Back to Seed Clases

Gtk

Classes

Interfaces

Structs

Unions

Enums

GObject.Object
parent-child marker Gtk.PrintOperation

Class Gtk.PrintOperation

Import line:	Gtk = imports.gi.Gtk;
GIR File:	Gtk-3.0.gir
C documentation:	GtkPrintOperation
Class :	PrintOperation
Implements:	Gtk.PrintOperationPreview
Extends:	GObject.Object

GtkPrintOperation is the high-level, portable printing API.
It looks a bit different than other GTK+ dialogs such as the
GtkFileChooser, since some platforms don't expose enough
infrastructure to implement a good print dialog. On such
platforms, GtkPrintOperation uses the native print dialog.
On platforms which do not provide a native print dialog, GTK+
uses its own, see GtkPrintUnixDialog.
The typical way to use the high-level printing API is to create
a GtkPrintOperation object with gtk_print_operation_new() when
the user selects to print. Then you set some properties on it,
e.g. the page size, any GtkPrintSettings from previous print
operations, the number of pages, the current page, etc.
Then you start the print operation by calling gtk_print_operation_run().
It will then show a dialog, let the user select a printer and
options. When the user finished the dialog various signals will
be emitted on the GtkPrintOperation, the main one being
GtkPrintOperation::draw-page, which you are supposed to catch
and render the page on the provided GtkPrintContext using Cairo.

The high-level printing API

static GtkPrintSettings *settings = NULL;
static void
do_print (void)
{
GtkPrintOperation *print;
GtkPrintOperationResult res;
print = gtk_print_operation_new ();
if (settings != NULL)
gtk_print_operation_set_print_settings (print, settings);
g_signal_connect (print, "begin_print", G_CALLBACK (begin_print), NULL);
g_signal_connect (print, "draw_page", G_CALLBACK (draw_page), NULL);
res = gtk_print_operation_run (print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
GTK_WINDOW (main_window), NULL);
if (res == GTK_PRINT_OPERATION_RESULT_APPLY)
{
if (settings != NULL)
g_object_unref (settings);
settings = g_object_ref (gtk_print_operation_get_print_settings (print));
}
g_object_unref (print);
}

By default GtkPrintOperation uses an external application to do
print preview. To implement a custom print preview, an application
must connect to the preview signal. The functions
gtk_print_operation_print_preview_render_page(),
gtk_print_operation_preview_end_preview() and
gtk_print_operation_preview_is_selected()
are useful when implementing a print preview.

Properties
Properties		Defined By
	allow_async : gboolean Determines whether the print operation may run asynchronously or not. Determines whether the print operation may run asynchronously or not. Some systems don't support asynchronous printing, but those that do will return GTK_PRINT_OPERATION_RESULT_IN_PROGRESS as the status, and emit the GtkPrintOperation::done signal when the operation is actually done. The Windows port does not support asynchronous operation at all (this is unlikely to change). On other platforms, all actions except for GTK_PRINT_OPERATION_ACTION_EXPORT support asynchronous operation.	Gtk.PrintOperation
	current_page : gint32 The current page in the document. The current page in the document. If this is set before gtk_print_operation_run(), the user will be able to select to print only the current page. Note that this only makes sense for pre-paginated documents.	Gtk.PrintOperation
	custom_tab_label : String Used as the label of the tab containing custom widgets. Used as the label of the tab containing custom widgets. Note that this property may be ignored on some platforms. If this is NULL, GTK+ uses a default label.	Gtk.PrintOperation
	default_page_setup : Gtk.PageSetup The GtkPageSetup used by default. The GtkPageSetup used by default. This page setup will be used by gtk_print_operation_run(), but it can be overridden on a per-page basis by connecting to the GtkPrintOperation::request-page-setup signal.	Gtk.PrintOperation
	embed_page_setup : gboolean If TRUE, page size combo box and orientation combo box are embedded into page setup page. If TRUE, page size combo box and orientation combo box are embedded into page setup page.	Gtk.PrintOperation
	export_filename : String The name of a file to generate instead of showing the print dialog. The name of a file to generate instead of showing the print dialog. Currently, PDF is the only supported format. The intended use of this property is for implementing "Export to PDF" actions. "Print to PDF" support is independent of this and is done by letting the user pick the "Print to PDF" item from the list of printers in the print dialog.	Gtk.PrintOperation
	has_selection : gboolean Determines whether there is a selection in your application. Determines whether there is a selection in your application. This can allow your application to print the selection. This is typically used to make a "Selection" button sensitive.	Gtk.PrintOperation
	job_name : String A string used to identify the job (e.g. A string used to identify the job (e.g. in monitoring applications like eggcups). If you don't set a job name, GTK+ picks a default one by numbering successive print jobs.	Gtk.PrintOperation
	n_pages : gint32 The number of pages in the document. The number of pages in the document. This must be set to a positive number before the rendering starts. It may be set in a GtkPrintOperation::begin-print signal hander. Note that the page numbers passed to the GtkPrintOperation::request-page-setup and GtkPrintOperation::draw-page signals are 0-based, i.e. if the user chooses to print all pages, the last ::draw-page signal will be for page n_pages - 1.	Gtk.PrintOperation
	n_pages_to_print : gint32 read only The number of pages that will be printed. The number of pages that will be printed. Note that this value is set during print preparation phase (GTK_PRINT_STATUS_PREPARING), so this value should never be get before the data generation phase (GTK_PRINT_STATUS_GENERATING_DATA). You can connect to the GtkPrintOperation::status-changed signal and call gtk_print_operation_get_n_pages_to_print() when print status is GTK_PRINT_STATUS_GENERATING_DATA. This is typically used to track the progress of print operation.	Gtk.PrintOperation
	parent_instance : GObject.Object read only	Gtk.PrintOperation
	print_settings : Gtk.PrintSettings The GtkPrintSettings used for initializing the dialog. The GtkPrintSettings used for initializing the dialog. Setting this property is typically used to re-establish print settings from a previous print operation, see gtk_print_operation_run().	Gtk.PrintOperation
	priv : Gtk.PrintOperationPrivate read only	Gtk.PrintOperation
	show_progress : gboolean Determines whether to show a progress dialog during the print operation. Determines whether to show a progress dialog during the print operation.	Gtk.PrintOperation
	status : Gtk.PrintStatus read only The status of the print operation. The status of the print operation.	Gtk.PrintOperation
	status_string : String read only A string representation of the status of the print operation. A string representation of the status of the print operation. The string is translated and suitable for displaying the print status e.g. in a GtkStatusbar. See the GtkPrintOperation:status property for a status value that is suitable for programmatic use.	Gtk.PrintOperation
	support_selection : gboolean If TRUE, the print operation will support print of selection. If TRUE, the print operation will support print of selection. This allows the print dialog to show a "Selection" button.	Gtk.PrintOperation
	track_print_status : gboolean If TRUE, the print operation will try to continue report on the status of the print job in the printer queues and printer. If TRUE, the print operation will try to continue report on the status of the print job in the printer queues and printer. This can allow your application to show things like "out of paper" issues, and when the print job actually reaches the printer. However, this is often implemented using polling, and should not be enabled unless needed.	Gtk.PrintOperation
	unit : Gtk.Unit The transformation for the cairo context obtained from GtkPrintContext is set up in such a way that distances are measured in units of unit. The transformation for the cairo context obtained from GtkPrintContext is set up in such a way that distances are measured in units of unit.	Gtk.PrintOperation
	use_full_page : gboolean If TRUE, the transformation for the cairo context obtained from GtkPrintContext puts the origin at the top left corner of the page (which may not be the top left corner of the sheet, depending on page orientation and the number of pages per sheet). If TRUE, the transformation for the cairo context obtained from GtkPrintContext puts the origin at the top left corner of the page (which may not be the top left corner of the sheet, depending on page orientation and the number of pages per sheet). Otherwise, the origin is at the top left corner of the imageable area (i.e. inside the margins).	Gtk.PrintOperation

Methods / Constructors
Method / Constructor		Defined By
	new Gtk.PrintOperation (Object *properties) Create a new Gtk.PrintOperation Create a new Gtk.PrintOperation Parameters: Object properties*
	cancel () : none Cancels a running print operation. Cancels a running print operation. This function may be called from a GtkPrintOperation::begin-print, GtkPrintOperation::paginate or GtkPrintOperation::draw-page signal handler to stop the currently running print operation. Returns: none	Gtk.PrintOperation
	draw_page_finish () : none Signalize that drawing of particular page is complete. Signalize that drawing of particular page is complete. It is called after completion of page drawing (e.g. drawing in another thread). If gtk_print_operation_set_defer_drawing() was called before, then this function has to be called by application. In another case it is called by the library itself. Returns: none	Gtk.PrintOperation
	end_preview () : none Ends a preview. Ends a preview. This function must be called to finish a custom print preview. Returns: none	Gtk.PrintOperationPreview
	get_default_page_setup () : Gtk.PageSetup Returns the default page setup, see gtk_print_operation_set_default_page_setup(). Returns the default page setup, see gtk_print_operation_set_default_page_setup(). Returns: Gtk.PageSetup the default page setup	Gtk.PrintOperation
	get_embed_page_setup () : gboolean Gets the value of GtkPrintOperation::embed-page-setup property. Gets the value of GtkPrintOperation::embed-page-setup property. Returns: gboolean whether page setup selection combos are embedded	Gtk.PrintOperation
	get_error () : none Call this when the result of a print operation is GTK_PRINT_OPERATION_RESULT_ERROR, either as returned by gtk_print_operation_run(), or in the GtkPrintOperation::done signal handler. Call this when the result of a print operation is GTK_PRINT_OPERATION_RESULT_ERROR, either as returned by gtk_print_operation_run(), or in the GtkPrintOperation::done signal handler. The returned GError will contain more details on what went wrong. Returns: none	Gtk.PrintOperation
	get_has_selection () : gboolean Gets the value of GtkPrintOperation::has-selection property. Gets the value of GtkPrintOperation::has-selection property. Returns: gboolean whether there is a selection	Gtk.PrintOperation
	get_n_pages_to_print () : gint32 Returns the number of pages that will be printed. Returns the number of pages that will be printed. Note that this value is set during print preparation phase (GTK_PRINT_STATUS_PREPARING), so this function should never be called before the data generation phase (GTK_PRINT_STATUS_GENERATING_DATA). You can connect to the GtkPrintOperation::status-changed signal and call gtk_print_operation_get_n_pages_to_print() when print status is GTK_PRINT_STATUS_GENERATING_DATA. This is typically used to track the progress of print operation. Returns: gint32 the number of pages that will be printed	Gtk.PrintOperation
	get_print_settings () : Gtk.PrintSettings Returns the current print settings. Returns the current print settings. Note that the return value is NULL until either gtk_print_operation_set_print_settings() or gtk_print_operation_run() have been called. Returns: Gtk.PrintSettings the current print settings of op.	Gtk.PrintOperation
	get_status () : Gtk.PrintStatus Returns the status of the print operation. Returns the status of the print operation. Also see gtk_print_operation_get_status_string(). Returns: Gtk.PrintStatus the status of the print operation	Gtk.PrintOperation
	get_status_string () : String Returns a string representation of the status of the print operation. Returns a string representation of the status of the print operation. The string is translated and suitable for displaying the print status e.g. in a GtkStatusbar. Use gtk_print_operation_get_status() to obtain a status value that is suitable for programmatic use. of the print operation Returns: String a string representation of the status	Gtk.PrintOperation
	get_support_selection () : gboolean Gets the value of GtkPrintOperation::support-selection property. Gets the value of GtkPrintOperation::support-selection property. Returns: gboolean whether the application supports print of selection	Gtk.PrintOperation
	is_finished () : gboolean A convenience function to find out if the print operation is finished, either successfully (GTK_PRINT_STATUS_FINISHED) or unsuccessfully (GTK_PRINT_STATUS_FINISHED_ABORTED). A convenience function to find out if the print operation is finished, either successfully (GTK_PRINT_STATUS_FINISHED) or unsuccessfully (GTK_PRINT_STATUS_FINISHED_ABORTED). can be in a non-finished state even after done has been called, as the operation status then tracks the print job status on the printer. Returns: gboolean TRUE, if the print operation is finished.	Gtk.PrintOperation
	is_selected (gint32 *page_nr) : gboolean Returns whether the given page is included in the set of pages that have been selected for printing. Returns whether the given page is included in the set of pages that have been selected for printing. Parameters: gint32 page_nr* Required (not null) a page number Returns: gboolean TRUE if the page has been selected for printing	Gtk.PrintOperationPreview
	render_page (gint32 *page_nr) : none Renders a page to the preview, using the print context that was passed to the GtkPrintOperation::preview handler together with preview. Renders a page to the preview, using the print context that was passed to the GtkPrintOperation::preview handler together with preview. A custom iprint preview should use this function in its ::expose handler to render the currently selected page. Note that this function requires a suitable cairo context to be associated with the print context. Parameters: gint32 page_nr* Required (not null) the page to render Returns: none	Gtk.PrintOperationPreview
	run (PrintOperationAction *action, Window parent) : Gtk.PrintOperationResult Runs the print operation, by first letting the user modify print settings in the print dialog, and then print the document. Runs the print operation, by first letting the user modify print settings in the print dialog, and then print the document. Normally that this function does not return until the rendering of all pages is complete. You can connect to the GtkPrintOperation::status-changed signal on op to obtain some information about the progress of the print operation. Furthermore, it may use a recursive mainloop to show the print dialog. If you call gtk_print_operation_set_allow_async() or set the GtkPrintOperation:allow-async property the operation will run asynchronously if this is supported on the platform. The GtkPrintOperation::done signal will be emitted with the result of the operation when the it is done (i.e. when the dialog is canceled, or when the print succeeds or fails). \|[ if (settings != NULL) gtk_print_operation_set_print_settings (print, settings); if (page_setup != NULL) gtk_print_operation_set_default_page_setup (print, page_setup); g_signal_connect (print, "begin-print", G_CALLBACK (begin_print), &data); g_signal_connect (print, "draw-page", G_CALLBACK (draw_page), &data); res = gtk_print_operation_run (print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, parent, &error); if (res == GTK_PRINT_OPERATION_RESULT_ERROR) { error_dialog = gtk_message_dialog_new (GTK_WINDOW (parent), GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "Error printing file:\ns", error->message); g_signal_connect (error_dialog, "response", G_CALLBACK (gtk_widget_destroy), NULL); gtk_widget_show (error_dialog); g_error_free (error); } else if (res == GTK_PRINT_OPERATION_RESULT_APPLY) { if (settings != NULL) g_object_unref (settings); settings = g_object_ref (gtk_print_operation_get_print_settings (print)); } ]\| Note that gtk_print_operation_run() can only be called once on a given GtkPrintOperation. GTK_PRINT_OPERATION_RESULT_APPLY* indicates that the printing was completed successfully. In this case, it is a good idea to obtain the used print settings with gtk_print_operation_get_print_settings() and store them for reuse with the next print operation. A value of GTK_PRINT_OPERATION_RESULT_IN_PROGRESS means the operation is running asynchronously, and will emit the GtkPrintOperation::done signal when done. Parameters: Gtk.PrintOperationAction action Required (not null) the action to start Gtk.Window parent Transient parent of the dialog Returns: Gtk.PrintOperationResult the result of the print operation. A return value of	Gtk.PrintOperation
	set_allow_async (gboolean *allow_async) : none Sets whether the gtk_print_operation_run() may return before the print operation is completed. Sets whether the gtk_print_operation_run() may return before the print operation is completed. Note that some platforms may not allow asynchronous operation. Parameters: gboolean allow_async* Required (not null) TRUE to allow asynchronous operation Returns: none	Gtk.PrintOperation
	set_current_page (gint32 *current_page) : none Sets the current page. Sets the current page. If this is called before gtk_print_operation_run(), the user will be able to select to print only the current page. Note that this only makes sense for pre-paginated documents. Parameters: gint32 current_page* Required (not null) the current page, 0-based Returns: none	Gtk.PrintOperation
	set_custom_tab_label (String *label) : none Sets the label for the tab holding custom widgets. Sets the label for the tab holding custom widgets. Parameters: String label* the label to use, or NULL to use the default label Returns: none	Gtk.PrintOperation
	set_default_page_setup (PageSetup *default_page_setup) : none Makes default_page_setup* the default page setup for op. Makes default_page_setup the default page setup for op. This page setup will be used by gtk_print_operation_run(), but it can be overridden on a per-page basis by connecting to the GtkPrintOperation::request-page-setup signal. Parameters: Gtk.PageSetup default_page_setup a GtkPageSetup, or NULL Returns: none	Gtk.PrintOperation
	set_defer_drawing () : none Sets up the GtkPrintOperation to wait for calling of gtk_print_operation_draw_page_finish() from application. Sets up the GtkPrintOperation to wait for calling of gtk_print_operation_draw_page_finish() from application. It can be used for drawing page in another thread. This function must be called in the callback of "draw-page" signal. Returns: none	Gtk.PrintOperation
	set_embed_page_setup (gboolean *embed) : none Embed page size combo box and orientation combo box into page setup page. Embed page size combo box and orientation combo box into page setup page. Selected page setup is stored as default page setup in GtkPrintOperation. Parameters: gboolean embed* Required (not null) TRUE to embed page setup selection in the GtkPrintDialog Returns: none	Gtk.PrintOperation
	set_export_filename (String *filename) : none Sets up the GtkPrintOperation* to generate a file instead of showing the print dialog. Sets up the GtkPrintOperation to generate a file instead of showing the print dialog. The indended use of this function is for implementing "Export to PDF" actions. Currently, PDF is the only supported format. "Print to PDF" support is independent of this and is done by letting the user pick the "Print to PDF" item from the list of printers in the print dialog. Parameters: String filename Required (not null) the filename for the exported file Returns: none	Gtk.PrintOperation
	set_has_selection (gboolean *has_selection) : none Sets whether there is a selection to print. Sets whether there is a selection to print. Application has to set number of pages to which the selection will draw by gtk_print_operation_set_n_pages() in a callback of GtkPrintOperation::begin-print. Parameters: gboolean has_selection* Required (not null) TRUE indicates that a selection exists Returns: none	Gtk.PrintOperation
	set_job_name (String *job_name) : none Sets the name of the print job. Sets the name of the print job. The name is used to identify the job (e.g. in monitoring applications like eggcups). If you don't set a job name, GTK+ picks a default one by numbering successive print jobs. Parameters: String job_name* Required (not null) a string that identifies the print job Returns: none	Gtk.PrintOperation
	set_n_pages (gint32 *n_pages) : none Sets the number of pages in the document. Sets the number of pages in the document. This must be set to a positive number before the rendering starts. It may be set in a GtkPrintOperation::begin-print signal hander. Note that the page numbers passed to the GtkPrintOperation::request-page-setup and GtkPrintOperation::draw-page signals are 0-based, i.e. if the user chooses to print all pages, the last ::draw-page signal will be for page n_pages* - 1. Parameters: gint32 n_pages Required (not null) the number of pages Returns: none	Gtk.PrintOperation
	set_print_settings (PrintSettings *print_settings) : none Sets the print settings for op. Sets the print settings for op. This is typically used to re-establish print settings from a previous print operation, see gtk_print_operation_run(). Parameters: Gtk.PrintSettings print_settings* GtkPrintSettings Returns: none	Gtk.PrintOperation
	set_show_progress (gboolean *show_progress) : none If show_progress* is TRUE, the print operation will show a progress dialog during the print operation. If show_progress is TRUE, the print operation will show a progress dialog during the print operation. Parameters: gboolean show_progress Required (not null) TRUE to show a progress dialog Returns: none	Gtk.PrintOperation
	set_support_selection (gboolean *support_selection) : none Sets whether selection is supported by GtkPrintOperation. Sets whether selection is supported by GtkPrintOperation. Parameters: gboolean support_selection* Required (not null) TRUE to support selection Returns: none	Gtk.PrintOperation
	set_track_print_status (gboolean *track_status) : none If track_status is TRUE, the print operation will try to continue report on the status of the print job in the printer queues and printer. If track_status is TRUE, the print operation will try to continue report on the status of the print job in the printer queues and printer. This can allow your application to show things like "out of paper" issues, and when the print job actually reaches the printer. This function is often implemented using some form of polling, so it should not be enabled unless needed. Parameters: gboolean track_status* Required (not null) TRUE to track status after printing Returns: none	Gtk.PrintOperation
	set_unit (Unit *unit) : none Sets up the transformation for the cairo context obtained from GtkPrintContext* in such a way that distances are measured in units of unit. Sets up the transformation for the cairo context obtained from GtkPrintContext in such a way that distances are measured in units of unit. Parameters: Gtk.Unit unit Required (not null) the unit to use Returns: none	Gtk.PrintOperation
	set_use_full_page (gboolean *full_page) : none If full_page* is TRUE, the transformation for the cairo context obtained from GtkPrintContext puts the origin at the top left corner of the page (which may not be the top left corner of the sheet, depending on page orientation and the number of pages per sheet). If full_page is TRUE, the transformation for the cairo context obtained from GtkPrintContext puts the origin at the top left corner of the page (which may not be the top left corner of the sheet, depending on page orientation and the number of pages per sheet). Otherwise, the origin is at the top left corner of the imageable area (i.e. inside the margins). Parameters: gboolean full_page Required (not null) TRUE to set up the GtkPrintContext for the full page Returns: none	Gtk.PrintOperation

Events - usage syntax: this.signals.EVENTNAME.connect( Function )
Event		Defined By
	begin_print (PrintOperation *self, PrintContext context) : none Emitted after the user has finished changing print settings in the dialog, before the actual rendering starts. Emitted after the user has finished changing print settings in the dialog, before the actual rendering starts. A typical use for ::begin-print is to use the parameters from the GtkPrintContext* and paginate the document accordingly, and then set the number of pages with gtk_print_operation_set_n_pages(). Parameters: Gtk.PrintOperation self Gtk.PrintContext context Returns: {none}	Gtk.PrintOperation
	create_custom_widget (PrintOperation *self) : GObject.Object Emitted when displaying the print dialog. Emitted when displaying the print dialog. If you return a widget in a handler for this signal it will be added to a custom tab in the print dialog. You typically return a container widget with multiple widgets in it. The print dialog owns the returned widget, and its lifetime is not controlled by the application. However, the widget is guaranteed to stay around until the GtkPrintOperation::custom-widget-apply signal is emitted on the operation. Then you can read out any information you need from the widgets. the print dialog, or NULL* Parameters: Gtk.PrintOperation self Returns: {GObject.Object}	Gtk.PrintOperation
	custom_widget_apply (PrintOperation *self, Widget widget) : none Emitted right before GtkPrintOperation::begin-print if you added a custom widget in the GtkPrintOperation::create-custom-widget handler. Emitted right before GtkPrintOperation::begin-print if you added a custom widget in the GtkPrintOperation::create-custom-widget handler. When you get this signal you should read the information from the custom widgets, as the widgets are not guaraneed to be around at a later time. Parameters: Gtk.PrintOperation self* Gtk.Widget widget Returns: {none}	Gtk.PrintOperation
	done (PrintOperation *self, PrintOperationResult result) : none Emitted when the print operation run has finished doing everything required for printing. Emitted when the print operation run has finished doing everything required for printing. If result* is GTK_PRINT_OPERATION_RESULT_ERROR then you can call gtk_print_operation_get_error() for more information. If you enabled print status tracking then gtk_print_operation_is_finished() may still return FALSE after GtkPrintOperation::done was emitted. Parameters: Gtk.PrintOperation self Gtk.PrintOperationResult result Returns: {none}	Gtk.PrintOperation
	draw_page (PrintOperation *self, PrintContext context, gint32 page_nr) : none Emitted for every page that is printed. Emitted for every page that is printed. The signal handler must render the page_nr's page onto the cairo context obtained from context* using gtk_print_context_get_cairo_context(). \|[ static void draw_page (GtkPrintOperation operation, GtkPrintContext context, gint page_nr, gpointer user_data) { cairo_t cr; PangoLayout layout; gdouble width, text_height; gint layout_height; PangoFontDescription desc; cr = gtk_print_context_get_cairo_context (context); width = gtk_print_context_get_width (context); cairo_rectangle (cr, 0, 0, width, HEADER_HEIGHT); cairo_set_source_rgb (cr, 0.8, 0.8, 0.8); cairo_fill (cr); layout = gtk_print_context_create_pango_layout (context); desc = pango_font_description_from_string ("sans 14"); pango_layout_set_font_description (layout, desc); pango_font_description_free (desc); pango_layout_set_text (layout, "some text", -1); pango_layout_set_width (layout, width PANGO_SCALE); pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER); pango_layout_get_size (layout, NULL, &layout_height); text_height = (gdouble)layout_height / PANGO_SCALE; cairo_move_to (cr, width / 2, (HEADER_HEIGHT - text_height) / 2); pango_cairo_show_layout (cr, layout); g_object_unref (layout); } ]\| Use gtk_print_operation_set_use_full_page() and gtk_print_operation_set_unit() before starting the print operation to set up the transformation of the cairo context according to your needs. Parameters: Gtk.PrintOperation self Gtk.PrintContext context gint32 page_nr Returns: {none}	Gtk.PrintOperation
	end_print (PrintOperation *self, PrintContext context) : none Emitted after all pages have been rendered. Emitted after all pages have been rendered. A handler for this signal can clean up any resources that have been allocated in the GtkPrintOperation::begin-print handler. Parameters: Gtk.PrintOperation self* Gtk.PrintContext context Returns: {none}	Gtk.PrintOperation
	got_page_size (PrintOperationPreview *self, PrintContext context, PageSetup page_setup) : none The ::got-page-size signal is emitted once for each page that gets rendered to the preview. The ::got-page-size signal is emitted once for each page that gets rendered to the preview. A handler for this signal should update the context* according to page_setup and set up a suitable cairo context, using gtk_print_context_set_cairo_context(). Parameters: Gtk.PrintOperationPreview self Gtk.PrintContext context Gtk.PageSetup page_setup Returns: {none}	Gtk.PrintOperationPreview
	paginate (PrintOperation *self, PrintContext context) : gboolean Emitted after the GtkPrintOperation::begin-print signal, but before the actual rendering starts. Emitted after the GtkPrintOperation::begin-print signal, but before the actual rendering starts. It keeps getting emitted until a connected signal handler returns TRUE. The ::paginate signal is intended to be used for paginating a document in small chunks, to avoid blocking the user interface for a long time. The signal handler should update the number of pages using gtk_print_operation_set_n_pages(), and return TRUE* if the document has been completely paginated. If you don't need to do pagination in chunks, you can simply do it all in the ::begin-print handler, and set the number of pages from there. Parameters: Gtk.PrintOperation self Gtk.PrintContext context Returns: {gboolean}	Gtk.PrintOperation
	preview (PrintOperation *self, PrintOperationPreview preview, PrintContext context, Window parent) : gboolean Gets emitted when a preview is requested from the native dialog. Gets emitted when a preview is requested from the native dialog. The default handler for this signal uses an external viewer application to preview. To implement a custom print preview, an application must return TRUE* from its handler for this signal. In order to use the provided context for the preview implementation, it must be given a suitable cairo context with gtk_print_context_set_cairo_context(). The custom preview implementation can use gtk_print_operation_preview_is_selected() and gtk_print_operation_preview_render_page() to find pages which are selected for print and render them. The preview must be finished by calling gtk_print_operation_preview_end_preview() (typically in response to the user clicking a close button). Parameters: Gtk.PrintOperation self Gtk.PrintOperationPreview preview Gtk.PrintContext context Gtk.Window parent Returns: {gboolean}	Gtk.PrintOperation
	ready (PrintOperationPreview *self, PrintContext context) : none The ::ready signal gets emitted once per preview operation, before the first page is rendered. The ::ready signal gets emitted once per preview operation, before the first page is rendered. A handler for this signal can be used for setup tasks. Parameters: Gtk.PrintOperationPreview self* Gtk.PrintContext context Returns: {none}	Gtk.PrintOperationPreview
	request_page_setup (PrintOperation *self, PrintContext context, gint32 page_nr, PageSetup setup) : none Emitted once for every page that is printed, to give the application a chance to modify the page setup. Emitted once for every page that is printed, to give the application a chance to modify the page setup. Any changes done to setup* will be in force only for printing this page. Parameters: Gtk.PrintOperation self Gtk.PrintContext context gint32 page_nr Gtk.PageSetup setup Returns: {none}	Gtk.PrintOperation
	status_changed (PrintOperation *self) : none Emitted at between the various phases of the print operation. Emitted at between the various phases of the print operation. See GtkPrintStatus* for the phases that are being discriminated. Use gtk_print_operation_get_status() to find out the current status. Parameters: Gtk.PrintOperation self Returns: {none}	Gtk.PrintOperation
	update_custom_widget (PrintOperation *self, Widget widget, PageSetup setup, PrintSettings settings) : none Emitted after change of selected printer. Emitted after change of selected printer. The actual page setup and print settings are passed to the custom widget, which can actualize itself according to this change. Parameters: Gtk.PrintOperation self* Gtk.Widget widget Gtk.PageSetup setup Gtk.PrintSettings settings Returns: {none}	Gtk.PrintOperation

Used by These Methods / Signals / Properties
Class / Namespace	Method / Signal / Properties
WebKit.WebFrame Method	print_full (PrintOperation *operation, PrintOperationAction action) : Gtk.PrintOperationResult Prints the given WebKitWebFrame, using the given GtkPrintOperation* and GtkPrintOperationAction.