[6] | 1 | #include <graph_displayer_canvas.h> |
---|
| 2 | #include <math.h> |
---|
| 3 | |
---|
[11] | 4 | GraphDisplayerCanvas::GraphDisplayerCanvas(Graph & gr, CoordinatesMap & cm, MapStorage & ms):g(gr),nodesmap(g),edgesmap(g),edgetextmap(g),displayed_graph(*(root()), 0, 0),mapstorage(ms),isbutton(false),active_item(NULL),target_item(NULL) |
---|
[6] | 5 | { |
---|
[9] | 6 | |
---|
[11] | 7 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false); |
---|
[9] | 8 | |
---|
[6] | 9 | //set_center_scroll_region(true); |
---|
| 10 | |
---|
| 11 | //first edges are drawn, to hide joining with nodes later |
---|
| 12 | |
---|
| 13 | for (EdgeIt i(g); i!=INVALID; ++i) |
---|
| 14 | { |
---|
| 15 | |
---|
| 16 | //drawing green lines, coordinates are from cm |
---|
| 17 | |
---|
| 18 | Gnome::Canvas::Points coos; |
---|
| 19 | coos.push_back(Gnome::Art::Point(cm[g.source(i)].x,cm[g.source(i)].y)); |
---|
| 20 | coos.push_back(Gnome::Art::Point(cm[g.target(i)].x,cm[g.target(i)].y)); |
---|
| 21 | |
---|
| 22 | edgesmap[i]=new Gnome::Canvas::Line(displayed_graph, coos); |
---|
| 23 | *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green"); |
---|
| 24 | edgesmap[i]->property_width_pixels().set_value(10); |
---|
| 25 | |
---|
| 26 | //initializing edge-text as well, to empty string |
---|
| 27 | |
---|
| 28 | double x1, x2, y1, y2; |
---|
| 29 | edgesmap[i]->get_bounds(x1, y1, x2, y2); |
---|
| 30 | |
---|
| 31 | edgetextmap[i]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, ""); |
---|
| 32 | edgetextmap[i]->property_fill_color().set_value("black"); |
---|
| 33 | } |
---|
| 34 | |
---|
| 35 | //afterwards nodes come to be drawn |
---|
| 36 | |
---|
| 37 | NodeIt i(g); |
---|
| 38 | int maxx=0, maxy=0, minx=(int)cm[i].x, miny=(int)cm[i].y; |
---|
| 39 | |
---|
| 40 | for (; i!=INVALID; ++i) |
---|
| 41 | { |
---|
| 42 | //minimum and maximum is gathered to be able to zoom to the graph correctly (whole figure should be seen) |
---|
| 43 | |
---|
| 44 | if(cm[i].x>maxx)maxx=(int)cm[i].x; |
---|
| 45 | if(cm[i].y>maxy)maxy=(int)cm[i].y; |
---|
| 46 | if(cm[i].x<minx)minx=(int)cm[i].x; |
---|
| 47 | if(cm[i].y<miny)miny=(int)cm[i].y; |
---|
| 48 | |
---|
| 49 | //drawing bule nodes, with black line around them |
---|
| 50 | |
---|
| 51 | nodesmap[i]=new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20); |
---|
| 52 | *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 53 | *(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black"); |
---|
[9] | 54 | //!!!!!!! (nodesmap[i])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &GraphDisplayerCanvas::event_handler),i)); |
---|
[6] | 55 | } |
---|
| 56 | |
---|
| 57 | updateScrollRegion(); |
---|
| 58 | } |
---|
| 59 | |
---|
| 60 | GraphDisplayerCanvas::~GraphDisplayerCanvas() |
---|
| 61 | { |
---|
| 62 | |
---|
| 63 | //writing out the end state of the graph |
---|
| 64 | //\todo all the maps has to be write out! |
---|
| 65 | |
---|
| 66 | Graph::NodeMap <int> id(g); |
---|
| 67 | Graph::NodeMap <double> xc(g); |
---|
| 68 | Graph::NodeMap <double> yc(g); |
---|
| 69 | |
---|
| 70 | int j=1; |
---|
| 71 | |
---|
| 72 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
| 73 | { |
---|
| 74 | double x1,y1,x2,y2; |
---|
| 75 | nodesmap[i]->get_bounds(x1, y1, x2, y2); |
---|
| 76 | |
---|
| 77 | id[i]=j++; |
---|
| 78 | xc[i]=(x1+x2)/2; |
---|
| 79 | yc[i]=(y1+y2)/2; |
---|
| 80 | } |
---|
| 81 | |
---|
| 82 | GraphWriter<Graph> writer(std::cout,g); |
---|
| 83 | |
---|
| 84 | writer.writeNodeMap("id", id); |
---|
| 85 | writer.writeNodeMap("coordinates_x", xc); |
---|
| 86 | writer.writeNodeMap("coordinates_y", yc); |
---|
| 87 | writer.run(); |
---|
| 88 | } |
---|
| 89 | |
---|
| 90 | int GraphDisplayerCanvas::changeLineWidth (std::string mapname) |
---|
| 91 | { |
---|
| 92 | for (EdgeIt i(g); i!=INVALID; ++i) |
---|
| 93 | { |
---|
| 94 | int w=(int)(*(mapstorage.edgemap_storage)[mapname])[i]; |
---|
| 95 | edgesmap[i]->property_width_pixels().set_value(w); |
---|
| 96 | } |
---|
| 97 | return 0; |
---|
| 98 | }; |
---|
| 99 | |
---|
| 100 | int GraphDisplayerCanvas::changeColor (std::string mapname) |
---|
| 101 | { |
---|
| 102 | |
---|
| 103 | //function maps the range of the maximum and |
---|
| 104 | //the minimum of the nodemap to the range of |
---|
| 105 | //green in RGB |
---|
| 106 | |
---|
| 107 | for (EdgeIt i(g); i!=INVALID; ++i) |
---|
| 108 | { |
---|
| 109 | double w=(*(mapstorage.edgemap_storage)[mapname])[i]; |
---|
| 110 | double max=mapstorage.maxOfEdgeMap(mapname); |
---|
| 111 | double min=mapstorage.minOfEdgeMap(mapname); |
---|
| 112 | |
---|
| 113 | //std::cout<<w<<" "<<max<<" "<<min<<" "<<100*(w-min)/(max-min)<<std::endl; |
---|
| 114 | Gdk::Color color; |
---|
| 115 | if(max!=min) |
---|
| 116 | { |
---|
| 117 | color.set_rgb_p (0, 100*(w-min)/(max-min), 0); |
---|
| 118 | } |
---|
| 119 | else |
---|
| 120 | { |
---|
| 121 | color.set_rgb_p (0, 100, 0); |
---|
| 122 | } |
---|
| 123 | |
---|
| 124 | edgesmap[i]->property_fill_color_gdk().set_value(color); |
---|
| 125 | } |
---|
| 126 | return 0; |
---|
| 127 | }; |
---|
| 128 | |
---|
| 129 | int GraphDisplayerCanvas::changeText (std::string mapname) |
---|
| 130 | { |
---|
| 131 | |
---|
| 132 | //the number in the map will be written on the edge |
---|
| 133 | //EXCEPT when the name of the map is Text, because |
---|
| 134 | //in that case empty string will be written, because |
---|
| 135 | //that is the deleter map |
---|
| 136 | //\todo isn't it a bit woodcutter? |
---|
| 137 | |
---|
| 138 | for (EdgeIt i(g); i!=INVALID; ++i) |
---|
| 139 | { |
---|
| 140 | if(mapname!="Text") |
---|
| 141 | { |
---|
| 142 | double number=(*(mapstorage.edgemap_storage)[mapname])[i]; |
---|
| 143 | int length=(int)(floor(log(number)/log(10)))+1; |
---|
| 144 | int maxpos=(int)(pow(10,length-1)); |
---|
| 145 | int strl=length+1+RANGE; |
---|
| 146 | char * str=new char[strl]; |
---|
| 147 | str[length]='.'; |
---|
| 148 | str[strl]='\0'; |
---|
| 149 | |
---|
| 150 | for(int j=0;j<strl;j++) |
---|
| 151 | { |
---|
| 152 | if(j!=length) |
---|
| 153 | { |
---|
| 154 | int digit=(int)(number/maxpos); |
---|
| 155 | str[j]=(digit+'0'); |
---|
| 156 | number-=digit*maxpos; |
---|
| 157 | number*=10; |
---|
| 158 | } |
---|
| 159 | } |
---|
| 160 | |
---|
| 161 | edgetextmap[i]->property_text().set_value(str); |
---|
| 162 | } |
---|
| 163 | else |
---|
| 164 | { |
---|
| 165 | edgetextmap[i]->property_text().set_value(""); |
---|
| 166 | } |
---|
| 167 | } |
---|
| 168 | return 0; |
---|
| 169 | }; |
---|
| 170 | |
---|
| 171 | bool GraphDisplayerCanvas::event_handler(GdkEvent* e, Node n) |
---|
| 172 | { |
---|
| 173 | switch(e->type) |
---|
| 174 | { |
---|
| 175 | case GDK_BUTTON_PRESS: |
---|
| 176 | //we mark the location of the event to be able to calculate parameters of dragging |
---|
| 177 | clicked_x=e->button.x; |
---|
| 178 | clicked_y=e->button.y; |
---|
| 179 | active_item=(get_item_at(e->button.x, e->button.y)); |
---|
| 180 | isbutton=true; |
---|
| 181 | break; |
---|
| 182 | case GDK_BUTTON_RELEASE: |
---|
| 183 | isbutton=false; |
---|
| 184 | active_item=NULL; |
---|
[7] | 185 | updateScrollRegion(); |
---|
[6] | 186 | break; |
---|
| 187 | case GDK_MOTION_NOTIFY: |
---|
| 188 | //we only have to do sg. if the mouse button is pressed |
---|
| 189 | if(isbutton) |
---|
| 190 | { |
---|
| 191 | //new coordinates will be the old values, |
---|
| 192 | //because the item will be moved to the |
---|
| 193 | //new coordinate therefore the new movement |
---|
| 194 | //has to be calculated from here |
---|
| 195 | |
---|
| 196 | double dx=e->motion.x-clicked_x; |
---|
| 197 | double dy=e->motion.y-clicked_y; |
---|
| 198 | active_item->move(dx, dy); |
---|
| 199 | clicked_x=e->motion.x; |
---|
| 200 | clicked_y=e->motion.y; |
---|
| 201 | |
---|
| 202 | //all the edges connected to the moved point has to be redrawn |
---|
| 203 | |
---|
| 204 | EdgeIt e; |
---|
| 205 | g.firstOut(e,n); |
---|
| 206 | for(;e!=INVALID;g.nextOut(e)) |
---|
| 207 | { |
---|
| 208 | Gnome::Canvas::Points coos; |
---|
| 209 | double x1, x2, y1, y2; |
---|
| 210 | |
---|
| 211 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 212 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 213 | |
---|
| 214 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 215 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 216 | |
---|
| 217 | edgesmap[e]->property_points().set_value(coos); |
---|
| 218 | |
---|
| 219 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
---|
| 220 | |
---|
| 221 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
---|
| 222 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
---|
| 223 | } |
---|
| 224 | |
---|
| 225 | g.firstIn(e,n); |
---|
| 226 | for(;e!=INVALID;g.nextIn(e)) |
---|
| 227 | { |
---|
| 228 | Gnome::Canvas::Points coos; |
---|
| 229 | double x1, x2, y1, y2; |
---|
| 230 | |
---|
| 231 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 232 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 233 | |
---|
| 234 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 235 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 236 | |
---|
| 237 | edgesmap[e]->property_points().set_value(coos); |
---|
| 238 | |
---|
| 239 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
---|
| 240 | |
---|
| 241 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
---|
| 242 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
---|
| 243 | } |
---|
| 244 | } |
---|
| 245 | default: break; |
---|
| 246 | } |
---|
| 247 | return true; |
---|
| 248 | } |
---|
| 249 | |
---|
| 250 | bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event) |
---|
| 251 | { |
---|
| 252 | Gnome::Canvas::CanvasAA::on_expose_event(event); |
---|
| 253 | //usleep(10000); |
---|
| 254 | //rezoom(); |
---|
| 255 | return true; |
---|
| 256 | } |
---|
| 257 | |
---|
| 258 | void GraphDisplayerCanvas::zoomIn() |
---|
| 259 | { |
---|
| 260 | set_pixels_per_unit( |
---|
| 261 | (1.0 + (double) zoom_step / 100.0) * get_pixels_per_unit()); |
---|
| 262 | } |
---|
| 263 | |
---|
| 264 | void GraphDisplayerCanvas::zoomOut() |
---|
| 265 | { |
---|
| 266 | set_pixels_per_unit( |
---|
| 267 | (1.0 - (double) zoom_step / 100.0) * get_pixels_per_unit()); |
---|
| 268 | } |
---|
| 269 | |
---|
| 270 | void GraphDisplayerCanvas::zoomFit() |
---|
| 271 | { |
---|
| 272 | // get the height and width of the canvas |
---|
| 273 | Gtk::Allocation a = get_allocation(); |
---|
| 274 | int aw = a.get_width(); |
---|
| 275 | int ah = a.get_height(); |
---|
| 276 | // add some space |
---|
| 277 | aw -= 5; if (aw < 0) aw = 0; |
---|
| 278 | ah -= 5; if (ah < 0) ah = 0; |
---|
| 279 | |
---|
| 280 | // get the bounding box of the graph |
---|
| 281 | double wx1, wy1, wx2, wy2; |
---|
| 282 | Gnome::Canvas::Item* pCanvasItem = root(); |
---|
| 283 | pCanvasItem->get_bounds(wx1, wy1, wx2, wy2); |
---|
| 284 | |
---|
| 285 | // fit the graph to the window |
---|
[7] | 286 | double ppu1 = (double) aw / fabs(wx2 - wx1); |
---|
| 287 | double ppu2 = (double) ah / fabs(wy2 - wy1); |
---|
| 288 | set_pixels_per_unit((ppu1 < ppu2) ? ppu1 : ppu2); |
---|
[6] | 289 | } |
---|
| 290 | |
---|
| 291 | void GraphDisplayerCanvas::zoom100() |
---|
| 292 | { |
---|
| 293 | set_pixels_per_unit(1.0); |
---|
| 294 | } |
---|
| 295 | |
---|
| 296 | void GraphDisplayerCanvas::updateScrollRegion() |
---|
| 297 | { |
---|
| 298 | double wx1, wy1, wx2, wy2; |
---|
| 299 | Gnome::Canvas::Item* pCanvasItem = root(); |
---|
| 300 | pCanvasItem->get_bounds(wx1, wy1, wx2, wy2); |
---|
[7] | 301 | set_scroll_region(wx1, wy1, wx2, wy2); |
---|
[6] | 302 | } |
---|
[9] | 303 | |
---|
| 304 | void GraphDisplayerCanvas::changeEditorialTool(int newtool) |
---|
| 305 | { |
---|
| 306 | actual_handler.disconnect(); |
---|
| 307 | |
---|
| 308 | switch(newtool) |
---|
| 309 | { |
---|
| 310 | case MOVE: |
---|
| 311 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::move_event_handler), false); |
---|
| 312 | break; |
---|
| 313 | case CREATE_NODE: |
---|
| 314 | actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_node_event_handler), false); |
---|
| 315 | break; |
---|
| 316 | case CREATE_EDGE: |
---|
| 317 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false); |
---|
| 318 | break; |
---|
| 319 | default: |
---|
| 320 | break; |
---|
| 321 | } |
---|
| 322 | } |
---|
| 323 | |
---|
| 324 | bool GraphDisplayerCanvas::move_event_handler(GdkEvent* e) |
---|
| 325 | { |
---|
| 326 | switch(e->type) |
---|
| 327 | { |
---|
| 328 | case GDK_BUTTON_PRESS: |
---|
| 329 | //we mark the location of the event to be able to calculate parameters of dragging |
---|
| 330 | clicked_x=e->button.x; |
---|
| 331 | clicked_y=e->button.y; |
---|
| 332 | active_item=(get_item_at(e->button.x, e->button.y)); |
---|
| 333 | active_node=INVALID; |
---|
| 334 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
| 335 | { |
---|
| 336 | if(nodesmap[i]==active_item) |
---|
| 337 | { |
---|
| 338 | active_node=i; |
---|
| 339 | } |
---|
| 340 | } |
---|
| 341 | isbutton=true; |
---|
| 342 | break; |
---|
| 343 | case GDK_BUTTON_RELEASE: |
---|
| 344 | isbutton=false; |
---|
| 345 | active_item=NULL; |
---|
| 346 | updateScrollRegion(); |
---|
| 347 | break; |
---|
| 348 | case GDK_MOTION_NOTIFY: |
---|
| 349 | //we only have to do sg. if the mouse button is pressed |
---|
| 350 | if(isbutton) |
---|
| 351 | { |
---|
| 352 | //new coordinates will be the old values, |
---|
| 353 | //because the item will be moved to the |
---|
| 354 | //new coordinate therefore the new movement |
---|
| 355 | //has to be calculated from here |
---|
| 356 | |
---|
| 357 | double dx=e->motion.x-clicked_x; |
---|
| 358 | double dy=e->motion.y-clicked_y; |
---|
| 359 | |
---|
| 360 | active_item->move(dx, dy); |
---|
| 361 | |
---|
| 362 | clicked_x=e->motion.x; |
---|
| 363 | clicked_y=e->motion.y; |
---|
| 364 | |
---|
| 365 | //all the edges connected to the moved point has to be redrawn |
---|
| 366 | EdgeIt e; |
---|
| 367 | |
---|
| 368 | g.firstOut(e,active_node); |
---|
| 369 | |
---|
| 370 | for(;e!=INVALID;g.nextOut(e)) |
---|
| 371 | { |
---|
| 372 | Gnome::Canvas::Points coos; |
---|
| 373 | double x1, x2, y1, y2; |
---|
| 374 | |
---|
| 375 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 376 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 377 | |
---|
| 378 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 379 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 380 | |
---|
| 381 | edgesmap[e]->property_points().set_value(coos); |
---|
| 382 | |
---|
| 383 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
---|
| 384 | |
---|
| 385 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
---|
| 386 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
---|
| 387 | } |
---|
| 388 | |
---|
| 389 | g.firstIn(e,active_node); |
---|
| 390 | for(;e!=INVALID;g.nextIn(e)) |
---|
| 391 | { |
---|
| 392 | Gnome::Canvas::Points coos; |
---|
| 393 | double x1, x2, y1, y2; |
---|
| 394 | |
---|
| 395 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 396 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 397 | |
---|
| 398 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
---|
| 399 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 400 | |
---|
| 401 | edgesmap[e]->property_points().set_value(coos); |
---|
| 402 | |
---|
| 403 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
---|
| 404 | |
---|
| 405 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
---|
| 406 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
---|
| 407 | } |
---|
| 408 | } |
---|
| 409 | default: break; |
---|
| 410 | } |
---|
| 411 | |
---|
| 412 | return true; |
---|
| 413 | } |
---|
| 414 | |
---|
| 415 | bool GraphDisplayerCanvas::create_node_event_handler(GdkEvent* e) |
---|
| 416 | { |
---|
| 417 | switch(e->type) |
---|
| 418 | { |
---|
| 419 | case GDK_BUTTON_PRESS: |
---|
| 420 | isbutton=true; |
---|
| 421 | |
---|
| 422 | active_node=NodeIt(g,g.addNode()); |
---|
| 423 | |
---|
| 424 | window_to_world (e->button.x, e->button.y, clicked_x, clicked_y); |
---|
| 425 | |
---|
| 426 | nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph, clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20); |
---|
| 427 | active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]); |
---|
| 428 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red"); |
---|
| 429 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::outline_color("black"); |
---|
| 430 | (nodesmap[active_node])->show(); |
---|
| 431 | break; |
---|
| 432 | case GDK_MOTION_NOTIFY: |
---|
| 433 | { |
---|
| 434 | double world_motion_x, world_motion_y; |
---|
| 435 | GdkEvent * generated=new GdkEvent(); |
---|
| 436 | window_to_world (e->motion.x, e->motion.y, world_motion_x, world_motion_y); |
---|
| 437 | generated->motion.x=world_motion_x; |
---|
| 438 | generated->motion.y=world_motion_y; |
---|
| 439 | generated->type=GDK_MOTION_NOTIFY; |
---|
| 440 | move_event_handler(generated); |
---|
| 441 | break; |
---|
| 442 | } |
---|
| 443 | case GDK_BUTTON_RELEASE: |
---|
| 444 | isbutton=false; |
---|
| 445 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 446 | active_item=NULL; |
---|
| 447 | updateScrollRegion(); |
---|
| 448 | break; |
---|
| 449 | default: |
---|
| 450 | break; |
---|
| 451 | } |
---|
| 452 | return false; |
---|
| 453 | } |
---|
| 454 | |
---|
| 455 | bool GraphDisplayerCanvas::create_edge_event_handler(GdkEvent* e) |
---|
| 456 | { |
---|
[11] | 457 | switch(e->type) |
---|
| 458 | { |
---|
| 459 | case GDK_BUTTON_PRESS: |
---|
| 460 | if(!active_item) |
---|
| 461 | { |
---|
| 462 | //we mark the location of the event to be able to calculate parameters of dragging |
---|
| 463 | clicked_x=e->button.x; |
---|
| 464 | clicked_y=e->button.y; |
---|
| 465 | active_item=(get_item_at(e->button.x, e->button.y)); |
---|
| 466 | active_node=INVALID; |
---|
| 467 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
| 468 | { |
---|
| 469 | if(nodesmap[i]==active_item) |
---|
| 470 | { |
---|
| 471 | active_node=i; |
---|
| 472 | } |
---|
| 473 | } |
---|
| 474 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red"); |
---|
| 475 | isbutton=true; |
---|
| 476 | } |
---|
| 477 | else |
---|
| 478 | { |
---|
| 479 | target_item=(get_item_at(e->button.x, e->button.y)); |
---|
| 480 | Graph::NodeIt target_node=INVALID; |
---|
| 481 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
| 482 | { |
---|
| 483 | if(nodesmap[i]==target_item) |
---|
| 484 | { |
---|
| 485 | target_node=i; |
---|
| 486 | } |
---|
| 487 | } |
---|
| 488 | *(nodesmap[target_node]) << Gnome::Canvas::Properties::fill_color("red"); |
---|
| 489 | |
---|
| 490 | //creating new edge |
---|
| 491 | // Graph::Edge new_edge=g.addEdge(active_node, target_node); |
---|
| 492 | active_edge=EdgeIt(g,g.addEdge(active_node, target_node)); |
---|
| 493 | |
---|
| 494 | //calculating coordinates of new edge |
---|
| 495 | Gnome::Canvas::Points coos; |
---|
| 496 | double x1, x2, y1, y2; |
---|
| 497 | |
---|
| 498 | active_item->get_bounds(x1, y1, x2, y2); |
---|
| 499 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 500 | |
---|
| 501 | target_item->get_bounds(x1, y1, x2, y2); |
---|
| 502 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 503 | |
---|
| 504 | //drawing new edge |
---|
| 505 | edgesmap[active_edge]=new Gnome::Canvas::Line(displayed_graph, coos); |
---|
| 506 | *(edgesmap[active_edge]) << Gnome::Canvas::Properties::fill_color("green"); |
---|
| 507 | edgesmap[active_edge]->property_width_pixels().set_value(10); |
---|
| 508 | |
---|
| 509 | //redraw nodes to blank terminations of the new edge |
---|
| 510 | target_item->raise_to_top(); |
---|
| 511 | active_item->raise_to_top(); |
---|
| 512 | |
---|
| 513 | //initializing edge-text as well, to empty string |
---|
| 514 | edgesmap[active_edge]->get_bounds(x1, y1, x2, y2); |
---|
| 515 | edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, ""); |
---|
| 516 | edgetextmap[active_edge]->property_fill_color().set_value("black"); |
---|
| 517 | } |
---|
| 518 | break; |
---|
| 519 | case GDK_BUTTON_RELEASE: |
---|
| 520 | isbutton=false; |
---|
| 521 | if(target_item) |
---|
| 522 | { |
---|
| 523 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 524 | *target_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 525 | active_item=NULL; |
---|
| 526 | target_item=NULL; |
---|
| 527 | } |
---|
| 528 | break; |
---|
| 529 | default: |
---|
| 530 | break; |
---|
| 531 | } |
---|
[9] | 532 | return false; |
---|
| 533 | } |
---|
| 534 | |
---|