git.sur5r.net Git - glabels/blob - src/view-image.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  *  view_image.c:  GLabels label image object view
   7  *
   8  *  Copyright (C) 2001-2007  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 "view-image.h"
  27
  28 #include <glib/gi18n.h>
  29 #include <glib/gmem.h>
  30
  31 #include "color.h"
  32 #include "object-editor.h"
  33 #include "stock.h"
  34
  35 #include "pixmaps/cursor_image.xbm"
  36 #include "pixmaps/cursor_image_mask.xbm"
  37
  38 #include "debug.h"
  39
  40 /*========================================================*/
  41 /* Private macros and constants.                          */
  42 /*========================================================*/
  43
  44
  45 /*========================================================*/
  46 /* Private types.                                         */
  47 /*========================================================*/
  48
  49 struct _glViewImagePrivate {
  50         int place_holder; /* Place holder for future private data. */
  51 };
  52
  53 /*========================================================*/
  54 /* Private globals.                                       */
  55 /*========================================================*/
  56
  57
  58 /*========================================================*/
  59 /* Private function prototypes.                           */
  60 /*========================================================*/
  61
  62 static void       gl_view_image_finalize            (GObject          *object);
  63
  64 static GtkWidget *construct_properties_editor       (glViewObject     *view_object);
  65
  66 static void       update_object_from_editor_cb      (glObjectEditor   *editor,
  67                                                      glLabelObject    *object);
  68
  69 static void       update_editor_from_object_cb      (glLabelObject    *object,
  70                                                      glObjectEditor   *editor);
  71
  72 static void       update_editor_from_move_cb        (glLabelObject    *object,
  73                                                      gdouble           dx,
  74                                                      gdouble           dy,
  75                                                      glObjectEditor   *editor);
  76
  77 static gboolean   object_at                         (glViewObject     *view_object,
  78                                                      cairo_t          *cr,
  79                                                      gdouble           x,
  80                                                      gdouble           y);
  81
  82
  83 \f
  84 /*****************************************************************************/
  85 /* Boilerplate object stuff.                                                 */
  86 /*****************************************************************************/
  87 G_DEFINE_TYPE (glViewImage, gl_view_image, GL_TYPE_VIEW_OBJECT);
  88
  89
  90 static void
  91 gl_view_image_class_init (glViewImageClass *class)
  92 {
  93         GObjectClass      *object_class      = G_OBJECT_CLASS (class);
  94         glViewObjectClass *view_object_class = GL_VIEW_OBJECT_CLASS (class);
  95
  96         gl_debug (DEBUG_VIEW, "START");
  97
  98         gl_view_image_parent_class = g_type_class_peek_parent (class);
  99
 100         object_class->finalize = gl_view_image_finalize;
 101
 102         view_object_class->construct_editor = construct_properties_editor;
 103         view_object_class->object_at        = object_at;
 104
 105         gl_debug (DEBUG_VIEW, "END");
 106 }
 107
 108 static void
 109 gl_view_image_init (glViewImage *view_image)
 110 {
 111         gl_debug (DEBUG_VIEW, "START");
 112
 113         view_image->priv = g_new0 (glViewImagePrivate, 1);
 114
 115         gl_debug (DEBUG_VIEW, "END");
 116 }
 117
 118 static void
 119 gl_view_image_finalize (GObject *object)
 120 {
 121         glViewImage *view_image = GL_VIEW_IMAGE (object);
 122
 123         gl_debug (DEBUG_VIEW, "START");
 124
 125         g_return_if_fail (object && GL_IS_VIEW_IMAGE (object));
 126
 127         g_free (view_image->priv);
 128
 129         G_OBJECT_CLASS (gl_view_image_parent_class)->finalize (object);
 130
 131         gl_debug (DEBUG_VIEW, "END");
 132 }
 133
 134 /*****************************************************************************/
 135 /* NEW image object view.                                                    */
 136 /*****************************************************************************/
 137 glViewObject *
 138 gl_view_image_new (glLabelImage *object,
 139                    glView       *view)
 140 {
 141         glViewImage         *view_image;
 142
 143         gl_debug (DEBUG_VIEW, "START");
 144
 145         g_return_val_if_fail (object && GL_IS_LABEL_IMAGE (object), NULL);
 146         g_return_val_if_fail (view && GL_IS_VIEW (view), NULL);
 147
 148         view_image = g_object_new (gl_view_image_get_type(), NULL);
 149
 150         gl_view_object_set_object (GL_VIEW_OBJECT(view_image),
 151                                    GL_LABEL_OBJECT(object),
 152                                    GL_VIEW_OBJECT_HANDLES_BOX);
 153         gl_view_object_set_view (GL_VIEW_OBJECT(view_image), view);
 154
 155         gl_debug (DEBUG_VIEW, "END");
 156
 157         return GL_VIEW_OBJECT (view_image);
 158 }
 159
 160 /*****************************************************************************/
 161 /* Create a properties dialog for a image object.                            */
 162 /*****************************************************************************/
 163 static GtkWidget *
 164 construct_properties_editor (glViewObject *view_object)
 165 {
 166         GtkWidget          *editor;
 167         glViewImage        *view_image = (glViewImage *)view_object;
 168         glLabelObject      *object;
 169
 170         gl_debug (DEBUG_VIEW, "START");
 171
 172         object = gl_view_object_get_object (GL_VIEW_OBJECT(view_image));
 173
 174         /* Build editor. */
 175         editor = gl_object_editor_new (GL_STOCK_IMAGE, _("Image object properties"),
 176                                        object->parent,
 177                                        GL_OBJECT_EDITOR_POSITION_PAGE,
 178                                        GL_OBJECT_EDITOR_SIZE_IMAGE_PAGE,
 179                                        GL_OBJECT_EDITOR_IMAGE_PAGE,
 180                                        0);
 181
 182         /* Update */
 183         update_editor_from_object_cb (object, GL_OBJECT_EDITOR(editor));
 184         update_editor_from_move_cb (object, 0, 0, GL_OBJECT_EDITOR(editor));
 185
 186         /* Connect signals. */
 187         g_signal_connect (G_OBJECT (editor), "changed",
 188                           G_CALLBACK(update_object_from_editor_cb), object);
 189         g_signal_connect (G_OBJECT (object), "changed",
 190                           G_CALLBACK (update_editor_from_object_cb), editor);
 191         g_signal_connect (G_OBJECT (object), "moved",
 192                           G_CALLBACK (update_editor_from_move_cb), editor);
 193
 194         gl_debug (DEBUG_VIEW, "END");
 195
 196         return editor;
 197 }
 198
 199 /*---------------------------------------------------------------------------*/
 200 /* PRIVATE.  editor "changed" callback.                                      */
 201 /*---------------------------------------------------------------------------*/
 202 static void
 203 update_object_from_editor_cb (glObjectEditor *editor,
 204                               glLabelObject  *object)
 205 {
 206         gdouble            x, y, w, h;
 207         glTextNode        *filename;
 208         const GdkPixbuf   *pixbuf;
 209         gdouble            image_w, image_h;
 210         gdouble            new_w, new_h;
 211
 212         gl_debug (DEBUG_VIEW, "START");
 213
 214         g_signal_handlers_block_by_func (G_OBJECT(object),
 215                                          update_editor_from_object_cb,
 216                                          editor);
 217         g_signal_handlers_block_by_func (G_OBJECT(object),
 218                                          update_editor_from_move_cb,
 219                                          editor);
 220
 221
 222         gl_object_editor_get_position (editor, &x, &y);
 223         gl_label_object_set_position (object, x, y);
 224
 225         gl_object_editor_get_size (editor, &w, &h);
 226         gl_label_object_set_size (object, w, h);
 227
 228         filename = gl_object_editor_get_image (editor);
 229         gl_label_image_set_filename (GL_LABEL_IMAGE(object), filename);
 230         gl_text_node_free (&filename);
 231
 232         /* Setting filename may have modified the size. */
 233         gl_label_object_get_size (object, &new_w, &new_h);
 234         if ( (new_w != w) || (new_h != h) )
 235         {
 236                 gl_object_editor_set_size (editor, new_w, new_h);
 237         }
 238
 239         /* It may also have a new base size. */
 240         pixbuf = gl_label_image_get_pixbuf (GL_LABEL_IMAGE(object), NULL);
 241         image_w = gdk_pixbuf_get_width (pixbuf);
 242         image_h = gdk_pixbuf_get_height (pixbuf);
 243         gl_object_editor_set_base_size (editor, image_w, image_h);
 244
 245         g_signal_handlers_unblock_by_func (G_OBJECT(object),
 246                                            update_editor_from_object_cb,
 247                                            editor);
 248         g_signal_handlers_unblock_by_func (G_OBJECT(object),
 249                                            update_editor_from_move_cb,
 250                                            editor);
 251
 252         gl_debug (DEBUG_VIEW, "END");
 253 }
 254
 255 /*---------------------------------------------------------------------------*/
 256 /* PRIVATE. label object "changed" callback.                                 */
 257 /*---------------------------------------------------------------------------*/
 258 static void
 259 update_editor_from_object_cb (glLabelObject  *object,
 260                               glObjectEditor *editor)
 261 {
 262         gdouble            w, h;
 263         const GdkPixbuf   *pixbuf;
 264         gdouble            image_w, image_h;
 265         glTextNode        *filename;
 266         glMerge           *merge;
 267
 268         gl_debug (DEBUG_VIEW, "START");
 269
 270         gl_label_object_get_size (object, &w, &h);
 271         gl_object_editor_set_size (editor, w, h);
 272
 273         pixbuf = gl_label_image_get_pixbuf (GL_LABEL_IMAGE(object), NULL);
 274         image_w = gdk_pixbuf_get_width (pixbuf);
 275         image_h = gdk_pixbuf_get_height (pixbuf);
 276         gl_object_editor_set_base_size (editor, image_w, image_h);
 277
 278         filename = gl_label_image_get_filename (GL_LABEL_IMAGE(object));
 279         merge = gl_label_get_merge (GL_LABEL(object->parent));
 280         if ( filename != NULL ) {
 281                 gl_object_editor_set_image (editor, (merge != NULL), filename);
 282         }
 283
 284         gl_debug (DEBUG_VIEW, "END");
 285 }
 286
 287 /*---------------------------------------------------------------------------*/
 288 /* PRIVATE. label object "moved" callback.                                   */
 289 /*---------------------------------------------------------------------------*/
 290 static void
 291 update_editor_from_move_cb (glLabelObject    *object,
 292                             gdouble           dx,
 293                             gdouble           dy,
 294                             glObjectEditor   *editor)
 295 {
 296         gdouble            x, y;
 297
 298         gl_debug (DEBUG_VIEW, "START");
 299
 300         gl_label_object_get_position (object, &x, &y);
 301         gl_object_editor_set_position (editor, x, y);
 302
 303         gl_debug (DEBUG_VIEW, "END");
 304 }
 305
 306 /*****************************************************************************/
 307 /* Is object at (x,y)?                                                       */
 308 /*****************************************************************************/
 309 static gboolean
 310 object_at (glViewObject  *view_object,
 311            cairo_t       *cr,
 312            gdouble        x,
 313            gdouble        y)
 314 {
 315         glLabelObject    *object;
 316         gdouble           w, h;
 317
 318         object = gl_view_object_get_object (view_object);
 319
 320         gl_label_object_get_size (object, &w, &h);
 321
 322         cairo_rectangle (cr, 0.0, 0.0, w, h);
 323
 324         if (cairo_in_fill (cr, x, y))
 325         {
 326                 return TRUE;
 327         }
 328
 329         return FALSE;
 330 }
 331
 332
 333 /*****************************************************************************/
 334 /* Return apropos cursor for create object mode.                             */
 335 /*****************************************************************************/
 336 GdkCursor *
 337 gl_view_image_get_create_cursor (void)
 338 {
 339         GdkCursor       *cursor = NULL;
 340         GdkPixmap       *pixmap_data, *pixmap_mask;
 341         GdkColor         fg = { 0, 0, 0, 0 };
 342         GdkColor         bg = { 0, 65535, 65535, 65535 };
 343
 344         gl_debug (DEBUG_VIEW, "START");
 345
 346         pixmap_data = gdk_bitmap_create_from_data (NULL,
 347                                                    (gchar *)cursor_image_bits,
 348                                                    cursor_image_width,
 349                                                    cursor_image_height);
 350         pixmap_mask = gdk_bitmap_create_from_data (NULL,
 351                                                    (gchar *)cursor_image_mask_bits,
 352                                                    cursor_image_mask_width,
 353                                                    cursor_image_mask_height);
 354         cursor = gdk_cursor_new_from_pixmap (pixmap_data, pixmap_mask, &fg,
 355                                              &bg, cursor_image_x_hot,
 356                                              cursor_image_y_hot);
 357
 358         gl_debug (DEBUG_VIEW, "END");
 359
 360         return cursor;
 361 }
 362
 363 /*****************************************************************************/
 364 /* Object creation handler: button press event.                              */
 365 /*****************************************************************************/
 366 void
 367 gl_view_image_create_button_press_event   (glView *view,
 368                                            gdouble x,
 369                                            gdouble y)
 370 {
 371         GObject             *object;
 372
 373         gl_view_unselect_all (view);
 374
 375         object = gl_label_image_new (view->label);
 376         gl_label_object_set_position (GL_LABEL_OBJECT(object), x, y);
 377         gl_label_object_set_size (GL_LABEL_OBJECT(object), 0.0, 0.0);
 378
 379         view->create_object = GL_LABEL_OBJECT (object);
 380         view->create_x0 = x;
 381         view->create_y0 = y;
 382 }
 383
 384 /*****************************************************************************/
 385 /* Object creation handler: motion event.                                    */
 386 /*****************************************************************************/
 387 void
 388 gl_view_image_create_motion_event     (glView *view,
 389                                        gdouble x,
 390                                        gdouble y)
 391 {
 392         gdouble w, h;
 393
 394         gl_label_object_set_position (GL_LABEL_OBJECT(view->create_object),
 395                                       MIN (x, view->create_x0), MIN (y, view->create_y0));
 396         w = MAX (x, view->create_x0) - MIN (x, view->create_x0);
 397         h = MAX (y, view->create_y0) - MIN (y, view->create_y0);
 398         gl_label_object_set_size (GL_LABEL_OBJECT(view->create_object), w, h);
 399 }
 400
 401 /*****************************************************************************/
 402 /* Object creation handler: button relesase event.                           */
 403 /*****************************************************************************/
 404 void
 405 gl_view_image_create_button_release_event (glView *view,
 406                                            gdouble x,
 407                                            gdouble y)
 408 {
 409         gdouble              w, h;
 410
 411         if ((view->create_x0 == x) && (view->create_y0 == y)) {
 412                 x = view->create_x0 + 36.0;
 413                 y = view->create_y0 + 36.0;
 414         }
 415         gl_label_object_set_position (GL_LABEL_OBJECT(view->create_object),
 416                                       MIN (x, view->create_x0), MIN (y, view->create_y0));
 417         w = MAX (x, view->create_x0) - MIN (x, view->create_x0);
 418         h = MAX (y, view->create_y0) - MIN (y, view->create_y0);
 419         gl_label_object_set_size (GL_LABEL_OBJECT(view->create_object), w, h);
 420 }
 421