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 RaktWindowPriv RaktWindowPriv;
  34
  35 struct RaktWindowPriv {
  36         GtkWidget *content_vbox;
  37
  38         /* Menu & toolbar */
  39         GtkUIManager *ui_manager;
  40         GtkAction *action_prev;
  41         GtkAction *action_next;
  42
  43         GtkWidget *image;
  44         GdkPixbuf *pixbuf;
  45         PopplerDocument *document;
  46         gint page_no;
  47 };
  48
  49 static void window_finalize (GObject *object);
  50
  51 static void on_add_widget (GtkUIManager *merge, GtkWidget *widget, RaktWindow *window);
  52
  53 static void on_action_quit (GtkAction *action, RaktWindow *window);
  54 static void on_action_open (GtkAction *action, RaktWindow *window);
  55 static void on_action_go_next (GtkAction *action, RaktWindow *window);
  56 static void on_action_go_previous (GtkAction *action, RaktWindow *window);
  57 static void on_action_about (GtkAction *action, RaktWindow *window);
  58
  59 static const GtkActionEntry action_entries[] = {
  60         {
  61                 "FileMenu", NULL, "_File", NULL, NULL, NULL
  62         },
  63         {
  64                 "HelpMenu", NULL, "_Help", NULL, NULL, NULL
  65         },
  66         {
  67                 "Open", GTK_STOCK_OPEN,
  68                 "_Open", "<control>O", "Open a PDF file",
  69                 G_CALLBACK (on_action_open)
  70         },
  71         {
  72                 "Next", GTK_STOCK_GO_FORWARD, "_Next",
  73                 "<control>n", "Next",
  74                 G_CALLBACK (on_action_go_next)
  75         },
  76         {
  77                 "Previous", GTK_STOCK_GO_BACK, "_Previous",
  78                 "<control>p", "Previous",
  79                 G_CALLBACK (on_action_go_previous)
  80         },
  81         {
  82                 "Quit", GTK_STOCK_QUIT,
  83                 "_Quit", "<control>Q", "Quit the application",
  84                 G_CALLBACK (on_action_quit)
  85         },
  86         {
  87                 "About", GTK_STOCK_ABOUT,
  88                 "_About", NULL, "About this application",
  89                 G_CALLBACK (on_action_about)
  90         }
  91 };
  92
  93 static const gchar *ui_layout =
  94         "<ui>"
  95         "       <menubar name='MenuBar'>"
  96         "               <menu action='FileMenu'>"
  97         "                       <menuitem action='Open'/>"
  98         "                       <separator action='Sep1'/>"
  99         "                       <menuitem action='Quit'/>"
 100         "               </menu>"
 101         "               <menu action='HelpMenu'>"
 102         "                       <menuitem action='About'/>"
 103         "               </menu>"
 104         "       </menubar>"
 105         "       <toolbar name='ToolBar'>"
 106         "               <toolitem action='Open'/>"
 107         "               <toolitem action='Previous'/>"
 108         "               <toolitem action='Next'/>"
 109         "       </toolbar>"
 110         "</ui>";
 111
 112 G_DEFINE_TYPE (RaktWindow, rakt_window, GTK_TYPE_WINDOW)
 113
 114 #define GET_PRIV(obj) \
 115         (G_TYPE_INSTANCE_GET_PRIVATE ((obj), RAKT_TYPE_WINDOW, RaktWindowPriv))
 116
 117 static void
 118 rakt_window_class_init (RaktWindowClass *class)
 119 {
 120         GObjectClass *object_class = G_OBJECT_CLASS (class);
 121
 122         object_class->finalize = window_finalize;
 123
 124         g_type_class_add_private (object_class, sizeof (RaktWindowPriv));
 125 }
 126
 127 static void
 128 render_page (RaktWindow *window)
 129 {
 130         RaktWindowPriv *priv;
 131         PopplerPage *page;
 132         double tmpw, tmph;
 133         int width, height, n_pages;
 134
 135         priv = GET_PRIV (window);
 136
 137         n_pages = poppler_document_get_n_pages (priv->document);
 138         gtk_action_set_sensitive (priv->action_prev, priv->page_no > 0);
 139         gtk_action_set_sensitive (priv->action_next, priv->page_no < n_pages);
 140
 141         page = poppler_document_get_page (priv->document, priv->page_no);
 142
 143         poppler_page_get_size (page, &tmpw, &tmph);
 144
 145         width = (int) tmpw;
 146         height = (int) tmph;
 147
 148         priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
 149                                        width, height);
 150
 151         poppler_page_render_to_pixbuf (page, 0, 0, width, height, 1.0, 0,
 152                                        priv->pixbuf);
 153         gtk_image_set_from_pixbuf (GTK_IMAGE (priv->image), priv->pixbuf);
 154 }
 155
 156 static void
 157 open_document (RaktWindow *window, gchar *file)
 158 {
 159         RaktWindowPriv *priv;
 160         GError *error = NULL;
 161         gchar real[PATH_MAX], buf[16 + PATH_MAX];
 162
 163         priv = GET_PRIV (window);
 164
 165         realpath (file, real);
 166
 167         g_strlcpy (buf, "file://", sizeof (buf));
 168         g_strlcat (buf, real, sizeof (buf));
 169
 170         priv->document = poppler_document_new_from_file (buf, NULL, &error);
 171
 172         priv->page_no = 0;
 173         render_page (window);
 174 }
 175
 176 static void
 177 window_create_menu (RaktWindow *window)
 178 {
 179         RaktWindowPriv *priv;
 180         GtkActionGroup *action_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         g_object_unref (action_group);
 197
 198         gtk_ui_manager_add_ui_from_string (priv->ui_manager, ui_layout, -1, &error);
 199
 200         if (error)
 201                 g_error ("Couldn't create UI: %s\n", error->message);
 202
 203         gtk_ui_manager_ensure_update (priv->ui_manager);
 204
 205         priv->action_prev = gtk_ui_manager_get_action (priv->ui_manager,
 206                                                        "ui/ToolBar/Previous");
 207         priv->action_next = gtk_ui_manager_get_action (priv->ui_manager,
 208                                                        "ui/ToolBar/Next");
 209
 210         gtk_action_set_sensitive (priv->action_prev, false);
 211         gtk_action_set_sensitive (priv->action_next, false);
 212 }
 213
 214 static gboolean
 215 on_delete_event (GtkWidget *widget, GdkEvent *event, gpointer user_data)
 216 {
 217         gtk_main_quit ();
 218
 219         return FALSE;
 220 }
 221
 222 static void
 223 rakt_window_init (RaktWindow *window)
 224 {
 225         RaktWindowPriv *priv;
 226
 227         priv = GET_PRIV (window);
 228
 229         gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
 230         gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);
 231
 232         priv->content_vbox = gtk_vbox_new (FALSE, 0);
 233         gtk_widget_show (priv->content_vbox);
 234         gtk_container_add (GTK_CONTAINER (window), priv->content_vbox);
 235
 236         window_create_menu (window);
 237
 238         priv->image = gtk_image_new ();
 239
 240         gtk_widget_show (priv->image);
 241         gtk_box_pack_start (GTK_BOX (priv->content_vbox), priv->image,
 242                             TRUE, TRUE, 0);
 243
 244         g_signal_connect (GTK_WINDOW (window), "delete-event",
 245                           G_CALLBACK (on_delete_event), NULL);
 246 }
 247
 248 static void
 249 window_finalize (GObject *object)
 250 {
 251         RaktWindowPriv *priv;
 252
 253         priv = GET_PRIV (object);
 254
 255         g_object_unref (priv->ui_manager);
 256
 257         G_OBJECT_CLASS (rakt_window_parent_class)->finalize (object);
 258 }
 259
 260 static void
 261 on_add_widget (GtkUIManager *merge, GtkWidget *widget, RaktWindow *window)
 262 {
 263         RaktWindowPriv *priv;
 264
 265         priv = GET_PRIV (window);
 266
 267         gtk_box_pack_start (GTK_BOX (priv->content_vbox), widget, FALSE, FALSE, 0);
 268 }
 269
 270 static void
 271 on_action_quit (GtkAction *action, RaktWindow *window)
 272 {
 273         gtk_main_quit ();
 274 }
 275
 276 static void
 277 on_action_open (GtkAction *action, RaktWindow *window)
 278 {
 279         GtkWidget *dialog;
 280         GtkFileFilter *filter;
 281         gint n;
 282
 283         dialog = gtk_file_chooser_dialog_new ("Open PDF",
 284                                               GTK_WINDOW (window),
 285                                               GTK_FILE_CHOOSER_ACTION_OPEN,
 286                                               GTK_STOCK_OPEN,
 287                                               GTK_RESPONSE_ACCEPT,
 288                                               GTK_STOCK_CANCEL,
 289                                               GTK_RESPONSE_CANCEL, NULL);
 290
 291         filter = gtk_file_filter_new ();
 292         gtk_file_filter_set_name (filter, "PDF files");
 293         gtk_file_filter_add_pattern (filter, "*.pdf");
 294
 295         gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (dialog), filter);
 296
 297         /* now run the dialog */
 298         n = gtk_dialog_run (GTK_DIALOG (dialog));
 299
 300         if (n == GTK_RESPONSE_ACCEPT) {
 301                 gchar *file;
 302
 303                 file = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
 304                 open_document (window, file);
 305         }
 306
 307         gtk_widget_destroy (dialog);
 308 }
 309
 310 static void
 311 on_action_go_next (GtkAction *action, RaktWindow *window)
 312 {
 313         RaktWindowPriv *priv;
 314
 315         priv = GET_PRIV (window);
 316
 317         priv->page_no++;
 318         render_page (window);
 319 }
 320
 321 static void
 322 on_action_go_previous (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_about (GtkAction *action, RaktWindow *window)
 334 {
 335         const gchar *authors[] = {
 336                 "Tilman Sauerbeck",
 337                 NULL
 338         };
 339
 340         gtk_show_about_dialog (GTK_WINDOW (window),
 341                                "name", PACKAGE_NAME,
 342                                "copyright", "Copyright (c) 2007 Tilman Sauerbeck",
 343                                "version", VERSION,
 344                                "authors", authors,
 345                                NULL);
 346 }
 347
 348 GtkWidget *
 349 rakt_window_new (void)
 350 {
 351         return g_object_new (RAKT_TYPE_WINDOW, NULL);
 352 }