COIN-OR::LEMON - Graph Library

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source: lemon-0.x/gui/graph_displayer_canvas-event.cc @ 1725:22752dd6c693

Last change on this file since 1725:22752dd6c693 was 1654:0917756ba533, checked in by Akos Ladanyi, 19 years ago
placement of the coordinates caption now takes into account the node radius
Property exe set to ``*
File size: 24.0 KB

Line
1	#include "graph_displayer_canvas.h"
2	#include "broken_edge.h"
3	#include <cmath>
4
5
6	bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event)
7	{
8	Gnome::Canvas::CanvasAA::on_expose_event(event);
9	//usleep(10000);
10	//rezoom();
11	return true;
12	}
13
14	void GraphDisplayerCanvas::changeEditorialTool(int newtool)
15	{
16	if(actual_tool!=newtool)
17	{
18
19	actual_handler.disconnect();
20
21	switch(actual_tool)
22	{
23	case CREATE_EDGE:
24	{
25	GdkEvent * generated=new GdkEvent();
26	generated->type=GDK_BUTTON_RELEASE;
27	generated->button.button=3;
28	createEdgeEventHandler(generated);
29	break;
30	}
31	case EDGE_MAP_EDIT:
32	//has to do the same thing as in the case of NODE_MAP_EDIT
33	case NODE_MAP_EDIT:
34	{
35	break;
36	}
37	default:
38	break;
39	}
40
41	active_item=NULL;
42	target_item=NULL;
43	active_edge=INVALID;
44	active_node=INVALID;
45
46
47	actual_tool=newtool;
48
49	switch(newtool)
50	{
51	case MOVE:
52	actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::moveEventHandler), false);
53	break;
54
55	case CREATE_NODE:
56	actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::createNodeEventHandler), false);
57	break;
58
59	case CREATE_EDGE:
60	actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::createEdgeEventHandler), false);
61	break;
62
63	case ERASER:
64	actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraserEventHandler), false);
65	break;
66
67	case EDGE_MAP_EDIT:
68	grab_focus();
69	actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::edgeMapEditEventHandler), false);
70	break;
71
72	case NODE_MAP_EDIT:
73	actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::nodeMapEditEventHandler), false);
74	break;
75
76	default:
77	break;
78	}
79	}
80	}
81
82	int GraphDisplayerCanvas::getActualTool()
83	{
84	return actual_tool;
85	}
86
87	bool GraphDisplayerCanvas::moveEventHandler(GdkEvent* e)
88	{
89	static Gnome::Canvas::Text *coord_text = 0;
90	switch(e->type)
91	{
92	case GDK_BUTTON_PRESS:
93	//we mark the location of the event to be able to calculate parameters of dragging
94	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
95
96	active_item=(get_item_at(clicked_x, clicked_y));
97	active_node=INVALID;
98	for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)
99	{
100	if(nodesmap[i]==active_item)
101	{
102	active_node=i;
103	}
104	}
105	switch(e->button.button)
106	{
107	case 3:
108	isbutton=3;
109	break;
110	default:
111	isbutton=1;
112	break;
113	}
114	break;
115	case GDK_BUTTON_RELEASE:
116	if (coord_text)
117	{
118	delete coord_text;
119	coord_text = 0;
120	}
121	isbutton=0;
122	active_item=NULL;
123	active_node=INVALID;
124	break;
125	case GDK_MOTION_NOTIFY:
126	//we only have to do sg. if the mouse button is pressed AND the click was on a node that was found in the set of nodes
127	if(active_node!=INVALID)
128	{
129	mapstorage.modified = true;
130
131	//new coordinates will be the old values,
132	//because the item will be moved to the
133	//new coordinate therefore the new movement
134	//has to be calculated from here
135
136	double new_x, new_y;
137
138	window_to_world (e->motion.x, e->motion.y, new_x, new_y);
139
140	double dx=new_x-clicked_x;
141	double dy=new_y-clicked_y;
142
143	//repositioning node and its text
144	active_item->move(dx, dy);
145	nodetextmap[active_node]->move(dx, dy);
146
147	// the new coordinates of the centre of the node
148	double coord_x = new_x - (clicked_x - mapstorage.coords[active_node].x);
149	double coord_y = new_y - (clicked_y - mapstorage.coords[active_node].y);
150
151	clicked_x=new_x;
152	clicked_y=new_y;
153
154	// write back the new coordinates to the coords map
155	mapstorage.coords.set(active_node, xy<double>(coord_x, coord_y));
156
157	// reposition the coordinates text
158	std::ostringstream ostr;
159	ostr << "(" <<
160	mapstorage.coords[active_node].x << ", " <<
161	mapstorage.coords[active_node].y << ")";
162	double radius =
163	(nodesmap[active_node]->property_x2().get_value() -
164	nodesmap[active_node]->property_x1().get_value()) / 2.0;
165	if (coord_text)
166	{
167	coord_text->property_text().set_value(ostr.str());
168	coord_text->property_x().set_value(mapstorage.coords[active_node].x +
169	radius);
170	coord_text->property_y().set_value(mapstorage.coords[active_node].y -
171	radius);
172	}
173	else
174	{
175	coord_text = new Gnome::Canvas::Text(
176	displayed_graph,
177	mapstorage.coords[active_node].x + radius,
178	mapstorage.coords[active_node].y - radius,
179	ostr.str());
180	coord_text->property_fill_color().set_value("black");
181	coord_text->property_anchor().set_value(Gtk::ANCHOR_SOUTH_WEST);
182	}
183
184	//all the edges connected to the moved point has to be redrawn
185	for(OutEdgeIt ei(mapstorage.graph,active_node);ei!=INVALID;++ei)
186	{
187	Gnome::Canvas::Points coos;
188	double x1, x2, y1, y2;
189
190	nodesmap[mapstorage.graph.source(ei)]->get_bounds(x1, y1, x2, y2);
191	coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
192
193	nodesmap[mapstorage.graph.target(ei)]->get_bounds(x1, y1, x2, y2);
194	coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
195
196	if(isbutton==3)
197	{
198	edgesmap[ei]->setPoints(coos);
199	}
200	else
201	{
202	edgesmap[ei]->setPoints(coos,true);
203	}
204
205	//reposition of edgetext
206	xy<double> text_pos=edgesmap[ei]->getArrowPos();
207	text_pos+=(xy<double>(10,10));
208	edgetextmap[ei]->property_x().set_value(text_pos.x);
209	edgetextmap[ei]->property_y().set_value(text_pos.y);
210	}
211
212	for(InEdgeIt ei(mapstorage.graph,active_node);ei!=INVALID;++ei)
213	{
214	Gnome::Canvas::Points coos;
215	double x1, x2, y1, y2;
216
217	nodesmap[mapstorage.graph.source(ei)]->get_bounds(x1, y1, x2, y2);
218	coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
219
220	nodesmap[mapstorage.graph.target(ei)]->get_bounds(x1, y1, x2, y2);
221	coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
222
223	if(isbutton==3)
224	{
225	edgesmap[ei]->setPoints(coos);
226	}
227	else
228	{
229	edgesmap[ei]->setPoints(coos,true);
230	}
231
232	xy<double> text_pos=edgesmap[ei]->getArrowPos();
233	text_pos+=(xy<double>(10,10));
234	edgetextmap[ei]->property_x().set_value(text_pos.x);
235	edgetextmap[ei]->property_y().set_value(text_pos.y);
236	}
237	}
238	default: break;
239	}
240
241	return false;
242	}
243
244	bool GraphDisplayerCanvas::createNodeEventHandler(GdkEvent* e)
245	{
246	switch(e->type)
247	{
248	//move the new node
249	case GDK_MOTION_NOTIFY:
250	{
251	GdkEvent * generated=new GdkEvent();
252	generated->motion.x=e->motion.x;
253	generated->motion.y=e->motion.y;
254	generated->type=GDK_MOTION_NOTIFY;
255	moveEventHandler(generated);
256	break;
257	}
258
259	case GDK_BUTTON_RELEASE:
260	mapstorage.modified = true;
261
262	isbutton=1;
263
264	active_node=mapstorage.graph.addNode();
265
266	//initiating values corresponding to new node in maps
267
268	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
269
270	// update coordinates
271	mapstorage.coords.set(active_node, xy<double>(clicked_x, clicked_y));
272
273	// update all other maps
274	for (std::map<std::string, Graph::NodeMap<double>*>::const_iterator it =
275	mapstorage.nodemap_storage.begin(); it !=
276	mapstorage.nodemap_storage.end(); ++it)
277	{
278	if ((it->first != "coordinates_x") &&
279	(it->first != "coordinates_y"))
280	{
281	(*(it->second))[active_node] =
282	mapstorage.nodemap_default[it->first];
283	}
284	}
285	// increment the id map's default value
286	mapstorage.nodemap_default["id"] += 1.0;
287
288	nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph,
289	clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20);
290	active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]);
291	*(nodesmap[active_node]) <<
292	Gnome::Canvas::Properties::fill_color("blue");
293	*(nodesmap[active_node]) <<
294	Gnome::Canvas::Properties::outline_color("black");
295	active_item->raise_to_top();
296
297	(nodesmap[active_node])->show();
298
299	nodetextmap[active_node]=new Gnome::Canvas::Text(displayed_graph,
300	clicked_x+node_property_defaults[N_RADIUS]+5,
301	clicked_y+node_property_defaults[N_RADIUS]+5, "");
302	nodetextmap[active_node]->property_fill_color().set_value("darkblue");
303	nodetextmap[active_node]->raise_to_top();
304
305	mapwin.updateNode(active_node);
306
307	isbutton=0;
308	target_item=NULL;
309	active_item=NULL;
310	active_node=INVALID;
311
312	break;
313	default:
314	break;
315	}
316	return false;
317	}
318
319	bool GraphDisplayerCanvas::createEdgeEventHandler(GdkEvent* e)
320	{
321	switch(e->type)
322	{
323	case GDK_BUTTON_PRESS:
324	//in edge creation right button has special meaning
325	if(e->button.button!=3)
326	{
327	//there is not yet selected node
328	if(active_node==INVALID)
329	{
330	//we mark the location of the event to be able to calculate parameters of dragging
331
332	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
333
334	active_item=(get_item_at(clicked_x, clicked_y));
335	active_node=INVALID;
336	for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)
337	{
338	if(nodesmap[i]==active_item)
339	{
340	active_node=i;
341	}
342	}
343	//the clicked item is really a node
344	if(active_node!=INVALID)
345	{
346	*(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
347	isbutton=1;
348	}
349	//clicked item was not a node. It could be e.g. edge.
350	else
351	{
352	active_item=NULL;
353	}
354	}
355	//we only have to do sg. if the mouse button
356	// is pressed already once AND the click was
357	// on a node that was found in the set of
358	//nodes, and now we only search for the second
359	//node
360	else
361	{
362	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
363	target_item=(get_item_at(clicked_x, clicked_y));
364	Node target_node=INVALID;
365	for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)
366	{
367	if(nodesmap[i]==target_item)
368	{
369	target_node=i;
370	}
371	}
372	//the clicked item is a node, the edge can be drawn
373	if(target_node!=INVALID)
374	{
375	if(target_node!=active_node)
376	{
377	mapstorage.modified = true;
378
379	*(nodesmap[target_node]) <<
380	Gnome::Canvas::Properties::fill_color("red");
381
382	//creating new edge
383	active_edge=mapstorage.graph.addEdge(active_node,
384	target_node);
385
386	// update maps
387	for (std::map<std::string,
388	Graph::EdgeMap<double>*>::const_iterator it =
389	mapstorage.edgemap_storage.begin(); it !=
390	mapstorage.edgemap_storage.end(); ++it)
391	{
392	(*(it->second))[active_edge] =
393	mapstorage.edgemap_default[it->first];
394	}
395	// increment the id map's default value
396	mapstorage.edgemap_default["id"] += 1.0;
397
398	//calculating coordinates of new edge
399	Gnome::Canvas::Points coos;
400	double x1, x2, y1, y2;
401
402	active_item->get_bounds(x1, y1, x2, y2);
403	coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
404
405	target_item->get_bounds(x1, y1, x2, y2);
406	coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
407
408	//drawing new edge
409	edgesmap[active_edge]=new BrokenEdge(displayed_graph, coos,
410	*this);
411	*(edgesmap[active_edge]) <<
412	Gnome::Canvas::Properties::fill_color("green");
413	edgesmap[active_edge]->property_width_pixels().set_value(10);
414
415	edgesmap[active_edge]->lower_to_bottom();
416
417	//initializing edge-text as well, to empty string
418	xy<double> text_pos=edgesmap[active_edge]->getArrowPos();
419	text_pos+=(xy<double>(10,10));
420
421	edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph,
422	text_pos.x, text_pos.y, "");
423	edgetextmap[active_edge]->property_fill_color().set_value(
424	"darkgreen");
425	edgetextmap[active_edge]->raise_to_top();
426
427	//updating its properties
428	mapwin.updateEdge(active_edge);
429	}
430	else
431	{
432	target_node=INVALID;
433	std::cerr << "Loop edge is not yet implemented!" << std::endl;
434	}
435	}
436	//clicked item was not a node. it could be an e.g. edge. we do not
437	//deal with it furthermore.
438	else
439	{
440	target_item=NULL;
441	}
442	}
443	}
444	break;
445	case GDK_BUTTON_RELEASE:
446	isbutton=0;
447	//we clear settings in two cases
448	//1: the edge is ready (target_item has valid value)
449	//2: the edge creation is cancelled with right button
450	if((target_item)\|\|(e->button.button==3))
451	{
452	if(active_item)
453	{
454	*active_item << Gnome::Canvas::Properties::fill_color("blue");
455	active_item=NULL;
456	}
457	if(target_item)
458	{
459	*target_item << Gnome::Canvas::Properties::fill_color("blue");
460	target_item=NULL;
461	}
462	active_node=INVALID;
463	active_edge=INVALID;
464	}
465	break;
466	default:
467	break;
468	}
469	return false;
470	}
471
472	bool GraphDisplayerCanvas::eraserEventHandler(GdkEvent* e)
473	{
474	switch(e->type)
475	{
476	case GDK_BUTTON_PRESS:
477	//finding the clicked items
478	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
479	active_item=(get_item_at(clicked_x, clicked_y));
480	active_node=INVALID;
481	active_edge=INVALID;
482	//was it a node?
483	for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)
484	{
485	if(nodesmap[i]==active_item)
486	{
487	active_node=i;
488	}
489	}
490	//or was it an edge?
491	if(active_node==INVALID)
492	{
493	for (EdgeIt i(mapstorage.graph); i!=INVALID; ++i)
494	{
495	if(edgesmap[i]==active_item)
496	{
497	active_edge=i;
498	}
499	}
500	}
501
502	//recolor activated item
503	if(active_item)
504	{
505	*active_item << Gnome::Canvas::Properties::fill_color("red");
506	}
507	break;
508
509	case GDK_BUTTON_RELEASE:
510	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
511	if(active_item)
512	{
513	//the cursor was not moved since pressing it
514	if( active_item == ( get_item_at (clicked_x, clicked_y) ) )
515	{
516	//a node was found
517	if(active_node!=INVALID)
518	{
519	mapstorage.modified = true;
520
521	std::set<Graph::Edge> edges_to_delete;
522
523	for(OutEdgeIt e(mapstorage.graph,active_node);e!=INVALID;++e)
524	{
525	edges_to_delete.insert(e);
526	}
527
528	for(InEdgeIt e(mapstorage.graph,active_node);e!=INVALID;++e)
529	{
530	edges_to_delete.insert(e);
531	}
532
533	//deleting collected edges
534	for(std::set<Graph::Edge>::iterator
535	edge_set_it=edges_to_delete.begin();
536	edge_set_it!=edges_to_delete.end();
537	++edge_set_it)
538	{
539	deleteItem(*edge_set_it);
540	}
541	deleteItem(active_node);
542	}
543	//a simple edge was chosen
544	else
545	{
546	deleteItem(active_edge);
547	}
548	}
549	//pointer was moved, deletion is cancelled
550	else
551	{
552	if(active_node!=INVALID)
553	{
554	*active_item << Gnome::Canvas::Properties::fill_color("blue");
555	}
556	else
557	{
558	*active_item << Gnome::Canvas::Properties::fill_color("green");
559	}
560	}
561	}
562	//reseting datas
563	active_item=NULL;
564	active_edge=INVALID;
565	active_node=INVALID;
566	break;
567
568	case GDK_MOTION_NOTIFY:
569	break;
570
571	default:
572	break;
573	}
574	return false;
575	}
576
577	bool GraphDisplayerCanvas::edgeMapEditEventHandler(GdkEvent* e)
578	{
579	if(actual_tool==EDGE_MAP_EDIT)
580	{
581	switch(e->type)
582	{
583	case GDK_BUTTON_PRESS:
584	{
585	//for determine, whether it was an edge
586	Edge clicked_edge=INVALID;
587
588	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
589	active_item=(get_item_at(clicked_x, clicked_y));
590
591	//find the activated item between texts
592	for (EdgeIt i(mapstorage.graph); i!=INVALID; ++i)
593	{
594	//at the same time only one can be active
595	if(edgetextmap[i]==active_item)
596	{
597	clicked_edge=i;
598	}
599	}
600
601	//if it was not between texts, search for it between edges
602	if(clicked_edge==INVALID)
603	{
604	for (EdgeIt i(mapstorage.graph); i!=INVALID; ++i)
605	{
606	//at the same time only one can be active
607	if((edgesmap[i]==active_item)\|\|(edgetextmap[i]==active_item))
608	{
609	clicked_edge=i;
610	}
611	}
612	}
613
614	//if it was really an edge...
615	if(clicked_edge!=INVALID)
616	{
617	// the id map is not editable
618	if (edgemap_to_edit == "id") return 0;
619
620	//and there is activated map
621	if(edgetextmap[clicked_edge]->property_text().get_value()!="")
622	{
623	//activate the general variable for it
624	active_edge=clicked_edge;
625
626	//create a dialog
627	Gtk::Dialog dialog("Edit value", *parentwin, true);
628	dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
629	dialog.add_button(Gtk::Stock::OK, Gtk::RESPONSE_ACCEPT);
630	Gtk::VBox* vbox = dialog.get_vbox();
631	Gtk::Adjustment adj(
632	(*mapstorage.edgemap_storage[edgemap_to_edit])[active_edge],
633	-1000000.0,
634	1000000.0,
635	1.0, 5.0, 0.0);
636	//TODO: find out why doesn't it work with
637	//numeric_limits<double>::min/max
638	Gtk::SpinButton spin(adj);
639	spin.set_numeric(true);
640	spin.set_digits(4);
641	vbox->add(spin);
642	spin.show();
643	switch (dialog.run())
644	{
645	case Gtk::RESPONSE_NONE:
646	case Gtk::RESPONSE_CANCEL:
647	break;
648	case Gtk::RESPONSE_ACCEPT:
649	double new_value = spin.get_value();
650	(*mapstorage.edgemap_storage[edgemap_to_edit])[active_edge] =
651	new_value;
652	std::ostringstream ostr;
653	ostr << new_value;
654	edgetextmap[active_edge]->property_text().set_value(
655	ostr.str());
656	//mapwin.updateEdge(active_edge);
657	mapwin.updateEdge(Edge(INVALID));
658	}
659	}
660	}
661	break;
662	}
663	default:
664	break;
665	}
666	}
667	return false;
668	}
669
670	bool GraphDisplayerCanvas::nodeMapEditEventHandler(GdkEvent* e)
671	{
672	if(actual_tool==NODE_MAP_EDIT)
673	{
674	switch(e->type)
675	{
676	case GDK_BUTTON_PRESS:
677	{
678	//for determine, whether it was a node
679	Node clicked_node=INVALID;
680
681	window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
682	active_item=(get_item_at(clicked_x, clicked_y));
683
684	//find the activated item between texts
685	for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)
686	{
687	//at the same time only one can be active
688	if(nodetextmap[i]==active_item)
689	{
690	clicked_node=i;
691	}
692	}
693
694	//if there was not, search for it between nodes
695	if(clicked_node==INVALID)
696	{
697	for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)
698	{
699	//at the same time only one can be active
700	if(nodesmap[i]==active_item)
701	{
702	clicked_node=i;
703	}
704	}
705	}
706
707	//if it was really a node...
708	if(clicked_node!=INVALID)
709	{
710	// the id map is not editable
711	if (nodemap_to_edit == "id") return 0;
712
713	//and there is activated map
714	if(nodetextmap[clicked_node]->property_text().get_value()!="")
715	{
716	//activate the general variable for it
717	active_node=clicked_node;
718
719	//create a dialog
720	Gtk::Dialog dialog("Edit value", *parentwin, true);
721	dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
722	dialog.add_button(Gtk::Stock::OK, Gtk::RESPONSE_ACCEPT);
723	Gtk::VBox* vbox = dialog.get_vbox();
724	Gtk::Adjustment adj(
725	(*mapstorage.nodemap_storage[nodemap_to_edit])[active_node],
726	-1000000.0,
727	1000000.0,
728	1.0, 5.0, 0.0);
729	//TODO: find out why doesn't it work with
730	//numeric_limits<double>::min/max
731	Gtk::SpinButton spin(adj);
732	spin.set_numeric(true);
733	spin.set_digits(4);
734	vbox->add(spin);
735	spin.show();
736	switch (dialog.run())
737	{
738	case Gtk::RESPONSE_NONE:
739	case Gtk::RESPONSE_CANCEL:
740	break;
741	case Gtk::RESPONSE_ACCEPT:
742	double new_value = spin.get_value();
743	(*mapstorage.nodemap_storage[nodemap_to_edit])[active_node] =
744	new_value;
745	std::ostringstream ostr;
746	ostr << new_value;
747	nodetextmap[active_node]->property_text().set_value(
748	ostr.str());
749	//mapwin.updateNode(active_node);
750	mapwin.updateNode(Node(INVALID));
751	}
752	}
753	}
754	break;
755	}
756	default:
757	break;
758	}
759	}
760	return false;
761	}
762
763	void GraphDisplayerCanvas::deleteItem(Node node_to_delete)
764	{
765	delete(nodetextmap[node_to_delete]);
766	delete(nodesmap[node_to_delete]);
767	mapstorage.graph.erase(node_to_delete);
768	}
769
770	void GraphDisplayerCanvas::deleteItem(Edge edge_to_delete)
771	{
772	delete(edgetextmap[edge_to_delete]);
773	delete(edgesmap[edge_to_delete]);
774	mapstorage.graph.erase(edge_to_delete);
775	}
776
777	void GraphDisplayerCanvas::textReposition(xy<double> new_place)
778	{
779	new_place+=(xy<double>(10,10));
780	edgetextmap[forming_edge]->property_x().set_value(new_place.x);
781	edgetextmap[forming_edge]->property_y().set_value(new_place.y);
782	}
783
784	void GraphDisplayerCanvas::toggleEdgeActivity(BrokenEdge* active_bre, bool on)
785	{
786	if(on)
787	{
788	if(forming_edge!=INVALID)
789	{
790	std::cerr << "ERROR!!!! Valid edge found!" << std::endl;
791	}
792	else
793	{
794	for (EdgeIt i(mapstorage.graph); i!=INVALID; ++i)
795	{
796	if(edgesmap[i]==active_bre)
797	{
798	forming_edge=i;
799	}
800	}
801	}
802	}
803	else
804	{
805	if(forming_edge!=INVALID)
806	{
807	forming_edge=INVALID;
808	}
809	else
810	{
811	std::cerr << "ERROR!!!! Invalid edge found!" << std::endl;
812	}
813	}
814
815	}
816
817	int GraphDisplayerCanvas::addNewEdgeMap(double default_value, std::string mapname)
818	{
819	//create the new map
820	Graph::EdgeMap<double> * emptr=new Graph::EdgeMap<double> (mapstorage.graph, default_value);
821
822	//if addition was not successful addEdgeMap returns one.
823	//cause can be that there is already a map named like the new one
824	if(mapstorage.addEdgeMap(mapname,emptr, default_value))
825	{
826	return 1;
827	}
828
829
830	//add it to the list of the displayable maps
831	mapwin.registerNewEdgeMap(mapname);
832
833	//display it
834	changeEdgeText(mapname);
835
836	return 0;
837	}
838
839	int GraphDisplayerCanvas::addNewNodeMap(double default_value, std::string mapname)
840	{
841	//create the new map
842	Graph::NodeMap<double> * emptr=new Graph::NodeMap<double> (mapstorage.graph,default_value);
843
844	//if addition was not successful addNodeMap returns one.
845	//cause can be that there is already a map named like the new one
846	if(mapstorage.addNodeMap(mapname,emptr, default_value))
847	{
848	return 1;
849	}
850
851	//add it to the list of the displayable maps
852	mapwin.registerNewNodeMap(mapname);
853
854	//display it
855	changeNodeText(mapname);
856
857	return 0;
858	}
859

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