glib/demo/images.c - third_party/poppler - Git at Google

 /*
  * Copyright (C) 2008 Carlos Garcia Campos  <carlosgc@gnome.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2, or (at your option)
  * any later version.
  *
  * This program 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 General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  */

 #include "config.h"

 #include <gtk/gtk.h>

 #include "images.h"

 enum {
 	IMAGES_ID_COLUMN,
 	IMAGES_X1_COLUMN,
 	IMAGES_Y1_COLUMN,
 	IMAGES_X2_COLUMN,
 	IMAGES_Y2_COLUMN,
 	N_COLUMNS
 };

 typedef struct {
 	PopplerDocument *doc;

 	GtkListStore    *model;
 	GtkWidget       *timer_label;
 	GtkWidget       *image_view;

 	gint             page;
 } PgdImagesDemo;

 static void
 pgd_images_free (PgdImagesDemo *demo)
 {
 	if (!demo)
 		return;

 	if (demo->doc) {
 		g_object_unref (demo->doc);
 		demo->doc = NULL;
 	}

 	if (demo->model) {
 		g_object_unref (demo->model);
 		demo->model = NULL;
 	}

 	g_free (demo);
 }

 static gboolean
 pgd_image_view_drawing_area_draw (GtkWidget *area,
                                   cairo_t   *cr,
                                   GtkWidget *image_view)
 {
 	cairo_surface_t *image;

 	image = g_object_get_data (G_OBJECT (image_view), "image-surface");
 	if (!image)
 		return FALSE;

 	gtk_widget_set_size_request (area,
 				     cairo_image_surface_get_width (image),
 				     cairo_image_surface_get_height (image));

 	cairo_set_source_surface (cr, image, 0, 0);
 	cairo_paint (cr);

 	return TRUE;
 }

 static GtkWidget *
 pgd_image_view_new ()
 {
 	GtkWidget *swindow;
 	GtkWidget *darea;

 	swindow = gtk_scrolled_window_new (NULL, NULL);

 	darea = gtk_drawing_area_new ();
 	g_signal_connect (G_OBJECT (darea), "draw",
 			  G_CALLBACK (pgd_image_view_drawing_area_draw),
 			  (gpointer)swindow);
 	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 					GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 #if GTK_CHECK_VERSION(3, 7, 8)
 	gtk_container_add(GTK_CONTAINER(swindow), darea);
 #else
 	gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (swindow),
 					       darea);
 #endif
 	gtk_widget_show (darea);

 	return swindow;
 }

 static void
 pgd_image_view_set_image (GtkWidget       *image_view,
 			  cairo_surface_t *image)
 {
 	g_object_set_data_full (G_OBJECT (image_view), "image-surface",
 				image,
 				(GDestroyNotify)cairo_surface_destroy);
 	gtk_widget_queue_draw (image_view);
 }

 static void
 pgd_images_get_images (GtkWidget     *button,
 		       PgdImagesDemo *demo)
 {
 	PopplerPage *page;
 	GList       *mapping, *l;
 	gint         n_images;
 	GTimer      *timer;

 	gtk_list_store_clear (demo->model);
 	pgd_image_view_set_image (demo->image_view, NULL);

 	page = poppler_document_get_page (demo->doc, demo->page);
 	if (!page)
 		return;

 	timer = g_timer_new ();
 	mapping = poppler_page_get_image_mapping (page);
 	g_timer_stop (timer);

 	n_images = g_list_length (mapping);
 	if (n_images > 0) {
 		gchar *str;

 		str = g_strdup_printf ("<i>%d images found in %.4f seconds</i>",
 				       n_images, g_timer_elapsed (timer, NULL));
 		gtk_label_set_markup (GTK_LABEL (demo->timer_label), str);
 		g_free (str);
 	} else {
 		gtk_label_set_markup (GTK_LABEL (demo->timer_label), "<i>No images found</i>");
 	}

 	g_timer_destroy (timer);

 	for (l = mapping; l; l = g_list_next (l)) {
 		PopplerImageMapping *imapping;
 		GtkTreeIter          iter;
 		gchar               *x1, *y1, *x2, *y2;

 		imapping = (PopplerImageMapping *)l->data;

 		x1 = g_strdup_printf ("%.2f", imapping->area.x1);
 		y1 = g_strdup_printf ("%.2f", imapping->area.y1);
 		x2 = g_strdup_printf ("%.2f", imapping->area.x2);
 		y2 = g_strdup_printf ("%.2f", imapping->area.y2);

 		gtk_list_store_append (demo->model, &iter);
 		gtk_list_store_set (demo->model, &iter,
 				    IMAGES_ID_COLUMN, imapping->image_id,
 				    IMAGES_X1_COLUMN, x1,
 				    IMAGES_Y1_COLUMN, y1,
 				    IMAGES_X2_COLUMN, x2,
 				    IMAGES_Y2_COLUMN, y2,
 				    -1);
 		g_free (x1);
 		g_free (y1);
 		g_free (x2);
 		g_free (y2);
 	}

 	poppler_page_free_image_mapping (mapping);
 	g_object_unref (page);
 }

 static void
 pgd_images_page_selector_value_changed (GtkSpinButton *spinbutton,
 					PgdImagesDemo *demo)
 {
 	demo->page = (gint)gtk_spin_button_get_value (spinbutton) - 1;
 }

 static void
 pgd_images_selection_changed (GtkTreeSelection *treeselection,
 			      PgdImagesDemo    *demo)
 {
 	GtkTreeModel *model;
 	GtkTreeIter   iter;

 	if (gtk_tree_selection_get_selected (treeselection, &model, &iter)) {
 		PopplerPage *page;
 		gint         image_id;

 		gtk_tree_model_get (model, &iter,
 				    IMAGES_ID_COLUMN, &image_id,
 				    -1);
 		page = poppler_document_get_page (demo->doc, demo->page);
 		pgd_image_view_set_image (demo->image_view,
 					  poppler_page_get_image (page, image_id));
 		g_object_unref (page);

 	}
 }

 GtkWidget *
 pgd_images_create_widget (PopplerDocument *document)
 {
 	PgdImagesDemo    *demo;
 	GtkWidget        *label;
 	GtkWidget        *vbox;
 	GtkWidget        *hbox, *page_selector;
 	GtkWidget        *button;
 	GtkWidget        *hpaned;
 	GtkWidget        *swindow, *treeview;
 	GtkTreeSelection *selection;
 	GtkCellRenderer  *renderer;
 	gchar            *str;
 	gint              n_pages;

 	demo = g_new0 (PgdImagesDemo, 1);

 	demo->doc = g_object_ref (document);

 	n_pages = poppler_document_get_n_pages (document);

 	vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);

 	hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);

 	label = gtk_label_new ("Page:");
 	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
 	gtk_widget_show (label);

 	page_selector = gtk_spin_button_new_with_range (1, n_pages, 1);
 	g_signal_connect (G_OBJECT (page_selector), "value-changed",
 			  G_CALLBACK (pgd_images_page_selector_value_changed),
 			  (gpointer)demo);
 	gtk_box_pack_start (GTK_BOX (hbox), page_selector, FALSE, TRUE, 0);
 	gtk_widget_show (page_selector);

 	str = g_strdup_printf ("of %d", n_pages);
 	label = gtk_label_new (str);
 	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
 	gtk_widget_show (label);
 	g_free (str);

 	button = gtk_button_new_with_label ("Get Images");
 	g_signal_connect (G_OBJECT (button), "clicked",
 			  G_CALLBACK (pgd_images_get_images),
 			  (gpointer)demo);
 	gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
 	gtk_widget_show (button);

 	gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, TRUE, 0);
 	gtk_widget_show (hbox);

 	demo->timer_label = gtk_label_new (NULL);
 	gtk_label_set_markup (GTK_LABEL (demo->timer_label), "<i>No images found</i>");
 	g_object_set (G_OBJECT (demo->timer_label), "xalign", 1.0, NULL);
 	gtk_box_pack_start (GTK_BOX (vbox), demo->timer_label, FALSE, TRUE, 0);
 	gtk_widget_show (demo->timer_label);

 	hpaned = gtk_paned_new (GTK_ORIENTATION_HORIZONTAL);

 	demo->image_view = pgd_image_view_new ();

 	swindow = gtk_scrolled_window_new (NULL, NULL);
 	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 					GTK_POLICY_AUTOMATIC,
 					GTK_POLICY_AUTOMATIC);

 	demo->model = gtk_list_store_new (N_COLUMNS, G_TYPE_INT,
 					  G_TYPE_STRING, G_TYPE_STRING,
 					  G_TYPE_STRING, G_TYPE_STRING);
 	treeview = gtk_tree_view_new_with_model (GTK_TREE_MODEL (demo->model));

 	renderer = gtk_cell_renderer_text_new ();
 	renderer = gtk_cell_renderer_text_new ();
 	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
 						     0, "Image",
 						     renderer,
 						     "text", IMAGES_ID_COLUMN,
 						     NULL);

 	renderer = gtk_cell_renderer_text_new ();
 	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
 						     1, "X1",
 						     renderer,
 						     "text", IMAGES_X1_COLUMN,
 						     NULL);
 	renderer = gtk_cell_renderer_text_new ();
 	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
 						     2, "Y1",
 						     renderer,
 						     "text", IMAGES_Y1_COLUMN,
 						     NULL);
 	renderer = gtk_cell_renderer_text_new ();
 	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
 						     3, "X2",
 						     renderer,
 						     "text", IMAGES_X2_COLUMN,
 						     NULL);
 	renderer = gtk_cell_renderer_text_new ();
 	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
 						     4, "Y2",
 						     renderer,
 						     "text", IMAGES_Y2_COLUMN,
 						     NULL);

 	selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview));
 	g_signal_connect (G_OBJECT (selection), "changed",
 			  G_CALLBACK (pgd_images_selection_changed),
 			  (gpointer)demo);

 	gtk_container_add (GTK_CONTAINER (swindow), treeview);
 	gtk_widget_show (treeview);

 	gtk_paned_add1 (GTK_PANED (hpaned), swindow);
 	gtk_widget_show (swindow);

 	gtk_paned_add2 (GTK_PANED (hpaned), demo->image_view);
 	gtk_widget_show (demo->image_view);

 	gtk_paned_set_position (GTK_PANED (hpaned), 300);

 	gtk_box_pack_start (GTK_BOX (vbox), hpaned, TRUE, TRUE, 0);
 	gtk_widget_show (hpaned);

 	g_object_weak_ref (G_OBJECT (vbox),
 			   (GWeakNotify)pgd_images_free,
 			   demo);

 	return vbox;
 }
	/*
	* Copyright (C) 2008 Carlos Garcia Campos <carlosgc@gnome.org>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2, or (at your option)
	* any later version.
	*
	* This program 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 General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
	*/

	#include "config.h"

	#include <gtk/gtk.h>

	#include "images.h"

	enum {
	IMAGES_ID_COLUMN,
	IMAGES_X1_COLUMN,
	IMAGES_Y1_COLUMN,
	IMAGES_X2_COLUMN,
	IMAGES_Y2_COLUMN,
	N_COLUMNS
	};

	typedef struct {
	PopplerDocument *doc;

	GtkListStore *model;
	GtkWidget *timer_label;
	GtkWidget *image_view;

	gint page;
	} PgdImagesDemo;

	static void
	pgd_images_free (PgdImagesDemo *demo)
	{
	if (!demo)
	return;

	if (demo->doc) {
	g_object_unref (demo->doc);
	demo->doc = NULL;
	}

	if (demo->model) {
	g_object_unref (demo->model);
	demo->model = NULL;
	}

	g_free (demo);
	}

	static gboolean
	pgd_image_view_drawing_area_draw (GtkWidget *area,
	cairo_t *cr,
	GtkWidget *image_view)
	{
	cairo_surface_t *image;

	image = g_object_get_data (G_OBJECT (image_view), "image-surface");
	if (!image)
	return FALSE;

	gtk_widget_set_size_request (area,
	cairo_image_surface_get_width (image),
	cairo_image_surface_get_height (image));

	cairo_set_source_surface (cr, image, 0, 0);
	cairo_paint (cr);

	return TRUE;
	}

	static GtkWidget *
	pgd_image_view_new ()
	{
	GtkWidget *swindow;
	GtkWidget *darea;

	swindow = gtk_scrolled_window_new (NULL, NULL);

	darea = gtk_drawing_area_new ();
	g_signal_connect (G_OBJECT (darea), "draw",
	G_CALLBACK (pgd_image_view_drawing_area_draw),
	(gpointer)swindow);
	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
	GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	#if GTK_CHECK_VERSION(3, 7, 8)
	gtk_container_add(GTK_CONTAINER(swindow), darea);
	#else
	gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (swindow),
	darea);
	#endif
	gtk_widget_show (darea);

	return swindow;
	}

	static void
	pgd_image_view_set_image (GtkWidget *image_view,
	cairo_surface_t *image)
	{
	g_object_set_data_full (G_OBJECT (image_view), "image-surface",
	image,
	(GDestroyNotify)cairo_surface_destroy);
	gtk_widget_queue_draw (image_view);
	}

	static void
	pgd_images_get_images (GtkWidget *button,
	PgdImagesDemo *demo)
	{
	PopplerPage *page;
	GList mapping, l;
	gint n_images;
	GTimer *timer;

	gtk_list_store_clear (demo->model);
	pgd_image_view_set_image (demo->image_view, NULL);

	page = poppler_document_get_page (demo->doc, demo->page);
	if (!page)
	return;

	timer = g_timer_new ();
	mapping = poppler_page_get_image_mapping (page);
	g_timer_stop (timer);

	n_images = g_list_length (mapping);
	if (n_images > 0) {
	gchar *str;

	str = g_strdup_printf ("<i>%d images found in %.4f seconds</i>",
	n_images, g_timer_elapsed (timer, NULL));
	gtk_label_set_markup (GTK_LABEL (demo->timer_label), str);
	g_free (str);
	} else {
	gtk_label_set_markup (GTK_LABEL (demo->timer_label), "<i>No images found</i>");
	}

	g_timer_destroy (timer);

	for (l = mapping; l; l = g_list_next (l)) {
	PopplerImageMapping *imapping;
	GtkTreeIter iter;
	gchar x1, y1, x2, y2;

	imapping = (PopplerImageMapping *)l->data;

	x1 = g_strdup_printf ("%.2f", imapping->area.x1);
	y1 = g_strdup_printf ("%.2f", imapping->area.y1);
	x2 = g_strdup_printf ("%.2f", imapping->area.x2);
	y2 = g_strdup_printf ("%.2f", imapping->area.y2);

	gtk_list_store_append (demo->model, &iter);
	gtk_list_store_set (demo->model, &iter,
	IMAGES_ID_COLUMN, imapping->image_id,
	IMAGES_X1_COLUMN, x1,
	IMAGES_Y1_COLUMN, y1,
	IMAGES_X2_COLUMN, x2,
	IMAGES_Y2_COLUMN, y2,
	-1);
	g_free (x1);
	g_free (y1);
	g_free (x2);
	g_free (y2);
	}

	poppler_page_free_image_mapping (mapping);
	g_object_unref (page);
	}

	static void
	pgd_images_page_selector_value_changed (GtkSpinButton *spinbutton,
	PgdImagesDemo *demo)
	{
	demo->page = (gint)gtk_spin_button_get_value (spinbutton) - 1;
	}

	static void
	pgd_images_selection_changed (GtkTreeSelection *treeselection,
	PgdImagesDemo *demo)
	{
	GtkTreeModel *model;
	GtkTreeIter iter;

	if (gtk_tree_selection_get_selected (treeselection, &model, &iter)) {
	PopplerPage *page;
	gint image_id;

	gtk_tree_model_get (model, &iter,
	IMAGES_ID_COLUMN, &image_id,
	-1);
	page = poppler_document_get_page (demo->doc, demo->page);
	pgd_image_view_set_image (demo->image_view,
	poppler_page_get_image (page, image_id));
	g_object_unref (page);

	}
	}

	GtkWidget *
	pgd_images_create_widget (PopplerDocument *document)
	{
	PgdImagesDemo *demo;
	GtkWidget *label;
	GtkWidget *vbox;
	GtkWidget hbox, page_selector;
	GtkWidget *button;
	GtkWidget *hpaned;
	GtkWidget swindow, treeview;
	GtkTreeSelection *selection;
	GtkCellRenderer *renderer;
	gchar *str;
	gint n_pages;

	demo = g_new0 (PgdImagesDemo, 1);

	demo->doc = g_object_ref (document);

	n_pages = poppler_document_get_n_pages (document);

	vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);

	hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);

	label = gtk_label_new ("Page:");
	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
	gtk_widget_show (label);

	page_selector = gtk_spin_button_new_with_range (1, n_pages, 1);
	g_signal_connect (G_OBJECT (page_selector), "value-changed",
	G_CALLBACK (pgd_images_page_selector_value_changed),
	(gpointer)demo);
	gtk_box_pack_start (GTK_BOX (hbox), page_selector, FALSE, TRUE, 0);
	gtk_widget_show (page_selector);

	str = g_strdup_printf ("of %d", n_pages);
	label = gtk_label_new (str);
	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
	gtk_widget_show (label);
	g_free (str);

	button = gtk_button_new_with_label ("Get Images");
	g_signal_connect (G_OBJECT (button), "clicked",
	G_CALLBACK (pgd_images_get_images),
	(gpointer)demo);
	gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
	gtk_widget_show (button);

	gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, TRUE, 0);
	gtk_widget_show (hbox);

	demo->timer_label = gtk_label_new (NULL);
	gtk_label_set_markup (GTK_LABEL (demo->timer_label), "<i>No images found</i>");
	g_object_set (G_OBJECT (demo->timer_label), "xalign", 1.0, NULL);
	gtk_box_pack_start (GTK_BOX (vbox), demo->timer_label, FALSE, TRUE, 0);
	gtk_widget_show (demo->timer_label);

	hpaned = gtk_paned_new (GTK_ORIENTATION_HORIZONTAL);

	demo->image_view = pgd_image_view_new ();

	swindow = gtk_scrolled_window_new (NULL, NULL);
	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
	GTK_POLICY_AUTOMATIC,
	GTK_POLICY_AUTOMATIC);

	demo->model = gtk_list_store_new (N_COLUMNS, G_TYPE_INT,
	G_TYPE_STRING, G_TYPE_STRING,
	G_TYPE_STRING, G_TYPE_STRING);
	treeview = gtk_tree_view_new_with_model (GTK_TREE_MODEL (demo->model));

	renderer = gtk_cell_renderer_text_new ();
	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
	0, "Image",
	renderer,
	"text", IMAGES_ID_COLUMN,
	NULL);

	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
	1, "X1",
	renderer,
	"text", IMAGES_X1_COLUMN,
	NULL);
	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
	2, "Y1",
	renderer,
	"text", IMAGES_Y1_COLUMN,
	NULL);
	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
	3, "X2",
	renderer,
	"text", IMAGES_X2_COLUMN,
	NULL);
	renderer = gtk_cell_renderer_text_new ();
	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
	4, "Y2",
	renderer,
	"text", IMAGES_Y2_COLUMN,
	NULL);

	selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview));
	g_signal_connect (G_OBJECT (selection), "changed",
	G_CALLBACK (pgd_images_selection_changed),
	(gpointer)demo);

	gtk_container_add (GTK_CONTAINER (swindow), treeview);
	gtk_widget_show (treeview);

	gtk_paned_add1 (GTK_PANED (hpaned), swindow);
	gtk_widget_show (swindow);

	gtk_paned_add2 (GTK_PANED (hpaned), demo->image_view);
	gtk_widget_show (demo->image_view);

	gtk_paned_set_position (GTK_PANED (hpaned), 300);

	gtk_box_pack_start (GTK_BOX (vbox), hpaned, TRUE, TRUE, 0);
	gtk_widget_show (hpaned);

	g_object_weak_ref (G_OBJECT (vbox),
	(GWeakNotify)pgd_images_free,
	demo);

	return vbox;
	}