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

   1 /*
   2  *  object-editor-size-page.c
   3  *  Copyright (C) 2003-2009  Jim Evins <evins@snaught.com>.
   4  *
   5  *  This file is part of gLabels.
   6  *
   7  *  gLabels is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation, either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  gLabels is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22
  23 #include "object-editor.h"
  24
  25 #include <glib/gi18n.h>
  26 #include <gtk/gtk.h>
  27 #include <math.h>
  28
  29 #include "prefs.h"
  30 #include "wdgt-chain-button.h"
  31 #include "builder-util.h"
  32 #include "units-util.h"
  33
  34 #include "object-editor-private.h"
  35
  36 #include "debug.h"
  37
  38
  39 /*===========================================*/
  40 /* Private macros                            */
  41 /*===========================================*/
  42
  43
  44 /*===========================================*/
  45 /* Private data types                        */
  46 /*===========================================*/
  47
  48
  49 /*===========================================*/
  50 /* Private globals                           */
  51 /*===========================================*/
  52
  53
  54 /*===========================================*/
  55 /* Local function prototypes                 */
  56 /*===========================================*/
  57
  58 static void aspect_toggle_cb                    (glObjectEditor        *editor);
  59 static void size_reset_cb                       (glObjectEditor        *editor);
  60 static void w_spin_cb                           (glObjectEditor        *editor);
  61 static void h_spin_cb                           (glObjectEditor        *editor);
  62
  63
  64 /*--------------------------------------------------------------------------*/
  65 /* PRIVATE.  Prepare size page.                                             */
  66 /*--------------------------------------------------------------------------*/
  67 void
  68 gl_object_editor_prepare_size_page (glObjectEditor       *editor)
  69 {
  70         lglUnits      units;
  71         const gchar  *units_string;
  72         gdouble       climb_rate;
  73         gint          digits;
  74
  75         gl_debug (DEBUG_EDITOR, "START");
  76
  77         /* Extract widgets from XML tree. */
  78         gl_builder_util_get_widgets (editor->priv->builder,
  79                                      "size_page_vbox",          &editor->priv->size_page_vbox,
  80                                      "size_w_spin",             &editor->priv->size_w_spin,
  81                                      "size_h_spin",             &editor->priv->size_h_spin,
  82                                      "size_w_units_label",      &editor->priv->size_w_units_label,
  83                                      "size_h_units_label",      &editor->priv->size_h_units_label,
  84                                      "size_aspect_vbox",        &editor->priv->size_aspect_vbox,
  85                                      "size_reset_image_button", &editor->priv->size_reset_image_button,
  86                                      NULL);
  87
  88         editor->priv->size_aspect_checkbutton = gl_wdgt_chain_button_new (GL_WDGT_CHAIN_RIGHT);
  89         gtk_widget_set_tooltip_text (editor->priv->size_aspect_checkbutton, _("Lock aspect ratio."));
  90         gl_wdgt_chain_button_set_active (GL_WDGT_CHAIN_BUTTON(editor->priv->size_aspect_checkbutton),
  91                                          TRUE);
  92         gtk_box_pack_start (GTK_BOX (editor->priv->size_aspect_vbox),
  93                             editor->priv->size_aspect_checkbutton,
  94                             TRUE, TRUE, 0);
  95
  96
  97         /* Get configuration information */
  98         units = gl_prefs_model_get_units (gl_prefs);
  99         units_string = lgl_units_get_name (units);
 100         editor->priv->units_per_point = lgl_units_get_units_per_point (units);
 101         climb_rate = gl_units_util_get_step_size (units);
 102         digits = gl_units_util_get_precision (units);
 103
 104         /* Modify widgets based on configuration */
 105         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_w_spin), digits);
 106         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 107                                         climb_rate, 10.0*climb_rate);
 108         gtk_label_set_text (GTK_LABEL(editor->priv->size_w_units_label), units_string);
 109         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_h_spin), digits);
 110         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 111                                         climb_rate, 10.0*climb_rate);
 112         gtk_label_set_text (GTK_LABEL(editor->priv->size_h_units_label), units_string);
 113
 114
 115         /* Connect signals */
 116         g_signal_connect_swapped (G_OBJECT (editor->priv->size_aspect_checkbutton),
 117                                   "toggled",
 118                                   G_CALLBACK (aspect_toggle_cb),
 119                                   G_OBJECT (editor));
 120         g_signal_connect_swapped (G_OBJECT (editor->priv->size_w_spin),
 121                                   "value-changed",
 122                                   G_CALLBACK (w_spin_cb),
 123                                   G_OBJECT (editor));
 124         g_signal_connect_swapped (G_OBJECT (editor->priv->size_h_spin),
 125                                   "value-changed",
 126                                   G_CALLBACK (h_spin_cb),
 127                                   G_OBJECT (editor));
 128         g_signal_connect_swapped (G_OBJECT (editor->priv->size_reset_image_button),
 129                                   "clicked",
 130                                   G_CALLBACK (size_reset_cb),
 131                                   G_OBJECT (editor));
 132
 133         gl_debug (DEBUG_EDITOR, "END");
 134 }
 135
 136
 137 /*--------------------------------------------------------------------------*/
 138 /* PRIVATE.  Maintain aspect ratio checkbox callback.                       */
 139 /*--------------------------------------------------------------------------*/
 140 static void
 141 aspect_toggle_cb (glObjectEditor *editor)
 142 {
 143         glWdgtChainButton *toggle;
 144         gdouble            w, h;
 145
 146         gl_debug (DEBUG_EDITOR, "START");
 147
 148         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 149
 150         if (gl_wdgt_chain_button_get_active (toggle)) {
 151
 152                 w = gtk_spin_button_get_value (GTK_SPIN_BUTTON(editor->priv->size_w_spin));
 153                 h = gtk_spin_button_get_value (GTK_SPIN_BUTTON(editor->priv->size_h_spin));
 154
 155                 editor->priv->size_aspect_ratio = h / w;
 156
 157         }
 158
 159         gl_debug (DEBUG_EDITOR, "END");
 160 }
 161
 162
 163 /*--------------------------------------------------------------------------*/
 164 /* PRIVATE.  W spin button changed callback.                                */
 165 /*--------------------------------------------------------------------------*/
 166 static void
 167 w_spin_cb (glObjectEditor *editor)
 168 {
 169         gdouble            w, h;
 170         glWdgtChainButton *toggle;
 171
 172         gl_debug (DEBUG_EDITOR, "START");
 173
 174         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 175
 176         if (gl_wdgt_chain_button_get_active (toggle)) {
 177
 178                 w = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 179
 180                 h = w * editor->priv->size_aspect_ratio;
 181
 182                 /* Update our sibling control, blocking recursion. */
 183                 g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 184                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), h);
 185                 g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 186         }
 187
 188         gl_object_editor_size_changed_cb (editor);
 189
 190         gl_debug (DEBUG_EDITOR, "END");
 191 }
 192
 193
 194 /*--------------------------------------------------------------------------*/
 195 /* PRIVATE.  H spin button changed callback.                                */
 196 /*--------------------------------------------------------------------------*/
 197 static void
 198 h_spin_cb (glObjectEditor *editor)
 199 {
 200         gdouble            w, h;
 201         glWdgtChainButton *toggle;
 202
 203         gl_debug (DEBUG_EDITOR, "START");
 204
 205         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 206
 207         if (gl_wdgt_chain_button_get_active (toggle)) {
 208
 209                 h = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 210
 211                 w = h / editor->priv->size_aspect_ratio;
 212
 213                 /* Update our sibling control, blocking recursion. */
 214                 g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 215                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), w);
 216                 g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 217         }
 218
 219         gl_object_editor_size_changed_cb (editor);
 220
 221         gl_debug (DEBUG_EDITOR, "END");
 222 }
 223
 224
 225 /*--------------------------------------------------------------------------*/
 226 /* PRIVATE.  Reset image size callback.                                     */
 227 /*--------------------------------------------------------------------------*/
 228 static void
 229 size_reset_cb (glObjectEditor *editor)
 230 {
 231         gdouble w_base, h_base;
 232         gdouble w_max, h_max, wh_max;
 233         gdouble aspect_ratio;
 234
 235         gl_debug (DEBUG_EDITOR, "START");
 236
 237
 238         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 239         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 240
 241
 242         w_base = editor->priv->w_base;
 243         h_base = editor->priv->h_base;
 244
 245         w_max = editor->priv->w_max;
 246         h_max = editor->priv->h_max;
 247         wh_max = MAX( w_max, h_max );
 248
 249         if ( (w_base > wh_max) || (h_base > wh_max) ) {
 250
 251                 aspect_ratio = h_base / w_base;
 252
 253                 if ( aspect_ratio < 1.0 ) {
 254                         w_base = wh_max;
 255                         h_base = wh_max * aspect_ratio;
 256
 257                 } else {
 258                         w_base = wh_max / aspect_ratio;
 259                         h_base = wh_max;
 260                 }
 261         }
 262
 263         w_base *= editor->priv->units_per_point;
 264         h_base *= editor->priv->units_per_point;
 265
 266         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin),
 267                                    w_base);
 268         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin),
 269                                    h_base);
 270
 271
 272         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 273         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 274
 275
 276         gl_object_editor_size_changed_cb (editor);
 277
 278         gl_debug (DEBUG_EDITOR, "END");
 279 }
 280
 281
 282 /*****************************************************************************/
 283 /* Set size.                                                                 */
 284 /*****************************************************************************/
 285 void
 286 gl_object_editor_set_size (glObjectEditor      *editor,
 287                            gdouble              w,
 288                            gdouble              h)
 289 {
 290         gl_debug (DEBUG_EDITOR, "START");
 291
 292
 293         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 294         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 295
 296
 297         /* save a copy in internal units */
 298         editor->priv->w = w;
 299         editor->priv->h = h;
 300
 301         /* convert internal units to displayed units */
 302         gl_debug (DEBUG_EDITOR, "internal w,h = %g, %g", w, h);
 303         w *= editor->priv->units_per_point;
 304         h *= editor->priv->units_per_point;
 305         gl_debug (DEBUG_EDITOR, "display w,h = %g, %g", w, h);
 306
 307         /* Set widget values */
 308         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), w);
 309         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), h);
 310
 311         /* Update aspect ratio */
 312         editor->priv->size_aspect_ratio = h / w;
 313
 314
 315         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 316         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 317
 318
 319         gl_debug (DEBUG_EDITOR, "END");
 320 }
 321
 322
 323 /*****************************************************************************/
 324 /* Set maximum size.                                                         */
 325 /*****************************************************************************/
 326 void
 327 gl_object_editor_set_max_size (glObjectEditor      *editor,
 328                                gdouble              w_max,
 329                                gdouble              h_max)
 330 {
 331         gdouble tmp;
 332         gdouble wh_max;
 333
 334         gl_debug (DEBUG_EDITOR, "START");
 335
 336
 337         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 338         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 339
 340
 341         /* save a copy in internal units */
 342         editor->priv->w_max = w_max;
 343         editor->priv->h_max = h_max;
 344
 345         /* convert internal units to displayed units */
 346         gl_debug (DEBUG_EDITOR, "internal w_max,h_max = %g, %g", w_max, h_max);
 347         w_max *= editor->priv->units_per_point;
 348         h_max *= editor->priv->units_per_point;
 349         wh_max = MAX( w_max, h_max );
 350         gl_debug (DEBUG_EDITOR, "display w_max,h_max = %g, %g", w_max, h_max);
 351
 352         /* Set widget values */
 353         tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 354         gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->size_w_spin),
 355                                    0.0, 2.0*wh_max);
 356         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), tmp);
 357         tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 358         gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->size_h_spin),
 359                                    0.0, 2.0*wh_max);
 360         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), tmp);
 361
 362
 363         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 364         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 365
 366
 367         gl_debug (DEBUG_EDITOR, "END");
 368 }
 369
 370
 371 /*****************************************************************************/
 372 /* Set base or natural size of image.                                        */
 373 /*****************************************************************************/
 374 void
 375 gl_object_editor_set_base_size    (glObjectEditor      *editor,
 376                                    gdouble              w_base,
 377                                    gdouble              h_base)
 378 {
 379         gl_debug (DEBUG_EDITOR, "Setting w_base = %g", w_base);
 380         gl_debug (DEBUG_EDITOR, "Setting h_base = %g", h_base);
 381
 382         editor->priv->w_base = w_base;
 383         editor->priv->h_base = h_base;
 384 }
 385
 386
 387 /*****************************************************************************/
 388 /* Query size.                                                               */
 389 /*****************************************************************************/
 390 void
 391 gl_object_editor_get_size (glObjectEditor      *editor,
 392                            gdouble             *w,
 393                            gdouble             *h)
 394 {
 395         gl_debug (DEBUG_EDITOR, "START");
 396
 397
 398         /* Get values from widgets */
 399         *w = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 400         *h = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 401
 402         /* convert everything back to our internal units (points) */
 403         *w /= editor->priv->units_per_point;
 404         *h /= editor->priv->units_per_point;
 405
 406         /* save a copy in internal units */
 407         editor->priv->w = *w;
 408         editor->priv->h = *h;
 409
 410         gl_debug (DEBUG_EDITOR, "END");
 411 }
 412
 413
 414 /*****************************************************************************/
 415 /* PRIVATE. Prefs changed callback.  Update units related items.            */
 416 /*****************************************************************************/
 417 void
 418 size_prefs_changed_cb (glObjectEditor *editor)
 419 {
 420         lglUnits      units;
 421         const gchar  *units_string;
 422         gdouble       climb_rate;
 423         gint          digits;
 424
 425         gl_debug (DEBUG_EDITOR, "START");
 426
 427
 428         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 429         g_signal_handlers_block_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 430
 431
 432         /* Get new configuration information */
 433         units = gl_prefs_model_get_units (gl_prefs);
 434         units_string = lgl_units_get_name (units);
 435         editor->priv->units_per_point = lgl_units_get_units_per_point (units);
 436         climb_rate = gl_units_util_get_step_size (units);
 437         digits = gl_units_util_get_precision (units);
 438
 439         /* Update characteristics of w_spin/h_spin */
 440         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_w_spin), digits);
 441         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_h_spin), digits);
 442         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 443                                         climb_rate, 10.0*climb_rate);
 444         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 445                                         climb_rate, 10.0*climb_rate);
 446
 447         /* Update units_labels */
 448         gtk_label_set_text (GTK_LABEL(editor->priv->size_w_units_label),
 449                             units_string);
 450         gtk_label_set_text (GTK_LABEL(editor->priv->size_h_units_label),
 451                             units_string);
 452
 453         /* Update values of w_spin/h_spin */
 454         gl_object_editor_set_size (editor, editor->priv->w, editor->priv->h);
 455         gl_object_editor_set_max_size (editor, editor->priv->w_max, editor->priv->h_max);
 456
 457
 458         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_w_spin), w_spin_cb, editor);
 459         g_signal_handlers_unblock_by_func (G_OBJECT (editor->priv->size_h_spin), h_spin_cb, editor);
 460
 461
 462         gl_debug (DEBUG_EDITOR, "END");
 463 }
 464
 465
 466
 467 /*
 468  * Local Variables:       -- emacs
 469  * mode: C                -- emacs
 470  * c-basic-offset: 8      -- emacs
 471  * tab-width: 8           -- emacs
 472  * indent-tabs-mode: nil  -- emacs
 473  * End:                   -- emacs
 474  */