[6] | 1 | #include <graph_displayer_canvas.h> |
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[17] | 2 | #include <broken_edge.h> |
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[6] | 3 | #include <math.h> |
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| 4 | |
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[11] | 5 | 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) |
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[6] | 6 | { |
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[9] | 7 | |
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[11] | 8 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false); |
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[9] | 9 | |
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[12] | 10 | active_node=INVALID; |
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| 11 | active_edge=INVALID; |
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| 12 | |
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[6] | 13 | //set_center_scroll_region(true); |
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| 14 | |
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| 15 | //first edges are drawn, to hide joining with nodes later |
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| 16 | |
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| 17 | for (EdgeIt i(g); i!=INVALID; ++i) |
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| 18 | { |
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| 19 | |
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| 20 | //drawing green lines, coordinates are from cm |
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| 21 | |
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| 22 | Gnome::Canvas::Points coos; |
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| 23 | coos.push_back(Gnome::Art::Point(cm[g.source(i)].x,cm[g.source(i)].y)); |
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| 24 | coos.push_back(Gnome::Art::Point(cm[g.target(i)].x,cm[g.target(i)].y)); |
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| 25 | |
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[17] | 26 | edgesmap[i]=new BrokenEdge(displayed_graph, coos); |
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[6] | 27 | *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green"); |
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| 28 | edgesmap[i]->property_width_pixels().set_value(10); |
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| 29 | |
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| 30 | //initializing edge-text as well, to empty string |
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| 31 | |
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| 32 | double x1, x2, y1, y2; |
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| 33 | edgesmap[i]->get_bounds(x1, y1, x2, y2); |
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| 34 | |
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| 35 | edgetextmap[i]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, ""); |
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| 36 | edgetextmap[i]->property_fill_color().set_value("black"); |
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| 37 | } |
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| 38 | |
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| 39 | //afterwards nodes come to be drawn |
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| 40 | |
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| 41 | NodeIt i(g); |
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| 42 | int maxx=0, maxy=0, minx=(int)cm[i].x, miny=(int)cm[i].y; |
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| 43 | |
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| 44 | for (; i!=INVALID; ++i) |
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| 45 | { |
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| 46 | //minimum and maximum is gathered to be able to zoom to the graph correctly (whole figure should be seen) |
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| 47 | |
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| 48 | if(cm[i].x>maxx)maxx=(int)cm[i].x; |
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| 49 | if(cm[i].y>maxy)maxy=(int)cm[i].y; |
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| 50 | if(cm[i].x<minx)minx=(int)cm[i].x; |
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| 51 | if(cm[i].y<miny)miny=(int)cm[i].y; |
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| 52 | |
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| 53 | //drawing bule nodes, with black line around them |
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| 54 | |
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| 55 | nodesmap[i]=new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20); |
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| 56 | *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue"); |
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| 57 | *(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black"); |
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[9] | 58 | //!!!!!!! (nodesmap[i])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &GraphDisplayerCanvas::event_handler),i)); |
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[6] | 59 | } |
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| 60 | |
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| 61 | updateScrollRegion(); |
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| 62 | } |
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| 63 | |
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| 64 | GraphDisplayerCanvas::~GraphDisplayerCanvas() |
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| 65 | { |
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| 66 | |
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| 67 | //writing out the end state of the graph |
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| 68 | //\todo all the maps has to be write out! |
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| 69 | |
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| 70 | Graph::NodeMap <int> id(g); |
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| 71 | Graph::NodeMap <double> xc(g); |
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| 72 | Graph::NodeMap <double> yc(g); |
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| 73 | |
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| 74 | int j=1; |
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| 75 | |
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| 76 | for (NodeIt i(g); i!=INVALID; ++i) |
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| 77 | { |
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| 78 | double x1,y1,x2,y2; |
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| 79 | nodesmap[i]->get_bounds(x1, y1, x2, y2); |
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| 80 | |
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| 81 | id[i]=j++; |
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| 82 | xc[i]=(x1+x2)/2; |
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| 83 | yc[i]=(y1+y2)/2; |
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| 84 | } |
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| 85 | |
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| 86 | GraphWriter<Graph> writer(std::cout,g); |
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| 87 | |
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| 88 | writer.writeNodeMap("id", id); |
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| 89 | writer.writeNodeMap("coordinates_x", xc); |
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| 90 | writer.writeNodeMap("coordinates_y", yc); |
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| 91 | writer.run(); |
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| 92 | } |
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| 93 | |
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| 94 | int GraphDisplayerCanvas::changeLineWidth (std::string mapname) |
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| 95 | { |
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| 96 | for (EdgeIt i(g); i!=INVALID; ++i) |
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| 97 | { |
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| 98 | int w=(int)(*(mapstorage.edgemap_storage)[mapname])[i]; |
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| 99 | edgesmap[i]->property_width_pixels().set_value(w); |
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| 100 | } |
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| 101 | return 0; |
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| 102 | }; |
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| 103 | |
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| 104 | int GraphDisplayerCanvas::changeColor (std::string mapname) |
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| 105 | { |
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| 106 | |
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| 107 | //function maps the range of the maximum and |
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| 108 | //the minimum of the nodemap to the range of |
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| 109 | //green in RGB |
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| 110 | |
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| 111 | for (EdgeIt i(g); i!=INVALID; ++i) |
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| 112 | { |
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| 113 | double w=(*(mapstorage.edgemap_storage)[mapname])[i]; |
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| 114 | double max=mapstorage.maxOfEdgeMap(mapname); |
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| 115 | double min=mapstorage.minOfEdgeMap(mapname); |
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| 116 | |
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| 117 | //std::cout<<w<<" "<<max<<" "<<min<<" "<<100*(w-min)/(max-min)<<std::endl; |
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| 118 | Gdk::Color color; |
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| 119 | if(max!=min) |
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| 120 | { |
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| 121 | color.set_rgb_p (0, 100*(w-min)/(max-min), 0); |
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| 122 | } |
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| 123 | else |
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| 124 | { |
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| 125 | color.set_rgb_p (0, 100, 0); |
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| 126 | } |
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| 127 | |
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| 128 | edgesmap[i]->property_fill_color_gdk().set_value(color); |
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| 129 | } |
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| 130 | return 0; |
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| 131 | }; |
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| 132 | |
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| 133 | int GraphDisplayerCanvas::changeText (std::string mapname) |
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| 134 | { |
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| 135 | |
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| 136 | //the number in the map will be written on the edge |
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| 137 | //EXCEPT when the name of the map is Text, because |
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| 138 | //in that case empty string will be written, because |
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| 139 | //that is the deleter map |
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| 140 | //\todo isn't it a bit woodcutter? |
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| 141 | |
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| 142 | for (EdgeIt i(g); i!=INVALID; ++i) |
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| 143 | { |
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| 144 | if(mapname!="Text") |
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| 145 | { |
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| 146 | double number=(*(mapstorage.edgemap_storage)[mapname])[i]; |
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| 147 | int length=(int)(floor(log(number)/log(10)))+1; |
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| 148 | int maxpos=(int)(pow(10,length-1)); |
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| 149 | int strl=length+1+RANGE; |
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| 150 | char * str=new char[strl]; |
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| 151 | str[length]='.'; |
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| 152 | str[strl]='\0'; |
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| 153 | |
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| 154 | for(int j=0;j<strl;j++) |
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| 155 | { |
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| 156 | if(j!=length) |
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| 157 | { |
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| 158 | int digit=(int)(number/maxpos); |
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| 159 | str[j]=(digit+'0'); |
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| 160 | number-=digit*maxpos; |
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| 161 | number*=10; |
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| 162 | } |
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| 163 | } |
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| 164 | |
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| 165 | edgetextmap[i]->property_text().set_value(str); |
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| 166 | } |
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| 167 | else |
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| 168 | { |
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| 169 | edgetextmap[i]->property_text().set_value(""); |
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| 170 | } |
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| 171 | } |
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| 172 | return 0; |
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| 173 | }; |
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| 174 | |
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| 175 | bool GraphDisplayerCanvas::event_handler(GdkEvent* e, Node n) |
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| 176 | { |
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| 177 | switch(e->type) |
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| 178 | { |
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| 179 | case GDK_BUTTON_PRESS: |
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| 180 | //we mark the location of the event to be able to calculate parameters of dragging |
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| 181 | clicked_x=e->button.x; |
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| 182 | clicked_y=e->button.y; |
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| 183 | active_item=(get_item_at(e->button.x, e->button.y)); |
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| 184 | isbutton=true; |
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| 185 | break; |
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| 186 | case GDK_BUTTON_RELEASE: |
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| 187 | isbutton=false; |
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| 188 | active_item=NULL; |
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[7] | 189 | updateScrollRegion(); |
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[6] | 190 | break; |
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| 191 | case GDK_MOTION_NOTIFY: |
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| 192 | //we only have to do sg. if the mouse button is pressed |
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| 193 | if(isbutton) |
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| 194 | { |
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| 195 | //new coordinates will be the old values, |
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| 196 | //because the item will be moved to the |
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| 197 | //new coordinate therefore the new movement |
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| 198 | //has to be calculated from here |
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| 199 | |
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| 200 | double dx=e->motion.x-clicked_x; |
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| 201 | double dy=e->motion.y-clicked_y; |
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| 202 | active_item->move(dx, dy); |
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| 203 | clicked_x=e->motion.x; |
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| 204 | clicked_y=e->motion.y; |
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| 205 | |
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| 206 | //all the edges connected to the moved point has to be redrawn |
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| 207 | |
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| 208 | EdgeIt e; |
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| 209 | g.firstOut(e,n); |
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| 210 | for(;e!=INVALID;g.nextOut(e)) |
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| 211 | { |
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| 212 | Gnome::Canvas::Points coos; |
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| 213 | double x1, x2, y1, y2; |
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| 214 | |
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| 215 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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| 216 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 217 | |
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| 218 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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| 219 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 220 | |
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| 221 | edgesmap[e]->property_points().set_value(coos); |
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| 222 | |
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| 223 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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| 224 | |
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| 225 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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| 226 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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| 227 | } |
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| 228 | |
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| 229 | g.firstIn(e,n); |
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| 230 | for(;e!=INVALID;g.nextIn(e)) |
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| 231 | { |
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| 232 | Gnome::Canvas::Points coos; |
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| 233 | double x1, x2, y1, y2; |
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| 234 | |
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| 235 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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| 236 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 237 | |
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| 238 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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| 239 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 240 | |
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| 241 | edgesmap[e]->property_points().set_value(coos); |
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| 242 | |
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| 243 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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| 244 | |
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| 245 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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| 246 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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| 247 | } |
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| 248 | } |
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| 249 | default: break; |
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| 250 | } |
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| 251 | return true; |
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| 252 | } |
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| 253 | |
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| 254 | bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event) |
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| 255 | { |
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| 256 | Gnome::Canvas::CanvasAA::on_expose_event(event); |
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| 257 | //usleep(10000); |
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| 258 | //rezoom(); |
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| 259 | return true; |
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| 260 | } |
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| 261 | |
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| 262 | void GraphDisplayerCanvas::zoomIn() |
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| 263 | { |
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| 264 | set_pixels_per_unit( |
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| 265 | (1.0 + (double) zoom_step / 100.0) * get_pixels_per_unit()); |
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| 266 | } |
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| 267 | |
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| 268 | void GraphDisplayerCanvas::zoomOut() |
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| 269 | { |
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| 270 | set_pixels_per_unit( |
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| 271 | (1.0 - (double) zoom_step / 100.0) * get_pixels_per_unit()); |
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| 272 | } |
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| 273 | |
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| 274 | void GraphDisplayerCanvas::zoomFit() |
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| 275 | { |
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| 276 | // get the height and width of the canvas |
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| 277 | Gtk::Allocation a = get_allocation(); |
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| 278 | int aw = a.get_width(); |
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| 279 | int ah = a.get_height(); |
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| 280 | // add some space |
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| 281 | aw -= 5; if (aw < 0) aw = 0; |
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| 282 | ah -= 5; if (ah < 0) ah = 0; |
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| 283 | |
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| 284 | // get the bounding box of the graph |
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| 285 | double wx1, wy1, wx2, wy2; |
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| 286 | Gnome::Canvas::Item* pCanvasItem = root(); |
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| 287 | pCanvasItem->get_bounds(wx1, wy1, wx2, wy2); |
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| 288 | |
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| 289 | // fit the graph to the window |
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[7] | 290 | double ppu1 = (double) aw / fabs(wx2 - wx1); |
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| 291 | double ppu2 = (double) ah / fabs(wy2 - wy1); |
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| 292 | set_pixels_per_unit((ppu1 < ppu2) ? ppu1 : ppu2); |
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[6] | 293 | } |
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| 294 | |
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| 295 | void GraphDisplayerCanvas::zoom100() |
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| 296 | { |
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| 297 | set_pixels_per_unit(1.0); |
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| 298 | } |
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| 299 | |
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| 300 | void GraphDisplayerCanvas::updateScrollRegion() |
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| 301 | { |
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| 302 | double wx1, wy1, wx2, wy2; |
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| 303 | Gnome::Canvas::Item* pCanvasItem = root(); |
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| 304 | pCanvasItem->get_bounds(wx1, wy1, wx2, wy2); |
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[7] | 305 | set_scroll_region(wx1, wy1, wx2, wy2); |
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[6] | 306 | } |
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[9] | 307 | |
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| 308 | void GraphDisplayerCanvas::changeEditorialTool(int newtool) |
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| 309 | { |
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| 310 | actual_handler.disconnect(); |
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| 311 | |
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| 312 | switch(newtool) |
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| 313 | { |
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| 314 | case MOVE: |
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| 315 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::move_event_handler), false); |
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| 316 | break; |
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[12] | 317 | |
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| 318 | //it has to assigned to canvas, because all the canvas has to be monitored, not only the elements of the already drawn group |
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[9] | 319 | case CREATE_NODE: |
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| 320 | actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_node_event_handler), false); |
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| 321 | break; |
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[12] | 322 | |
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[9] | 323 | case CREATE_EDGE: |
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| 324 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false); |
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| 325 | break; |
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[13] | 326 | |
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| 327 | case ERASER: |
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| 328 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraser_event_handler), false); |
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| 329 | break; |
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| 330 | |
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[9] | 331 | default: |
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| 332 | break; |
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| 333 | } |
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| 334 | } |
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| 335 | |
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| 336 | bool GraphDisplayerCanvas::move_event_handler(GdkEvent* e) |
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| 337 | { |
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| 338 | switch(e->type) |
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| 339 | { |
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| 340 | case GDK_BUTTON_PRESS: |
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| 341 | //we mark the location of the event to be able to calculate parameters of dragging |
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| 342 | clicked_x=e->button.x; |
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| 343 | clicked_y=e->button.y; |
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| 344 | active_item=(get_item_at(e->button.x, e->button.y)); |
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| 345 | active_node=INVALID; |
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| 346 | for (NodeIt i(g); i!=INVALID; ++i) |
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| 347 | { |
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| 348 | if(nodesmap[i]==active_item) |
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| 349 | { |
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| 350 | active_node=i; |
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| 351 | } |
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| 352 | } |
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| 353 | isbutton=true; |
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| 354 | break; |
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| 355 | case GDK_BUTTON_RELEASE: |
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| 356 | isbutton=false; |
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| 357 | active_item=NULL; |
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[12] | 358 | active_node=INVALID; |
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[9] | 359 | updateScrollRegion(); |
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| 360 | break; |
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| 361 | case GDK_MOTION_NOTIFY: |
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[12] | 362 | //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 |
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| 363 | if(active_node!=INVALID) |
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[9] | 364 | { |
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| 365 | //new coordinates will be the old values, |
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| 366 | //because the item will be moved to the |
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| 367 | //new coordinate therefore the new movement |
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| 368 | //has to be calculated from here |
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| 369 | |
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| 370 | double dx=e->motion.x-clicked_x; |
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| 371 | double dy=e->motion.y-clicked_y; |
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| 372 | |
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| 373 | active_item->move(dx, dy); |
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| 374 | |
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| 375 | clicked_x=e->motion.x; |
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| 376 | clicked_y=e->motion.y; |
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| 377 | |
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| 378 | //all the edges connected to the moved point has to be redrawn |
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| 379 | EdgeIt e; |
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| 380 | |
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| 381 | g.firstOut(e,active_node); |
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| 382 | |
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| 383 | for(;e!=INVALID;g.nextOut(e)) |
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| 384 | { |
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| 385 | Gnome::Canvas::Points coos; |
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| 386 | double x1, x2, y1, y2; |
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| 387 | |
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| 388 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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| 389 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 390 | |
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| 391 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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| 392 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 393 | |
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[19] | 394 | edgesmap[e]->set_points(coos); |
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[9] | 395 | |
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| 396 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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| 397 | |
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| 398 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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| 399 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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| 400 | } |
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| 401 | |
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| 402 | g.firstIn(e,active_node); |
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| 403 | for(;e!=INVALID;g.nextIn(e)) |
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| 404 | { |
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| 405 | Gnome::Canvas::Points coos; |
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| 406 | double x1, x2, y1, y2; |
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| 407 | |
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| 408 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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| 409 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 410 | |
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| 411 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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| 412 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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| 413 | |
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[19] | 414 | edgesmap[e]->set_points(coos); |
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[9] | 415 | |
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| 416 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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| 417 | |
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| 418 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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| 419 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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| 420 | } |
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| 421 | } |
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| 422 | default: break; |
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| 423 | } |
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| 424 | |
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| 425 | return true; |
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| 426 | } |
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| 427 | |
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| 428 | bool GraphDisplayerCanvas::create_node_event_handler(GdkEvent* e) |
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| 429 | { |
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| 430 | switch(e->type) |
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| 431 | { |
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[12] | 432 | |
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| 433 | //draw the new node in red at the clicked place |
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[9] | 434 | case GDK_BUTTON_PRESS: |
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| 435 | isbutton=true; |
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| 436 | |
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| 437 | active_node=NodeIt(g,g.addNode()); |
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| 438 | |
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| 439 | window_to_world (e->button.x, e->button.y, clicked_x, clicked_y); |
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| 440 | |
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| 441 | nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph, clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20); |
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| 442 | active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]); |
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| 443 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red"); |
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| 444 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::outline_color("black"); |
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| 445 | (nodesmap[active_node])->show(); |
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| 446 | break; |
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[12] | 447 | |
---|
| 448 | //move the new node |
---|
[9] | 449 | case GDK_MOTION_NOTIFY: |
---|
| 450 | { |
---|
| 451 | double world_motion_x, world_motion_y; |
---|
| 452 | GdkEvent * generated=new GdkEvent(); |
---|
| 453 | window_to_world (e->motion.x, e->motion.y, world_motion_x, world_motion_y); |
---|
| 454 | generated->motion.x=world_motion_x; |
---|
| 455 | generated->motion.y=world_motion_y; |
---|
| 456 | generated->type=GDK_MOTION_NOTIFY; |
---|
| 457 | move_event_handler(generated); |
---|
| 458 | break; |
---|
| 459 | } |
---|
[12] | 460 | |
---|
| 461 | //finalize the new node |
---|
[9] | 462 | case GDK_BUTTON_RELEASE: |
---|
| 463 | isbutton=false; |
---|
| 464 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 465 | active_item=NULL; |
---|
[12] | 466 | active_node=INVALID; |
---|
[9] | 467 | updateScrollRegion(); |
---|
| 468 | break; |
---|
| 469 | default: |
---|
| 470 | break; |
---|
| 471 | } |
---|
| 472 | return false; |
---|
| 473 | } |
---|
| 474 | |
---|
| 475 | bool GraphDisplayerCanvas::create_edge_event_handler(GdkEvent* e) |
---|
| 476 | { |
---|
[11] | 477 | switch(e->type) |
---|
| 478 | { |
---|
| 479 | case GDK_BUTTON_PRESS: |
---|
[12] | 480 | //in edge creatino right button has special meaning |
---|
| 481 | if(e->button.button!=3) |
---|
[11] | 482 | { |
---|
[12] | 483 | //there is not yet selected node |
---|
| 484 | if(active_node==INVALID) |
---|
[11] | 485 | { |
---|
[12] | 486 | //we mark the location of the event to be able to calculate parameters of dragging |
---|
| 487 | clicked_x=e->button.x; |
---|
| 488 | clicked_y=e->button.y; |
---|
| 489 | active_item=(get_item_at(e->button.x, e->button.y)); |
---|
| 490 | active_node=INVALID; |
---|
| 491 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
[11] | 492 | { |
---|
[12] | 493 | if(nodesmap[i]==active_item) |
---|
| 494 | { |
---|
| 495 | active_node=i; |
---|
| 496 | } |
---|
| 497 | } |
---|
| 498 | //the clicked item is really a node |
---|
| 499 | if(active_node!=INVALID) |
---|
| 500 | { |
---|
| 501 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red"); |
---|
| 502 | isbutton=true; |
---|
| 503 | } |
---|
| 504 | //clicked item was not a node. It could be e.g. edge. |
---|
| 505 | else |
---|
| 506 | { |
---|
| 507 | active_item=NULL; |
---|
[11] | 508 | } |
---|
| 509 | } |
---|
[12] | 510 | //we only have to do sg. if the mouse button |
---|
| 511 | // is pressed already once AND the click was |
---|
| 512 | // on a node that was found in the set of |
---|
| 513 | //nodes, and now we only search for the second |
---|
| 514 | //node |
---|
| 515 | else |
---|
[11] | 516 | { |
---|
[12] | 517 | target_item=(get_item_at(e->button.x, e->button.y)); |
---|
| 518 | Graph::NodeIt target_node=INVALID; |
---|
| 519 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
[11] | 520 | { |
---|
[12] | 521 | if(nodesmap[i]==target_item) |
---|
| 522 | { |
---|
| 523 | target_node=i; |
---|
| 524 | } |
---|
| 525 | } |
---|
| 526 | //the clicked item is a node, the edge can be drawn |
---|
| 527 | if(target_node!=INVALID) |
---|
| 528 | { |
---|
| 529 | *(nodesmap[target_node]) << Gnome::Canvas::Properties::fill_color("red"); |
---|
| 530 | |
---|
| 531 | //creating new edge |
---|
| 532 | active_edge=EdgeIt(g,g.addEdge(active_node, target_node)); |
---|
| 533 | |
---|
| 534 | //calculating coordinates of new edge |
---|
| 535 | Gnome::Canvas::Points coos; |
---|
| 536 | double x1, x2, y1, y2; |
---|
| 537 | |
---|
| 538 | active_item->get_bounds(x1, y1, x2, y2); |
---|
| 539 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 540 | |
---|
| 541 | target_item->get_bounds(x1, y1, x2, y2); |
---|
| 542 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
| 543 | |
---|
| 544 | //drawing new edge |
---|
[19] | 545 | edgesmap[active_edge]=new BrokenEdge(displayed_graph, coos); |
---|
[12] | 546 | *(edgesmap[active_edge]) << Gnome::Canvas::Properties::fill_color("green"); |
---|
| 547 | edgesmap[active_edge]->property_width_pixels().set_value(10); |
---|
| 548 | |
---|
| 549 | //redraw nodes to blank terminations of the new edge |
---|
| 550 | target_item->raise_to_top(); |
---|
| 551 | active_item->raise_to_top(); |
---|
| 552 | |
---|
| 553 | //initializing edge-text as well, to empty string |
---|
| 554 | edgesmap[active_edge]->get_bounds(x1, y1, x2, y2); |
---|
| 555 | edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, ""); |
---|
| 556 | edgetextmap[active_edge]->property_fill_color().set_value("black"); |
---|
| 557 | } |
---|
| 558 | //clicked item was not a node. it could be an e.g. edge. we do not deal with it furthermore. |
---|
| 559 | else |
---|
| 560 | { |
---|
| 561 | target_item=NULL; |
---|
[11] | 562 | } |
---|
| 563 | } |
---|
| 564 | } |
---|
| 565 | break; |
---|
| 566 | case GDK_BUTTON_RELEASE: |
---|
| 567 | isbutton=false; |
---|
[12] | 568 | //we clear settings in two cases |
---|
| 569 | //1: the edge is ready (target_item has valid value) |
---|
| 570 | //2: the edge creation is cancelled with right button |
---|
| 571 | if((target_item)||(e->button.button==3)) |
---|
[11] | 572 | { |
---|
[12] | 573 | if(active_item) |
---|
| 574 | { |
---|
| 575 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 576 | active_item=NULL; |
---|
| 577 | } |
---|
| 578 | if(target_item) |
---|
| 579 | { |
---|
| 580 | *target_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 581 | target_item=NULL; |
---|
| 582 | } |
---|
| 583 | active_node=INVALID; |
---|
| 584 | active_edge=INVALID; |
---|
[11] | 585 | } |
---|
| 586 | break; |
---|
| 587 | default: |
---|
| 588 | break; |
---|
| 589 | } |
---|
[9] | 590 | return false; |
---|
| 591 | } |
---|
| 592 | |
---|
[13] | 593 | bool GraphDisplayerCanvas::eraser_event_handler(GdkEvent* e) |
---|
| 594 | { |
---|
| 595 | switch(e->type) |
---|
| 596 | { |
---|
| 597 | case GDK_BUTTON_PRESS: |
---|
| 598 | active_item=(get_item_at(e->button.x, e->button.y)); |
---|
| 599 | active_node=INVALID; |
---|
| 600 | active_edge=INVALID; |
---|
| 601 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
| 602 | { |
---|
| 603 | if(nodesmap[i]==active_item) |
---|
| 604 | { |
---|
| 605 | active_node=i; |
---|
| 606 | } |
---|
| 607 | } |
---|
| 608 | if(active_node==INVALID) |
---|
| 609 | { |
---|
| 610 | for (EdgeIt i(g); i!=INVALID; ++i) |
---|
| 611 | { |
---|
| 612 | if(edgesmap[i]==active_item) |
---|
| 613 | { |
---|
| 614 | active_edge=i; |
---|
| 615 | } |
---|
| 616 | } |
---|
| 617 | } |
---|
| 618 | *active_item << Gnome::Canvas::Properties::fill_color("red"); |
---|
| 619 | break; |
---|
| 620 | |
---|
| 621 | case GDK_BUTTON_RELEASE: |
---|
| 622 | if(active_item==(get_item_at(e->button.x, e->button.y))) |
---|
| 623 | { |
---|
| 624 | if(active_node!=INVALID) |
---|
| 625 | { |
---|
[14] | 626 | |
---|
[16] | 627 | //collecting edges to delete |
---|
| 628 | EdgeIt e; |
---|
| 629 | std::set<Graph::Edge> edges_to_delete; |
---|
| 630 | |
---|
| 631 | g.firstOut(e,active_node); |
---|
| 632 | for(;e!=INVALID;g.nextOut(e)) |
---|
[13] | 633 | { |
---|
[16] | 634 | edges_to_delete.insert(e); |
---|
| 635 | } |
---|
| 636 | |
---|
| 637 | g.firstIn(e,active_node); |
---|
| 638 | for(;e!=INVALID;g.nextIn(e)) |
---|
| 639 | { |
---|
| 640 | edges_to_delete.insert(e); |
---|
| 641 | } |
---|
| 642 | |
---|
| 643 | //deleting collected edges |
---|
| 644 | for(std::set<Graph::Edge>::iterator edge_set_it=edges_to_delete.begin();edge_set_it!=edges_to_delete.end();edge_set_it++) |
---|
| 645 | { |
---|
| 646 | delete_item(*edge_set_it); |
---|
[13] | 647 | } |
---|
[14] | 648 | delete_item(active_node); |
---|
| 649 | } |
---|
[16] | 650 | //a simple edge was chosen |
---|
[14] | 651 | else |
---|
| 652 | { |
---|
| 653 | delete_item(active_edge); |
---|
| 654 | } |
---|
[13] | 655 | |
---|
| 656 | |
---|
| 657 | } |
---|
[16] | 658 | //pointer was moved, deletion is cancelled |
---|
[13] | 659 | else |
---|
| 660 | { |
---|
| 661 | if(active_node!=INVALID) |
---|
| 662 | { |
---|
| 663 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
| 664 | } |
---|
| 665 | else |
---|
| 666 | { |
---|
| 667 | *active_item << Gnome::Canvas::Properties::fill_color("green"); |
---|
| 668 | } |
---|
| 669 | } |
---|
[16] | 670 | //reseting datas |
---|
[13] | 671 | active_item=NULL; |
---|
| 672 | active_edge=INVALID; |
---|
| 673 | active_node=INVALID; |
---|
| 674 | break; |
---|
| 675 | |
---|
| 676 | case GDK_MOTION_NOTIFY: |
---|
| 677 | break; |
---|
| 678 | |
---|
| 679 | default: |
---|
| 680 | break; |
---|
| 681 | } |
---|
| 682 | return true; |
---|
| 683 | } |
---|
| 684 | |
---|
[14] | 685 | void GraphDisplayerCanvas::delete_item(NodeIt node_to_delete) |
---|
[13] | 686 | { |
---|
[14] | 687 | delete(nodesmap[node_to_delete]); |
---|
| 688 | g.erase(node_to_delete); |
---|
[13] | 689 | } |
---|
| 690 | |
---|
[14] | 691 | void GraphDisplayerCanvas::delete_item(EdgeIt edge_to_delete) |
---|
| 692 | { |
---|
| 693 | delete(edgesmap[edge_to_delete]); |
---|
| 694 | g.erase(edge_to_delete); |
---|
| 695 | } |
---|
| 696 | |
---|
[16] | 697 | void GraphDisplayerCanvas::delete_item(Graph::Edge edge_to_delete) |
---|
| 698 | { |
---|
| 699 | delete(edgesmap[edge_to_delete]); |
---|
| 700 | g.erase(edge_to_delete); |
---|
| 701 | } |
---|
| 702 | |
---|