git.sur5r.net Git - glabels/blob - src/view-line.c

   1 /*
   2  *  view-line.c
   3  *  Copyright (C) 2001-2009  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 "view-line.h"
  24
  25 #include <glib/gi18n.h>
  26 #include <glib.h>
  27
  28 #include "color.h"
  29 #include "object-editor.h"
  30 #include "stock.h"
  31
  32 #include "pixmaps/cursor_line.xbm"
  33 #include "pixmaps/cursor_line_mask.xbm"
  34
  35 #include "debug.h"
  36
  37
  38 /*========================================================*/
  39 /* Private macros and constants.                          */
  40 /*========================================================*/
  41
  42
  43 /*========================================================*/
  44 /* Private types.                                         */
  45 /*========================================================*/
  46
  47 struct _glViewLinePrivate {
  48 };
  49
  50
  51 /*========================================================*/
  52 /* Private globals.                                       */
  53 /*========================================================*/
  54
  55
  56 /*========================================================*/
  57 /* Private function prototypes.                           */
  58 /*========================================================*/
  59
  60 static void       gl_view_line_finalize             (GObject          *object);
  61
  62 static GtkWidget *construct_properties_editor       (glViewObject     *view_object);
  63
  64 static void       update_object_from_editor_cb      (glObjectEditor   *editor,
  65                                                      glLabelObject    *object);
  66
  67 static void       update_editor_from_object_cb      (glLabelObject    *object,
  68                                                      glObjectEditor   *editor);
  69
  70 static void       update_editor_from_move_cb        (glLabelObject    *object,
  71                                                      gdouble           dx,
  72                                                      gdouble           dy,
  73                                                      glObjectEditor   *editor);
  74
  75 static gboolean   object_at                         (glViewObject     *view_object,
  76                                                      cairo_t          *cr,
  77                                                      gdouble           x,
  78                                                      gdouble           y);
  79
  80
  81 /*****************************************************************************/
  82 /* Boilerplate object stuff.                                                 */
  83 /*****************************************************************************/
  84 G_DEFINE_TYPE (glViewLine, gl_view_line, GL_TYPE_VIEW_OBJECT);
  85
  86
  87 static void
  88 gl_view_line_class_init (glViewLineClass *class)
  89 {
  90         GObjectClass      *object_class      = G_OBJECT_CLASS (class);
  91         glViewObjectClass *view_object_class = GL_VIEW_OBJECT_CLASS (class);
  92
  93         gl_debug (DEBUG_VIEW, "START");
  94
  95         gl_view_line_parent_class = g_type_class_peek_parent (class);
  96
  97         object_class->finalize = gl_view_line_finalize;
  98
  99         view_object_class->construct_editor = construct_properties_editor;
 100         view_object_class->object_at        = object_at;
 101
 102         gl_debug (DEBUG_VIEW, "END");
 103 }
 104
 105
 106 static void
 107 gl_view_line_init (glViewLine *view_line)
 108 {
 109         gl_debug (DEBUG_VIEW, "START");
 110
 111         view_line->priv = g_new0 (glViewLinePrivate, 1);
 112
 113         gl_debug (DEBUG_VIEW, "END");
 114 }
 115
 116
 117 static void
 118 gl_view_line_finalize (GObject *object)
 119 {
 120         glViewLine *view_line = GL_VIEW_LINE (object);
 121
 122         gl_debug (DEBUG_VIEW, "START");
 123
 124         g_return_if_fail (object && GL_IS_VIEW_LINE (object));
 125
 126         g_free (view_line->priv);
 127
 128         G_OBJECT_CLASS (gl_view_line_parent_class)->finalize (object);
 129
 130         gl_debug (DEBUG_VIEW, "END");
 131 }
 132
 133
 134 /*****************************************************************************/
 135 /* NEW line object view.                                                  */
 136 /*****************************************************************************/
 137 glViewObject *
 138 gl_view_line_new (glLabelLine *object,
 139                   glView     *view)
 140 {
 141         glViewLine         *view_line;
 142
 143         gl_debug (DEBUG_VIEW, "START");
 144
 145         g_return_val_if_fail (object && GL_IS_LABEL_LINE (object), NULL);
 146         g_return_val_if_fail (view && GL_IS_VIEW (view), NULL);
 147
 148         view_line = g_object_new (gl_view_line_get_type(), NULL);
 149
 150         gl_view_object_set_object (GL_VIEW_OBJECT(view_line),
 151                                    GL_LABEL_OBJECT(object),
 152                                    GL_VIEW_OBJECT_HANDLES_LINE);
 153         gl_view_object_set_view (GL_VIEW_OBJECT(view_line), view);
 154
 155         gl_debug (DEBUG_VIEW, "END");
 156
 157         return GL_VIEW_OBJECT (view_line);
 158 }
 159
 160
 161 /*****************************************************************************/
 162 /* Create a properties dialog for a line object.                             */
 163 /*****************************************************************************/
 164 static GtkWidget *
 165 construct_properties_editor (glViewObject *view_object)
 166 {
 167         GtkWidget          *editor;
 168         glViewLine         *view_line = (glViewLine *)view_object;
 169         glLabelObject      *object;
 170
 171         gl_debug (DEBUG_VIEW, "START");
 172
 173         object = gl_view_object_get_object (GL_VIEW_OBJECT(view_line));
 174
 175         /* Build editor. */
 176         editor = gl_object_editor_new (GL_STOCK_LINE, _("Line object properties"),
 177                                        object->parent,
 178                                        GL_OBJECT_EDITOR_SHADOW_PAGE,
 179                                        GL_OBJECT_EDITOR_POSITION_PAGE,
 180                                        GL_OBJECT_EDITOR_SIZE_LINE_PAGE,
 181                                        GL_OBJECT_EDITOR_LINE_PAGE,
 182                                        0);
 183
 184         /* Update */
 185         update_editor_from_object_cb (object, GL_OBJECT_EDITOR(editor));
 186         update_editor_from_move_cb (object, 0, 0, GL_OBJECT_EDITOR(editor));
 187
 188         /* Connect signals. */
 189         g_signal_connect (G_OBJECT (editor), "changed",
 190                           G_CALLBACK(update_object_from_editor_cb), object);
 191         g_signal_connect (G_OBJECT (object), "changed",
 192                           G_CALLBACK (update_editor_from_object_cb), editor);
 193         g_signal_connect (G_OBJECT (object), "moved",
 194                           G_CALLBACK (update_editor_from_move_cb), editor);
 195
 196         gl_debug (DEBUG_VIEW, "END");
 197
 198         return editor;
 199 }
 200
 201
 202 /*---------------------------------------------------------------------------*/
 203 /* PRIVATE.  editor "changed" callback.                                      */
 204 /*---------------------------------------------------------------------------*/
 205 static void
 206 update_object_from_editor_cb (glObjectEditor *editor,
 207                               glLabelObject  *object)
 208 {
 209         gdouble            x, y, w, h;
 210         glColorNode       *line_color_node;
 211         gdouble            line_width;
 212         gboolean           shadow_state;
 213         gdouble            shadow_x, shadow_y;
 214         glColorNode       *shadow_color_node;
 215         gdouble            shadow_opacity;
 216
 217
 218         gl_debug (DEBUG_VIEW, "START");
 219
 220         g_signal_handlers_block_by_func (G_OBJECT(object),
 221                                          update_editor_from_object_cb,
 222                                          editor);
 223         g_signal_handlers_block_by_func (G_OBJECT(object),
 224                                          update_editor_from_move_cb,
 225                                          editor);
 226
 227         gl_object_editor_get_position (editor, &x, &y);
 228         gl_label_object_set_position (object, x, y);
 229
 230         gl_object_editor_get_lsize (editor, &w, &h);
 231         gl_label_object_set_size (object, w, h);
 232
 233         line_color_node = gl_object_editor_get_line_color (editor);
 234         gl_label_object_set_line_color (object, line_color_node);
 235         gl_color_node_free (&line_color_node);
 236
 237         line_width = gl_object_editor_get_line_width (editor);
 238         gl_label_object_set_line_width (object, line_width);
 239
 240         shadow_state = gl_object_editor_get_shadow_state (editor);
 241         gl_label_object_set_shadow_state (object, shadow_state);
 242
 243         gl_object_editor_get_shadow_offset (editor, &shadow_x, &shadow_y);
 244         gl_label_object_set_shadow_offset (object, shadow_x, shadow_y);
 245
 246         shadow_color_node = gl_object_editor_get_shadow_color (editor);
 247         gl_label_object_set_shadow_color (object, shadow_color_node);
 248         gl_color_node_free (&shadow_color_node);
 249
 250         shadow_opacity = gl_object_editor_get_shadow_opacity (editor);
 251         gl_label_object_set_shadow_opacity (object, shadow_opacity);
 252
 253         g_signal_handlers_unblock_by_func (G_OBJECT(object),
 254                                            update_editor_from_object_cb,
 255                                            editor);
 256         g_signal_handlers_unblock_by_func (G_OBJECT(object),
 257                                            update_editor_from_move_cb,
 258                                            editor);
 259
 260         gl_debug (DEBUG_VIEW, "END");
 261 }
 262
 263
 264 /*---------------------------------------------------------------------------*/
 265 /* PRIVATE. label object "changed" callback.                                 */
 266 /*---------------------------------------------------------------------------*/
 267 static void
 268 update_editor_from_object_cb (glLabelObject  *object,
 269                               glObjectEditor *editor)
 270 {
 271         gdouble            w, h;
 272         glColorNode       *line_color_node;
 273         gdouble            line_width;
 274         gboolean           shadow_state;
 275         gdouble            shadow_x, shadow_y;
 276         glColorNode       *shadow_color_node;
 277         gdouble            shadow_opacity;
 278         glMerge           *merge;
 279
 280         gl_debug (DEBUG_VIEW, "START");
 281
 282         gl_label_object_get_size (object, &w, &h);
 283         gl_object_editor_set_lsize (editor, w, h);
 284         merge = gl_label_get_merge (GL_LABEL(object->parent));
 285
 286         line_color_node = gl_label_object_get_line_color (GL_LABEL_OBJECT(object));
 287         gl_object_editor_set_line_color (editor, (merge != NULL), line_color_node);
 288         gl_color_node_free (&line_color_node);
 289
 290         line_width = gl_label_object_get_line_width (GL_LABEL_OBJECT(object));
 291         gl_object_editor_set_line_width (editor, line_width);
 292
 293         shadow_state = gl_label_object_get_shadow_state (object);
 294         gl_object_editor_set_shadow_state (editor, shadow_state);
 295
 296         gl_label_object_get_shadow_offset (object, &shadow_x, &shadow_y);
 297         gl_object_editor_set_shadow_offset (editor, shadow_x, shadow_y);
 298
 299         shadow_color_node = gl_label_object_get_shadow_color (object);
 300         gl_object_editor_set_shadow_color (editor, (merge != NULL), shadow_color_node);
 301         gl_color_node_free (&shadow_color_node);
 302
 303         shadow_opacity = gl_label_object_get_shadow_opacity (object);
 304         gl_object_editor_set_shadow_opacity (editor, shadow_opacity);
 305
 306         gl_debug (DEBUG_VIEW, "END");
 307 }
 308
 309
 310 /*---------------------------------------------------------------------------*/
 311 /* PRIVATE. label object "moved" callback.                                   */
 312 /*---------------------------------------------------------------------------*/
 313 static void
 314 update_editor_from_move_cb (glLabelObject    *object,
 315                             gdouble           dx,
 316                             gdouble           dy,
 317                             glObjectEditor   *editor)
 318 {
 319         gdouble            x, y;
 320
 321         gl_debug (DEBUG_VIEW, "START");
 322
 323         gl_label_object_get_position (object, &x, &y);
 324         gl_object_editor_set_position (editor, x, y);
 325
 326         gl_debug (DEBUG_VIEW, "END");
 327 }
 328
 329
 330 /*****************************************************************************/
 331 /* Is object at (x,y)?                                                       */
 332 /*****************************************************************************/
 333 static gboolean
 334 object_at (glViewObject  *view_object,
 335            cairo_t       *cr,
 336            gdouble        x,
 337            gdouble        y)
 338 {
 339         glLabelObject    *object;
 340         gdouble           w, h;
 341         gdouble           line_width;
 342
 343         object = gl_view_object_get_object (view_object);
 344
 345         gl_label_object_get_size (object, &w, &h);
 346
 347         cairo_move_to (cr, 0.0, 0.0);
 348         cairo_line_to (cr, w, h);
 349
 350         line_width = gl_label_object_get_line_width (object);
 351         cairo_set_line_width (cr, line_width);
 352         if (cairo_in_stroke (cr, x, y))
 353         {
 354                 return TRUE;
 355         }
 356
 357         return FALSE;
 358 }
 359
 360
 361 /*****************************************************************************/
 362 /* Return apropos cursor for create object mode.                             */
 363 /*****************************************************************************/
 364 GdkCursor *
 365 gl_view_line_get_create_cursor (void)
 366 {
 367         GdkCursor       *cursor = NULL;
 368         GdkPixmap       *pixmap_data, *pixmap_mask;
 369         GdkColor         fg = { 0, 0, 0, 0 };
 370         GdkColor         bg = { 0, 65535, 65535, 65535 };
 371
 372         gl_debug (DEBUG_VIEW, "START");
 373
 374         pixmap_data = gdk_bitmap_create_from_data (NULL,
 375                                                    (gchar *)cursor_line_bits,
 376                                                    cursor_line_width,
 377                                                    cursor_line_height);
 378         pixmap_mask = gdk_bitmap_create_from_data (NULL,
 379                                                    (gchar *)cursor_line_mask_bits,
 380                                                    cursor_line_mask_width,
 381                                                    cursor_line_mask_height);
 382         cursor = gdk_cursor_new_from_pixmap (pixmap_data, pixmap_mask, &fg,
 383                                              &bg, cursor_line_x_hot,
 384                                              cursor_line_y_hot);
 385
 386         gl_debug (DEBUG_VIEW, "END");
 387
 388         return cursor;
 389 }
 390
 391
 392 /*****************************************************************************/
 393 /* Object creation handler: button press event.                              */
 394 /*****************************************************************************/
 395 void
 396 gl_view_line_create_button_press_event   (glView *view,
 397                                           gdouble x,
 398                                           gdouble y)
 399 {
 400         GObject             *object;
 401         glColorNode         *line_color_node;
 402
 403         gl_view_unselect_all (view);
 404
 405         line_color_node = gl_color_node_new_default ();
 406
 407         object = gl_label_line_new (view->label);
 408         gl_label_object_set_position (GL_LABEL_OBJECT(object), x, y);
 409         gl_label_object_set_size (GL_LABEL_OBJECT(object), 0.0, 0.0);
 410         line_color_node->color = gl_color_set_opacity (gl_view_get_default_line_color(view), 0.5);
 411         gl_label_object_set_line_width (GL_LABEL_OBJECT(object),
 412                                         gl_view_get_default_line_width(view));
 413         gl_label_object_set_line_color (GL_LABEL_OBJECT(object),
 414                                         line_color_node);
 415
 416         gl_color_node_free (&line_color_node);
 417
 418         view->create_object = GL_LABEL_OBJECT (object);
 419         view->create_x0 = x;
 420         view->create_y0 = y;
 421 }
 422
 423
 424 /*****************************************************************************/
 425 /* Object creation handler: motion event.                                    */
 426 /*****************************************************************************/
 427 void
 428 gl_view_line_create_motion_event     (glView *view,
 429                                       gdouble x,
 430                                       gdouble y)
 431 {
 432         gdouble w, h;
 433
 434         w = x - view->create_x0;
 435         h = y - view->create_y0;
 436         gl_label_object_set_size (GL_LABEL_OBJECT(view->create_object), w, h);
 437 }
 438
 439
 440 /*****************************************************************************/
 441 /* Object creation handler: button relesase event.                           */
 442 /*****************************************************************************/
 443 void
 444 gl_view_line_create_button_release_event (glView *view,
 445                                           gdouble x,
 446                                           gdouble y)
 447 {
 448         glColorNode         *line_color_node;
 449         gdouble              w, h;
 450
 451         line_color_node = gl_color_node_new_default ();
 452
 453         if ((view->create_x0 == x) && (view->create_y0 == y)) {
 454                 x = view->create_x0 + 36.0;
 455                 y = view->create_y0 + 36.0;
 456         }
 457         w = x - view->create_x0;
 458         h = y - view->create_y0;
 459         gl_label_object_set_size (GL_LABEL_OBJECT(view->create_object), w, h);
 460         line_color_node->color = gl_view_get_default_line_color(view);
 461         gl_label_object_set_line_color (GL_LABEL_OBJECT(view->create_object), line_color_node);
 462         gl_color_node_free (&line_color_node);
 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  */