git.sur5r.net Git - glabels/blob - glabels2/src/object-editor-image-page.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
   2
   3 /*
   4  *  (GLABELS) Label and Business Card Creation program for GNOME
   5  *
   6  *  object-editor.c:  object properties editor module
   7  *
   8  *  Copyright (C) 2003  Jim Evins <evins@snaught.com>.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  */
  24 #include <config.h>
  25
  26 #include "object-editor.h"
  27
  28 #include <glib/gi18n.h>
  29 #include <gtk/gtkimage.h>
  30 #include <gtk/gtkfilechooserbutton.h>
  31 #include <gtk/gtkcombobox.h>
  32 #include <gtk/gtktogglebutton.h>
  33 #include <math.h>
  34
  35 #include "prefs.h"
  36 #include "util.h"
  37
  38 #include "object-editor-private.h"
  39
  40 #include "debug.h"
  41
  42 /*===========================================*/
  43 /* Private macros                            */
  44 /*===========================================*/
  45
  46 /*===========================================*/
  47 /* Private data types                        */
  48 /*===========================================*/
  49
  50 /*===========================================*/
  51 /* Private globals                           */
  52 /*===========================================*/
  53
  54 /*===========================================*/
  55 /* Local function prototypes                 */
  56 /*===========================================*/
  57
  58 static void img_radio_toggled_cb                (glObjectEditor        *editor);
  59
  60 static void update_preview_cb                   (GtkFileChooser *file_chooser,
  61                                                  gpointer        data);
  62 static void add_image_filters_to_chooser        (GtkFileChooser *file_chooser);
  63
  64 static void img_selection_changed_cb (glObjectEditor *editor);
  65
  66 \f
  67 /*--------------------------------------------------------------------------*/
  68 /* PRIVATE.  Prepare image page.                                             */
  69 /*--------------------------------------------------------------------------*/
  70 void
  71 gl_object_editor_prepare_image_page (glObjectEditor *editor)
  72 {
  73         GtkWidget     *preview;
  74
  75
  76         gl_debug (DEBUG_EDITOR, "START");
  77
  78         /* Extract widgets from XML tree. */
  79         editor->priv->img_page_vbox    = glade_xml_get_widget (editor->priv->gui,
  80                                                                "img_page_vbox");
  81         editor->priv->img_file_radio   = glade_xml_get_widget (editor->priv->gui,
  82                                                                "img_file_radio");
  83         editor->priv->img_key_radio    = glade_xml_get_widget (editor->priv->gui,
  84                                                                "img_key_radio");
  85         editor->priv->img_file_button  = glade_xml_get_widget (editor->priv->gui,
  86                                                                "img_file_button");
  87         editor->priv->img_key_combo    = glade_xml_get_widget (editor->priv->gui,
  88                                                                "img_key_combo");
  89
  90         gl_util_combo_box_add_text_model ( GTK_COMBO_BOX(editor->priv->img_key_combo));
  91
  92         /* Modify file button properties. */
  93         add_image_filters_to_chooser (GTK_FILE_CHOOSER (editor->priv->img_file_button));
  94         preview = gtk_image_new ();
  95         gtk_file_chooser_set_preview_widget (GTK_FILE_CHOOSER (editor->priv->img_file_button), preview);
  96         g_signal_connect (G_OBJECT (editor->priv->img_file_button),
  97                           "update-preview",
  98                           G_CALLBACK (update_preview_cb), preview);
  99
 100         /* Un-hide */
 101         gtk_widget_show_all (editor->priv->img_page_vbox);
 102
 103         /* Connect signals */
 104         g_signal_connect_swapped (G_OBJECT (editor->priv->img_file_button),
 105                                   "selection-changed",
 106                                   G_CALLBACK (img_selection_changed_cb),
 107                                   G_OBJECT (editor));
 108         g_signal_connect_swapped (G_OBJECT (editor->priv->img_key_combo),
 109                                   "changed",
 110                                   G_CALLBACK (gl_object_editor_changed_cb),
 111                                   G_OBJECT (editor));
 112         g_signal_connect_swapped (G_OBJECT (editor->priv->img_file_radio),
 113                                   "toggled",
 114                                   G_CALLBACK (img_radio_toggled_cb),
 115                                   G_OBJECT (editor));
 116         g_signal_connect_swapped (G_OBJECT (editor->priv->img_key_radio),
 117                                   "toggled",
 118                                   G_CALLBACK (img_radio_toggled_cb),
 119                                   G_OBJECT (editor));
 120
 121         gl_debug (DEBUG_EDITOR, "END");
 122 }
 123
 124 /*--------------------------------------------------------------------------*/
 125 /* PRIVATE.  image radio callback.                                          */
 126 /*--------------------------------------------------------------------------*/
 127 static void
 128 img_radio_toggled_cb (glObjectEditor *editor)
 129 {
 130         gl_debug (DEBUG_WDGT, "START");
 131
 132         if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (editor->priv->img_file_radio))) {
 133                 gtk_widget_set_sensitive (editor->priv->img_file_button, TRUE);
 134                 gtk_widget_set_sensitive (editor->priv->img_key_combo, FALSE);
 135         } else {
 136                 gtk_widget_set_sensitive (editor->priv->img_file_button, FALSE);
 137                 gtk_widget_set_sensitive (editor->priv->img_key_combo, TRUE);
 138         }
 139
 140         /* Emit our "changed" signal */
 141         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 142
 143         gl_debug (DEBUG_WDGT, "END");
 144 }
 145
 146 /*****************************************************************************/
 147 /* Set image.                                                                */
 148 /*****************************************************************************/
 149 void
 150 gl_object_editor_set_image (glObjectEditor      *editor,
 151                             gboolean             merge_flag,
 152                             glTextNode          *text_node)
 153 {
 154         gl_debug (DEBUG_EDITOR, "START");
 155
 156         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->img_file_button),
 157                                          G_CALLBACK (gl_object_editor_changed_cb),
 158                                          editor);
 159         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->img_key_combo),
 160                                          G_CALLBACK (gl_object_editor_changed_cb),
 161                                          editor);
 162         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->img_file_radio),
 163                                          G_CALLBACK (img_radio_toggled_cb),
 164                                          editor);
 165         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->img_key_radio),
 166                                          G_CALLBACK (img_radio_toggled_cb),
 167                                          editor);
 168
 169         gtk_widget_set_sensitive (editor->priv->img_key_radio, merge_flag);
 170
 171         if (!text_node->field_flag) {
 172
 173                 gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON
 174                                               (editor->priv->img_file_radio), TRUE);
 175                 gtk_widget_set_sensitive (editor->priv->img_file_button, TRUE);
 176                 gtk_widget_set_sensitive (editor->priv->img_key_combo, FALSE);
 177
 178                 if (text_node->data != NULL ) {
 179                         gtk_file_chooser_set_filename (GTK_FILE_CHOOSER(editor->priv->img_file_button),
 180                                                        text_node->data);
 181                 } else {
 182                         gtk_file_chooser_unselect_all (GTK_FILE_CHOOSER(editor->priv->img_file_button));
 183                 }
 184         } else {
 185
 186                 gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON
 187                                               (editor->priv->img_key_radio), TRUE);
 188
 189                 gtk_widget_set_sensitive (editor->priv->img_file_button, FALSE);
 190                 gtk_widget_set_sensitive (editor->priv->img_key_combo, TRUE);
 191
 192                 gl_util_combo_box_set_active_text (GTK_COMBO_BOX (editor->priv->img_key_combo),
 193                                                    text_node->data);
 194         }
 195
 196         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->img_file_button),
 197                                            G_CALLBACK (gl_object_editor_changed_cb),
 198                                            editor);
 199         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->img_key_combo),
 200                                            G_CALLBACK (gl_object_editor_changed_cb),
 201                                            editor);
 202         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->img_file_radio),
 203                                            G_CALLBACK (img_radio_toggled_cb),
 204                                            editor);
 205         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->img_key_radio),
 206                                            G_CALLBACK (img_radio_toggled_cb),
 207                                            editor);
 208
 209         gl_debug (DEBUG_EDITOR, "END");
 210 }
 211
 212 /*****************************************************************************/
 213 /* Query image.                                                              */
 214 /*****************************************************************************/
 215 glTextNode *
 216 gl_object_editor_get_image (glObjectEditor      *editor)
 217 {
 218         glTextNode *text_node;
 219
 220         gl_debug (DEBUG_EDITOR, "START");
 221
 222         text_node = g_new0(glTextNode,1);
 223
 224         if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (editor->priv->img_file_radio))) {
 225                 text_node->field_flag = FALSE;
 226                 text_node->data =
 227                         gtk_file_chooser_get_filename (GTK_FILE_CHOOSER(editor->priv->img_file_button));
 228         } else {
 229                 text_node->field_flag = TRUE;
 230                 text_node->data =
 231                         gtk_combo_box_get_active_text (GTK_COMBO_BOX (editor->priv->img_key_combo));
 232         }
 233
 234         gl_debug (DEBUG_EDITOR, "text_node: field_flag=%d, data=%s",
 235                   text_node->field_flag, text_node->data);
 236
 237         gl_debug (DEBUG_EDITOR, "END");
 238
 239         return text_node;
 240 }
 241
 242 /*--------------------------------------------------------------------------*/
 243 /* PRIVATE.  Update preview image.                                          */
 244 /*--------------------------------------------------------------------------*/
 245 static void
 246 update_preview_cb (GtkFileChooser *file_chooser, gpointer data)
 247 {
 248   GtkWidget *preview;
 249   char *filename;
 250   GdkPixbuf *pixbuf;
 251   gboolean have_preview;
 252
 253   preview = GTK_WIDGET (data);
 254   filename = gtk_file_chooser_get_preview_filename (file_chooser);
 255
 256   if (filename) {
 257           pixbuf = gdk_pixbuf_new_from_file_at_size (filename, 128, 128, NULL);
 258           have_preview = (pixbuf != NULL);
 259           g_free (filename);
 260
 261           gtk_image_set_from_pixbuf (GTK_IMAGE (preview), pixbuf);
 262           if (pixbuf)
 263                   gdk_pixbuf_unref (pixbuf);
 264
 265           gtk_file_chooser_set_preview_widget_active (file_chooser,
 266                                                       have_preview);
 267   } else {
 268           gtk_file_chooser_set_preview_widget_active (file_chooser, FALSE);
 269   }
 270 }
 271
 272 /*--------------------------------------------------------------------------*/
 273 /* PRIVATE.  Add filters to file chooser.                                   */
 274 /*           Based on eog's eog_file_selection_add_filter().                */
 275 /*--------------------------------------------------------------------------*/
 276 static void
 277 add_image_filters_to_chooser (GtkFileChooser *chooser)
 278 {
 279         GtkFileFilter *all_file_filter;
 280         GtkFileFilter *all_img_filter;
 281         GSList        *formats;
 282         GSList        *it;
 283         GtkFileFilter *filter;
 284         GSList        *filters = NULL;
 285         gchar        **mime_types, **pattern, *tmp;
 286         int            i;
 287
 288         /* All Files Filter */
 289         all_file_filter = gtk_file_filter_new ();
 290         gtk_file_filter_set_name (all_file_filter, _("All Files"));
 291         gtk_file_filter_add_pattern (all_file_filter, "*");
 292
 293         /* All Image Filter */
 294         all_img_filter = gtk_file_filter_new ();
 295         gtk_file_filter_set_name (all_img_filter, _("All Images"));
 296
 297         /* Individual image filters */
 298         formats = gdk_pixbuf_get_formats ();
 299         for (it = formats; it != NULL; it = it->next) {
 300                 gchar *filter_name;
 301                 GdkPixbufFormat *format;
 302                 filter = gtk_file_filter_new ();
 303                 gchar *description, *name;
 304
 305                 format = (GdkPixbufFormat*) it->data;
 306
 307                 /* Filter name: First description then file extension, eg. "The PNG-Format (*.png)".*/
 308                 description = gdk_pixbuf_format_get_description (format);
 309                 name = gdk_pixbuf_format_get_name (format);
 310                 filter_name = g_strdup_printf (_("%s (*.%s)"), description, name);
 311                 g_free (description);
 312                 g_free (name);
 313                 gtk_file_filter_set_name (filter, filter_name);
 314                 g_free (filter_name);
 315
 316                 mime_types = gdk_pixbuf_format_get_mime_types ((GdkPixbufFormat *) it->data);
 317                 for (i = 0; mime_types[i] != NULL; i++) {
 318                         gtk_file_filter_add_mime_type (filter, mime_types[i]);
 319                         gtk_file_filter_add_mime_type (all_img_filter, mime_types[i]);
 320                 }
 321                 g_strfreev (mime_types);
 322
 323                 pattern = gdk_pixbuf_format_get_extensions ((GdkPixbufFormat *) it->data);
 324                 for (i = 0; pattern[i] != NULL; i++) {
 325                         tmp = g_strconcat ("*.", pattern[i], NULL);
 326                         gtk_file_filter_add_pattern (filter, tmp);
 327                         gtk_file_filter_add_pattern (all_img_filter, tmp);
 328                         g_free (tmp);
 329                 }
 330                 g_strfreev (pattern);
 331
 332                 filters = g_slist_prepend (filters, filter);
 333         }
 334         g_slist_free (formats);
 335
 336         /* Add filter to filechooser */
 337         gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), all_file_filter);
 338         gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), all_img_filter);
 339         gtk_file_chooser_set_filter (GTK_FILE_CHOOSER (chooser), all_img_filter);
 340
 341         for (it = filters; it != NULL; it = it->next) {
 342                 gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser),
 343                                              GTK_FILE_FILTER (it->data));
 344         }
 345         g_slist_free (filters);
 346 }
 347
 348 /*--------------------------------------------------------------------------*/
 349 /* PRIVATE. Selection changed callback.                                     */
 350 /*--------------------------------------------------------------------------*/
 351 static void
 352 img_selection_changed_cb (glObjectEditor *editor)
 353 {
 354         gchar *filename;
 355
 356         gl_debug (DEBUG_EDITOR, "START");
 357
 358         filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER(editor->priv->img_file_button));
 359         if (filename != NULL)
 360         {
 361                 /* Emit our "changed" signal */
 362                 g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 363         }
 364         g_free (filename);
 365
 366         gl_debug (DEBUG_EDITOR, "END");
 367 }
 368