src/vikaggregatelayer.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "viking.h"
  23 #include "vikaggregatelayer_pixmap.h"
  24
  25 #include <string.h>
  26
  27 #define DISCONNECT_UPDATE_SIGNAL(vl, val) g_signal_handlers_disconnect_matched(vl, G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, val)
  28
  29 static void aggregate_layer_marshall( VikAggregateLayer *val, guint8 **data, gint *len );
  30 static VikAggregateLayer *aggregate_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
  31 static void aggregate_layer_change_coord_mode ( VikAggregateLayer *val, VikCoordMode mode );
  32 static void aggregate_layer_drag_drop_request ( VikAggregateLayer *val_src, VikAggregateLayer *val_dest, GtkTreeIter *src_item_iter, GtkTreePath *dest_path );
  33
  34 VikLayerInterface vik_aggregate_layer_interface = {
  35   "Aggregate",
  36   &aggregatelayer_pixbuf,
  37
  38   NULL,
  39   0,
  40
  41   NULL,
  42   0,
  43   NULL,
  44   0,
  45
  46   VIK_MENU_ITEM_ALL,
  47
  48   (VikLayerFuncCreate)                  vik_aggregate_layer_create,
  49   (VikLayerFuncRealize)                 vik_aggregate_layer_realize,
  50   (VikLayerFuncPostRead)                NULL,
  51   (VikLayerFuncFree)                    vik_aggregate_layer_free,
  52
  53   (VikLayerFuncProperties)              NULL,
  54   (VikLayerFuncDraw)                    vik_aggregate_layer_draw,
  55   (VikLayerFuncChangeCoordMode)         aggregate_layer_change_coord_mode,
  56
  57   (VikLayerFuncSetMenuItemsSelection)   NULL,
  58   (VikLayerFuncGetMenuItemsSelection)   NULL,
  59
  60   (VikLayerFuncAddMenuItems)            NULL,
  61   (VikLayerFuncSublayerAddMenuItems)    NULL,
  62
  63   (VikLayerFuncSublayerRenameRequest)   NULL,
  64   (VikLayerFuncSublayerToggleVisible)   NULL,
  65
  66   (VikLayerFuncMarshall)                aggregate_layer_marshall,
  67   (VikLayerFuncUnmarshall)              aggregate_layer_unmarshall,
  68
  69   (VikLayerFuncSetParam)                NULL,
  70   (VikLayerFuncGetParam)                NULL,
  71
  72   (VikLayerFuncReadFileData)            NULL,
  73   (VikLayerFuncWriteFileData)           NULL,
  74
  75   (VikLayerFuncDeleteItem)              NULL,
  76   (VikLayerFuncCopyItem)                NULL,
  77   (VikLayerFuncPasteItem)               NULL,
  78   (VikLayerFuncFreeCopiedItem)          NULL,
  79   (VikLayerFuncDragDropRequest)         aggregate_layer_drag_drop_request,
  80 };
  81
  82 struct _VikAggregateLayer {
  83   VikLayer vl;
  84   GList *children;
  85 };
  86
  87 GType vik_aggregate_layer_get_type ()
  88 {
  89   static GType val_type = 0;
  90
  91   if (!val_type)
  92   {
  93     static const GTypeInfo val_info =
  94     {
  95       sizeof (VikAggregateLayerClass),
  96       NULL, /* base_init */
  97       NULL, /* base_finalize */
  98       NULL, /* class init */
  99       NULL, /* class_finalize */
 100       NULL, /* class_data */
 101       sizeof (VikAggregateLayer),
 102       0,
 103       NULL /* instance init */
 104     };
 105     val_type = g_type_register_static ( VIK_LAYER_TYPE, "VikAggregateLayer", &val_info, 0 );
 106   }
 107
 108   return val_type;
 109 }
 110
 111 VikAggregateLayer *vik_aggregate_layer_create (VikViewport *vp)
 112 {
 113   VikAggregateLayer *rv = vik_aggregate_layer_new ();
 114   vik_layer_rename ( VIK_LAYER(rv), vik_aggregate_layer_interface.name );
 115   return rv;
 116 }
 117
 118 static void aggregate_layer_marshall( VikAggregateLayer *val, guint8 **data, gint *datalen )
 119 {
 120   GList *child = val->children;
 121   VikLayer *child_layer;
 122   guint8 *ld;
 123   gint ll;
 124   GByteArray* b = g_byte_array_new ();
 125   gint len;
 126
 127 #define alm_append(obj, sz)     \
 128   len = (sz);                   \
 129   g_byte_array_append ( b, (guint8 *)&len, sizeof(len) );       \
 130   g_byte_array_append ( b, (guint8 *)(obj), len );
 131
 132   vik_layer_marshall_params(VIK_LAYER(val), &ld, &ll);
 133   alm_append(ld, ll);
 134   g_free(ld);
 135
 136   while (child) {
 137     child_layer = VIK_LAYER(child->data);
 138     vik_layer_marshall ( child_layer, &ld, &ll );
 139     if (ld) {
 140       alm_append(ld, ll);
 141       g_free(ld);
 142     }
 143     child = child->next;
 144   }
 145   *data = b->data;
 146   *datalen = b->len;
 147   g_byte_array_free(b, FALSE);
 148 #undef alm_append
 149 }
 150
 151 static VikAggregateLayer *aggregate_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
 152 {
 153 #define alm_size (*(gint *)data)
 154 #define alm_next \
 155   len -= sizeof(gint) + alm_size; \
 156   data += sizeof(gint) + alm_size;
 157
 158   VikAggregateLayer *rv = vik_aggregate_layer_new();
 159   VikLayer *child_layer;
 160
 161   vik_layer_unmarshall_params ( VIK_LAYER(rv), data+sizeof(gint), alm_size, vvp );
 162   alm_next;
 163
 164   while (len>0) {
 165     child_layer = vik_layer_unmarshall ( data + sizeof(gint), alm_size, vvp );
 166     if (child_layer) {
 167       rv->children = g_list_append ( rv->children, child_layer );
 168       g_signal_connect_swapped ( G_OBJECT(child_layer), "update", G_CALLBACK(vik_layer_emit_update_secondary), rv );
 169     }
 170     alm_next;
 171   }
 172   //  g_print("aggregate_layer_unmarshall ended with len=%d\n", len);
 173   return rv;
 174 #undef alm_size
 175 #undef alm_next
 176 }
 177
 178 VikAggregateLayer *vik_aggregate_layer_new ()
 179 {
 180   VikAggregateLayer *val = VIK_AGGREGATE_LAYER ( g_object_new ( VIK_AGGREGATE_LAYER_TYPE, NULL ) );
 181   vik_layer_init ( VIK_LAYER(val), VIK_LAYER_AGGREGATE );
 182   val->children = NULL;
 183   return val;
 184 }
 185
 186 void vik_aggregate_layer_insert_layer ( VikAggregateLayer *val, VikLayer *l, GtkTreeIter *replace_iter )
 187 {
 188   GtkTreeIter iter;
 189
 190   if ( VIK_LAYER(val)->realized )
 191   {
 192     vik_treeview_insert_layer ( VIK_LAYER(val)->vt, &(VIK_LAYER(val)->iter), &iter, l->name, val, l, l->type, l->type, replace_iter );
 193     if ( ! l->visible )
 194       vik_treeview_item_set_visible ( VIK_LAYER(val)->vt, &iter, FALSE );
 195     vik_layer_realize ( l, VIK_LAYER(val)->vt, &iter );
 196
 197     if ( val->children == NULL )
 198       vik_treeview_expand ( VIK_LAYER(val)->vt, &(VIK_LAYER(val)->iter) );
 199   }
 200
 201   if (replace_iter) {
 202     GList *theone = g_list_find ( val->children, vik_treeview_item_get_pointer ( VIK_LAYER(val)->vt, replace_iter ) );
 203     val->children = g_list_insert ( val->children, l, g_list_position(val->children,theone)+1 );
 204   } else {
 205     val->children = g_list_append ( val->children, l );
 206   }
 207   g_signal_connect_swapped ( G_OBJECT(l), "update", G_CALLBACK(vik_layer_emit_update_secondary), val );
 208 }
 209
 210 void vik_aggregate_layer_add_layer ( VikAggregateLayer *val, VikLayer *l )
 211 {
 212   GtkTreeIter iter;
 213
 214   if ( VIK_LAYER(val)->realized )
 215   {
 216     vik_treeview_add_layer ( VIK_LAYER(val)->vt, &(VIK_LAYER(val)->iter), &iter, l->name, val, l, l->type, l->type);
 217     if ( ! l->visible )
 218       vik_treeview_item_set_visible ( VIK_LAYER(val)->vt, &iter, FALSE );
 219     vik_layer_realize ( l, VIK_LAYER(val)->vt, &iter );
 220
 221     if ( val->children == NULL )
 222       vik_treeview_expand ( VIK_LAYER(val)->vt, &(VIK_LAYER(val)->iter) );
 223   }
 224
 225   val->children = g_list_append ( val->children, l );
 226   g_signal_connect_swapped ( G_OBJECT(l), "update", G_CALLBACK(vik_layer_emit_update_secondary), val );
 227 }
 228
 229 void vik_aggregate_layer_move_layer ( VikAggregateLayer *val, GtkTreeIter *child_iter, gboolean up )
 230 {
 231   GList *theone, *first, *second;
 232   vik_treeview_move_item ( VIK_LAYER(val)->vt, child_iter, up );
 233
 234   theone = g_list_find ( val->children, vik_treeview_item_get_pointer ( VIK_LAYER(val)->vt, child_iter ) );
 235
 236   g_assert ( theone != NULL );
 237
 238   /* the old switcheroo */
 239   if ( up && theone->next )
 240   {
 241     first = theone;
 242     second = theone->next;
 243   }
 244   else if ( !up && theone->prev )
 245   {
 246     first = theone->prev;
 247     second = theone;
 248   }
 249   else
 250     return;
 251
 252   first->next = second->next;
 253   second->prev = first->prev;
 254   first->prev = second;
 255   second->next = first;
 256
 257   /* second is now first */
 258
 259   if ( second->prev )
 260     second->prev->next = second;
 261   if ( first->next )
 262     first->next->prev = first;
 263
 264   if ( second->prev == NULL )
 265     val->children = second;
 266 }
 267
 268 /* Draw the aggregate layer. If vik viewport is in half_drawn mode, this means we are only
 269  * to draw the layers above and including the trigger layer.
 270  * To do this we don't draw any layers if in half drawn mode, unless we find the
 271  * trigger layer, in which case we pull up the saved pixmap, turn off half drawn mode and
 272  * start drawing layers.
 273  * Also, if we were never in half drawn mode, we save a snapshot
 274  * of the pixmap before drawing the trigger layer so we can use it again
 275  * later.
 276  */
 277 void vik_aggregate_layer_draw ( VikAggregateLayer *val, gpointer data )
 278 {
 279   GList *iter = val->children;
 280   VikLayer *vl;
 281   VikLayer *trigger = VIK_LAYER(vik_viewport_get_trigger( VIK_VIEWPORT(data) ));
 282   while ( iter ) {
 283     vl = VIK_LAYER(iter->data);
 284     if ( vl == trigger ) {
 285       if ( vik_viewport_get_half_drawn ( VIK_VIEWPORT(data) ) ) {
 286         vik_viewport_set_half_drawn ( VIK_VIEWPORT(data), FALSE );
 287         vik_viewport_snapshot_load( VIK_VIEWPORT(data) );
 288       } else {
 289         vik_viewport_snapshot_save( VIK_VIEWPORT(data) );
 290       }
 291     }
 292     if ( vl->type == VIK_LAYER_AGGREGATE || vl->type == VIK_LAYER_GPS || ! vik_viewport_get_half_drawn( VIK_VIEWPORT(data) ) )
 293       vik_layer_draw ( vl, data );
 294     iter = iter->next;
 295   }
 296 }
 297
 298 static void aggregate_layer_change_coord_mode ( VikAggregateLayer *val, VikCoordMode mode )
 299 {
 300   GList *iter = val->children;
 301   while ( iter )
 302   {
 303     vik_layer_change_coord_mode ( VIK_LAYER(iter->data), mode );
 304     iter = iter->next;
 305   }
 306 }
 307
 308 static void disconnect_layer_signal ( VikLayer *vl, VikAggregateLayer *val )
 309 {
 310   g_assert(DISCONNECT_UPDATE_SIGNAL(vl,val)==1);
 311 }
 312
 313 void vik_aggregate_layer_free ( VikAggregateLayer *val )
 314 {
 315   g_list_foreach ( val->children, (GFunc)(disconnect_layer_signal), val );
 316   g_list_foreach ( val->children, (GFunc)(g_object_unref), NULL );
 317   g_list_free ( val->children );
 318 }
 319
 320 static void delete_layer_iter ( VikLayer *vl )
 321 {
 322   if ( vl->realized )
 323     vik_treeview_item_delete ( vl->vt, &(vl->iter) );
 324 }
 325
 326 void vik_aggregate_layer_clear ( VikAggregateLayer *val )
 327 {
 328   g_list_foreach ( val->children, (GFunc)(disconnect_layer_signal), val );
 329   g_list_foreach ( val->children, (GFunc)(delete_layer_iter), NULL );
 330   g_list_foreach ( val->children, (GFunc)(g_object_unref), NULL );
 331   g_list_free ( val->children );
 332   val->children = NULL;
 333 }
 334
 335 gboolean vik_aggregate_layer_delete ( VikAggregateLayer *val, GtkTreeIter *iter )
 336 {
 337   VikLayer *l = VIK_LAYER( vik_treeview_item_get_pointer ( VIK_LAYER(val)->vt, iter ) );
 338   gboolean was_visible = l->visible;
 339
 340   vik_treeview_item_delete ( VIK_LAYER(val)->vt, iter );
 341   val->children = g_list_remove ( val->children, l );
 342   g_assert(DISCONNECT_UPDATE_SIGNAL(l,val)==1);
 343   g_object_unref ( l );
 344
 345   return was_visible;
 346 }
 347
 348 #if 0
 349 /* returns 0 == we're good, 1 == didn't find any layers, 2 == got rejected */
 350 guint vik_aggregate_layer_tool ( VikAggregateLayer *val, guint16 layer_type, VikToolInterfaceFunc tool_func, GdkEventButton *event, VikViewport *vvp )
 351 {
 352   GList *iter = val->children;
 353   gboolean found_rej = FALSE;
 354   if (!iter)
 355     return FALSE;
 356   while (iter->next)
 357     iter = iter->next;
 358
 359   while ( iter )
 360   {
 361     /* if this layer "accepts" the tool call */
 362     if ( VIK_LAYER(iter->data)->visible && VIK_LAYER(iter->data)->type == layer_type )
 363     {
 364       if ( tool_func ( VIK_LAYER(iter->data), event, vvp ) )
 365         return 0;
 366       else
 367         found_rej = TRUE;
 368     }
 369
 370     /* recursive -- try the same for the child aggregate layer. */
 371     else if ( VIK_LAYER(iter->data)->visible && VIK_LAYER(iter->data)->type == VIK_LAYER_AGGREGATE )
 372     {
 373       gint rv = vik_aggregate_layer_tool(VIK_AGGREGATE_LAYER(iter->data), layer_type, tool_func, event, vvp);
 374       if ( rv == 0 )
 375         return 0;
 376       else if ( rv == 2 )
 377         found_rej = TRUE;
 378     }
 379     iter = iter->prev;
 380   }
 381   return found_rej ? 2 : 1; /* no one wanted to accept the tool call in this layer */
 382 }
 383 #endif
 384
 385 VikLayer *vik_aggregate_layer_get_top_visible_layer_of_type ( VikAggregateLayer *val, gint type )
 386 {
 387   VikLayer *rv;
 388   GList *ls = val->children;
 389   if (!ls)
 390     return NULL;
 391   while (ls->next)
 392     ls = ls->next;
 393
 394   while ( ls )
 395   {
 396     if ( VIK_LAYER(ls->data)->visible && VIK_LAYER(ls->data)->type == type )
 397       return VIK_LAYER(ls->data);
 398     else if ( VIK_LAYER(ls->data)->visible && VIK_LAYER(ls->data)->type == VIK_LAYER_AGGREGATE )
 399     {
 400       rv = vik_aggregate_layer_get_top_visible_layer_of_type(VIK_AGGREGATE_LAYER(ls->data), type);
 401       if ( rv )
 402         return rv;
 403     }
 404     ls = ls->prev;
 405   }
 406   return NULL;
 407 }
 408
 409 GList *vik_aggregate_layer_get_all_layers_of_type(VikAggregateLayer *val, GList *layers, gint type)
 410 {
 411   GList *l = layers;
 412   GList *children = val->children;
 413   if (!children)
 414     return layers;
 415   while (children) {
 416     if (VIK_LAYER(children->data)->type == VIK_LAYER_AGGREGATE)
 417       l = vik_aggregate_layer_get_all_layers_of_type(VIK_AGGREGATE_LAYER(children->data), l, type);
 418     else if (VIK_LAYER(children->data)->type == type)
 419       l = g_list_prepend(l, children->data); /* now in top down order */
 420     children = children->next;
 421   }
 422   return l;
 423 }
 424
 425 void vik_aggregate_layer_realize ( VikAggregateLayer *val, VikTreeview *vt, GtkTreeIter *layer_iter )
 426 {
 427   GList *i = val->children;
 428   GtkTreeIter iter;
 429   while ( i )
 430   {
 431     vik_treeview_add_layer ( VIK_LAYER(val)->vt, layer_iter, &iter, VIK_LAYER(i->data)->name, val,
 432         VIK_LAYER(i->data), VIK_LAYER(i->data)->type, VIK_LAYER(i->data)->type );
 433     if ( ! VIK_LAYER(i->data)->visible )
 434       vik_treeview_item_set_visible ( VIK_LAYER(val)->vt, &iter, FALSE );
 435     vik_layer_realize ( VIK_LAYER(i->data), VIK_LAYER(val)->vt, &iter );
 436     i = i->next;
 437   }
 438 }
 439
 440 const GList *vik_aggregate_layer_get_children ( VikAggregateLayer *val )
 441 {
 442   return val->children;
 443 }
 444
 445 gboolean vik_aggregate_layer_is_empty ( VikAggregateLayer *val )
 446 {
 447   if ( val->children )
 448     return FALSE;
 449   return TRUE;
 450 }
 451
 452 static void aggregate_layer_drag_drop_request ( VikAggregateLayer *val_src, VikAggregateLayer *val_dest, GtkTreeIter *src_item_iter, GtkTreePath *dest_path )
 453 {
 454   VikTreeview *vt = VIK_LAYER(val_src)->vt;
 455   VikLayer *vl = vik_treeview_item_get_pointer(vt, src_item_iter);
 456   GtkTreeIter dest_iter;
 457   gchar *dp;
 458   gboolean target_exists;
 459
 460   dp = gtk_tree_path_to_string(dest_path);
 461   target_exists = vik_treeview_get_iter_from_path_str(vt, &dest_iter, dp);
 462
 463   /* vik_aggregate_layer_delete unrefs, but we don't want that here.
 464    * we're still using the layer. */
 465   g_object_ref ( vl );
 466   vik_aggregate_layer_delete(val_src, src_item_iter);
 467
 468   if (target_exists) {
 469     vik_aggregate_layer_insert_layer(val_dest, vl, &dest_iter);
 470   } else {
 471     vik_aggregate_layer_insert_layer(val_dest, vl, NULL); /* append */
 472   }
 473   g_free(dp);
 474 }
 475