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/gtk.h>
  27 #include <math.h>
  28
  29 #include "prefs.h"
  30 #include "wdgt-chain-button.h"
  31 #include "builder-util.h"
  32
  33 #include "object-editor-private.h"
  34
  35 #include "debug.h"
  36
  37
  38 /*===========================================*/
  39 /* Private macros                            */
  40 /*===========================================*/
  41
  42
  43 /*===========================================*/
  44 /* Private data types                        */
  45 /*===========================================*/
  46
  47
  48 /*===========================================*/
  49 /* Private globals                           */
  50 /*===========================================*/
  51
  52
  53 /*===========================================*/
  54 /* Local function prototypes                 */
  55 /*===========================================*/
  56
  57 static void aspect_toggle_cb                    (glObjectEditor        *editor);
  58 static void size_reset_cb                       (glObjectEditor        *editor);
  59 static void w_spin_cb                           (glObjectEditor        *editor);
  60 static void h_spin_cb                           (glObjectEditor        *editor);
  61
  62
  63 /*--------------------------------------------------------------------------*/
  64 /* PRIVATE.  Prepare size page.                                             */
  65 /*--------------------------------------------------------------------------*/
  66 void
  67 gl_object_editor_prepare_size_page (glObjectEditor       *editor,
  68                                     glObjectEditorOption  option)
  69 {
  70         const gchar  *units_string;
  71         gdouble       climb_rate;
  72         gint          digits;
  73
  74         gl_debug (DEBUG_EDITOR, "START");
  75
  76         /* Extract widgets from XML tree. */
  77         gl_builder_util_get_widgets (editor->priv->builder,
  78                                      "size_page_vbox",          &editor->priv->size_page_vbox,
  79                                      "size_w_spin",             &editor->priv->size_w_spin,
  80                                      "size_h_spin",             &editor->priv->size_h_spin,
  81                                      "size_w_units_label",      &editor->priv->size_w_units_label,
  82                                      "size_h_units_label",      &editor->priv->size_h_units_label,
  83                                      "size_aspect_vbox",        &editor->priv->size_aspect_vbox,
  84                                      "size_reset_image_button", &editor->priv->size_reset_image_button,
  85                                      NULL);
  86
  87         editor->priv->size_aspect_checkbutton = gl_wdgt_chain_button_new (GL_WDGT_CHAIN_RIGHT);
  88         gl_wdgt_chain_button_set_active (GL_WDGT_CHAIN_BUTTON(editor->priv->size_aspect_checkbutton),
  89                                          TRUE);
  90         gtk_box_pack_start (GTK_BOX (editor->priv->size_aspect_vbox),
  91                             editor->priv->size_aspect_checkbutton,
  92                             FALSE, FALSE, 0);
  93
  94
  95         /* Get configuration information */
  96         units_string = gl_prefs_get_units_string ();
  97         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
  98         climb_rate = gl_prefs_get_units_step_size ();
  99         digits = gl_prefs_get_units_precision ();
 100
 101         /* Modify widgets based on configuration */
 102         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_w_spin), digits);
 103         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 104                                         climb_rate, 10.0*climb_rate);
 105         gtk_label_set_text (GTK_LABEL(editor->priv->size_w_units_label), units_string);
 106         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_h_spin), digits);
 107         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 108                                         climb_rate, 10.0*climb_rate);
 109         gtk_label_set_text (GTK_LABEL(editor->priv->size_h_units_label), units_string);
 110
 111         /* Un-hide */
 112         gtk_widget_show_all (editor->priv->size_page_vbox);
 113         if (option != GL_OBJECT_EDITOR_SIZE_IMAGE_PAGE) {
 114                 gtk_widget_hide (editor->priv->size_reset_image_button);
 115         }
 116
 117         /* Connect signals */
 118         g_signal_connect_swapped (G_OBJECT (editor->priv->size_aspect_checkbutton),
 119                                   "toggled",
 120                                   G_CALLBACK (aspect_toggle_cb),
 121                                   G_OBJECT (editor));
 122         g_signal_connect_swapped (G_OBJECT (editor->priv->size_w_spin),
 123                                   "changed",
 124                                   G_CALLBACK (w_spin_cb),
 125                                   G_OBJECT (editor));
 126         g_signal_connect_swapped (G_OBJECT (editor->priv->size_h_spin),
 127                                   "changed",
 128                                   G_CALLBACK (h_spin_cb),
 129                                   G_OBJECT (editor));
 130
 131         if (option == GL_OBJECT_EDITOR_SIZE_IMAGE_PAGE) {
 132                 g_signal_connect_swapped (G_OBJECT (editor->priv->size_reset_image_button),
 133                                           "clicked",
 134                                           G_CALLBACK (size_reset_cb),
 135                                           G_OBJECT (editor));
 136         }
 137
 138         gl_debug (DEBUG_EDITOR, "END");
 139 }
 140
 141
 142 /*--------------------------------------------------------------------------*/
 143 /* PRIVATE.  Maintain aspect ratio checkbox callback.                       */
 144 /*--------------------------------------------------------------------------*/
 145 static void
 146 aspect_toggle_cb (glObjectEditor *editor)
 147 {
 148         glWdgtChainButton *toggle;
 149         gdouble            w, h;
 150
 151         if (editor->priv->stop_signals) return;
 152
 153         gl_debug (DEBUG_EDITOR, "START");
 154
 155         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 156
 157         if (gl_wdgt_chain_button_get_active (toggle)) {
 158
 159                 w = gtk_spin_button_get_value (GTK_SPIN_BUTTON(editor->priv->size_w_spin));
 160                 h = gtk_spin_button_get_value (GTK_SPIN_BUTTON(editor->priv->size_h_spin));
 161
 162                 editor->priv->size_aspect_ratio = h / w;
 163
 164         }
 165
 166         gl_debug (DEBUG_EDITOR, "END");
 167 }
 168
 169
 170 /*--------------------------------------------------------------------------*/
 171 /* PRIVATE.  W spin button changed callback.                                */
 172 /*--------------------------------------------------------------------------*/
 173 static void
 174 w_spin_cb (glObjectEditor *editor)
 175 {
 176         gdouble            w, h;
 177         glWdgtChainButton *toggle;
 178
 179         if (editor->priv->stop_signals) return;
 180
 181         gl_debug (DEBUG_EDITOR, "START");
 182
 183         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 184
 185         if (gl_wdgt_chain_button_get_active (toggle)) {
 186
 187                 w = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 188
 189                 h = w * editor->priv->size_aspect_ratio;
 190
 191                 /* Update our sibling control, blocking recursion. */
 192                 editor->priv->stop_signals = TRUE;
 193                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), h);
 194                 editor->priv->stop_signals = FALSE;
 195         }
 196
 197         /* Emit our "changed" signal */
 198         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 199         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[SIZE_CHANGED], 0);
 200
 201         gl_debug (DEBUG_EDITOR, "END");
 202 }
 203
 204
 205 /*--------------------------------------------------------------------------*/
 206 /* PRIVATE.  H spin button changed callback.                                */
 207 /*--------------------------------------------------------------------------*/
 208 static void
 209 h_spin_cb (glObjectEditor *editor)
 210 {
 211         gdouble            w, h;
 212         glWdgtChainButton *toggle;
 213
 214         if (editor->priv->stop_signals) return;
 215
 216         gl_debug (DEBUG_EDITOR, "START");
 217
 218         toggle = GL_WDGT_CHAIN_BUTTON (editor->priv->size_aspect_checkbutton);
 219
 220         if (gl_wdgt_chain_button_get_active (toggle)) {
 221
 222                 h = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 223
 224                 w = h / editor->priv->size_aspect_ratio;
 225
 226                 /* Update our sibling control, blocking recursion. */
 227                 editor->priv->stop_signals = TRUE;
 228                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), w);
 229                 editor->priv->stop_signals = FALSE;
 230         }
 231
 232         /* Emit our "changed" signal */
 233         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 234         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[SIZE_CHANGED], 0);
 235
 236         gl_debug (DEBUG_EDITOR, "END");
 237 }
 238
 239
 240 /*--------------------------------------------------------------------------*/
 241 /* PRIVATE.  Reset image size callback.                                     */
 242 /*--------------------------------------------------------------------------*/
 243 static void
 244 size_reset_cb (glObjectEditor *editor)
 245 {
 246         gdouble w_base, h_base;
 247         gdouble w_max, h_max, wh_max;
 248         gdouble aspect_ratio;
 249
 250         if (editor->priv->stop_signals) return;
 251
 252         gl_debug (DEBUG_EDITOR, "START");
 253
 254         editor->priv->stop_signals = TRUE;
 255
 256         w_base = editor->priv->w_base;
 257         h_base = editor->priv->h_base;
 258
 259         w_max = editor->priv->w_max;
 260         h_max = editor->priv->h_max;
 261         wh_max = MAX( w_max, h_max );
 262
 263         if ( (w_base > wh_max) || (h_base > wh_max) ) {
 264
 265                 aspect_ratio = h_base / w_base;
 266
 267                 if ( aspect_ratio < 1.0 ) {
 268                         w_base = wh_max;
 269                         h_base = wh_max * aspect_ratio;
 270
 271                 } else {
 272                         w_base = wh_max / aspect_ratio;
 273                         h_base = wh_max;
 274                 }
 275         }
 276
 277         w_base *= editor->priv->units_per_point;
 278         h_base *= editor->priv->units_per_point;
 279
 280         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin),
 281                                    w_base);
 282         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin),
 283                                    h_base);
 284
 285         /* Emit our "changed" signal */
 286         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[CHANGED], 0);
 287         g_signal_emit (G_OBJECT (editor), gl_object_editor_signals[SIZE_CHANGED], 0);
 288
 289         editor->priv->stop_signals = FALSE;
 290
 291         gl_debug (DEBUG_EDITOR, "END");
 292 }
 293
 294
 295 /*****************************************************************************/
 296 /* Set size.                                                                 */
 297 /*****************************************************************************/
 298 void
 299 gl_object_editor_set_size (glObjectEditor      *editor,
 300                              gdouble                w,
 301                              gdouble                h)
 302 {
 303         gl_debug (DEBUG_EDITOR, "START");
 304
 305         editor->priv->stop_signals = TRUE;
 306
 307         /* save a copy in internal units */
 308         editor->priv->w = w;
 309         editor->priv->h = h;
 310
 311         /* convert internal units to displayed units */
 312         gl_debug (DEBUG_EDITOR, "internal w,h = %g, %g", w, h);
 313         w *= editor->priv->units_per_point;
 314         h *= editor->priv->units_per_point;
 315         gl_debug (DEBUG_EDITOR, "display w,h = %g, %g", w, h);
 316
 317         /* Set widget values */
 318         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), w);
 319         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), h);
 320
 321         /* Update aspect ratio */
 322         editor->priv->size_aspect_ratio = h / w;
 323
 324         editor->priv->stop_signals = FALSE;
 325
 326         gl_debug (DEBUG_EDITOR, "END");
 327 }
 328
 329
 330 /*****************************************************************************/
 331 /* Set maximum size.                                                         */
 332 /*****************************************************************************/
 333 void
 334 gl_object_editor_set_max_size (glObjectEditor      *editor,
 335                                gdouble              w_max,
 336                                gdouble              h_max)
 337 {
 338         gdouble tmp;
 339         gdouble wh_max;
 340
 341         gl_debug (DEBUG_EDITOR, "START");
 342
 343         if (editor->priv->size_page_vbox)
 344         {
 345
 346                 editor->priv->stop_signals = TRUE;
 347
 348                 /* save a copy in internal units */
 349                 editor->priv->w_max = w_max;
 350                 editor->priv->h_max = h_max;
 351
 352                 /* convert internal units to displayed units */
 353                 gl_debug (DEBUG_EDITOR, "internal w_max,h_max = %g, %g", w_max, h_max);
 354                 w_max *= editor->priv->units_per_point;
 355                 h_max *= editor->priv->units_per_point;
 356                 wh_max = MAX( w_max, h_max );
 357                 gl_debug (DEBUG_EDITOR, "display w_max,h_max = %g, %g", w_max, h_max);
 358
 359                 /* Set widget values */
 360                 tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 361                 gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->size_w_spin),
 362                                            0.0, 2.0*wh_max);
 363                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin), tmp);
 364                 tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 365                 gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->size_h_spin),
 366                                            0.0, 2.0*wh_max);
 367                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin), tmp);
 368
 369                 editor->priv->stop_signals = FALSE;
 370
 371         }
 372
 373         gl_debug (DEBUG_EDITOR, "END");
 374 }
 375
 376
 377 /*****************************************************************************/
 378 /* Set base or natural size of image.                                        */
 379 /*****************************************************************************/
 380 void
 381 gl_object_editor_set_base_size    (glObjectEditor      *editor,
 382                                    gdouble              w_base,
 383                                    gdouble              h_base)
 384 {
 385         gl_debug (DEBUG_EDITOR, "Setting w_base = %g", w_base);
 386         gl_debug (DEBUG_EDITOR, "Setting h_base = %g", h_base);
 387
 388         editor->priv->w_base = w_base;
 389         editor->priv->h_base = h_base;
 390 }
 391
 392
 393 /*****************************************************************************/
 394 /* Query size.                                                               */
 395 /*****************************************************************************/
 396 void
 397 gl_object_editor_get_size (glObjectEditor      *editor,
 398                            gdouble             *w,
 399                            gdouble             *h)
 400 {
 401         gl_debug (DEBUG_EDITOR, "START");
 402
 403
 404         /* Get values from widgets */
 405         *w = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_w_spin));
 406         *h = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->size_h_spin));
 407
 408         /* convert everything back to our internal units (points) */
 409         *w /= editor->priv->units_per_point;
 410         *h /= editor->priv->units_per_point;
 411
 412         /* save a copy in internal units */
 413         editor->priv->w = *w;
 414         editor->priv->h = *h;
 415
 416         gl_debug (DEBUG_EDITOR, "END");
 417 }
 418
 419
 420 /*****************************************************************************/
 421 /* PRIVATE. Prefs changed callback.  Update units related items.            */
 422 /*****************************************************************************/
 423 void
 424 size_prefs_changed_cb (glObjectEditor *editor)
 425 {
 426         const gchar  *units_string;
 427         gdouble       climb_rate;
 428         gint          digits;
 429
 430         gl_debug (DEBUG_EDITOR, "START");
 431
 432         /* Get new configuration information */
 433         units_string = gl_prefs_get_units_string ();
 434         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
 435         climb_rate = gl_prefs_get_units_step_size ();
 436         digits = gl_prefs_get_units_precision ();
 437
 438         /* Update characteristics of w_spin/h_spin */
 439         editor->priv->stop_signals = TRUE;
 440         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 441                                     digits);
 442         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 443                                     digits);
 444         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_w_spin),
 445                                         climb_rate, 10.0*climb_rate);
 446         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->size_h_spin),
 447                                         climb_rate, 10.0*climb_rate);
 448         editor->priv->stop_signals = FALSE;
 449
 450         /* Update units_labels */
 451         gtk_label_set_text (GTK_LABEL(editor->priv->size_w_units_label),
 452                             units_string);
 453         gtk_label_set_text (GTK_LABEL(editor->priv->size_h_units_label),
 454                             units_string);
 455
 456         /* Update values of w_spin/h_spin */
 457         gl_object_editor_set_size (editor,
 458                                    editor->priv->w,
 459                                    editor->priv->h);
 460         gl_object_editor_set_max_size (editor,
 461                                        editor->priv->w_max,
 462                                        editor->priv->h_max);
 463
 464         gl_debug (DEBUG_EDITOR, "END");
 465 }
 466
 467
 468
 469 /*
 470  * Local Variables:       -- emacs
 471  * mode: C                -- emacs
 472  * c-basic-offset: 8      -- emacs
 473  * tab-width: 8           -- emacs
 474  * indent-tabs-mode: nil  -- emacs
 475  * End:                   -- emacs
 476  */