git.sur5r.net Git - glabels/blob - glabels2/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/gtklabel.h>
  27 #include <gtk/gtkspinbutton.h>
  28 #include <math.h>
  29
  30 #include "prefs.h"
  31 #include "wdgt-chain-button.h"
  32 #include "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                                     glObjectEditorOption  option)
  70 {
  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_util_get_builder_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         gl_wdgt_chain_button_set_active (GL_WDGT_CHAIN_BUTTON(editor->priv->size_aspect_checkbutton),
  90                                          TRUE);
  91         gtk_box_pack_start (GTK_BOX (editor->priv->size_aspect_vbox),
  92                             editor->priv->size_aspect_checkbutton,
  93                             FALSE, FALSE, 0);
  94
  95
  96         /* Get configuration information */
  97         units_string = gl_prefs_get_units_string ();
  98         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
  99         climb_rate = gl_prefs_get_units_step_size ();
 100         digits = gl_prefs_get_units_precision ();
 101
 102         /* Modify widgets based on configuration */
 103         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_w_spin), digits);
 104         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 105                                         climb_rate, 10.0*climb_rate);
 106         gtk_label_set_text (GTK_LABEL(editor->priv->size_w_units_label), units_string);
 107         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_h_spin), digits);
 108         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 109                                         climb_rate, 10.0*climb_rate);
 110         gtk_label_set_text (GTK_LABEL(editor->priv->size_h_units_label), units_string);
 111
 112         /* Un-hide */
 113         gtk_widget_show_all (editor->priv->size_page_vbox);
 114         if (option != GL_OBJECT_EDITOR_SIZE_IMAGE_PAGE) {
 115                 gtk_widget_hide (editor->priv->size_reset_image_button);
 116         }
 117
 118         /* Connect signals */
 119         g_signal_connect_swapped (G_OBJECT (editor->priv->size_aspect_checkbutton),
 120                                   "toggled",
 121                                   G_CALLBACK (aspect_toggle_cb),
 122                                   G_OBJECT (editor));
 123         g_signal_connect_swapped (G_OBJECT (editor->priv->size_w_spin),
 124                                   "changed",
 125                                   G_CALLBACK (w_spin_cb),
 126                                   G_OBJECT (editor));
 127         g_signal_connect_swapped (G_OBJECT (editor->priv->size_h_spin),
 128                                   "changed",
 129                                   G_CALLBACK (h_spin_cb),
 130                                   G_OBJECT (editor));
 131
 132         if (option == GL_OBJECT_EDITOR_SIZE_IMAGE_PAGE) {
 133                 g_signal_connect_swapped (G_OBJECT (editor->priv->size_reset_image_button),
 134                                           "clicked",
 135                                           G_CALLBACK (size_reset_cb),
 136                                           G_OBJECT (editor));
 137         }
 138
 139         gl_debug (DEBUG_EDITOR, "END");
 140 }
 141
 142
 143 /*--------------------------------------------------------------------------*/
 144 /* PRIVATE.  Maintain aspect ratio checkbox callback.                       */
 145 /*--------------------------------------------------------------------------*/
 146 static void
 147 aspect_toggle_cb (glObjectEditor *editor)
 148 {
 149         glWdgtChainButton *toggle;
 150         gdouble            w, h;
 151
 152         if (editor->priv->stop_signals) return;
 153
 154         gl_debug (DEBUG_EDITOR, "START");
 155
 156         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 157
 158         if (gl_wdgt_chain_button_get_active (toggle)) {
 159
 160                 w = gtk_spin_button_get_value (GTK_SPIN_BUTTON(editor->priv->size_w_spin));
 161                 h = gtk_spin_button_get_value (GTK_SPIN_BUTTON(editor->priv->size_h_spin));
 162
 163                 editor->priv->size_aspect_ratio = h / w;
 164
 165         }
 166
 167         gl_debug (DEBUG_EDITOR, "END");
 168 }
 169
 170
 171 /*--------------------------------------------------------------------------*/
 172 /* PRIVATE.  W spin button changed callback.                                */
 173 /*--------------------------------------------------------------------------*/
 174 static void
 175 w_spin_cb (glObjectEditor *editor)
 176 {
 177         gdouble            w, h;
 178         glWdgtChainButton *toggle;
 179
 180         if (editor->priv->stop_signals) return;
 181
 182         gl_debug (DEBUG_EDITOR, "START");
 183
 184         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 185
 186         if (gl_wdgt_chain_button_get_active (toggle)) {
 187
 188                 w = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 189
 190                 h = w * editor->priv->size_aspect_ratio;
 191
 192                 /* Update our sibling control, blocking recursion. */
 193                 editor->priv->stop_signals = TRUE;
 194                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), h);
 195                 editor->priv->stop_signals = FALSE;
 196         }
 197
 198         /* Emit our "changed" signal */
 199         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 200         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[SIZE_CHANGED], 0);
 201
 202         gl_debug (DEBUG_EDITOR, "END");
 203 }
 204
 205
 206 /*--------------------------------------------------------------------------*/
 207 /* PRIVATE.  H spin button changed callback.                                */
 208 /*--------------------------------------------------------------------------*/
 209 static void
 210 h_spin_cb (glObjectEditor *editor)
 211 {
 212         gdouble            w, h;
 213         glWdgtChainButton *toggle;
 214
 215         if (editor->priv->stop_signals) return;
 216
 217         gl_debug (DEBUG_EDITOR, "START");
 218
 219         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 220
 221         if (gl_wdgt_chain_button_get_active (toggle)) {
 222
 223                 h = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 224
 225                 w = h / editor->priv->size_aspect_ratio;
 226
 227                 /* Update our sibling control, blocking recursion. */
 228                 editor->priv->stop_signals = TRUE;
 229                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), w);
 230                 editor->priv->stop_signals = FALSE;
 231         }
 232
 233         /* Emit our "changed" signal */
 234         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 235         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[SIZE_CHANGED], 0);
 236
 237         gl_debug (DEBUG_EDITOR, "END");
 238 }
 239
 240
 241 /*--------------------------------------------------------------------------*/
 242 /* PRIVATE.  Reset image size callback.                                     */
 243 /*--------------------------------------------------------------------------*/
 244 static void
 245 size_reset_cb (glObjectEditor *editor)
 246 {
 247         gdouble w_base, h_base;
 248         gdouble w_max, h_max, wh_max;
 249         gdouble aspect_ratio;
 250
 251         if (editor->priv->stop_signals) return;
 252
 253         gl_debug (DEBUG_EDITOR, "START");
 254
 255         editor->priv->stop_signals = TRUE;
 256
 257         w_base = editor->priv->w_base;
 258         h_base = editor->priv->h_base;
 259
 260         w_max = editor->priv->w_max;
 261         h_max = editor->priv->h_max;
 262         wh_max = MAX( w_max, h_max );
 263
 264         if ( (w_base > wh_max) || (h_base > wh_max) ) {
 265
 266                 aspect_ratio = h_base / w_base;
 267
 268                 if ( aspect_ratio < 1.0 ) {
 269                         w_base = wh_max;
 270                         h_base = wh_max * aspect_ratio;
 271
 272                 } else {
 273                         w_base = wh_max / aspect_ratio;
 274                         h_base = wh_max;
 275                 }
 276         }
 277
 278         w_base *= editor->priv->units_per_point;
 279         h_base *= editor->priv->units_per_point;
 280
 281         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin),
 282                                    w_base);
 283         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin),
 284                                    h_base);
 285
 286         /* Emit our "changed" signal */
 287         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 288         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[SIZE_CHANGED], 0);
 289
 290         editor->priv->stop_signals = FALSE;
 291
 292         gl_debug (DEBUG_EDITOR, "END");
 293 }
 294
 295
 296 /*****************************************************************************/
 297 /* Set size.                                                                 */
 298 /*****************************************************************************/
 299 void
 300 gl_object_editor_set_size (glObjectEditor      *editor,
 301                              gdouble                w,
 302                              gdouble                h)
 303 {
 304         gl_debug (DEBUG_EDITOR, "START");
 305
 306         editor->priv->stop_signals = TRUE;
 307
 308         /* save a copy in internal units */
 309         editor->priv->w = w;
 310         editor->priv->h = h;
 311
 312         /* convert internal units to displayed units */
 313         gl_debug (DEBUG_EDITOR, "internal w,h = %g, %g", w, h);
 314         w *= editor->priv->units_per_point;
 315         h *= editor->priv->units_per_point;
 316         gl_debug (DEBUG_EDITOR, "display w,h = %g, %g", w, h);
 317
 318         /* Set widget values */
 319         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), w);
 320         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), h);
 321
 322         /* Update aspect ratio */
 323         editor->priv->size_aspect_ratio = h / w;
 324
 325         editor->priv->stop_signals = FALSE;
 326
 327         gl_debug (DEBUG_EDITOR, "END");
 328 }
 329
 330
 331 /*****************************************************************************/
 332 /* Set maximum size.                                                         */
 333 /*****************************************************************************/
 334 void
 335 gl_object_editor_set_max_size (glObjectEditor      *editor,
 336                                gdouble              w_max,
 337                                gdouble              h_max)
 338 {
 339         gdouble tmp;
 340         gdouble wh_max;
 341
 342         gl_debug (DEBUG_EDITOR, "START");
 343
 344         if (editor->priv->size_page_vbox)
 345         {
 346
 347                 editor->priv->stop_signals = TRUE;
 348
 349                 /* save a copy in internal units */
 350                 editor->priv->w_max = w_max;
 351                 editor->priv->h_max = h_max;
 352
 353                 /* convert internal units to displayed units */
 354                 gl_debug (DEBUG_EDITOR, "internal w_max,h_max = %g, %g", w_max, h_max);
 355                 w_max *= editor->priv->units_per_point;
 356                 h_max *= editor->priv->units_per_point;
 357                 wh_max = MAX( w_max, h_max );
 358                 gl_debug (DEBUG_EDITOR, "display w_max,h_max = %g, %g", w_max, h_max);
 359
 360                 /* Set widget values */
 361                 tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 362                 gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->size_w_spin),
 363                                            0.0, 2.0*wh_max);
 364                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), tmp);
 365                 tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 366                 gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->size_h_spin),
 367                                            0.0, 2.0*wh_max);
 368                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), tmp);
 369
 370                 editor->priv->stop_signals = FALSE;
 371
 372         }
 373
 374         gl_debug (DEBUG_EDITOR, "END");
 375 }
 376
 377
 378 /*****************************************************************************/
 379 /* Set base or natural size of image.                                        */
 380 /*****************************************************************************/
 381 void
 382 gl_object_editor_set_base_size    (glObjectEditor      *editor,
 383                                    gdouble              w_base,
 384                                    gdouble              h_base)
 385 {
 386         gl_debug (DEBUG_EDITOR, "Setting w_base = %g", w_base);
 387         gl_debug (DEBUG_EDITOR, "Setting h_base = %g", h_base);
 388
 389         editor->priv->w_base = w_base;
 390         editor->priv->h_base = h_base;
 391 }
 392
 393
 394 /*****************************************************************************/
 395 /* Query size.                                                               */
 396 /*****************************************************************************/
 397 void
 398 gl_object_editor_get_size (glObjectEditor      *editor,
 399                            gdouble             *w,
 400                            gdouble             *h)
 401 {
 402         gl_debug (DEBUG_EDITOR, "START");
 403
 404
 405         /* Get values from widgets */
 406         *w = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 407         *h = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 408
 409         /* convert everything back to our internal units (points) */
 410         *w /= editor->priv->units_per_point;
 411         *h /= editor->priv->units_per_point;
 412
 413         /* save a copy in internal units */
 414         editor->priv->w = *w;
 415         editor->priv->h = *h;
 416
 417         gl_debug (DEBUG_EDITOR, "END");
 418 }
 419
 420
 421 /*****************************************************************************/
 422 /* PRIVATE. Prefs changed callback.  Update units related items.            */
 423 /*****************************************************************************/
 424 void
 425 size_prefs_changed_cb (glObjectEditor *editor)
 426 {
 427         const gchar  *units_string;
 428         gdouble       climb_rate;
 429         gint          digits;
 430
 431         gl_debug (DEBUG_EDITOR, "START");
 432
 433         /* Get new configuration information */
 434         units_string = gl_prefs_get_units_string ();
 435         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
 436         climb_rate = gl_prefs_get_units_step_size ();
 437         digits = gl_prefs_get_units_precision ();
 438
 439         /* Update characteristics of w_spin/h_spin */
 440         editor->priv->stop_signals = TRUE;
 441         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 442                                     digits);
 443         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 444                                     digits);
 445         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 446                                         climb_rate, 10.0*climb_rate);
 447         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 448                                         climb_rate, 10.0*climb_rate);
 449         editor->priv->stop_signals = FALSE;
 450
 451         /* Update units_labels */
 452         gtk_label_set_text (GTK_LABEL(editor->priv->size_w_units_label),
 453                             units_string);
 454         gtk_label_set_text (GTK_LABEL(editor->priv->size_h_units_label),
 455                             units_string);
 456
 457         /* Update values of w_spin/h_spin */
 458         gl_object_editor_set_size (editor,
 459                                    editor->priv->w,
 460                                    editor->priv->h);
 461         gl_object_editor_set_max_size (editor,
 462                                        editor->priv->w_max,
 463                                        editor->priv->h_max);
 464
 465         gl_debug (DEBUG_EDITOR, "END");
 466 }
 467
 468
 469
 470 /*
 471  * Local Variables:       -- emacs
 472  * mode: C                -- emacs
 473  * c-basic-offset: 8      -- emacs
 474  * tab-width: 8           -- emacs
 475  * indent-tabs-mode: nil  -- emacs
 476  * End:                   -- emacs
 477  */