Declaration for the callback function that will be called just before PDFView starts rendering.

Parameters

data	Custom data to be passed as a parameter to 'proc'.

Definition at line 958 of file PDFView.h.

typedef void(* pdftron::PDF::PDFView::RenderFinishEventProc)(void *data, bool canceled)

Declaration for the callback function that will be called after PDFView is done with rendering.

Parameters

data	Custom data to be passed as a parameter to 'proc'.
canceled	- this parameter is false if PDFView successfully completed the rendering, or is true if the rendering was canceled.

Note: this callback is available only in the C++ SDK and not available in pre-packaged PDF viewing controls (.NET/Java/ActiveX).

Definition at line 971 of file PDFView.h.

typedef void(* pdftron::PDF::PDFView::RequestRenderInWorkerThreadProc)(void *custom_data)

A type of callback function that is called from a secondary thread to issue a rendering request on the UI thread.

Definition at line 1456 of file PDFView.h.

typedef void(* pdftron::PDF::PDFView::ThumbAsyncHandler)(int page_num, bool was_thumb_found, const char *thumb_buf, int thumb_width, int thumb_height, void *custom_data)

Declaration for the callback function that will be called after GetThumbAsync retrieves a thumbnail from the on-disk thumbnail cache.

Parameters

page_num	The page number of the thumbnail.
was_thumb_found	A boolean value which is true if the thumbnail could be retrieved from the persistent cache, and false otherwise.
thumb_buf	A pointer to the thumbnail image. This buffer's size, in bytes, is equal to thumb_width * thumb_height * 4.
thumb_width	The width, in pixels, of the thumbnail image.
thumb_height	The height, in pixels, of the thumbnail image.
custom_data	Custom data passed into GetThumbAsync.

Definition at line 1408 of file PDFView.h.

Member Enumeration Documentation

enum pdftron::PDF::PDFView::PagePresentationMode

PagePresentationMode lists common modes of presenting PDF pages.

Enumerator
e_single_page
e_single_continuous
e_facing
e_facing_continuous
e_facing_cover
e_facing_continuous_cover

Definition at line 156 of file PDFView.h.

enum pdftron::PDF::PDFView::PageViewMode

PageViewMode lists common modes of viewing PDF pages. PDFView currently supports the following viewing modes:

e_fit_page - page zoom is automatically adjusted so that entire page fits into available space.
e_fit_width - page zoom is automatically adjusted so that page width fits into available space.
e_fit_height - page zoom is automatically adjusted so that page height fits into available space.
e_zoom - page is zoomed. The zoom ratio is specified using SetZoom() function.
PVM_SIZE - the size of the enum, should always stay as the last element

Enumerator
e_fit_page
e_fit_width
e_fit_height
e_zoom
PVM_SIZE

Definition at line 1327 of file PDFView.h.

enum pdftron::PDF::PDFView::TextSelectionMode

TextSelectionMode lists different text selection modes that can be used to highlight text. PDFView currently supports the following text selection modes:

e_structural - Selects text based on the logical structure of the page. This type of selection is similar to HTML like selection in web-browsers.
e_rectangular - Selects all words that intersect the given selection rectangle.
e_structural_algorithm_2 - Similar to e_structural but use different algorithm when the start point is not inside a block (not being too smart).

Enumerator
e_structural
e_rectangular
e_structural_algorithm_2

Definition at line 1017 of file PDFView.h.

Constructor & Destructor Documentation

pdftron::PDF::PDFView::PDFView ( )

PDFView constructor and destructor. Create PDFView without associating it to any document.

pdftron::PDF::PDFView::~PDFView ( )

Member Function Documentation

void pdftron::PDF::PDFView::CancelAllThumbRequests ( )

void pdftron::PDF::PDFView::CancelFindText ( )

Cancel the text search thread if FindText() is started in a different thread. Note that if the text search thread is currently being suspended by the render thread, it will only be canceled after it is awaken by the render thread.

void pdftron::PDF::PDFView::CancelRendering ( )

Cancels rendering in progress. If PDFView is not busy rendering the page, the function has no side effects.

bool pdftron::PDF::PDFView::CanRedo ( )

bool pdftron::PDF::PDFView::CanUndo ( )

void pdftron::PDF::PDFView::ClearSelection ( )

Remove any text selection.

void pdftron::PDF::PDFView::ClearThumbCache ( )

Remove all thumbnails from the persistent disk cache.

void pdftron::PDF::PDFView::CloseDoc ( )

Close the associated PDF document.

Point pdftron::PDF::PDFView::ConvCanvasPtToPagePt	(	const Point &	pt,
		int	page_num = `-1`
	)		const

Converts a point expressed in canvas space to a point in a page space.

Parameters

page_num the page number for the page used as the origin of the destination coordinate system. Negative values are used to represent the current page. Pages are indexed starting from one.

void pdftron::PDF::PDFView::ConvCanvasPtToPagePt	(	double &	x,
		double &	y,
		int	page_num = `-1`
	)		const

Point pdftron::PDF::PDFView::ConvCanvasPtToScreenPt ( const Point & pt ) const

Converts a point expressed in canvas space to a point in screen space.

void pdftron::PDF::PDFView::ConvCanvasPtToScreenPt	(	double &	x,
		double &	y
	)		const

Point pdftron::PDF::PDFView::ConvPagePtToCanvasPt	(	const Point &	pt,
		int	page_num = `-1`
	)		const

Converts a point from a page space to point in canvas space.

Parameters

page_num the page number for the page used as the origin of the destination coordinate system. Negative values are used to represent the current page. Pages are indexed starting from one.

void pdftron::PDF::PDFView::ConvPagePtToCanvasPt	(	double &	x,
		double &	y,
		int	page_num = `-1`
	)		const

Point pdftron::PDF::PDFView::ConvPagePtToScreenPt	(	const Point &	pt,
		int	page_num = `-1`
	)		const

Converts a point in a page space to a point in the screen space. If PDFView is in a non-continous page view mode, and the page is not visible, the result is undefined.

Parameters

page_num the page number for the page used as the origin of the destination coordinate system. Negative values are used to represent the current page. Pages are indexed starting from one.

void pdftron::PDF::PDFView::ConvPagePtToScreenPt	(	double &	x,
		double &	y,
		int	page_num = `-1`
	)		const

Point pdftron::PDF::PDFView::ConvScreenPtToCanvasPt ( const Point & pt ) const

Converts a point expressed in screen space to a point in canvas space.

void pdftron::PDF::PDFView::ConvScreenPtToCanvasPt	(	double &	x,
		double &	y
	)		const

Point pdftron::PDF::PDFView::ConvScreenPtToPagePt	(	const Point &	pt,
		int	page_num = `-1`
	)		const

Converts a point expressed in screen space to a point in a page space.

Parameters

page_num the page number for the page used as the origin of the destination coordinate system. Negative values are used to represent the current page. Pages are indexed starting from one.

void pdftron::PDF::PDFView::ConvScreenPtToPagePt	(	double &	x,
		double &	y,
		int	page_num = `-1`
	)		const

void pdftron::PDF::PDFView::Destroy ( )

Frees the native memory of the object.

void pdftron::PDF::PDFView::DocLock ( bool cancel_threads )

Acquires a write lock on the currently open document, optionally canceling all threads accessing the document.

void pdftron::PDF::PDFView::DocLockRead ( )

Locks the currently open document to prevent competing write threads (using Lock()) from accessing the document at the same time. Other reader threads however, will be allowed to access the document. Threads attempting to obtain write access to the document will wait in suspended state until the thread that owns the lock calls doc.UnlockRead(). Note: To avoid deadlocks obtaining a write lock while holding a read lock is not permitted and will throw an exception. If this situation is encountered please either unlock the read lock before the write lock is obtained or acquire a write lock (rather than read lock) in the first place.

bool pdftron::PDF::PDFView::DocTryLock ( int milliseconds = 0 )

Try acquiring a write lock on the currently open document, waiting no longer than specified number of milliseconds.

Returns: true if the document is locked for multi-threaded access, false otherwise.

bool pdftron::PDF::PDFView::DocTryLockRead ( int milliseconds = 0 )

Try acquiring a read lock on the current document, waiting no longer than specified number of milliseconds.

Returns: true if the document is locked for multi-threaded access, false otherwise.

void pdftron::PDF::PDFView::DocUnlock ( )

Releases the write lock from the currently open document.

void pdftron::PDF::PDFView::DocUnlockRead ( )

Releases the read lock from the currently open document.

void pdftron::PDF::PDFView::EnableUndoRedo ( )

void pdftron::PDF::PDFView::ExecuteAction ( Action & action )

Requests action object to be executed by PDFViewCtrl. Action must belong to the document currently displayed in PDFViewCtrl.

Parameters

action object that is to be executed.

void pdftron::PDF::PDFView::ExecuteAction ( ActionParameter & action_param )

void pdftron::PDF::PDFView::FindTextAsync	(	const UString &	search_str,
		bool	match_case,
		bool	match_whole_word,
		bool	search_up,
		bool	reg_exp
	)

Searches for the provided search string in the documents in a secondary thread, and calls FindTextHandler with the resulting selection.

Parameters

search_str	The string to search for in the document
match_case	Set to true for case-sensitive search
match_whole_word	Set to true to match whole words only
search_up	Set to true to search up through the document
reg_exp	Set to true to interpret search_str as a regular expression

Annot pdftron::PDF::PDFView::GetAnnotationAt	(	int	x,
		int	y,
		double	distanceThreshold,
		double	minimumLineWeight
	)

Gets the annotation at the (x, y) position expressed in screen coordinates

Parameters

x	x coordinate of the screen point
y	y coordinate of the screen point
distanceThreshold	Maximum distance from the point (x, y) to the annotation for the annot to be considered a hit.
minimumLineWeight	For very thin lines, it is almost impossible to hit the actual line. This specifies a minimum line thickness (in screen coordinates) for the purpose of calculating whether a point is inside the annotation or not.

Returns: the annotation at (x, y). If there is no annotation at (x, y), the returned annotation's IsValid method will return false.

std::vector<Annot> pdftron::PDF::PDFView::GetAnnotationListAt	(	int	x1,
		int	y1,
		int	x2,
		int	y2
	)

Returns a vector of annotations under the line (x1, y1, x2, y2) expressed in screen coordinates. Does not include form field annotations.

Parameters

x1	The x-coordinate of the first point of the line.
y1	The y-coordinate of the first point of the line.
x2	The x-coordinate of the second point of the line.
y2	The y-coordinate of the second point of the line.

Returns: A vector of annotations under the line (x1, y1, x2, y2) expressed in screen coordinates.

std::vector<Annot> pdftron::PDF::PDFView::GetAnnotationsOnPage ( int page_num )

Returns a vector of all of the annotations on the given page.

Parameters

page_num The page number for which to retrieve annotations.

Returns: A vector of all of the annotations on the given page.

Annot::Type pdftron::PDF::PDFView::GetAnnotTypeUnder	(	double	x,
		double	y
	)

Returns: annotation type at the given point

Parameters

x	- x coordinate of the input point
y	- y coordinate in the input point

const char* pdftron::PDF::PDFView::GetBuffer ( ) const

Returns the pointer to the internal memory buffer containing the rasterized image of the given page. The buffer size is at least 'GetBufferHeight*GetBufferStride' bytes. The pixel data is stored in 8 bit per component, BGRA format.

int pdftron::PDF::PDFView::GetBufferHeight ( ) const

Returns the width of the rendering buffer in pixels.

Note: this method is typically used only in PDFNet for C++

int pdftron::PDF::PDFView::GetBufferStride ( ) const

Returns the stride of the rendering buffer in pixels.

Note: this method is typically used only in PDFNet for C++

int pdftron::PDF::PDFView::GetBufferWidth ( ) const

Returns the width of the rendering buffer in pixels.

Note: this method is typically used only in PDFNet for C++

double pdftron::PDF::PDFView::GetCanvasHeight ( ) const

Returns the height of the scrollable space.

double pdftron::PDF::PDFView::GetCanvasWidth ( ) const

Returns the width of the scrollable space.

PDFRasterizer::ColorPostProcessMode pdftron::PDF::PDFView::GetColorPostProcessMode ( ) const

Returns: the current color post processing mode.

int pdftron::PDF::PDFView::GetCurrentPage ( ) const

Returns: the current page displayed in the view.

Common::Matrix2D pdftron::PDF::PDFView::GetDeviceTransform ( int page_num = -1 ) const

Returns: the device transformation matrix. The device transformation matrix maps the page coordinate system to screen (or device) coordinate system.

Parameters

page_num same as for PDFView.Conv???() methods.

Note: to obtain a transformation matrix that maps screen coordinates to page coordinates, you can invert the device matrix. For example:
* Common::Matrix2D scr2page(pdfview.GetDeviceTransform());

* scr2page.Inverse();

*

PDFDoc* pdftron::PDF::PDFView::GetDoc ( )

Returns: Currently associated document with this PDFView.

ExternalAnnotManager pdftron::PDF::PDFView::GetExternalAnnotManager	(	const UString &	author,
		ExternalAnnotManager::Mode	mode = `ExternalAnnotManager::e_admin_undo_own`
	)

double pdftron::PDF::PDFView::GetHScrollPos ( ) const

Returns: the current horizontal scroll position in the scrollable space.

LinkInfo pdftron::PDF::PDFView::GetLinkAt	(	int	x,
		int	y
	)

Gets the link info at a given point, specified in client space.

Parameters

x	the x position in client space
y	the y position in client space

Returns: the LinkInfo object with the link information or null if no link is found in the queried location.

Note: To get valid links, SetUrlExtraction(boolean) must be set to true before opening the document.

UString pdftron::PDF::PDFView::GetNextRedoInfo ( )

UString pdftron::PDF::PDFView::GetNextUndoInfo ( )

OCG::Context pdftron::PDF::PDFView::GetOCGContext ( )

Returns: the Optional Content Group (OCG) context associated with this PDFView, or NULL (i.e. context.IsValid()==false) if there is no OCG context associated with the view. If an OCG context associated with the view, optional content (such as PDF layers) will be selectively rendered based on the states of optional content groups in the given context.

int pdftron::PDF::PDFView::GetPageCount ( ) const

Returns: the total number of pages in the document.

int pdftron::PDF::PDFView::GetPageNumberFromScreenPt	(	double	x,
		double	y
	)		const

Returns: the number of the page located under the given screen coordinate. The positive number indicates a valid page, whereas number less than 1 means that no page was found.

PagePresentationMode pdftron::PDF::PDFView::GetPagePresentationMode ( ) const

Returns: the current page presentation mode.

PageViewMode pdftron::PDF::PDFView::GetPageRefViewMode ( ) const

Gets the reference page view mode. See more details about reference page view mode in setPageRefViewMode(int).

PageViewMode pdftron::PDF::PDFView::GetPageViewMode ( ) const

Returns: the current page viewing mode

ColorPt pdftron::PDF::PDFView::GetPostProcessedColor ( const ColorPt & color ) const

Converts a color based on the view's color post processing transformation.

Parameters

color the color to be converted

Returns: the post-processed color

bool pdftron::PDF::PDFView::GetRightToLeftLanguage ( ) const

Returns the current right-to-left language mode for structural selection.

Returns: true if the current language mode is right-to-left.

Page::Rotate pdftron::PDF::PDFView::GetRotation ( ) const

Returns: The current rotation of this PDFView.

Rect pdftron::PDF::PDFView::GetScreenRectForAnnot	(	Annot	annot,
		int	page_num = `-1`
	)

Gets the annotation bounding box in screen points

Parameters

annot	target annotation
page_num	the page number that the annotation is on S

Returns: the annotation bounding box in screen points

Selection pdftron::PDF::PDFView::GetSelection ( int pagenum = -1 ) const

Returns: Current text selection for a given page

int pdftron::PDF::PDFView::GetSelectionBeginPage ( ) const

Returns: the first page number that has text selection on it. Useful when there are selections on multiple pages at the same time.

int pdftron::PDF::PDFView::GetSelectionEndPage ( ) const

Returns: the last page number that has text selection on it. Useful when there are selections on multiple pages at the same time.

TextSelectionMode pdftron::PDF::PDFView::GetTextSelectionMode ( ) const

Returns: the current selection mode used for text highlighting.

void pdftron::PDF::PDFView::GetThumbAsync	(	int	page_num,
		ThumbAsyncHandler	proc,
		void *	custom_data
	)

Retrieves the specified thumbnail from the persistent thumbnail cache on disk, then calling proc on the resulting thumbnail.

Parameters

page_num	The page number of the thumbnail.
proc	A callback function that will be called after the thumbnail is retrieved, or if that retrieval fails.
data	Custom data to be passed as a parameter to 'proc'.

bool pdftron::PDF::PDFView::GetThumbInCache	(	int	page_num,
		UChar *	buf,
		UInt32 &	out_width,
		UInt32 &	out_height
	)

Retrieves the specified thumbnail from the persistent thumbnail cache on disk if it is available.

Parameters

page_num	The page number of the thumbnail.
buf	the buffer in which to store thumbnail data. This buffer should have space for GetThumbInCacheSize bytes.
out_width	the width of the thumbnail
out_height	the height of the thumbnail

Returns: true if the thumbnail is found in the cache and false otherwise.

size_t pdftron::PDF::PDFView::GetThumbInCacheSize ( int page_num )

Gets the data size of a cached thumbnail.

Parameters

page_num The page number of the thumbnail.

Returns: if the thumbnail is available returns the size of the thumbnail in bytes otherwise returns 0

std::vector<int> pdftron::PDF::PDFView::GetVisiblePages ( ) const

Get a vector with the pages currently visible on the screen.

Returns: a vector of the pages currently visible on the screen.

double pdftron::PDF::PDFView::GetVScrollPos ( ) const

Returns: the current vertical scroll position in the scrollable space.

double pdftron::PDF::PDFView::GetZoom ( ) const

Returns the current zoom factor.

Returns: current zoom (or scaling) component used to display the page content.

bool pdftron::PDF::PDFView::GotoFirstPage ( )

Sets the current page to the first page in the document.

Returns: true if successful, false otherwise.

bool pdftron::PDF::PDFView::GotoLastPage ( )

Sets the current page to the last page in the document.

Returns: true if successful, false otherwise.

bool pdftron::PDF::PDFView::GotoNextPage ( )

Sets the current page to the next page in the document.

Returns: true if successful, false otherwise.

bool pdftron::PDF::PDFView::GotoPreviousPage ( )

Sets the current page to the previous page in the document.

Returns: true if successful, false otherwise.

bool pdftron::PDF::PDFView::HasSelection ( ) const

Returns: return true if there is selection, false otherwise.

bool pdftron::PDF::PDFView::HasSelectionOnPage ( int ipage ) const

Returns: returns true if given page number has any text selection on it. Useful when there are selections on multiple pages at the same time.

void pdftron::PDF::PDFView::HideAnnotation ( Annot annot )

Disable rendering of a particular annotation. This does not change the annotation itself, just how it is displayed in this viewer instance.

Parameters

annot The annotation object to cease drawing for.

bool pdftron::PDF::PDFView::IsFinishedRendering ( bool visible_region_only ) const

Parameters

visible_region_only - Specifies if the method refers only to currently visible content.

Returns: true is the rendering thread finished rendering the view, false if the rendering is still in progress.

bool pdftron::PDF::PDFView::IsThereTextInRect	(	double	x1,
		double	y1,
		double	x2,
		double	y2
	)		const

Returns: true if there is a text in the given rectangle, false otherwise and point (x2, y2) is the end selection point. The points are defined in screen space.

void pdftron::PDF::PDFView::OnScroll	(	int	pix_dx,
		int	pix_dy
	)

Scrolls the contents of the rendering buffer 'pix_dx' horizontally and 'pix_dy' vertically.

Parameters

pix_dx	horizontal scroll offset, in pixels
pix_dy	vertical scroll offset, in pixels

void pdftron::PDF::PDFView::OnSize	(	int	width,
		int	height
	)

Resize rendering buffer to new dimensions.

Parameters

width	- The width of the target image in pixels.
height	- The height of the target image in pixels (the number of rows).

Note: this method is typically used only in PDFNet for C++

void pdftron::PDF::PDFView::OpenUniversalDoc ( DocumentConversion & conversion )

Associates this PDFView with a given document conversion. The conversion will be performed page-by-page, asynchronously. The pdview object will be updated to display the conversion result

Parameters

doc	- A document to be displayed in the view.

void pdftron::PDF::PDFView::PrepareAnnotsForMouse	(	int	page_num,
		double	distance_threshold,
		double	minimum_line_weight
	)

Requests for preparing annotations of the given page. Note: Annotations are going to be prepared asynchronously

Parameters

page_num	- page number
distance_threshold	- Maximum distance from the point (x, y) to the annotation for the annot to be considered a hit.
minimum_line_weight	- For very thin lines, it is almost impossible to hit the actual line. This specifies a minimum line thickness (in screen coordinates) for the purpose of calculating whether a point is inside the annotation or not

void pdftron::PDF::PDFView::PrepareWords ( int page_num )

Requests for preparing words of the given page. Note: Words are going to be prepared asynchronously

Parameters

page_num - page number

UString pdftron::PDF::PDFView::Redo ( )

void pdftron::PDF::PDFView::RefreshAndUpdate ( const ViewChangeCollection & view_change )

Helper function that will refresh annotation and/or field appearances if needed, and then render modified page areas, all based on the contents of the view_change parameter.

Parameters

view_change contains all the updated fields and rectangles.

void pdftron::PDF::PDFView::RevertAllChanges ( )

void pdftron::PDF::PDFView::RotateClockwise ( )

Rotates all pages in the document 90 degrees clockwise.

void pdftron::PDF::PDFView::RotateCounterClockwise ( )

Rotates all pages in the document 90 degrees counter-clockwise.

bool pdftron::PDF::PDFView::Select	(	double	x1,
		double	y1,
		double	x2,
		double	y2
	)

Selects text within the given region using the current text selection mode.

Returns: true if some text was selected, false otherwise.

Parameters

x1,y1,x2,y2 - two points (screen coordinates, origin located at the upper-left corner of this view) defining the opposite corners of a selection rectangle.

bool pdftron::PDF::PDFView::Select	(	double	x1,
		double	y1,
		int	page1,
		double	x2,
		double	y2,
		int	page2
	)

Selects texts using structural mode.

Returns: true if some texts were selected, false otherwise.

Parameters

(x1,y1),page1	- the first selection point (in page coordinates space) on page page1
(x2,y2),page2	- the second selection point (in page coordinates space) on page page2

bool pdftron::PDF::PDFView::Select ( const Highlights & highlights )

Selects texts identified by Highlights.

Returns: true if some texts were selected, false otherwise.

Parameters

highlights - an instance of Highlights class.

bool pdftron::PDF::PDFView::Select ( const Selection & select )

Selects a region according to a Selection object

Returns: true if some texts were selected, false otherwise.

Parameters

select - an instance of the Selection class

void pdftron::PDF::PDFView::SelectAll ( )

Selects all text on the page.

bool pdftron::PDF::PDFView::SelectWithSmartSnapping	(	double	x1,
		double	y1,
		double	x2,
		double	y2
	)

Selects text within the given region using the current text selection mode with smart snap-to-start and snap-to-end modes.

Returns: true if some text was selected, false otherwise.

Parameters

x1,y1,x2,y2 - two points (screen coordinates, origin located at the upper-left corner of this view) defining the opposite corners of a selection rectangle.

bool pdftron::PDF::PDFView::SelectWithSmartSnapping	(	double	x1,
		double	y1,
		int	page1,
		double	x2,
		double	y2,
		int	page2
	)

Selects texts using structural mode with smart snap-to-start and snap-to-end modes.

Returns: true if some texts were selected, false otherwise.

Parameters

(x1,y1),page1	- the first selection point (in page coordinates space) on page page1
(x2,y2),page2	- the second selection point (in page coordinates space) on page page2

bool pdftron::PDF::PDFView::SelectWithSnapping	(	double	x1,
		double	y1,
		double	x2,
		double	y2,
		bool	snap_to_start,
		bool	snap_to_end
	)

Selects text within the given region using the current text selection mode with defined snap-to-start and snap-to-end modes.

Returns: true if some text was selected, false otherwise.

Parameters

x1,y1,x2,y2	- two points (screen coordinates, origin located at the upper-left corner of this view) defining the opposite corners of a selection rectangle.
snap_to_start,snap-to-end,:	if selected text should contain the whole word at start/end of selection points.

bool pdftron::PDF::PDFView::SelectWithSnapping	(	double	x1,
		double	y1,
		int	page1,
		double	x2,
		double	y2,
		int	page2,
		bool	snap_to_start,
		bool	snap_to_end
	)

Selects texts using structural mode with defined snap-to-start and snap-to-end modes.

Returns: true if some texts were selected, false otherwise.

Parameters

(x1,y1),page1	- the first selection point (in page coordinates space) on page page1
(x2,y2),page2	- the second selection point (in page coordinates space) on page page2
snap_to_start,snap-to-end,:	if selected text should contain the whole word at start/end of selection points

void pdftron::PDF::PDFView::SetAntiAliasing ( bool enable_aa )

Enable or disable anti-aliasing.

Anti-Aliasing is a technique used to improve the visual quality of images when displaying them on low resolution devices (for example, low DPI computer monitors).

Anti-aliasing is enabled by default.

void pdftron::PDF::PDFView::SetBackgroundColor	(	UInt8	r,
		UInt8	g,
		UInt8	b,
		UInt8	a = `255`
	)

Sets the default background color used to paint the area surrounding each page.

Parameters

r,g,b	- RGB color specifying the default background color.
a	- The alpha value of the background color. Default value is 255.

void pdftron::PDF::PDFView::SetCaching ( bool enabled )

Enables of disables caching of images, fonts, and other resources. Disabling caching can lower memory requirements at the expense of rendering speed.

Parameters

enabled if true caching is enabled, if false caching is disabled. by default caching is enabled

void pdftron::PDF::PDFView::SetColorPostProcessColors	(	unsigned int	white_color,
		unsigned int	black_color
	)

Sets the color post processing transformation. This transform is applied to the rasterized bitmap as the final step in the rasterization process, and is applied directly to the resulting bitmap (disregarding any color space information). Color post processing only supported for RGBA output. This mode will map the brightness of the original rasterized bitmap to a gradient between whiteColor and blackColor

Parameters

white_color	The white color (ARGB) of the page.
black_color	The black color (ARGB) of the page.

void pdftron::PDF::PDFView::SetColorPostProcessMapFile ( Filters::Filter image_file_contents )

Sets the color post processing transformation. This transform is applied to the rasterized bitmap as the final step in the rasterization process, and is applied directly to the resulting bitmap (disregarding any color space information). Color post processing only supported for RGBA output.

This mode will map the brightness of the original rasterized bitmap to a gradient in image_file_contents from left to right.

Parameters

image_file_contents A filter with image file contents.

void pdftron::PDF::PDFView::SetColorPostProcessMode ( PDFRasterizer::ColorPostProcessMode mode )

Set the color post processing transformation. This transform is applied to the rasterized bitmap as the final step in the rasterization process, and is applied directly to the resulting bitmap (disregarding any color space information). Color post processing only supported for RGBA output.

Parameters

mode	is the specific transform to be applied

bool pdftron::PDF::PDFView::SetCurrentPage ( int page_num )

Sets the current page to the given page.

Returns: true if successful, false otherwise.

void pdftron::PDF::PDFView::SetCurrentPageProc	(	CurrentPageProc	curr_pagenum_proc,
		void *	data
	)

Sets the callback function (i.e. a delegate) that is called whenever current page number changes. This can be used to update the current page number within GUI applications etc.

Parameters

curr_pagenum_proc	Callback function (or a delegate in .NET).
data	Custom data to be passed as a second parameter to 'curr_pagenum_proc'.

void pdftron::PDF::PDFView::SetCurrentZoomProc	(	CurrentZoomProc	curr_zoom_proc,
		void *	data
	)

Sets the callback function (i.e. a delegate) that is called whenever current zoom (magnification) changes. This can be used to update the current zoom number within GUI applications etc.

Parameters

curr_zoom_proc	Callback function (or a delegate in .NET).
data	Custom data to be passed as a second parameter to 'curr_zoom_proc'.

void pdftron::PDF::PDFView::SetDefaultPageColor	(	UInt8	r,
		UInt8	g,
		UInt8	b
	)

Sets the default 'paper' color used to draw background of each page.

Parameters

r,g,b - RGB color specifying the default page color.

void pdftron::PDF::PDFView::SetDevicePixelDensity	(	double	dpi,
		double	scale_factor
	)

Set device pixel density

void pdftron::PDF::PDFView::SetDoc ( PDFDoc & doc )

Associates this PDFView with a given PDF document.

Parameters

doc	- A document to be displayed in the view.

void pdftron::PDF::PDFView::SetDrawAnnotations ( bool render_annots )

Enable or disable annotation and forms rendering. By default, all annotations and form fields are rendered.

Parameters

render_annots True to draw annotations, false otherwise.

void pdftron::PDF::PDFView::SetErrorReportProc	(	PDFRasterizer::ErrorReportProc	error_proc,
		void *	data
	)

Sets the error handling function to be called in case an error is encountered during page rendering.

Parameters

error_proc	Error handling callback function (or delegate in .NET)
data	Custom data to be passed as a second parameter to 'error_proc'.

void pdftron::PDF::PDFView::SetFieldHighlightColor ( const ColorPt & new_field_highlight_color )

Set the highlight color for required fields

This option only has an effect if field highlighting is turned on using SetHighlightFields(true). Note that signature fields have their own highlight color, independent of this one (see setSignatureHighlightColor).

Parameters

new_field_highlight_color the new highlight color, in rgba form.

void pdftron::PDF::PDFView::SetFindTextHandler	(	PDFView::FindTextHandler	proc,
		void *	custom_data
	)

Sets the FindText handling function to be called once FindTextAsync is done, whether it was interrupted, canceled, or completed.

Parameters

proc	FindText handling callback function (or delegate in .NET)
data	Custom data to be passed as a parameter to 'proc'.

void pdftron::PDF::PDFView::SetGamma ( double exp )

Sets the gamma factor used for anti-aliased rendering.

Parameters

exp	is the exponent value of gamma function. Typical values are in the range from 0.1 to 3.

Gamma correction can be used to improve the quality of anti-aliased image output and can (to some extent) decrease the appearance common anti-aliasing artifacts (such as pixel width lines between polygons).

Note: Gamma correction is used only in the built-in rasterizer.

void pdftron::PDF::PDFView::SetHighlightFields ( bool highlight_fields )

Enable or disable highlighting form fields. Default is disabled.

Parameters

highlight_fields true to highlight, false otherwise.

void pdftron::PDF::PDFView::SetHorizontalAlign ( int align )

Sets the horizontal alignment used for rendering pages within the view.

Parameters

align an integer specifying the horizontal alignment. Depending of whether align is positive, negative, or zero - pages will be right, left or center aligned: align<0 -> pages are left aligned. align==0 -> pages are centered. align>0 -> pages are right aligned.

void pdftron::PDF::PDFView::SetHScrollPos ( double pos )

Sets the horizontal scroll position in scrollable space.

Parameters

the	new horizontal scroll position. The position should be in the range between 0 and GetCanvasWidth().

void pdftron::PDF::PDFView::SetImageSmoothing ( bool smoothing_enabled = true )

Enable or disable image smoothing.

The rasterizer allows a trade-off between rendering quality and rendering speed. This function can be used to indicate the preference between rendering speed and quality.

Note: image smoothing option has effect only if the source image has higher resolution that the output resolution of the image on the rasterized page. PDFNet automatically controls at what resolution/zoom factor, 'image smoothing' needs to take effect.

Parameters

smoothing_enabled True to enable image smoothing, false otherwise. image smoothing is enabled.

void pdftron::PDF::PDFView::SetJavaScriptEventCallBack	(	JavaScriptEventProc	js_proc,
		void *	data
	)

Sets the callback function (i.e. a delegate) for JavaScript action. Can be used to handle alert event which pops up a window with alert message.

Parameters

js_proc	Callback function (or a delegate in .NET).
data	user defined data

void pdftron::PDF::PDFView::SetOCGContext ( const OCG::Context & ctx )

Sets the Optional Content Group (OCG) context that should be used when viewing the document. This function can be used to change the current OCG context. Optional content (such as PDF layers) will be selectively rendered based on the states of optional content groups in the given context.

Parameters

ctx	Optional Content Group (OCG) context, or NULL if the rasterizer should render all content on the page.

Note: Unlike PDFDraw.SetOCGContext() this method copies the given context. As a result, in order to modify the state of OCG groups in the current context use GetOCGContext() to obtain the currently selected content and then modify states.

void pdftron::PDF::PDFView::SetOverprint ( PDFRasterizer::OverprintPreviewMode op )

Enable or disable support for overprint and overprint simulation. Overprint is a device dependent feature and the results will vary depending on the output color space and supported colorants (i.e. CMYK, CMYK+spot, RGB, etc).

By default overprint is only enabled for PDF/X files.

Parameters

op	e_op_on: always enabled; e_op_off: always disabled; e_op_pdfx_on: enabled for PDF/X files only.

void pdftron::PDF::PDFView::SetPageBorderVisibility ( bool border_visible )

Enables or disables drawing of a thin border around each page.

Parameters

border_visible - if true, the border will be visible.

void pdftron::PDF::PDFView::SetPagePresentationMode ( PagePresentationMode mode )

Sets the current page presentation mode.

Parameters

mode	- the new page presentation mode. The default PagePresentationMode is e_single_continuous.

void pdftron::PDF::PDFView::SetPageRefViewMode ( PageViewMode mode )

Sets the reference page view mode. In a non-continous page presentation mode, the reference page view mode is used to determine the page view mode upon a page change event. For example, if the reference page view mode is set to e_fit_width, the new page coming in will be displayed with width-fit mode.

Parameters

mode	The reference page view mode to set. Valid values are e_fit_page, e_fit_width, and e_fit_height.

void pdftron::PDF::PDFView::SetPageSpacing	(	int	horiz_col_space,
		int	vert_col_space,
		int	horiz_pad,
		int	vert_pad
	)

Sets the vertical and horizontal padding and column spacing between adjacent pages in the view.

Parameters

horiz_col_space	horizontal column spacing (represented in pixels) between adjacent pages in the view. Default is 10.
vert_col_space	vertical column spacing (represented in pixels) between adjacent pages in the view. Default is 10.
horiz_pad	horizontal padding (represented in pixels) on the left and right side of the view. Default is 10.
vert_pad	vertical padding (represented in pixels) on the top and bottom side of the view. Default is 10.

void pdftron::PDF::PDFView::SetPageTransparencyGrid ( bool trans_grid_visible )

Enables or disables the transparency grid (check board pattern) to reflect page transparency.

Parameters

trans_grid_visible - if true, the grid is turned on.

void pdftron::PDF::PDFView::SetPageViewMode ( PageViewMode mode )

Sets the page viewing mode

Parameters

mode	- the new page viewing mode. The default PageView mode is e_fit_width.

void pdftron::PDF::PDFView::SetPathHinting ( bool enable_hinting )

Enable or disable path hinting.

Parameters

enable_hinting if true path hinting is enabled. Path hinting is used to slightly adjust paths in order to avoid or alleviate artifacts of hair line cracks between certain graphical elements. This option is turned on by default.

void pdftron::PDF::PDFView::SetRasterizerType ( PDFRasterizer::Type type )

Sets the core graphics library used for rasterization and rendering. Using this method it is possible to quickly switch between different implementations. By default, PDFNet uses a built-in, high-quality, and platform independent rasterizer.

Parameters

type	Rasterizer type.

void pdftron::PDF::PDFView::SetRenderBeginProc	(	RenderBeginEventProc	proc,
		void *	data
	)

Set a callback function that can be used to notify the client that PDFView is about to start rendering and modifying the contents of the rendering buffer.

Parameters

proc	A callback function that will be called just before PDFView starts rendering.
data	Custom data to be passed as a parameter to 'proc'.

Note: this method is available only in the C++ SDK and not available in pre-packaged PDF viewing controls (.NET/Java/ActiveX).

void pdftron::PDF::PDFView::SetRenderFinishProc	(	RenderFinishEventProc	proc,
		void *	data
	)

Set a callback function that can be used to notify the client that PDFView finished rendering and modifying the contents of the rendering buffer.

Parameters

proc	A callback function that will be called after PDFView is done with rendering.
data	Custom data to be passed as a parameter to 'proc'.

Note: this method is available only in the C++ SDK and is not available in pre-packaged PDF viewing controls (.NET/Java/ActiveX).

void pdftron::PDF::PDFView::SetRequestRenderInWorkerThreadProc	(	RequestRenderInWorkerThreadProc	proc,
		void *	custom_data
	)

Sets a callback for issuing a render request on the UI thread. The callback will be called from a secondary thread. The called code is responsible for dispatching an event to the UI thread using the relevant mechanism.

Parameters

proc	The callback.
data	Custom data to be passed as a parameter to 'proc'.

void pdftron::PDF::PDFView::SetRequiredFieldBorderColor ( const ColorPt & new_border_color )

Set the border color for required fields

This option only has an effect if field highlighting is turned on using SetHighlightFields(true).

Parameters

new_border_color the new border color, in rgba form.

void pdftron::PDF::PDFView::SetRightToLeftLanguage ( bool flag )

Sets structural selection to work in right-to-left language mode.

Parameters

flag	Set to true if the language is right to left.

void pdftron::PDF::PDFView::SetSignatureHighlightColor ( const ColorPt & new_signature_highlight_color )

Set the highlight color for signature fields

This option only has an effect if field highlighting is turned on using SetHighlightFields(true). Note that non-signature fields have their own highlight color, independent of this one (see setFieldHighlightColor)

Parameters

new_signature_highlight_color the new signature highlight color, in rgba form.

void pdftron::PDF::PDFView::SetSnappingMode ( UInt32 mode_flags )

Set the point snapping mode for the SnapToNearestInDoc method. By default SnapToNearestInDoc will snap to line endpoints, midpoints, and intersections.

Parameters

mode_flag a bitwise combination of the members of GeometryCollection::SnappingMode

void pdftron::PDF::PDFView::SetTextSelectionMode ( TextSelectionMode tm )

Sets the selection mode used for text highlighting.

Parameters

tm	the text selection mode.

void pdftron::PDF::PDFView::SetThinLineAdjustment	(	bool	pixel_grid_fit,
		bool	stroke_adjust
	)

Set thin line adjustment parameters.

Parameters

pixel_grid_fit	if true (horizontal/vertical) thin lines will be snapped to integer pixel positions. This helps make thin lines look sharper and clearer. This option is turned off by default and it only works if path hinting is enabled.
stroke_adjust	if true auto stroke adjustment is enabled. Currently, this would make lines with sub-pixel width to be one-pixel wide. This option is turned on by default.

void pdftron::PDF::PDFView::SetupThumbnails	(	bool	use_embedded,
		bool	generate_at_runtime,
		bool	use_disk_cache,
		int	thumb_max_side_length,
		size_t	max_abs_cache_size,
		double	max_perc_cache_size
	)

Specify the different thumbnail settings for the viewer. It is recommended that this not be called after SetDoc in order to avoid clearing cached thumbnails. Calling this method with different parameters will also clear the persistent disk cache if it is in use.

Parameters

use_embedded	Enables or disables using thumbnails embedded in the PDF document as a preview of the rendered page. (Currently ignored - future versions may take advantage of embedded thumbnails)
generate_at_runtime	Enables or disables generating thumbnails at runtime.
use_disk_cache	Enables or disables caching thumbnails on disk. If possible thumbnails are cached in a persistent manner.
thumb_max_side_length	The maximum size, in pixels, of a dimension of generated thumbnails.
max_abs_cache_size	The absolute maximum size on disk, in bytes, for the temporary thumbnail cache.
max_perc_cache_size	The maximum percentage of free disk space, in the range 0 - 1.0, that the cache can take up.

void pdftron::PDF::PDFView::SetUrlExtraction ( bool enabled )

Enables or disables URL extraction.

Parameters

enabled if true URL extraction is enabled, if false URL extraction is disabled.

by default URL extraction is disabled

Note: If set to enabled when the document is already opened, it may not find links on pages that were already rendered. It is suggested to set this flag before opening the document.

void pdftron::PDF::PDFView::SetVerticalAlign ( int align )

Sets the vertical alignment used for rendering pages within the view.

Parameters

align an integer specifying the vertical alignment. Depending of whether align is positive, negative, or zero - pages will be bottom, top or center aligned: align<0 -> pages are top aligned. align==0 -> pages are centered. align>0 -> pages are bottom aligned.

static void pdftron::PDF::PDFView::SetViewerCache	(	SDF::SDFDoc &	document,
		size_t	max_cache_size,
		bool	on_disk
	)

static

Sets the cache parameters of the page cache on disk (which caches content streams and mipmapped images) for this specific document. These parameters will override the default cache parameters. Note that if this function is called after the document has been rasterized, it has no effect.

Parameters

document	- The document whose settings will be modified.
max_cache_size	- The maximum size, in bytes, of the entire document's page cache. Set to zero to disable the viewer cache.
on_disk	- If set to 'true', cache will be stored on the local filesystem. If set to 'false', cache will be stored in heap memory.

Desktop: max_cache_size = 512 MB, on_disk = true | Mobile: max_cache_size = 100 MB, on_disk = false

void pdftron::PDF::PDFView::SetVScrollPos ( double pos )

Sets the vertical scroll position in scrollable space.

Parameters

the	new vertical scroll position. The position should be in the range between 0 and GetCanvasheight().

Should you want to center to a location (px, py) expressed in a page space, you can use the following code:

//focus 
view.SetCurrentPage(page_num);
view.ConvPagePtToScreenPt(px, py, page_num);
view.SetZoom((int)px, (int)py, view.GetZoom());

//center
int width = view.GetBufferWidth();
int height = view.GetBufferHeight();
int dx = (int)(px - (double)width/2 + 0.5);
int dy = (int)(py - (double)height/2 + 0.5);
view.OnScroll(dx, dy);

bool pdftron::PDF::PDFView::SetZoom ( double zoom )

Sets the zoom factor to a new value. The function zooms to a point at the center of the rendering buffer.

Parameters

zoom	- new scaling component used to display the page content.

Returns: true if successful, false otherwise.

bool pdftron::PDF::PDFView::SetZoom	(	int	x,
		int	y,
		double	zoom
	)

Sets the zoom factor to a new value using the given pixel coordinate (x,y) as a zoom center, which will stay fixed on the screen.

The zoom point (x,y) is represented in the screen space, which starts in the upper-left corner of the client window.

Should you want to move (x, y) to the center of the client window, you can use the OnScroll() subsequently:

int x, y;
double zoom;
...
view.SetZoom(x, y, zoom);
int width = view.GetBufferWidth();
int height = view.GetBufferHeight();
int dx = (int)(x - (double)width/2 + 0.5);
int dy = (int)(y - (double)height/2 + 0.5);
view.OnScroll(dx, dy);

Parameters

x	- the horizontal coordinate to zoom in.
y	- the vertical coordinate to zoom in.
zoom	- new scaling component used to display the page content.

Returns: true if successful, false otherwise.

void pdftron::PDF::PDFView::ShowAnnotation ( Annot annot )

Enable rendering of a particular annotation. Only has an effect if HideAnnotation() has previously been called on the same annot.

Parameters

annot The annotation object to resume rendering.

bool pdftron::PDF::PDFView::ShowRect	(	int	page_num,
		const Rect &	rect
	)

Changes the viewing area to fit a rectangle rect on page page_num. Rectangle must be specified in page coordinates. This will adjust current page and zoom appropriately.

Returns: true if successful, false otherwise.

bool pdftron::PDF::PDFView::SmartZoom	(	int	x,
		int	y
	)

Sets the zoom factor to a new value using the given pixel coordinate (x,y) to find an intersecting paragraph. The width of the paragraph helps to determine the zoom value, center of the paragraph is used as a zoom center. Paragraph has to contain more than one line and be wider than 1/5th of a page width. When called on a paragraph wider than current zoom level the new zoom level is set to fit the entire page(zoom out).

The zoom point (x,y) is represented in the screen space, which starts in the upper-left corner of the client window.

Parameters

x	- the horizontal coordinate to look for a text block.
y	- the vertical coordinate to look for a text block.

Returns: true if successful, false if no paragraph intersects the given point.

Point pdftron::PDF::PDFView::SnapToNearestInDoc ( const Point & screen_pt )

Snaps an xy coordinate pair (in screen space) to the nearest piece of document geometry.

void pdftron::PDF::PDFView::TakeSnapshot ( const UString & meta_info )

UString pdftron::PDF::PDFView::Undo ( )

void pdftron::PDF::PDFView::Update ( bool all = false )

Redraws the contents of the buffer.

void pdftron::PDF::PDFView::Update ( const Rect & update )

Redraws the given area in the buffer.

Parameters

update The rectangle to update expressed in screen coordinates.

void pdftron::PDF::PDFView::Update	(	const Annot &	annot,
		int	page_num
	)

Redraws the area covered with a given annotation.

Parameters

annot	The annotation to update.
page_num	The page number on which the annotation is located.

void pdftron::PDF::PDFView::Update ( const Field & field )

Redraws all instances (Widgets) of the field.

Parameters

field the field for which to update all occurances

void pdftron::PDF::PDFView::UpdateBuffer ( )

Update the internal memory buffer that can be returned by GetBuffer(). Since PDFView may not necessarily update the buffer until it finishes rendering the current viewing area, it is required to call UpdateBuffer() to force PDFView to write the current rasterized contents to the buffer. This is important for, say, calling GetBuffer() in a different thread to implement progressive rendering.

Note: UpdateBuffer() ensures thread safety internally. In addition, PDFView calls UpdateBuffer() internally before the user-defined finishing-rendering callback function (specified by SetRenderFinishProc) is called, if applicable. this method is typically used only in PDFNet for C++.

void pdftron::PDF::PDFView::UpdateOCGContext ( )

Prompts the PDFViewCtrl to update its list of optional content groups. Call this method if you modify the PDFDoc in a way that adds or removes a layer. For example, after using Stamper to create a stamp.

void pdftron::PDF::PDFView::UpdatePageLayout ( )

Updates the page layout within the view. This function must be called after document page sequence is modified (such as when a page is being added to or removed from a document) or after changes to page dimensions (e.g. after a page is rotated or resized).

bool pdftron::PDF::PDFView::WereAnnotsForMousePrepared ( int page_num ) const

Returns: true if annotations of the given page have been prepared, false otherwise

Parameters

page_num - page number

bool pdftron::PDF::PDFView::WereWordsPrepared ( int page_num ) const

Returns: true if words of the given page has been prepared, false otherwise

Parameters

page_num - page number

The documentation for this class was generated from the following file:

PDF/PDFView.h

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

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