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 *file)
 163 {
 164         RaktWindowPriv *priv;
 165         GError *error = NULL;
 166         gchar real[PATH_MAX], buf[16 + PATH_MAX];
 167
 168         priv = GET_PRIV (window);
 169
 170         realpath (file, real);
 171
 172         g_strlcpy (buf, "file://", sizeof (buf));
 173         g_strlcat (buf, real, sizeof (buf));
 174
 175         priv->document = poppler_document_new_from_file (buf, NULL, &error);
 176
 177         priv->page_no = 0;
 178         render_page (window);
 179 }
 180
 181 static void
 182 window_create_menu (RaktWindow *window)
 183 {
 184         RaktWindowPriv *priv;
 185         GtkActionGroup *action_group;
 186         GtkAccelGroup *accel_group;
 187         GError *error = NULL;
 188
 189         priv = GET_PRIV (window);
 190
 191         priv->ui_manager = gtk_ui_manager_new ();
 192
 193         g_signal_connect (priv->ui_manager,
 194                           "add_widget",
 195                           G_CALLBACK (on_add_widget),
 196                           window);
 197
 198         action_group = gtk_action_group_new ("Actions");
 199         gtk_action_group_add_actions (action_group, action_entries,
 200                                       G_N_ELEMENTS (action_entries), window);
 201         gtk_ui_manager_insert_action_group (priv->ui_manager, action_group, 0);
 202
 203         accel_group = gtk_ui_manager_get_accel_group (priv->ui_manager);
 204         gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
 205
 206         g_object_unref (action_group);
 207
 208         gtk_ui_manager_add_ui_from_string (priv->ui_manager, ui_layout, -1, &error);
 209
 210         if (error)
 211                 g_error ("Couldn't create UI: %s\n", error->message);
 212
 213         gtk_ui_manager_ensure_update (priv->ui_manager);
 214
 215         priv->action_prev = gtk_ui_manager_get_action (priv->ui_manager,
 216                                                        "ui/ToolBar/Previous");
 217         priv->action_next = gtk_ui_manager_get_action (priv->ui_manager,
 218                                                        "ui/ToolBar/Next");
 219
 220         gtk_action_set_sensitive (priv->action_prev, false);
 221         gtk_action_set_sensitive (priv->action_next, false);
 222 }
 223
 224 static gboolean
 225 on_delete_event (GtkWidget *widget, GdkEvent *event, gpointer user_data)
 226 {
 227         gtk_main_quit ();
 228
 229         return FALSE;
 230 }
 231
 232 static void
 233 rakt_window_init (RaktWindow *window)
 234 {
 235         RaktWindowPriv *priv;
 236
 237         priv = GET_PRIV (window);
 238
 239         gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
 240         gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);
 241
 242         priv->content_vbox = gtk_vbox_new (FALSE, 0);
 243         gtk_widget_show (priv->content_vbox);
 244         gtk_container_add (GTK_CONTAINER (window), priv->content_vbox);
 245
 246         window_create_menu (window);
 247
 248         priv->image = gtk_image_new ();
 249
 250         gtk_widget_show (priv->image);
 251         gtk_box_pack_start (GTK_BOX (priv->content_vbox), priv->image,
 252                             TRUE, TRUE, 0);
 253
 254         g_signal_connect (GTK_WINDOW (window), "delete-event",
 255                           G_CALLBACK (on_delete_event), NULL);
 256 }
 257
 258 static void
 259 window_finalize (GObject *object)
 260 {
 261         RaktWindowPriv *priv;
 262
 263         priv = GET_PRIV (object);
 264
 265         g_object_unref (priv->ui_manager);
 266
 267         G_OBJECT_CLASS (rakt_window_parent_class)->finalize (object);
 268 }
 269
 270 static void
 271 on_add_widget (GtkUIManager *merge, GtkWidget *widget, RaktWindow *window)
 272 {
 273         RaktWindowPriv *priv;
 274
 275         priv = GET_PRIV (window);
 276
 277         gtk_box_pack_start (GTK_BOX (priv->content_vbox), widget, FALSE, FALSE, 0);
 278 }
 279
 280 static void
 281 on_action_quit (GtkAction *action, RaktWindow *window)
 282 {
 283         gtk_main_quit ();
 284 }
 285
 286 static void
 287 on_action_open (GtkAction *action, RaktWindow *window)
 288 {
 289         GtkWidget *dialog;
 290         GtkFileFilter *filter;
 291         gint n;
 292
 293         dialog = gtk_file_chooser_dialog_new ("Open PDF",
 294                                               GTK_WINDOW (window),
 295                                               GTK_FILE_CHOOSER_ACTION_OPEN,
 296                                               GTK_STOCK_OPEN,
 297                                               GTK_RESPONSE_ACCEPT,
 298                                               GTK_STOCK_CANCEL,
 299                                               GTK_RESPONSE_CANCEL, NULL);
 300
 301         filter = gtk_file_filter_new ();
 302         gtk_file_filter_set_name (filter, "PDF files");
 303         gtk_file_filter_add_pattern (filter, "*.pdf");
 304
 305         gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 306
 307         /* now run the dialog */
 308         n = gtk_dialog_run (GTK_DIALOG (dialog));
 309
 310         if (n == GTK_RESPONSE_ACCEPT) {
 311                 gchar *file;
 312
 313                 file = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
 314                 open_document (window, file);
 315                 g_free (file);
 316         }
 317
 318         gtk_widget_destroy (dialog);
 319 }
 320
 321 static void
 322 on_action_go_next (GtkAction *action, RaktWindow *window)
 323 {
 324         RaktWindowPriv *priv;
 325
 326         priv = GET_PRIV (window);
 327
 328         priv->page_no++;
 329         render_page (window);
 330 }
 331
 332 static void
 333 on_action_go_previous (GtkAction *action, RaktWindow *window)
 334 {
 335         RaktWindowPriv *priv;
 336
 337         priv = GET_PRIV (window);
 338
 339         priv->page_no--;
 340         render_page (window);
 341 }
 342
 343 static void
 344 on_action_about (GtkAction *action, RaktWindow *window)
 345 {
 346         const gchar *authors[] = {
 347                 "Tilman Sauerbeck",
 348                 NULL
 349         };
 350
 351         gtk_show_about_dialog (GTK_WINDOW (window),
 352                                "name", PACKAGE_NAME,
 353                                "copyright", "Copyright (c) 2007 Tilman Sauerbeck",
 354                                "version", VERSION,
 355                                "authors", authors,
 356                                NULL);
 357 }
 358
 359 GtkWidget *
 360 rakt_window_new (void)
 361 {
 362         return g_object_new (RAKT_TYPE_WINDOW, NULL);
 363 }