When moving nodes with midbutton little red arrows keep their position.
1 #include "graph_displayer_canvas.h"
5 bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event)
7 Gnome::Canvas::CanvasAA::on_expose_event(event);
13 void GraphDisplayerCanvas::changeEditorialTool(int newtool)
15 if(actual_tool!=newtool)
18 actual_handler.disconnect();
24 GdkEvent * generated=new GdkEvent();
25 generated->type=GDK_BUTTON_RELEASE;
26 generated->button.button=3;
27 createEdgeEventHandler(generated);
31 //has to do the same thing as in the case of NODE_MAP_EDIT
51 actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::moveEventHandler), false);
55 actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::createNodeEventHandler), false);
59 actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::createEdgeEventHandler), false);
63 actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraserEventHandler), false);
68 actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::edgeMapEditEventHandler), false);
72 actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::nodeMapEditEventHandler), false);
81 int GraphDisplayerCanvas::getActualTool()
86 bool GraphDisplayerCanvas::moveEventHandler(GdkEvent* e)
88 static Gnome::Canvas::Text *coord_text = 0;
91 case GDK_BUTTON_PRESS:
92 //we mark the location of the event to be able to calculate parameters of dragging
93 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
95 active_item=(get_item_at(clicked_x, clicked_y));
97 for (NodeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
99 if(nodesmap[i]==active_item)
104 isbutton=e->button.button;
106 case GDK_BUTTON_RELEASE:
116 case GDK_MOTION_NOTIFY:
117 //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
118 if(active_node!=INVALID)
120 (mytab.mapstorage).modified = true;
122 //new coordinates will be the old values,
123 //because the item will be moved to the
124 //new coordinate therefore the new movement
125 //has to be calculated from here
129 window_to_world (e->motion.x, e->motion.y, new_x, new_y);
131 double dx=new_x-clicked_x;
132 double dy=new_y-clicked_y;
134 //repositioning node and its text
135 active_item->move(dx, dy);
136 nodetextmap[active_node]->move(dx, dy);
138 // the new coordinates of the centre of the node
139 double coord_x = new_x - (clicked_x - (mytab.mapstorage).coords[active_node].x);
140 double coord_y = new_y - (clicked_y - (mytab.mapstorage).coords[active_node].y);
142 // write back the new coordinates to the coords map
143 (mytab.mapstorage).coords.set(active_node, xy<double>(coord_x, coord_y));
148 // reposition the coordinates text
149 std::ostringstream ostr;
151 (mytab.mapstorage).coords[active_node].x << ", " <<
152 (mytab.mapstorage).coords[active_node].y << ")";
154 (nodesmap[active_node]->property_x2().get_value() -
155 nodesmap[active_node]->property_x1().get_value()) / 2.0;
158 coord_text->property_text().set_value(ostr.str());
159 coord_text->property_x().set_value((mytab.mapstorage).coords[active_node].x +
161 coord_text->property_y().set_value((mytab.mapstorage).coords[active_node].y -
166 coord_text = new Gnome::Canvas::Text(
168 (mytab.mapstorage).coords[active_node].x + radius,
169 (mytab.mapstorage).coords[active_node].y - radius,
171 coord_text->property_fill_color().set_value("black");
172 coord_text->property_anchor().set_value(Gtk::ANCHOR_SOUTH_WEST);
175 //all the edges connected to the moved point has to be redrawn
176 for(OutEdgeIt ei((mytab.mapstorage).graph,active_node);ei!=INVALID;++ei)
178 XY moved_node_1(coord_x - dx, coord_y - dy);
179 XY moved_node_2(coord_x, coord_y);
180 Node target = mytab.mapstorage.graph.target(ei);
181 XY fix_node(mytab.mapstorage.coords[target].x,
182 mytab.mapstorage.coords[target].y);
183 XY old_arrow_pos(mytab.mapstorage.arrow_pos[ei]);
186 arrow_pos = calcArrowPos(moved_node_1, moved_node_2, fix_node, old_arrow_pos, isbutton);
188 mytab.mapstorage.arrow_pos.set(ei, arrow_pos);
189 edgesmap[ei]->draw();
191 //reposition of edgetext
192 XY text_pos=mytab.mapstorage.arrow_pos[ei];
193 text_pos+=(XY(10,10));
194 edgetextmap[ei]->property_x().set_value(text_pos.x);
195 edgetextmap[ei]->property_y().set_value(text_pos.y);
198 for(InEdgeIt ei((mytab.mapstorage).graph,active_node);ei!=INVALID;++ei)
200 XY moved_node_1(coord_x - dx, coord_y - dy);
201 XY moved_node_2(coord_x, coord_y);
202 Node source = mytab.mapstorage.graph.source(ei);
203 XY fix_node(mytab.mapstorage.coords[source].x,
204 mytab.mapstorage.coords[source].y);
205 XY old_arrow_pos(mytab.mapstorage.arrow_pos[ei]);
208 arrow_pos = calcArrowPos(moved_node_1, moved_node_2, fix_node, old_arrow_pos, isbutton);
210 mytab.mapstorage.arrow_pos.set(ei, arrow_pos);
211 edgesmap[ei]->draw();
213 //reposition of edgetext
214 XY text_pos=mytab.mapstorage.arrow_pos[ei];
215 text_pos+=(XY(10,10));
216 edgetextmap[ei]->property_x().set_value(text_pos.x);
217 edgetextmap[ei]->property_y().set_value(text_pos.y);
226 XY GraphDisplayerCanvas::calcArrowPos(XY moved_node_1, XY moved_node_2, XY fix_node, XY old_arrow_pos, int move_code)
231 return XY((moved_node_2.x + fix_node.x) / 2.0, (moved_node_2.y + fix_node.y) / 2.0);
234 return old_arrow_pos;
238 //////////////////////////////////////////////////////////////////////////////////////////////////////
239 /////////// keeps shape-with scalar multiplication - version 2.
240 //////////////////////////////////////////////////////////////////////////////////////////////////////
242 //old vector from one to the other node - a
243 xy<double> a_v(moved_node_1.x-fix_node.x,moved_node_1.y-fix_node.y);
244 //new vector from one to the other node - b
245 xy<double> b_v(moved_node_2.x-fix_node.x,moved_node_2.y-fix_node.y);
247 double absa=sqrt(a_v.normSquare());
248 double absb=sqrt(b_v.normSquare());
250 if ((absa == 0.0) || (absb == 0.0))
252 return old_arrow_pos;
256 //old vector from one node to the breakpoint - c
257 xy<double> c_v(old_arrow_pos.x-fix_node.x,old_arrow_pos.y-fix_node.y);
259 //unit vector with the same direction to a_v
260 xy<double> a_v_u(a_v.x/absa,a_v.y/absa);
262 //normal vector of unit vector with the same direction to a_v
263 xy<double> a_v_u_n(((-1)*a_v_u.y),a_v_u.x);
265 //unit vector with the same direction to b_v
266 xy<double> b_v_u(b_v.x/absb,b_v.y/absb);
268 //normal vector of unit vector with the same direction to b_v
269 xy<double> b_v_u_n(((-1)*b_v_u.y),b_v_u.x);
271 //vector c in a_v_u and a_v_u_n co-ordinate system
272 xy<double> c_a(c_v*a_v_u,c_v*a_v_u_n);
274 //new vector from one node to the breakpoint - d - we have to calculate this one
275 xy<double> d_v=absb/absa*(c_a.x*b_v_u+c_a.y*b_v_u_n);
277 return XY(d_v.x+fix_node.x,d_v.y+fix_node.y);
287 bool GraphDisplayerCanvas::createNodeEventHandler(GdkEvent* e)
292 case GDK_MOTION_NOTIFY:
294 GdkEvent * generated=new GdkEvent();
295 generated->motion.x=e->motion.x;
296 generated->motion.y=e->motion.y;
297 generated->type=GDK_MOTION_NOTIFY;
298 moveEventHandler(generated);
302 case GDK_BUTTON_RELEASE:
303 (mytab.mapstorage).modified = true;
307 active_node=(mytab.mapstorage).graph.addNode();
309 //initiating values corresponding to new node in maps
311 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
313 // update coordinates
314 (mytab.mapstorage).coords.set(active_node, xy<double>(clicked_x, clicked_y));
316 // update all other maps
317 for (std::map<std::string, Graph::NodeMap<double>*>::const_iterator it =
318 (mytab.mapstorage).nodemap_storage.begin(); it !=
319 (mytab.mapstorage).nodemap_storage.end(); ++it)
321 if ((it->first != "coordinates_x") &&
322 (it->first != "coordinates_y"))
324 (*(it->second))[active_node] =
325 (mytab.mapstorage).nodemap_default[it->first];
328 // increment the id map's default value
329 (mytab.mapstorage).nodemap_default["label"] += 1.0;
331 nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph,
332 clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20);
333 active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]);
334 *(nodesmap[active_node]) <<
335 Gnome::Canvas::Properties::fill_color("blue");
336 *(nodesmap[active_node]) <<
337 Gnome::Canvas::Properties::outline_color("black");
338 active_item->raise_to_top();
340 (nodesmap[active_node])->show();
342 nodetextmap[active_node]=new Gnome::Canvas::Text(displayed_graph,
343 clicked_x+node_property_defaults[N_RADIUS]+5,
344 clicked_y+node_property_defaults[N_RADIUS]+5, "");
345 nodetextmap[active_node]->property_fill_color().set_value("darkblue");
346 nodetextmap[active_node]->raise_to_top();
348 // mapwin.updateNode(active_node);
349 propertyUpdate(active_node);
362 bool GraphDisplayerCanvas::createEdgeEventHandler(GdkEvent* e)
366 case GDK_BUTTON_PRESS:
367 //in edge creation right button has special meaning
368 if(e->button.button!=3)
370 //there is not yet selected node
371 if(active_node==INVALID)
373 //we mark the location of the event to be able to calculate parameters of dragging
375 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
377 active_item=(get_item_at(clicked_x, clicked_y));
379 for (NodeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
381 if(nodesmap[i]==active_item)
386 //the clicked item is really a node
387 if(active_node!=INVALID)
389 *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
392 //clicked item was not a node. It could be e.g. edge.
398 //we only have to do sg. if the mouse button
399 // is pressed already once AND the click was
400 // on a node that was found in the set of
401 //nodes, and now we only search for the second
405 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
406 target_item=(get_item_at(clicked_x, clicked_y));
407 Node target_node=INVALID;
408 for (NodeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
410 if(nodesmap[i]==target_item)
415 //the clicked item is a node, the edge can be drawn
416 if(target_node!=INVALID)
418 if(target_node!=active_node)
420 (mytab.mapstorage).modified = true;
422 *(nodesmap[target_node]) <<
423 Gnome::Canvas::Properties::fill_color("red");
426 active_edge=(mytab.mapstorage).graph.addEdge(active_node,
430 for (std::map<std::string,
431 Graph::EdgeMap<double>*>::const_iterator it =
432 (mytab.mapstorage).edgemap_storage.begin(); it !=
433 (mytab.mapstorage).edgemap_storage.end(); ++it)
435 (*(it->second))[active_edge] =
436 (mytab.mapstorage).edgemap_default[it->first];
438 // increment the id map's default value
439 (mytab.mapstorage).edgemap_default["label"] += 1.0;
441 //calculating coordinates of new edge
442 Gnome::Canvas::Points coos;
443 double x1, x2, y1, y2;
445 active_item->get_bounds(x1, y1, x2, y2);
446 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
448 target_item->get_bounds(x1, y1, x2, y2);
449 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
451 // set the coordinates of the arrow on the new edge
452 MapStorage& ms = mytab.mapstorage;
453 ms.arrow_pos.set(active_edge,
454 (ms.coords[ms.graph.source(active_edge)] +
455 ms.coords[ms.graph.target(active_edge)])/ 2.0);
458 edgesmap[active_edge]=new BrokenEdge(displayed_graph, active_edge,
461 //initializing edge-text as well, to empty string
462 XY text_pos=mytab.mapstorage.arrow_pos[active_edge];
463 text_pos+=(XY(10,10));
465 edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph,
466 text_pos.x, text_pos.y, "");
467 edgetextmap[active_edge]->property_fill_color().set_value(
469 edgetextmap[active_edge]->raise_to_top();
471 //updating its properties
472 // mapwin.updateEdge(active_edge);
473 propertyUpdate(active_edge);
478 std::cerr << "Loop edge is not yet implemented!" << std::endl;
481 //clicked item was not a node. it could be an e.g. edge. we do not
482 //deal with it furthermore.
490 case GDK_BUTTON_RELEASE:
492 //we clear settings in two cases
493 //1: the edge is ready (target_item has valid value)
494 //2: the edge creation is cancelled with right button
495 if((target_item)||(e->button.button==3))
499 *active_item << Gnome::Canvas::Properties::fill_color("blue");
504 *target_item << Gnome::Canvas::Properties::fill_color("blue");
517 bool GraphDisplayerCanvas::eraserEventHandler(GdkEvent* e)
521 case GDK_BUTTON_PRESS:
522 //finding the clicked items
523 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
524 active_item=(get_item_at(clicked_x, clicked_y));
528 for (NodeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
530 if(nodesmap[i]==active_item)
536 if(active_node==INVALID)
538 for (EdgeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
540 if(edgesmap[i]==active_item)
547 // return if the clicked object is neither an edge nor a node
548 if (active_edge == INVALID) return false;
550 //recolor activated item
553 *active_item << Gnome::Canvas::Properties::fill_color("red");
557 case GDK_BUTTON_RELEASE:
558 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
561 //the cursor was not moved since pressing it
562 if( active_item == ( get_item_at (clicked_x, clicked_y) ) )
565 if(active_node!=INVALID)
567 (mytab.mapstorage).modified = true;
569 std::set<Graph::Edge> edges_to_delete;
571 for(OutEdgeIt e((mytab.mapstorage).graph,active_node);e!=INVALID;++e)
573 edges_to_delete.insert(e);
576 for(InEdgeIt e((mytab.mapstorage).graph,active_node);e!=INVALID;++e)
578 edges_to_delete.insert(e);
581 //deleting collected edges
582 for(std::set<Graph::Edge>::iterator
583 edge_set_it=edges_to_delete.begin();
584 edge_set_it!=edges_to_delete.end();
587 deleteItem(*edge_set_it);
589 deleteItem(active_node);
591 //a simple edge was chosen
592 else if (active_edge != INVALID)
594 deleteItem(active_edge);
597 //pointer was moved, deletion is cancelled
600 if(active_node!=INVALID)
602 *active_item << Gnome::Canvas::Properties::fill_color("blue");
604 else if (active_edge != INVALID)
606 *active_item << Gnome::Canvas::Properties::fill_color("green");
616 case GDK_MOTION_NOTIFY:
625 bool GraphDisplayerCanvas::edgeMapEditEventHandler(GdkEvent* e)
627 if(actual_tool==EDGE_MAP_EDIT)
631 case GDK_BUTTON_PRESS:
633 //for determine, whether it was an edge
634 Edge clicked_edge=INVALID;
636 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
637 active_item=(get_item_at(clicked_x, clicked_y));
639 //find the activated item between texts
640 for (EdgeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
642 //at the same time only one can be active
643 if(edgetextmap[i]==active_item)
649 //if it was not between texts, search for it between edges
650 if(clicked_edge==INVALID)
652 for (EdgeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
654 //at the same time only one can be active
655 if((edgesmap[i]==active_item)||(edgetextmap[i]==active_item))
662 //if it was really an edge...
663 if(clicked_edge!=INVALID)
665 // the id map is not editable
666 if (edgemap_to_edit == "label") return 0;
668 //and there is activated map
669 if(edgetextmap[clicked_edge]->property_text().get_value()!="")
671 //activate the general variable for it
672 active_edge=clicked_edge;
675 Gtk::Dialog dialog("Edit value", true);
676 dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
677 dialog.add_button(Gtk::Stock::OK, Gtk::RESPONSE_ACCEPT);
678 Gtk::VBox* vbox = dialog.get_vbox();
679 Gtk::SpinButton spin(0.0, 4);
680 spin.set_increments(1.0, 10.0);
681 spin.set_range(-1000000.0, 1000000.0);
682 spin.set_numeric(true);
685 switch (dialog.run())
687 case Gtk::RESPONSE_NONE:
688 case Gtk::RESPONSE_CANCEL:
690 case Gtk::RESPONSE_ACCEPT:
691 double new_value = spin.get_value();
692 (*(mytab.mapstorage).edgemap_storage[edgemap_to_edit])[active_edge] =
694 std::ostringstream ostr;
696 edgetextmap[active_edge]->property_text().set_value(
698 //mapwin.updateEdge(active_edge);
699 // mapwin.updateEdge(Edge(INVALID));
700 propertyUpdate(Edge(INVALID));
713 bool GraphDisplayerCanvas::nodeMapEditEventHandler(GdkEvent* e)
715 if(actual_tool==NODE_MAP_EDIT)
719 case GDK_BUTTON_PRESS:
721 //for determine, whether it was a node
722 Node clicked_node=INVALID;
724 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
725 active_item=(get_item_at(clicked_x, clicked_y));
727 //find the activated item between texts
728 for (NodeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
730 //at the same time only one can be active
731 if(nodetextmap[i]==active_item)
737 //if there was not, search for it between nodes
738 if(clicked_node==INVALID)
740 for (NodeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
742 //at the same time only one can be active
743 if(nodesmap[i]==active_item)
750 //if it was really a node...
751 if(clicked_node!=INVALID)
753 // the id map is not editable
754 if (nodemap_to_edit == "label") return 0;
756 //and there is activated map
757 if(nodetextmap[clicked_node]->property_text().get_value()!="")
759 //activate the general variable for it
760 active_node=clicked_node;
763 Gtk::Dialog dialog("Edit value", true);
764 dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
765 dialog.add_button(Gtk::Stock::OK, Gtk::RESPONSE_ACCEPT);
766 Gtk::VBox* vbox = dialog.get_vbox();
767 Gtk::SpinButton spin(0.0, 4);
768 spin.set_increments(1.0, 10.0);
769 spin.set_range(-1000000.0, 1000000.0);
770 spin.set_numeric(true);
773 switch (dialog.run())
775 case Gtk::RESPONSE_NONE:
776 case Gtk::RESPONSE_CANCEL:
778 case Gtk::RESPONSE_ACCEPT:
779 double new_value = spin.get_value();
780 (*(mytab.mapstorage).nodemap_storage[nodemap_to_edit])[active_node] =
782 std::ostringstream ostr;
784 nodetextmap[active_node]->property_text().set_value(
786 //mapwin.updateNode(active_node);
787 // mapwin.updateNode(Node(INVALID));
788 propertyUpdate(Node(INVALID));
801 void GraphDisplayerCanvas::deleteItem(Node node_to_delete)
803 delete(nodetextmap[node_to_delete]);
804 delete(nodesmap[node_to_delete]);
805 (mytab.mapstorage).graph.erase(node_to_delete);
808 void GraphDisplayerCanvas::deleteItem(Edge edge_to_delete)
810 delete(edgetextmap[edge_to_delete]);
811 delete(edgesmap[edge_to_delete]);
812 (mytab.mapstorage).graph.erase(edge_to_delete);
815 void GraphDisplayerCanvas::textReposition(xy<double> new_place)
817 new_place+=(xy<double>(10,10));
818 edgetextmap[forming_edge]->property_x().set_value(new_place.x);
819 edgetextmap[forming_edge]->property_y().set_value(new_place.y);
822 void GraphDisplayerCanvas::toggleEdgeActivity(EdgeBase* active_bre, bool on)
826 if(forming_edge!=INVALID)
828 std::cerr << "ERROR!!!! Valid edge found!" << std::endl;
832 for (EdgeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)
834 if(edgesmap[i]==active_bre)
843 if(forming_edge!=INVALID)
845 forming_edge=INVALID;
849 std::cerr << "ERROR!!!! Invalid edge found!" << std::endl;