src/rakt-window.c

   1 /*
   2  * Copyright (C) 2007 Tilman Sauerbeck (tilman at code-monkey de)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public
  15  * License along with this program; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include <gtk/gtk.h>
  25 #include <poppler.h>
  26
  27 #include <limits.h>
  28 #include <stdlib.h>
  29 #include <stdbool.h>
  30
  31 #include "rakt-window.h"
  32
  33 typedef struct {
  34         GtkWidget *content_vbox;
  35
  36         /* Menu & toolbar */
  37         GtkUIManager *ui_manager;
  38         GtkAction *action_prev;
  39         GtkAction *action_next;
  40
  41         GtkWidget *image;
  42         GdkPixbuf *pixbuf;
  43         PopplerDocument *document;
  44         gint page_no;
  45 } RaktWindowPriv;
  46
  47 static void window_finalize (GObject *object);
  48
  49 static void on_add_widget (GtkUIManager *merge, GtkWidget *widget, RaktWindow *window);
  50
  51 static void on_action_quit (GtkAction *action, RaktWindow *window);
  52 static void on_action_open (GtkAction *action, RaktWindow *window);
  53 static void on_action_go_next (GtkAction *action, RaktWindow *window);
  54 static void on_action_go_previous (GtkAction *action, RaktWindow *window);
  55 static void on_action_about (GtkAction *action, RaktWindow *window);
  56
  57 static const GtkActionEntry action_entries[] = {
  58         {
  59                 "FileMenu", NULL, "_File", NULL, NULL, NULL
  60         },
  61         {
  62                 "GoMenu", NULL, "_Go", NULL, NULL, NULL
  63         },
  64         {
  65                 "HelpMenu", NULL, "_Help", NULL, NULL, NULL
  66         },
  67         {
  68                 "Open", GTK_STOCK_OPEN, "_Open",
  69                 "<control>O", "Open a PDF file",
  70                 G_CALLBACK (on_action_open)
  71         },
  72         {
  73                 "Next", GTK_STOCK_GO_FORWARD, "_Next",
  74                 "<control>n", "Next",
  75                 G_CALLBACK (on_action_go_next)
  76         },
  77         {
  78                 "Previous", GTK_STOCK_GO_BACK, "_Previous",
  79                 "<control>p", "Previous",
  80                 G_CALLBACK (on_action_go_previous)
  81         },
  82         {
  83                 "Quit", GTK_STOCK_QUIT, "_Quit",
  84                 "<control>Q", "Quit the application",
  85                 G_CALLBACK (on_action_quit)
  86         },
  87         {
  88                 "About", GTK_STOCK_ABOUT, "_About",
  89                 NULL, "About this application",
  90                 G_CALLBACK (on_action_about)
  91         }
  92 };
  93
  94 static const gchar *ui_layout =
  95         "<ui>"
  96         "       <menubar name='MenuBar'>"
  97         "               <menu action='FileMenu'>"
  98         "                       <menuitem action='Open'/>"
  99         "                       <separator action='Sep1'/>"
 100         "                       <menuitem action='Quit'/>"
 101         "               </menu>"
 102         "               <menu action='GoMenu'>"
 103         "                       <menuitem action='Previous'/>"
 104         "                       <menuitem action='Next'/>"
 105         "               </menu>"
 106         "               <menu action='HelpMenu'>"
 107         "                       <menuitem action='About'/>"
 108         "               </menu>"
 109         "       </menubar>"
 110         "       <toolbar name='ToolBar'>"
 111         "               <toolitem action='Open'/>"
 112         "               <toolitem action='Previous'/>"
 113         "               <toolitem action='Next'/>"
 114         "       </toolbar>"
 115         "</ui>";
 116
 117 G_DEFINE_TYPE (RaktWindow, rakt_window, GTK_TYPE_WINDOW)
 118
 119 #define GET_PRIV(obj) \
 120         (G_TYPE_INSTANCE_GET_PRIVATE ((obj), RAKT_TYPE_WINDOW, RaktWindowPriv))
 121
 122 static void
 123 rakt_window_class_init (RaktWindowClass *class)
 124 {
 125         GObjectClass *object_class = G_OBJECT_CLASS (class);
 126
 127         object_class->finalize = window_finalize;
 128
 129         g_type_class_add_private (object_class, sizeof (RaktWindowPriv));
 130 }
 131
 132 static void
 133 render_page (RaktWindow *window)
 134 {
 135         RaktWindowPriv *priv;
 136         PopplerPage *page;
 137         double tmpw, tmph;
 138         int width, height, n_pages;
 139
 140         priv = GET_PRIV (window);
 141
 142         n_pages = poppler_document_get_n_pages (priv->document);
 143         gtk_action_set_sensitive (priv->action_prev, priv->page_no > 0);
 144         gtk_action_set_sensitive (priv->action_next, priv->page_no < n_pages);
 145
 146         page = poppler_document_get_page (priv->document, priv->page_no);
 147
 148         poppler_page_get_size (page, &tmpw, &tmph);
 149
 150         width = (int) tmpw;
 151         height = (int) tmph;
 152
 153         priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
 154                                        width, height);
 155
 156         poppler_page_render_to_pixbuf (page, 0, 0, width, height, 1.0, 0,
 157                                        priv->pixbuf);
 158         gtk_image_set_from_pixbuf (GTK_IMAGE (priv->image), priv->pixbuf);
 159 }
 160
 161 static void
 162 open_document (RaktWindow *window, gchar *uri)
 163 {
 164         RaktWindowPriv *priv;
 165         GError *error = NULL;
 166
 167         priv = GET_PRIV (window);
 168
 169         priv->document = poppler_document_new_from_file (uri, NULL, &error);
 170
 171         priv->page_no = 0;
 172         render_page (window);
 173 }
 174
 175 static void
 176 window_create_menu (RaktWindow *window)
 177 {
 178         RaktWindowPriv *priv;
 179         GtkActionGroup *action_group;
 180         GtkAccelGroup *accel_group;
 181         GError *error = NULL;
 182
 183         priv = GET_PRIV (window);
 184
 185         priv->ui_manager = gtk_ui_manager_new ();
 186
 187         g_signal_connect (priv->ui_manager,
 188                           "add_widget",
 189                           G_CALLBACK (on_add_widget),
 190                           window);
 191
 192         action_group = gtk_action_group_new ("Actions");
 193         gtk_action_group_add_actions (action_group, action_entries,
 194                                       G_N_ELEMENTS (action_entries), window);
 195         gtk_ui_manager_insert_action_group (priv->ui_manager, action_group, 0);
 196
 197         accel_group = gtk_ui_manager_get_accel_group (priv->ui_manager);
 198         gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
 199
 200         g_object_unref (action_group);
 201
 202         gtk_ui_manager_add_ui_from_string (priv->ui_manager, ui_layout, -1, &error);
 203
 204         if (error)
 205                 g_error ("Couldn't create UI: %s\n", error->message);
 206
 207         gtk_ui_manager_ensure_update (priv->ui_manager);
 208
 209         priv->action_prev = gtk_ui_manager_get_action (priv->ui_manager,
 210                                                        "ui/ToolBar/Previous");
 211         priv->action_next = gtk_ui_manager_get_action (priv->ui_manager,
 212                                                        "ui/ToolBar/Next");
 213
 214         gtk_action_set_sensitive (priv->action_prev, false);
 215         gtk_action_set_sensitive (priv->action_next, false);
 216 }
 217
 218 static gboolean
 219 on_delete_event (GtkWidget *widget, GdkEvent *event, gpointer user_data)
 220 {
 221         gtk_main_quit ();
 222
 223         return TRUE;
 224 }
 225
 226 static void
 227 rakt_window_init (RaktWindow *window)
 228 {
 229         RaktWindowPriv *priv;
 230
 231         priv = GET_PRIV (window);
 232
 233         gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
 234         gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);
 235
 236         priv->content_vbox = gtk_vbox_new (FALSE, 0);
 237         gtk_widget_show (priv->content_vbox);
 238         gtk_container_add (GTK_CONTAINER (window), priv->content_vbox);
 239
 240         window_create_menu (window);
 241
 242         priv->image = gtk_image_new ();
 243
 244         gtk_widget_show (priv->image);
 245         gtk_box_pack_start (GTK_BOX (priv->content_vbox), priv->image,
 246                             TRUE, TRUE, 0);
 247
 248         g_signal_connect (GTK_WINDOW (window), "delete-event",
 249                           G_CALLBACK (on_delete_event), NULL);
 250 }
 251
 252 static void
 253 window_finalize (GObject *object)
 254 {
 255         RaktWindowPriv *priv;
 256
 257         priv = GET_PRIV (object);
 258
 259         g_object_unref (priv->ui_manager);
 260
 261         G_OBJECT_CLASS (rakt_window_parent_class)->finalize (object);
 262 }
 263
 264 static void
 265 on_add_widget (GtkUIManager *merge, GtkWidget *widget, RaktWindow *window)
 266 {
 267         RaktWindowPriv *priv;
 268
 269         priv = GET_PRIV (window);
 270
 271         gtk_box_pack_start (GTK_BOX (priv->content_vbox), widget, FALSE, FALSE, 0);
 272 }
 273
 274 static void
 275 on_action_quit (GtkAction *action, RaktWindow *window)
 276 {
 277         gtk_main_quit ();
 278 }
 279
 280 static void
 281 on_action_open (GtkAction *action, RaktWindow *window)
 282 {
 283         GtkWidget *dialog;
 284         GtkFileFilter *filter;
 285         gint n;
 286
 287         dialog = gtk_file_chooser_dialog_new ("Open PDF",
 288                                               GTK_WINDOW (window),
 289                                               GTK_FILE_CHOOSER_ACTION_OPEN,
 290                                               GTK_STOCK_OPEN,
 291                                               GTK_RESPONSE_ACCEPT,
 292                                               GTK_STOCK_CANCEL,
 293                                               GTK_RESPONSE_CANCEL, NULL);
 294
 295         filter = gtk_file_filter_new ();
 296         gtk_file_filter_set_name (filter, "PDF files");
 297         gtk_file_filter_add_pattern (filter, "*.pdf");
 298
 299         gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 300
 301         /* now run the dialog */
 302         n = gtk_dialog_run (GTK_DIALOG (dialog));
 303
 304         if (n == GTK_RESPONSE_ACCEPT) {
 305                 gchar *uri;
 306
 307                 uri = gtk_file_chooser_get_uri (GTK_FILE_CHOOSER (dialog));
 308                 open_document (window, uri);
 309                 g_free (uri);
 310         }
 311
 312         gtk_widget_destroy (dialog);
 313 }
 314
 315 static void
 316 on_action_go_next (GtkAction *action, RaktWindow *window)
 317 {
 318         RaktWindowPriv *priv;
 319
 320         priv = GET_PRIV (window);
 321
 322         priv->page_no++;
 323         render_page (window);
 324 }
 325
 326 static void
 327 on_action_go_previous (GtkAction *action, RaktWindow *window)
 328 {
 329         RaktWindowPriv *priv;
 330
 331         priv = GET_PRIV (window);
 332
 333         priv->page_no--;
 334         render_page (window);
 335 }
 336
 337 static void
 338 on_action_about (GtkAction *action, RaktWindow *window)
 339 {
 340         const gchar *authors[] = {
 341                 "Tilman Sauerbeck",
 342                 NULL
 343         };
 344
 345         gtk_show_about_dialog (GTK_WINDOW (window),
 346                                "name", PACKAGE_NAME,
 347                                "copyright", "Copyright (c) 2007 Tilman Sauerbeck",
 348                                "version", VERSION,
 349                                "authors", authors,
 350                                NULL);
 351 }
 352
 353 GtkWidget *
 354 rakt_window_new (void)
 355 {
 356         return g_object_new (RAKT_TYPE_WINDOW, NULL);
 357 }