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/* GTK - The GIMP Toolkit
* gtkprintoperationpreview.c: Abstract print preview interface
* Copyright (C) 2006, Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkprintoperationpreview.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
/**
* GtkPrintOperationPreview:
*
* `GtkPrintOperationPreview` is the interface that is used to
* implement print preview.
*
* A `GtkPrintOperationPreview` object is passed to the
* [signal@Gtk.PrintOperation::preview] signal by
* [class@Gtk.PrintOperation].
*/
static void gtk_print_operation_preview_base_init (gpointer g_iface);
GType
gtk_print_operation_preview_get_type (void)
{
static GType print_operation_preview_type = 0;
if (!print_operation_preview_type)
{
const GTypeInfo print_operation_preview_info =
{
sizeof (GtkPrintOperationPreviewIface), /* class_size */
gtk_print_operation_preview_base_init, /* base_init */
NULL, /* base_finalize */
NULL,
NULL, /* class_finalize */
NULL, /* class_data */
0,
0, /* n_preallocs */
NULL
};
print_operation_preview_type =
g_type_register_static (G_TYPE_INTERFACE, I_("GtkPrintOperationPreview"),
&print_operation_preview_info, 0);
g_type_interface_add_prerequisite (print_operation_preview_type, G_TYPE_OBJECT);
}
return print_operation_preview_type;
}
static void
gtk_print_operation_preview_base_init (gpointer g_iface)
{
static gboolean initialized = FALSE;
if (!initialized)
{
unsigned int id;
/**
* GtkPrintOperationPreview::ready:
* @preview: the object on which the signal is emitted
* @context: the current `GtkPrintContext`
*
* 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.
*/
g_signal_new (I_("ready"),
GTK_TYPE_PRINT_OPERATION_PREVIEW,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintOperationPreviewIface, ready),
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
GTK_TYPE_PRINT_CONTEXT);
/**
* GtkPrintOperationPreview::got-page-size:
* @preview: the object on which the signal is emitted
* @context: the current `GtkPrintContext`
* @page_setup: the `GtkPageSetup` for the current page
*
* 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 [method@Gtk.PrintContext.set_cairo_context].
*/
id = g_signal_new (I_("got-page-size"),
GTK_TYPE_PRINT_OPERATION_PREVIEW,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPrintOperationPreviewIface, got_page_size),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_PRINT_CONTEXT,
GTK_TYPE_PAGE_SETUP);
g_signal_set_va_marshaller (id,
GTK_TYPE_PRINT_OPERATION_PREVIEW,
_gtk_marshal_VOID__OBJECT_OBJECTv);
initialized = TRUE;
}
}
/**
* gtk_print_operation_preview_render_page:
* @preview: a `GtkPrintOperationPreview`
* @page_nr: the page to render
*
* Renders a page to the preview.
*
* This is using the print context that was passed to the
* [signal@Gtk.PrintOperation::preview] handler together
* with @preview.
*
* A custom print preview should use this function to render
* the currently selected page.
*
* Note that this function requires a suitable cairo context to
* be associated with the print context.
*/
void
gtk_print_operation_preview_render_page (GtkPrintOperationPreview *preview,
int page_nr)
{
g_return_if_fail (GTK_IS_PRINT_OPERATION_PREVIEW (preview));
GTK_PRINT_OPERATION_PREVIEW_GET_IFACE (preview)->render_page (preview,
page_nr);
}
/**
* gtk_print_operation_preview_end_preview:
* @preview: a `GtkPrintOperationPreview`
*
* Ends a preview.
*
* This function must be called to finish a custom print preview.
*/
void
gtk_print_operation_preview_end_preview (GtkPrintOperationPreview *preview)
{
g_return_if_fail (GTK_IS_PRINT_OPERATION_PREVIEW (preview));
GTK_PRINT_OPERATION_PREVIEW_GET_IFACE (preview)->end_preview (preview);
}
/**
* gtk_print_operation_preview_is_selected:
* @preview: a `GtkPrintOperationPreview`
* @page_nr: a page number
*
* Returns whether the given page is included in the set of pages that
* have been selected for printing.
*
* Returns: %TRUE if the page has been selected for printing
*/
gboolean
gtk_print_operation_preview_is_selected (GtkPrintOperationPreview *preview,
int page_nr)
{
g_return_val_if_fail (GTK_IS_PRINT_OPERATION_PREVIEW (preview), FALSE);
return GTK_PRINT_OPERATION_PREVIEW_GET_IFACE (preview)->is_selected (preview, page_nr);
}
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