Signal
Gtk.PrintOperation::preview
Declaration
gboolean
preview (
  GtkPrintOperation self,
  GtkPrintOperationPreview* preview,
  GtkPrintContext* context,
  GtkWindow* parent,
  gpointer user_data
)
Description [src]
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).
| Default handler: | The default handler is called after the handlers added via  | 
Parameters
| preview | GtkPrintOperationPreview | 
| the  | |
| Ownership is not transferred to the callee | |
| context | GtkPrintContext | 
| the  | |
| Ownership is not transferred to the callee | |
| parent | GtkWindow | 
| the  | |
| Can be NULL | |
| Ownership is not transferred to the callee |