Gtk.PrintOperation¶

Subclasses:	None

Methods¶

Inherited:	GObject.Object (37), Gtk.PrintOperationPreview (3)
Structs:	GObject.ObjectClass (5)

class	`new` ()
	`cancel` ()
	`draw_page_finish` ()
	`get_default_page_setup` ()
	`get_embed_page_setup` ()
	`get_error` ()
	`get_has_selection` ()
	`get_n_pages_to_print` ()
	`get_print_settings` ()
	`get_status` ()
	`get_status_string` ()
	`get_support_selection` ()
	`is_finished` ()
	`run` (action, parent)
	`set_allow_async` (allow_async)
	`set_current_page` (current_page)
	`set_custom_tab_label` (label)
	`set_default_page_setup` (default_page_setup)
	`set_defer_drawing` ()
	`set_embed_page_setup` (embed)
	`set_export_filename` (filename)
	`set_has_selection` (has_selection)
	`set_job_name` (job_name)
	`set_n_pages` (n_pages)
	`set_print_settings` (print_settings)
	`set_show_progress` (show_progress)
	`set_support_selection` (support_selection)
	`set_track_print_status` (track_status)
	`set_unit` (unit)
	`set_use_full_page` (full_page)

Virtual Methods¶

Inherited:	GObject.Object (7), Gtk.PrintOperationPreview (5)

	`do_begin_print` (context)
	`do_custom_widget_apply` (widget)
	`do_done` (result)
	`do_draw_page` (context, page_nr)
	`do_end_print` (context)
	`do_paginate` (context)
	`do_preview` (preview, context, parent)
	`do_request_page_setup` (context, page_nr, setup)
	`do_status_changed` ()
	`do_update_custom_widget` (widget, setup, settings)

Properties¶

Name	Type	Flags	Short Description
`allow-async`	`bool`	r/w/en	`True` if print process may run asynchronous.
`current-page`	`int`	r/w/en	The current page in the document
`custom-tab-label`	`str`	r/w	Label for the tab containing custom widgets.
`default-page-setup`	`Gtk.PageSetup`	r/w	The `Gtk.PageSetup` used by default
`embed-page-setup`	`bool`	r/w/en	`True` if page setup combos are embedded in GtkPrintUnixDialog
`export-filename`	`str`	r/w	Export filename
`has-selection`	`bool`	r/w/en	`True` if a selection exists.
`job-name`	`str`	r/w	A string used for identifying the print job.
`n-pages`	`int`	r/w/en	The number of pages in the document.
`n-pages-to-print`	`int`	r/en	The number of pages that will be printed.
`print-settings`	`Gtk.PrintSettings`	r/w	The `Gtk.PrintSettings` used for initializing the dialog
`show-progress`	`bool`	r/w/en	`True` if a progress dialog is shown while printing.
`status`	`Gtk.PrintStatus`	r/en	The status of the print operation
`status-string`	`str`	r	A human-readable description of the status
`support-selection`	`bool`	r/w/en	`True` if the print operation will support print of selection.
`track-print-status`	`bool`	r/w/en	`True` if the print operation will continue to report on the print job status after the print data has been sent to the printer or print server.
`unit`	`Gtk.Unit`	r/w/en	The unit in which distances can be measured in the context
`use-full-page`	`bool`	r/w/en	`True` if the origin of the context should be at the corner of the page and not the corner of the imageable area

Signals¶

Inherited:	GObject.Object (1), Gtk.PrintOperationPreview (2)

Name	Short Description
`begin-print`	Emitted after the user has finished changing print settings in the dialog, before the actual rendering starts.
`create-custom-widget`	Emitted when displaying the print dialog.
`custom-widget-apply`	Emitted right before `Gtk.PrintOperation` `::begin-print` if you added a custom widget in the `Gtk.PrintOperation` `::create-custom-widget` handler.
`done`	Emitted when the print operation run has finished doing everything required for printing.
`draw-page`	Emitted for every page that is printed.
`end-print`	Emitted after all pages have been rendered.
`paginate`	Emitted after the `Gtk.PrintOperation` `::begin-print` signal, but before the actual rendering starts.
`preview`	Gets emitted when a preview is requested from the native dialog.
`request-page-setup`	Emitted once for every page that is printed, to give the application a chance to modify the page setup.
`status-changed`	Emitted at between the various phases of the print operation.
`update-custom-widget`	Emitted after change of selected printer.

Fields¶

Inherited:	GObject.Object (1), Gtk.PrintOperationPreview (2)

Name	Type	Access	Description
parent_instance	`GObject.Object`	r

Class Details¶

class Gtk.PrintOperation(**kwargs)¶

Bases:	`GObject.Object`, `Gtk.PrintOperationPreview`
Abstract:	No
Structure:	`Gtk.PrintOperationClass`

Gtk.PrintOperation is the high-level, portable printing API. It looks a bit different than other GTK+ dialogs such as the Gtk.FileChooser, since some platforms don’t expose enough infrastructure to implement a good print dialog. On such platforms, Gtk.PrintOperation 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 Gtk.PrintOperation object with Gtk.PrintOperation.new() when the user selects to print. Then you set some properties on it, e.g. the page size, any Gtk.PrintSettings from previous print operations, the number of pages, the current page, etc.

Then you start the print operation by calling Gtk.PrintOperation.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 Gtk.PrintOperation, the main one being Gtk.PrintOperation ::draw-page, which you are supposed to catch and render the page on the provided Gtk.PrintContext 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 Gtk.PrintOperation 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.PrintOperationPreview.render_page(), Gtk.PrintOperationPreview.end_preview() and Gtk.PrintOperationPreview.is_selected() are useful when implementing a print preview.

classmethod new()[source]¶

Returns:	a new `Gtk.PrintOperation`
Return type:	`Gtk.PrintOperation`

Creates a new Gtk.PrintOperation.

New in version 2.10.

cancel()[source]¶: Cancels a running print operation. This function may be called from a Gtk.PrintOperation ::begin-print, Gtk.PrintOperation ::paginate or Gtk.PrintOperation ::draw-page signal handler to stop the currently running print operation.

New in version 2.10.

draw_page_finish()[source]¶

Signalize that drawing of particular page is complete.

It is called after completion of page drawing (e.g. drawing in another thread). If Gtk.PrintOperation.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.

New in version 2.16.

get_default_page_setup()[source]¶

Returns:	the default page setup
Return type:	`Gtk.PageSetup`

Returns the default page setup, see Gtk.PrintOperation.set_default_page_setup().

New in version 2.10.

get_embed_page_setup()[source]¶

Returns:	whether page setup selection combos are embedded
Return type:	`bool`

Gets the value of Gtk.PrintOperation :embed-page-setup property.

New in version 2.18.

get_error()[source]¶

Raises:	`GLib.Error`

Call this when the result of a print operation is Gtk.PrintOperationResult.ERROR, either as returned by Gtk.PrintOperation.run(), or in the Gtk.PrintOperation ::done signal handler. The returned GLib.Error will contain more details on what went wrong.

New in version 2.10.

get_has_selection()[source]¶

Returns:	whether there is a selection
Return type:	`bool`

Gets the value of Gtk.PrintOperation :has-selection property.

New in version 2.18.

get_n_pages_to_print()[source]¶

Returns:	the number of pages that will be printed
Return type:	`int`

Returns the number of pages that will be printed.

Note that this value is set during print preparation phase (Gtk.PrintStatus.PREPARING), so this function should never be called before the data generation phase (Gtk.PrintStatus.GENERATING_DATA). You can connect to the Gtk.PrintOperation ::status-changed signal and call Gtk.PrintOperation.get_n_pages_to_print() when print status is Gtk.PrintStatus.GENERATING_DATA. This is typically used to track the progress of print operation.

New in version 2.18.

get_print_settings()[source]¶

Returns:	the current print settings of self.
Return type:	`Gtk.PrintSettings`

Returns the current print settings.

Note that the return value is None until either Gtk.PrintOperation.set_print_settings() or Gtk.PrintOperation.run() have been called.

New in version 2.10.

get_status()[source]¶

Returns:	the status of the print operation
Return type:	`Gtk.PrintStatus`

Returns the status of the print operation. Also see Gtk.PrintOperation.get_status_string().

New in version 2.10.

get_status_string()[source]¶

Returns:	a string representation of the status of the print operation
Return type:	`str`

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 Gtk.Statusbar.

Use Gtk.PrintOperation.get_status() to obtain a status value that is suitable for programmatic use.

New in version 2.10.

get_support_selection()[source]¶

Returns:	whether the application supports print of selection
Return type:	`bool`

Gets the value of Gtk.PrintOperation :support-selection property.

New in version 2.18.

is_finished()[source]¶

Returns:	`True`, if the print operation is finished.
Return type:	`bool`

A convenience function to find out if the print operation is finished, either successfully (Gtk.PrintStatus.FINISHED) or unsuccessfully (Gtk.PrintStatus.FINISHED_ABORTED).

Note: when you enable print status tracking the print operation 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.

New in version 2.10.

run(action, parent)[source]¶

Parameters:	action (`Gtk.PrintOperationAction`) – the action to start parent (`Gtk.Window` or `None`) – Transient parent of the dialog
Raises:	`GLib.Error`
Returns:	the result of the print operation. A return value of `Gtk.PrintOperationResult.APPLY` indicates that the printing was completed successfully. In this case, it is a good idea to obtain the used print settings with `Gtk.PrintOperation.get_print_settings`() and store them for reuse with the next print operation. A value of `Gtk.PrintOperationResult.IN_PROGRESS` means the operation is running asynchronously, and will emit the `Gtk.PrintOperation` `::done` signal when done.
Return type:	`Gtk.PrintOperationResult`

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 Gtk.PrintOperation ::status-changed signal on self 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.PrintOperation.set_allow_async() or set the Gtk.PrintOperation :allow-async property the operation will run asynchronously if this is supported on the platform. The Gtk.PrintOperation ::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:\n%s",
                                         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.PrintOperation.run() can only be called once on a given Gtk.PrintOperation.

New in version 2.10.

set_allow_async(allow_async)[source]¶

Parameters:	allow_async (`bool`) – `True` to allow asynchronous operation

Sets whether the Gtk.PrintOperation.run() may return before the print operation is completed. Note that some platforms may not allow asynchronous operation.

New in version 2.10.

set_current_page(current_page)[source]¶

Parameters:	current_page (`int`) – the current page, 0-based

Sets the current page.

If this is called before Gtk.PrintOperation.run(), the user will be able to select to print only the current page.

Note that this only makes sense for pre-paginated documents.

New in version 2.10.

set_custom_tab_label(label)[source]¶

Parameters:	label (`str` or `None`) – the label to use, or `None` to use the default label

Sets the label for the tab holding custom widgets.

New in version 2.10.

set_default_page_setup(default_page_setup)[source]¶

Parameters:	default_page_setup (`Gtk.PageSetup` or `None`) – a `Gtk.PageSetup`, or `None`

Makes default_page_setup the default page setup for self.

This page setup will be used by Gtk.PrintOperation.run(), but it can be overridden on a per-page basis by connecting to the Gtk.PrintOperation ::request-page-setup signal.

New in version 2.10.

set_defer_drawing()[source]¶

Sets up the Gtk.PrintOperation to wait for calling of Gtk.PrintOperation.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.

New in version 2.16.

set_embed_page_setup(embed)[source]¶

Parameters:	embed (`bool`) – `True` to embed page setup selection in the #GtkPrintUnixDialog

Embed page size combo box and orientation combo box into page setup page. Selected page setup is stored as default page setup in Gtk.PrintOperation.

New in version 2.18.

set_export_filename(filename)[source]¶

Parameters:	filename (`str`) – the filename for the exported file

Sets up the Gtk.PrintOperation 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.

New in version 2.10.

set_has_selection(has_selection)[source]¶

Parameters:	has_selection (`bool`) – `True` indicates that a selection exists

Sets whether there is a selection to print.

Application has to set number of pages to which the selection will draw by Gtk.PrintOperation.set_n_pages() in a callback of Gtk.PrintOperation ::begin-print.

New in version 2.18.

set_job_name(job_name)[source]¶

Parameters:	job_name (`str`) – a string that identifies 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.

New in version 2.10.

set_n_pages(n_pages)[source]¶

Parameters:	n_pages (`int`) – the number of pages

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 Gtk.PrintOperation ::begin-print signal hander.

Note that the page numbers passed to the Gtk.PrintOperation ::request-page-setup and Gtk.PrintOperation ::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.

New in version 2.10.

set_print_settings(print_settings)[source]¶

Parameters:	print_settings (`Gtk.PrintSettings` or `None`) – `Gtk.PrintSettings`

Sets the print settings for self. This is typically used to re-establish print settings from a previous print operation, see Gtk.PrintOperation.run().

New in version 2.10.

set_show_progress(show_progress)[source]¶

Parameters:	show_progress (`bool`) – `True` to show a progress dialog

If show_progress is True, the print operation will show a progress dialog during the print operation.

New in version 2.10.

set_support_selection(support_selection)[source]¶

Parameters:	support_selection (`bool`) – `True` to support selection

Sets whether selection is supported by Gtk.PrintOperation.

New in version 2.18.

set_track_print_status(track_status)[source]¶

Parameters:	track_status (`bool`) – `True` to track status after printing

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.

New in version 2.10.

set_unit(unit)[source]¶

Parameters:	unit (`Gtk.Unit`) – the unit to use

Sets up the transformation for the cairo context obtained from Gtk.PrintContext in such a way that distances are measured in units of unit.

New in version 2.10.

set_use_full_page(full_page)[source]¶

Parameters:	full_page (`bool`) – `True` to set up the `Gtk.PrintContext` for the full page

If full_page is True, the transformation for the cairo context obtained from Gtk.PrintContext 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).

New in version 2.10.

do_begin_print(context) virtual¶

Parameters:	context (`Gtk.PrintContext`) –

do_custom_widget_apply(widget) virtual¶

Parameters:	widget (`Gtk.Widget`) –

do_done(result) virtual¶

Parameters:	result (`Gtk.PrintOperationResult`) –

do_draw_page(context, page_nr) virtual¶

Parameters:	context (`Gtk.PrintContext`) – page_nr (`int`) –

do_end_print(context) virtual¶

Parameters:	context (`Gtk.PrintContext`) –

do_paginate(context) virtual¶

Parameters:	context (`Gtk.PrintContext`) –
Return type:	`bool`

do_preview(preview, context, parent) virtual¶

Parameters:	preview (`Gtk.PrintOperationPreview`) – context (`Gtk.PrintContext`) – parent (`Gtk.Window`) –
Return type:	`bool`

do_request_page_setup(context, page_nr, setup) virtual¶

Parameters:	context (`Gtk.PrintContext`) – page_nr (`int`) – setup (`Gtk.PageSetup`) –

do_status_changed() virtual¶

do_update_custom_widget(widget, setup, settings) virtual¶

Parameters:	widget (`Gtk.Widget`) – setup (`Gtk.PageSetup`) – settings (`Gtk.PrintSettings`) –

Signal Details¶

Gtk.PrintOperation.signals.begin_print(print_operation, context)¶

Signal Name:	`begin-print`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal context (`Gtk.PrintContext`) – the `Gtk.PrintContext` for the current operation

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 Gtk.PrintContext and paginate the document accordingly, and then set the number of pages with Gtk.PrintOperation.set_n_pages().

New in version 2.10.

Gtk.PrintOperation.signals.create_custom_widget(print_operation)¶

Signal Name:	`create-custom-widget`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal
Returns:	A custom widget that gets embedded in the print dialog, or `None`
Return type:	`GObject.Object`

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 Gtk.PrintOperation ::custom-widget-apply signal is emitted on the operation. Then you can read out any information you need from the widgets.

New in version 2.10.

Gtk.PrintOperation.signals.custom_widget_apply(print_operation, widget)¶

Signal Name:	`custom-widget-apply`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal widget (`Gtk.Widget`) – the custom widget added in create-custom-widget

Emitted right before Gtk.PrintOperation ::begin-print if you added a custom widget in the Gtk.PrintOperation ::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.

New in version 2.10.

Gtk.PrintOperation.signals.done(print_operation, result)¶

Signal Name:	`done`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal result (`Gtk.PrintOperationResult`) – the result of the print operation

Emitted when the print operation run has finished doing everything required for printing.

result gives you information about what happened during the run. If result is Gtk.PrintOperationResult.ERROR then you can call Gtk.PrintOperation.get_error() for more information.

If you enabled print status tracking then Gtk.PrintOperation.is_finished() may still return False after Gtk.PrintOperation ::done was emitted.

New in version 2.10.

Gtk.PrintOperation.signals.draw_page(print_operation, context, page_nr)¶

Signal Name:	`draw-page`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal context (`Gtk.PrintContext`) – the `Gtk.PrintContext` for the current operation page_nr (`int`) – the number of the currently printed page (0-based)

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.PrintContext.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.PrintOperation.set_use_full_page() and Gtk.PrintOperation.set_unit() before starting the print operation to set up the transformation of the cairo context according to your needs.

New in version 2.10.

Gtk.PrintOperation.signals.end_print(print_operation, context)¶

Signal Name:	`end-print`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal context (`Gtk.PrintContext`) – the `Gtk.PrintContext` for the current operation

Emitted after all pages have been rendered. A handler for this signal can clean up any resources that have been allocated in the Gtk.PrintOperation ::begin-print handler.

New in version 2.10.

Gtk.PrintOperation.signals.paginate(print_operation, context)¶

Signal Name:	`paginate`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal context (`Gtk.PrintContext`) – the `Gtk.PrintContext` for the current operation
Returns:	`True` if pagination is complete
Return type:	`bool`

Emitted after the Gtk.PrintOperation ::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.PrintOperation.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.

New in version 2.10.

Gtk.PrintOperation.signals.preview(print_operation, preview, context, parent)¶

Signal Name:	`preview`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal preview (`Gtk.PrintOperationPreview`) – the `Gtk.PrintOperationPreview` for the current operation context (`Gtk.PrintContext`) – the `Gtk.PrintContext` that will be used parent (`Gtk.Window` or `None`) – the `Gtk.Window` to use as window parent, or `None`
Returns:	`True` if the listener wants to take over control of the preview
Return type:	`bool`

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.PrintContext.set_cairo_context().

The custom preview implementation can use Gtk.PrintOperationPreview.is_selected() and Gtk.PrintOperationPreview.render_page() to find pages which are selected for print and render them. The preview must be finished by calling Gtk.PrintOperationPreview.end_preview() (typically in response to the user clicking a close button).

New in version 2.10.

Gtk.PrintOperation.signals.request_page_setup(print_operation, context, page_nr, setup)¶

Signal Name:	`request-page-setup`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal context (`Gtk.PrintContext`) – the `Gtk.PrintContext` for the current operation page_nr (`int`) – the number of the currently printed page (0-based) setup (`Gtk.PageSetup`) – the `Gtk.PageSetup`

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.

New in version 2.10.

Gtk.PrintOperation.signals.status_changed(print_operation)¶

Signal Name:	`status-changed`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal

Emitted at between the various phases of the print operation. See Gtk.PrintStatus for the phases that are being discriminated. Use Gtk.PrintOperation.get_status() to find out the current status.

New in version 2.10.

Gtk.PrintOperation.signals.update_custom_widget(print_operation, widget, setup, settings)¶

Signal Name:	`update-custom-widget`
Flags:	`RUN_LAST`
Parameters:	print_operation (`Gtk.PrintOperation`) – The object which received the signal widget (`Gtk.Widget`) – the custom widget added in create-custom-widget setup (`Gtk.PageSetup`) – actual page setup settings (`Gtk.PrintSettings`) – actual print settings

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.

New in version 2.18.

Property Details¶

Gtk.PrintOperation.props.allow_async¶

Name:	`allow-async`
Type:	`bool`
Default Value:	`False`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

Determines whether the print operation may run asynchronously or not.

Some systems don’t support asynchronous printing, but those that do will return Gtk.PrintOperationResult.IN_PROGRESS as the status, and emit the Gtk.PrintOperation ::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.PrintOperationAction.EXPORT support asynchronous operation.

New in version 2.10.

Gtk.PrintOperation.props.current_page¶

Name:	`current-page`
Type:	`int`
Default Value:	`-1`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

The current page in the document.

If this is set before Gtk.PrintOperation.run(), the user will be able to select to print only the current page.

Note that this only makes sense for pre-paginated documents.

New in version 2.10.

Gtk.PrintOperation.props.custom_tab_label¶

Name:	`custom-tab-label`
Type:	`str`
Default Value:	`None`
Flags:	`READABLE`, `WRITABLE`

Used as the label of the tab containing custom widgets. Note that this property may be ignored on some platforms.

If this is None, GTK+ uses a default label.

New in version 2.10.

Gtk.PrintOperation.props.default_page_setup¶

Name:	`default-page-setup`
Type:	`Gtk.PageSetup`
Default Value:	`None`
Flags:	`READABLE`, `WRITABLE`

The Gtk.PageSetup used by default.

This page setup will be used by Gtk.PrintOperation.run(), but it can be overridden on a per-page basis by connecting to the Gtk.PrintOperation ::request-page-setup signal.

New in version 2.10.

Gtk.PrintOperation.props.embed_page_setup¶

Name:	`embed-page-setup`
Type:	`bool`
Default Value:	`False`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

If True, page size combo box and orientation combo box are embedded into page setup page.

New in version 2.18.

Gtk.PrintOperation.props.export_filename¶

Name:	`export-filename`
Type:	`str`
Default Value:	`None`
Flags:	`READABLE`, `WRITABLE`

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.

New in version 2.10.

Gtk.PrintOperation.props.has_selection¶

Name:	`has-selection`
Type:	`bool`
Default Value:	`False`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

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.

New in version 2.18.

Gtk.PrintOperation.props.job_name¶

Name:	`job-name`
Type:	`str`
Default Value:	`''`
Flags:	`READABLE`, `WRITABLE`

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.

New in version 2.10.

Gtk.PrintOperation.props.n_pages¶

Name:	`n-pages`
Type:	`int`
Default Value:	`-1`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

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 Gtk.PrintOperation ::begin-print signal hander.

Note that the page numbers passed to the Gtk.PrintOperation ::request-page-setup and Gtk.PrintOperation ::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.

New in version 2.10.

Gtk.PrintOperation.props.n_pages_to_print¶

Name:	`n-pages-to-print`
Type:	`int`
Default Value:	`-1`
Flags:	`READABLE`, `EXPLICIT_NOTIFY`

The number of pages that will be printed.

Note that this value is set during print preparation phase (Gtk.PrintStatus.PREPARING), so this value should never be get before the data generation phase (Gtk.PrintStatus.GENERATING_DATA). You can connect to the Gtk.PrintOperation ::status-changed signal and call Gtk.PrintOperation.get_n_pages_to_print() when print status is Gtk.PrintStatus.GENERATING_DATA. This is typically used to track the progress of print operation.

New in version 2.18.

Gtk.PrintOperation.props.print_settings¶

Name:	`print-settings`
Type:	`Gtk.PrintSettings`
Default Value:	`None`
Flags:	`READABLE`, `WRITABLE`

The Gtk.PrintSettings used for initializing the dialog.

Setting this property is typically used to re-establish print settings from a previous print operation, see Gtk.PrintOperation.run().

New in version 2.10.

Gtk.PrintOperation.props.show_progress¶

Name:	`show-progress`
Type:	`bool`
Default Value:	`False`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

Determines whether to show a progress dialog during the print operation.

New in version 2.10.

Gtk.PrintOperation.props.status¶

Name:	`status`
Type:	`Gtk.PrintStatus`
Default Value:	`Gtk.PrintStatus.INITIAL`
Flags:	`READABLE`, `EXPLICIT_NOTIFY`

The status of the print operation.

New in version 2.10.

Gtk.PrintOperation.props.status_string¶

Name:	`status-string`
Type:	`str`
Default Value:	`''`
Flags:	`READABLE`

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 Gtk.Statusbar.

See the Gtk.PrintOperation :status property for a status value that is suitable for programmatic use.

New in version 2.10.

Gtk.PrintOperation.props.support_selection¶

Name:	`support-selection`
Type:	`bool`
Default Value:	`False`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

If True, the print operation will support print of selection. This allows the print dialog to show a “Selection” button.

New in version 2.18.

Gtk.PrintOperation.props.track_print_status¶

Name:	`track-print-status`
Type:	`bool`
Default Value:	`False`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

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.

New in version 2.10.

Gtk.PrintOperation.props.unit¶

Name:	`unit`
Type:	`Gtk.Unit`
Default Value:	`Gtk.Unit.NONE`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

The transformation for the cairo context obtained from Gtk.PrintContext is set up in such a way that distances are measured in units of unit.

New in version 2.10.

Gtk.PrintOperation.props.use_full_page¶

Name:	`use-full-page`
Type:	`bool`
Default Value:	`False`
Flags:	`READABLE`, `WRITABLE`, `EXPLICIT_NOTIFY`

If True, the transformation for the cairo context obtained from Gtk.PrintContext 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).

New in version 2.10.