File graph_displayer is split in functional parts.
1 #include <graph_displayer_canvas.h>
2 #include <broken_edge.h>
6 bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event)
8 Gnome::Canvas::CanvasAA::on_expose_event(event);
14 void GraphDisplayerCanvas::changeEditorialTool(int newtool)
16 actual_handler.disconnect();
18 if(actual_tool==CREATE_EDGE)
20 GdkEvent * generated=new GdkEvent();
21 generated->type=GDK_BUTTON_RELEASE;
22 generated->button.button=3;
23 create_edge_event_handler(generated);
31 actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::move_event_handler), false);
34 //it has to assigned to canvas, because all the canvas has to be monitored, not only the elements of the already drawn group
36 actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_node_event_handler), false);
40 actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false);
44 actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraser_event_handler), false);
52 int GraphDisplayerCanvas::get_actual_tool()
57 bool GraphDisplayerCanvas::move_event_handler(GdkEvent* e)
61 case GDK_BUTTON_PRESS:
62 //we mark the location of the event to be able to calculate parameters of dragging
63 clicked_x=e->button.x;
64 clicked_y=e->button.y;
65 active_item=(get_item_at(e->button.x, e->button.y));
67 for (NodeIt i(g); i!=INVALID; ++i)
69 if(nodesmap[i]==active_item)
74 switch(e->button.button)
84 case GDK_BUTTON_RELEASE:
90 case GDK_MOTION_NOTIFY:
91 //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
92 if(active_node!=INVALID)
94 //new coordinates will be the old values,
95 //because the item will be moved to the
96 //new coordinate therefore the new movement
97 //has to be calculated from here
99 double dx=e->motion.x-clicked_x;
100 double dy=e->motion.y-clicked_y;
102 active_item->move(dx, dy);
104 clicked_x=e->motion.x;
105 clicked_y=e->motion.y;
107 //all the edges connected to the moved point has to be redrawn
110 g.firstOut(ei,active_node);
112 for(;ei!=INVALID;g.nextOut(ei))
114 Gnome::Canvas::Points coos;
115 double x1, x2, y1, y2;
117 nodesmap[g.source(ei)]->get_bounds(x1, y1, x2, y2);
118 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
120 nodesmap[g.target(ei)]->get_bounds(x1, y1, x2, y2);
121 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
125 edgesmap[ei]->set_points(coos);
129 edgesmap[ei]->set_points(coos,true);
132 xy<double> text_pos=edgesmap[ei]->get_arrow_pos();
133 text_pos+=(xy<double>(10,10));
134 edgetextmap[ei]->property_x().set_value(text_pos.x);
135 edgetextmap[ei]->property_y().set_value(text_pos.y);
138 g.firstIn(ei,active_node);
139 for(;ei!=INVALID;g.nextIn(ei))
141 Gnome::Canvas::Points coos;
142 double x1, x2, y1, y2;
144 nodesmap[g.source(ei)]->get_bounds(x1, y1, x2, y2);
145 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
147 nodesmap[g.target(ei)]->get_bounds(x1, y1, x2, y2);
148 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
152 edgesmap[ei]->set_points(coos);
156 edgesmap[ei]->set_points(coos,true);
159 xy<double> text_pos=edgesmap[ei]->get_arrow_pos();
160 text_pos+=(xy<double>(10,10));
161 edgetextmap[ei]->property_x().set_value(text_pos.x);
162 edgetextmap[ei]->property_y().set_value(text_pos.y);
171 bool GraphDisplayerCanvas::create_node_event_handler(GdkEvent* e)
176 //draw the new node in red at the clicked place
177 case GDK_BUTTON_PRESS:
180 active_node=NodeIt(g,g.addNode());
182 //initiating values corresponding to new node in maps
185 window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
187 nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph, clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20);
188 active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]);
189 *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
190 *(nodesmap[active_node]) << Gnome::Canvas::Properties::outline_color("black");
191 (nodesmap[active_node])->show();
195 case GDK_MOTION_NOTIFY:
197 double world_motion_x, world_motion_y;
198 GdkEvent * generated=new GdkEvent();
199 window_to_world (e->motion.x, e->motion.y, world_motion_x, world_motion_y);
200 generated->motion.x=world_motion_x;
201 generated->motion.y=world_motion_y;
202 generated->type=GDK_MOTION_NOTIFY;
203 move_event_handler(generated);
207 //finalize the new node
208 case GDK_BUTTON_RELEASE:
210 *active_item << Gnome::Canvas::Properties::fill_color("blue");
213 updateScrollRegion();
221 bool GraphDisplayerCanvas::create_edge_event_handler(GdkEvent* e)
225 case GDK_BUTTON_PRESS:
226 //in edge creation right button has special meaning
227 if(e->button.button!=3)
229 //there is not yet selected node
230 if(active_node==INVALID)
232 //we mark the location of the event to be able to calculate parameters of dragging
233 clicked_x=e->button.x;
234 clicked_y=e->button.y;
235 active_item=(get_item_at(e->button.x, e->button.y));
237 for (NodeIt i(g); i!=INVALID; ++i)
239 if(nodesmap[i]==active_item)
244 //the clicked item is really a node
245 if(active_node!=INVALID)
247 *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
250 //clicked item was not a node. It could be e.g. edge.
256 //we only have to do sg. if the mouse button
257 // is pressed already once AND the click was
258 // on a node that was found in the set of
259 //nodes, and now we only search for the second
263 target_item=(get_item_at(e->button.x, e->button.y));
264 Graph::NodeIt target_node=INVALID;
265 for (NodeIt i(g); i!=INVALID; ++i)
267 if(nodesmap[i]==target_item)
272 //the clicked item is a node, the edge can be drawn
273 if(target_node!=INVALID)
275 *(nodesmap[target_node]) << Gnome::Canvas::Properties::fill_color("red");
278 active_edge=EdgeIt(g,g.addEdge(active_node, target_node));
280 //initiating values corresponding to new edge in maps
281 mapstorage.init_maps_for_edge(active_edge);
283 //calculating coordinates of new edge
284 Gnome::Canvas::Points coos;
285 double x1, x2, y1, y2;
287 active_item->get_bounds(x1, y1, x2, y2);
288 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
290 target_item->get_bounds(x1, y1, x2, y2);
291 coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
294 edgesmap[active_edge]=new BrokenEdge(displayed_graph, coos, *this);
295 *(edgesmap[active_edge]) << Gnome::Canvas::Properties::fill_color("green");
296 edgesmap[active_edge]->property_width_pixels().set_value(10);
298 //redraw nodes to blank terminations of the new edge
299 target_item->raise_to_top();
300 active_item->raise_to_top();
302 //initializing edge-text as well, to empty string
303 xy<double> text_pos=edgesmap[active_edge]->get_arrow_pos();
304 text_pos+=(xy<double>(10,10));
306 edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");
307 edgetextmap[active_edge]->property_fill_color().set_value("black");
309 //clicked item was not a node. it could be an e.g. edge. we do not deal with it furthermore.
317 case GDK_BUTTON_RELEASE:
319 //we clear settings in two cases
320 //1: the edge is ready (target_item has valid value)
321 //2: the edge creation is cancelled with right button
322 if((target_item)||(e->button.button==3))
326 *active_item << Gnome::Canvas::Properties::fill_color("blue");
331 *target_item << Gnome::Canvas::Properties::fill_color("blue");
344 bool GraphDisplayerCanvas::eraser_event_handler(GdkEvent* e)
348 case GDK_BUTTON_PRESS:
349 active_item=(get_item_at(e->button.x, e->button.y));
352 for (NodeIt i(g); i!=INVALID; ++i)
354 if(nodesmap[i]==active_item)
359 if(active_node==INVALID)
361 for (EdgeIt i(g); i!=INVALID; ++i)
363 if(edgesmap[i]==active_item)
369 *active_item << Gnome::Canvas::Properties::fill_color("red");
372 case GDK_BUTTON_RELEASE:
373 if(active_item==(get_item_at(e->button.x, e->button.y)))
375 if(active_node!=INVALID)
378 //collecting edges to delete
380 std::set<Graph::Edge> edges_to_delete;
382 g.firstOut(e,active_node);
383 for(;e!=INVALID;g.nextOut(e))
385 edges_to_delete.insert(e);
388 g.firstIn(e,active_node);
389 for(;e!=INVALID;g.nextIn(e))
391 edges_to_delete.insert(e);
394 //deleting collected edges
395 for(std::set<Graph::Edge>::iterator edge_set_it=edges_to_delete.begin();edge_set_it!=edges_to_delete.end();edge_set_it++)
397 delete_item(*edge_set_it);
399 delete_item(active_node);
401 //a simple edge was chosen
404 delete_item(active_edge);
409 //pointer was moved, deletion is cancelled
412 if(active_node!=INVALID)
414 *active_item << Gnome::Canvas::Properties::fill_color("blue");
418 *active_item << Gnome::Canvas::Properties::fill_color("green");
427 case GDK_MOTION_NOTIFY:
436 void GraphDisplayerCanvas::delete_item(NodeIt node_to_delete)
438 delete(nodesmap[node_to_delete]);
439 g.erase(node_to_delete);
442 void GraphDisplayerCanvas::delete_item(EdgeIt edge_to_delete)
444 delete(edgesmap[edge_to_delete]);
445 g.erase(edge_to_delete);
448 void GraphDisplayerCanvas::delete_item(Graph::Edge edge_to_delete)
450 delete(edgesmap[edge_to_delete]);
451 g.erase(edge_to_delete);
454 void GraphDisplayerCanvas::text_reposition(xy<double> new_place)
456 new_place+=(xy<double>(10,10));
457 edgetextmap[active_edge]->property_x().set_value(new_place.x);
458 edgetextmap[active_edge]->property_y().set_value(new_place.y);
461 void GraphDisplayerCanvas::toggle_edge_activity(BrokenEdge* active_bre, bool on)
465 if(active_edge!=INVALID)
467 std::cout << "ERROR!!!! Valid edge found!" << std::endl;
471 for (EdgeIt i(g); i!=INVALID; ++i)
473 if(edgesmap[i]==active_bre)
482 if(active_edge!=INVALID)
488 std::cout << "ERROR!!!! Invalid edge found!" << std::endl;