git.sur5r.net Git - glabels/blob - glabels2/src/view-line.c

   1 /*
   2  *  (GLABELS) Label and Business Card Creation program for GNOME
   3  *
   4  *  view_line.c:  GLabels label line object widget
   5  *
   6  *  Copyright (C) 2001-2003  Jim Evins <evins@snaught.com>.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  */
  22
  23 #include <glib.h>
  24
  25 #include "view-line.h"
  26
  27 #include "view-highlight.h"
  28
  29 #include "color.h"
  30 #include "object-editor.h"
  31 #include "stock.h"
  32
  33 #include "pixmaps/cursor_line.xbm"
  34 #include "pixmaps/cursor_line_mask.xbm"
  35
  36 #include "debug.h"
  37
  38 /*========================================================*/
  39 /* Private macros and constants.                          */
  40 /*========================================================*/
  41
  42 /*========================================================*/
  43 /* Private types.                                         */
  44 /*========================================================*/
  45
  46 struct _glViewLinePrivate {
  47         GnomeCanvasItem       *item;
  48 };
  49
  50 /*========================================================*/
  51 /* Private globals.                                       */
  52 /*========================================================*/
  53
  54 static glViewObjectClass *parent_class = NULL;
  55
  56
  57 /*========================================================*/
  58 /* Private function prototypes.                           */
  59 /*========================================================*/
  60
  61 static void       gl_view_line_class_init           (glViewLineClass  *klass);
  62 static void       gl_view_line_instance_init        (glViewLine       *view_line);
  63 static void       gl_view_line_finalize             (GObject          *object);
  64
  65 static GtkWidget *construct_properties_editor       (glViewObject     *view_object);
  66
  67 static void       update_canvas_item_from_object_cb (glLabelObject    *object,
  68                                                      glViewLine        *view_line);
  69
  70 static void       update_object_from_editor_cb      (glObjectEditor   *editor,
  71                                                      glLabelObject    *object);
  72
  73 static void       update_editor_from_object_cb      (glLabelObject    *object,
  74                                                      glObjectEditor   *editor);
  75
  76 static void       update_editor_from_move_cb        (glLabelObject    *object,
  77                                                      gdouble           dx,
  78                                                      gdouble           dy,
  79                                                      glObjectEditor   *editor);
  80
  81 static void       update_editor_from_label_cb       (glLabel          *label,
  82                                                      glObjectEditor   *editor);
  83
  84
  85 \f
  86 /*****************************************************************************/
  87 /* Boilerplate object stuff.                                                 */
  88 /*****************************************************************************/
  89 GType
  90 gl_view_line_get_type (void)
  91 {
  92         static GType type = 0;
  93
  94         if (!type) {
  95                 GTypeInfo info = {
  96                         sizeof (glViewLineClass),
  97                         NULL,
  98                         NULL,
  99                         (GClassInitFunc) gl_view_line_class_init,
 100                         NULL,
 101                         NULL,
 102                         sizeof (glViewLine),
 103                         0,
 104                         (GInstanceInitFunc) gl_view_line_instance_init,
 105                 };
 106
 107                 type = g_type_register_static (GL_TYPE_VIEW_OBJECT,
 108                                                "glViewLine", &info, 0);
 109         }
 110
 111         return type;
 112 }
 113
 114 static void
 115 gl_view_line_class_init (glViewLineClass *klass)
 116 {
 117         GObjectClass      *object_class      = (GObjectClass *) klass;
 118         glViewObjectClass *view_object_class = (glViewObjectClass *) klass;
 119
 120         gl_debug (DEBUG_VIEW, "START");
 121
 122         parent_class = g_type_class_peek_parent (klass);
 123
 124         object_class->finalize = gl_view_line_finalize;
 125
 126         view_object_class->construct_editor = construct_properties_editor;
 127
 128         gl_debug (DEBUG_VIEW, "END");
 129 }
 130
 131 static void
 132 gl_view_line_instance_init (glViewLine *view_line)
 133 {
 134         gl_debug (DEBUG_VIEW, "START");
 135
 136         view_line->private = g_new0 (glViewLinePrivate, 1);
 137
 138         gl_debug (DEBUG_VIEW, "END");
 139 }
 140
 141 static void
 142 gl_view_line_finalize (GObject *object)
 143 {
 144         glLabel       *parent;
 145
 146         gl_debug (DEBUG_VIEW, "START");
 147
 148         g_return_if_fail (object && GL_IS_VIEW_LINE (object));
 149
 150         G_OBJECT_CLASS (parent_class)->finalize (object);
 151
 152         gl_debug (DEBUG_VIEW, "END");
 153 }
 154
 155 /*****************************************************************************/
 156 /* NEW line object view.                                                     */
 157 /*****************************************************************************/
 158 glViewObject *
 159 gl_view_line_new (glLabelLine *object,
 160                   glView      *view)
 161 {
 162         glViewLine        *view_line;
 163         gdouble            line_width;
 164         guint              line_color;
 165         gdouble            w, h;
 166         GnomeCanvasPoints *points;
 167
 168         gl_debug (DEBUG_VIEW, "START");
 169         g_return_if_fail (object && GL_IS_LABEL_LINE (object));
 170         g_return_if_fail (view && GL_IS_VIEW (view));
 171
 172         view_line = g_object_new (gl_view_line_get_type(), NULL);
 173
 174         gl_view_object_set_view (GL_VIEW_OBJECT(view_line), view);
 175         gl_view_object_set_object (GL_VIEW_OBJECT(view_line),
 176                                    GL_LABEL_OBJECT(object),
 177                                    GL_VIEW_HIGHLIGHT_LINE_RESIZABLE);
 178
 179         /* Query properties of object. */
 180         gl_label_object_get_size (GL_LABEL_OBJECT(object), &w, &h);
 181         line_width = gl_label_object_get_line_width(GL_LABEL_OBJECT(object));
 182         line_color = gl_label_object_get_line_color(GL_LABEL_OBJECT(object));
 183
 184         /* Create analogous canvas item. */
 185         points = gnome_canvas_points_new (2);
 186         points->coords[0] = 0.0;
 187         points->coords[1] = 0.0;
 188         points->coords[2] = w;
 189         points->coords[3] = h;
 190         view_line->private->item =
 191                 gl_view_object_item_new (GL_VIEW_OBJECT(view_line),
 192                                          gnome_canvas_line_get_type (),
 193                                          "points", points,
 194                                          "width_units", line_width,
 195                                          "fill_color_rgba", line_color,
 196                                          NULL);
 197         gnome_canvas_points_free (points);
 198
 199         g_signal_connect (G_OBJECT (object), "changed",
 200                           G_CALLBACK (update_canvas_item_from_object_cb), view_line);
 201
 202         gl_debug (DEBUG_VIEW, "END");
 203
 204         return GL_VIEW_OBJECT (view_line);
 205 }
 206
 207 /*****************************************************************************/
 208 /* Create a properties editor for a line object.                             */
 209 /*****************************************************************************/
 210 static GtkWidget *
 211 construct_properties_editor (glViewObject *view_object)
 212 {
 213         GtkWidget          *editor;
 214         glViewLine         *view_line = (glViewLine *)view_object;
 215         glLabelObject      *object;
 216
 217         gl_debug (DEBUG_VIEW, "START");
 218
 219         object = gl_view_object_get_object (GL_VIEW_OBJECT(view_line));
 220
 221         /* Build editor. */
 222         editor = gl_object_editor_new (GL_STOCK_LINE, _("Line object properties"),
 223                                        GL_OBJECT_EDITOR_POSITION_PAGE,
 224                                        GL_OBJECT_EDITOR_SIZE_LINE_PAGE,
 225                                        GL_OBJECT_EDITOR_LINE_PAGE,
 226                                        0);
 227
 228         /* Update */
 229         update_editor_from_object_cb (object, GL_OBJECT_EDITOR(editor));
 230         update_editor_from_move_cb (object, 0, 0, GL_OBJECT_EDITOR(editor));
 231         update_editor_from_label_cb (object->parent, GL_OBJECT_EDITOR(editor));
 232
 233         /* Connect signals. */
 234         g_signal_connect (G_OBJECT (editor), "changed",
 235                           G_CALLBACK(update_object_from_editor_cb), object);
 236         g_signal_connect (G_OBJECT (object), "changed",
 237                           G_CALLBACK (update_editor_from_object_cb), editor);
 238         g_signal_connect (G_OBJECT (object), "moved",
 239                           G_CALLBACK (update_editor_from_move_cb), editor);
 240         g_signal_connect (G_OBJECT (object->parent), "size_changed",
 241                           G_CALLBACK (update_editor_from_label_cb), editor);
 242
 243         gl_debug (DEBUG_VIEW, "END");
 244
 245         return editor;
 246 }
 247
 248 /*---------------------------------------------------------------------------*/
 249 /* PRIVATE. label object "changed" callback.                                 */
 250 /*---------------------------------------------------------------------------*/
 251 static void
 252 update_canvas_item_from_object_cb (glLabelObject *object,
 253                                    glViewLine     *view_line)
 254 {
 255         gdouble            line_width;
 256         guint              line_color;
 257         gdouble            w, h;
 258         GnomeCanvasPoints  *points;
 259
 260         gl_debug (DEBUG_VIEW, "START");
 261
 262         /* Query properties of object. */
 263         gl_label_object_get_size (GL_LABEL_OBJECT(object), &w, &h);
 264         line_width = gl_label_object_get_line_width(GL_LABEL_OBJECT(object));
 265         line_color = gl_label_object_get_line_color(GL_LABEL_OBJECT(object));
 266
 267         /* Adjust appearance of analogous canvas item. */
 268         points = gnome_canvas_points_new (2);
 269         points->coords[0] = 0.0;
 270         points->coords[1] = 0.0;
 271         points->coords[2] = w;
 272         points->coords[3] = h;
 273         gnome_canvas_item_set (view_line->private->item,
 274                                "points", points,
 275                                "width_units", line_width,
 276                                "fill_color_rgba", line_color,
 277                                NULL);
 278         gnome_canvas_points_free (points);
 279
 280         gl_debug (DEBUG_VIEW, "END");
 281 }
 282
 283 /*---------------------------------------------------------------------------*/
 284 /* PRIVATE.  editor "changed" callback.                                      */
 285 /*---------------------------------------------------------------------------*/
 286 static void
 287 update_object_from_editor_cb (glObjectEditor *editor,
 288                               glLabelObject  *object)
 289 {
 290         gdouble            x, y, w, h;
 291         guint              line_color;
 292         gdouble            line_width;
 293
 294         gl_debug (DEBUG_VIEW, "START");
 295
 296         g_signal_handlers_block_by_func (G_OBJECT(object),
 297                                          update_editor_from_object_cb,
 298                                          editor);
 299         g_signal_handlers_block_by_func (G_OBJECT(object),
 300                                          update_editor_from_move_cb,
 301                                          editor);
 302
 303
 304         gl_object_editor_get_position (editor, &x, &y);
 305         gl_label_object_set_position (object, x, y);
 306
 307         gl_object_editor_get_lsize (editor, &w, &h);
 308         gl_label_object_set_size (object, w, h);
 309
 310         line_color = gl_object_editor_get_line_color (editor);
 311         gl_label_object_set_line_color (object, line_color);
 312
 313         line_width = gl_object_editor_get_line_width (editor);
 314         gl_label_object_set_line_width (object, line_width);
 315
 316
 317         g_signal_handlers_unblock_by_func (G_OBJECT(object),
 318                                            update_editor_from_object_cb,
 319                                            editor);
 320         g_signal_handlers_unblock_by_func (G_OBJECT(object),
 321                                            update_editor_from_move_cb,
 322                                            editor);
 323
 324         gl_debug (DEBUG_VIEW, "END");
 325 }
 326
 327 /*---------------------------------------------------------------------------*/
 328 /* PRIVATE. label object "changed" callback.                                 */
 329 /*---------------------------------------------------------------------------*/
 330 static void
 331 update_editor_from_object_cb (glLabelObject  *object,
 332                               glObjectEditor *editor)
 333 {
 334         gdouble            w, h;
 335         guint              line_color;
 336         gdouble            line_width;
 337
 338         gl_debug (DEBUG_VIEW, "START");
 339
 340         gl_label_object_get_size (object, &w, &h);
 341         gl_object_editor_set_lsize (editor, w, h);
 342
 343         line_color = gl_label_object_get_line_color (GL_LABEL_OBJECT(object));
 344         gl_object_editor_set_line_color (editor, line_color);
 345
 346         line_width = gl_label_object_get_line_width (GL_LABEL_OBJECT(object));
 347         gl_object_editor_set_line_width (editor, line_width);
 348
 349         gl_debug (DEBUG_VIEW, "END");
 350 }
 351
 352 /*---------------------------------------------------------------------------*/
 353 /* PRIVATE. label object "moved" callback.                                   */
 354 /*---------------------------------------------------------------------------*/
 355 static void
 356 update_editor_from_move_cb (glLabelObject    *object,
 357                             gdouble           dx,
 358                             gdouble           dy,
 359                             glObjectEditor   *editor)
 360 {
 361         gdouble            x, y;
 362
 363         gl_debug (DEBUG_VIEW, "START");
 364
 365         gl_label_object_get_position (object, &x, &y);
 366         gl_object_editor_set_position (editor, x, y);
 367
 368         gl_debug (DEBUG_VIEW, "END");
 369 }
 370
 371 /*---------------------------------------------------------------------------*/
 372 /* PRIVATE. label "changed" callback.                                        */
 373 /*---------------------------------------------------------------------------*/
 374 static void
 375 update_editor_from_label_cb (glLabel        *label,
 376                              glObjectEditor *editor)
 377 {
 378         gdouble            label_width, label_height;
 379
 380         gl_debug (DEBUG_VIEW, "START");
 381
 382         gl_label_get_size (label, &label_width, &label_height);
 383         gl_object_editor_set_max_position (GL_OBJECT_EDITOR (editor),
 384                                            label_width, label_height);
 385         gl_object_editor_set_max_lsize (GL_OBJECT_EDITOR (editor),
 386                                         label_width, label_height);
 387
 388         gl_debug (DEBUG_VIEW, "END");
 389 }
 390
 391 /*****************************************************************************/
 392 /* Return apropos cursor for create object mode.                             */
 393 /*****************************************************************************/
 394 GdkCursor *
 395 gl_view_line_get_create_cursor (void)
 396 {
 397         static GdkCursor *cursor = NULL;
 398         GdkPixmap        *pixmap_data, *pixmap_mask;
 399         GdkColor         fg = { 0, 0, 0, 0 };
 400         GdkColor         bg = { 0, 65535, 65535, 65535 };
 401
 402         gl_debug (DEBUG_VIEW, "START");
 403
 404         if (!cursor) {
 405                 pixmap_data = gdk_bitmap_create_from_data (NULL,
 406                                                            cursor_line_bits,
 407                                                            cursor_line_width,
 408                                                            cursor_line_height);
 409                 pixmap_mask = gdk_bitmap_create_from_data (NULL,
 410                                                            cursor_line_mask_bits,
 411                                                            cursor_line_mask_width,
 412                                                            cursor_line_mask_height);
 413                 cursor =
 414                     gdk_cursor_new_from_pixmap (pixmap_data, pixmap_mask, &fg,
 415                                                 &bg, cursor_line_x_hot,
 416                                                 cursor_line_y_hot);
 417         }
 418
 419         gl_debug (DEBUG_VIEW, "END");
 420
 421         return cursor;
 422 }
 423
 424 /*****************************************************************************/
 425 /* Canvas event handler for creating line objects.                            */
 426 /*****************************************************************************/
 427 int
 428 gl_view_line_create_event_handler (GnomeCanvas *canvas,
 429                                    GdkEvent    *event,
 430                                    glView      *view)
 431 {
 432         static gdouble      x0, y0;
 433         static gboolean     dragging = FALSE;
 434         static glViewObject *view_line;
 435         static GObject      *object;
 436         gdouble             x, y, w, h;
 437
 438         gl_debug (DEBUG_VIEW, "");
 439
 440         switch (event->type) {
 441
 442         case GDK_BUTTON_PRESS:
 443                 switch (event->button.button) {
 444                 case 1:
 445                         dragging = TRUE;
 446                         gnome_canvas_item_grab (canvas->root,
 447                                                 GDK_POINTER_MOTION_MASK |
 448                                                 GDK_BUTTON_RELEASE_MASK |
 449                                                 GDK_BUTTON_PRESS_MASK,
 450                                                 NULL, event->button.time);
 451                         gnome_canvas_window_to_world (canvas,
 452                                                       event->button.x,
 453                                                       event->button.y, &x, &y);
 454                         object = gl_label_line_new (view->label);
 455                         gl_label_object_set_position (GL_LABEL_OBJECT(object),
 456                                                       x, y);
 457                         gl_label_object_set_size (GL_LABEL_OBJECT(object),
 458                                                   0.0, 0.0);
 459                         gl_label_object_set_line_width (GL_LABEL_OBJECT(object),
 460                                                       gl_view_get_default_line_width(view));
 461                         gl_label_object_set_line_color (GL_LABEL_OBJECT(object),
 462                                                      gl_color_set_opacity (gl_view_get_default_line_color(view), 0.5));
 463                         view_line = gl_view_line_new (GL_LABEL_LINE(object),
 464                                                       view);
 465                         x0 = x;
 466                         y0 = y;
 467                         return TRUE;
 468
 469                 default:
 470                         return FALSE;
 471                 }
 472
 473         case GDK_BUTTON_RELEASE:
 474                 switch (event->button.button) {
 475                 case 1:
 476                         dragging = FALSE;
 477                         gnome_canvas_item_ungrab (canvas->root, event->button.time);
 478                         gnome_canvas_window_to_world (canvas,
 479                                                       event->button.x,
 480                                                       event->button.y, &x, &y);
 481                         if ((x0 == x) && (y0 == y)) {
 482                                 x = x0 + 36.0;
 483                                 y = y0 + 36.0;
 484                         }
 485                         w = x - x0;
 486                         h = y - y0;
 487                         gl_label_object_set_size (GL_LABEL_OBJECT(object),
 488                                                   w, h);
 489                         gl_label_object_set_line_color (GL_LABEL_OBJECT(object),
 490                                                      gl_view_get_default_line_color(view));
 491                         gl_view_unselect_all (view);
 492                         gl_view_object_select (GL_VIEW_OBJECT(view_line));
 493                         gl_view_arrow_mode (view);
 494                         return TRUE;
 495
 496                 default:
 497                         return FALSE;
 498                 }
 499
 500         case GDK_MOTION_NOTIFY:
 501                 if (dragging && (event->motion.state & GDK_BUTTON1_MASK)) {
 502                         gnome_canvas_window_to_world (canvas,
 503                                                       event->motion.x,
 504                                                       event->motion.y, &x, &y);
 505                         w = x - x0;
 506                         h = y - y0;
 507                         gl_label_object_set_size (GL_LABEL_OBJECT(object),
 508                                                   w, h);
 509                         return TRUE;
 510                 } else {
 511                         return FALSE;
 512                 }
 513
 514         default:
 515                 return FALSE;
 516         }
 517
 518 }
 519