1 | #include <graph_displayer_canvas.h> |
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2 | #include <broken_edge.h> |
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3 | #include <math.h> |
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4 | |
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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 | { |
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7 | |
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8 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false); |
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9 | |
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10 | active_node=INVALID; |
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11 | active_edge=INVALID; |
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12 | |
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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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26 | //edgesmap[i]=new Gnome::Canvas::Line(displayed_graph, coos); |
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27 | edgesmap[i]=new BrokenEdge(displayed_graph, coos); |
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28 | *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green"); |
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29 | edgesmap[i]->property_width_pixels().set_value(10); |
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30 | |
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31 | //initializing edge-text as well, to empty string |
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32 | |
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33 | double x1, x2, y1, y2; |
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34 | edgesmap[i]->get_bounds(x1, y1, x2, y2); |
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35 | |
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36 | edgetextmap[i]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, ""); |
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37 | edgetextmap[i]->property_fill_color().set_value("black"); |
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38 | } |
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39 | |
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40 | //afterwards nodes come to be drawn |
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41 | |
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42 | NodeIt i(g); |
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43 | int maxx=0, maxy=0, minx=(int)cm[i].x, miny=(int)cm[i].y; |
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44 | |
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45 | for (; i!=INVALID; ++i) |
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46 | { |
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47 | //minimum and maximum is gathered to be able to zoom to the graph correctly (whole figure should be seen) |
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48 | |
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49 | if(cm[i].x>maxx)maxx=(int)cm[i].x; |
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50 | if(cm[i].y>maxy)maxy=(int)cm[i].y; |
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51 | if(cm[i].x<minx)minx=(int)cm[i].x; |
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52 | if(cm[i].y<miny)miny=(int)cm[i].y; |
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53 | |
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54 | //drawing bule nodes, with black line around them |
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55 | |
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56 | 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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57 | *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue"); |
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58 | *(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black"); |
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59 | //!!!!!!! (nodesmap[i])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &GraphDisplayerCanvas::event_handler),i)); |
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60 | } |
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61 | |
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62 | updateScrollRegion(); |
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63 | } |
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64 | |
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65 | GraphDisplayerCanvas::~GraphDisplayerCanvas() |
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66 | { |
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67 | |
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68 | //writing out the end state of the graph |
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69 | //\todo all the maps has to be write out! |
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70 | |
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71 | Graph::NodeMap <int> id(g); |
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72 | Graph::NodeMap <double> xc(g); |
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73 | Graph::NodeMap <double> yc(g); |
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74 | |
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75 | int j=1; |
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76 | |
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77 | for (NodeIt i(g); i!=INVALID; ++i) |
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78 | { |
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79 | double x1,y1,x2,y2; |
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80 | nodesmap[i]->get_bounds(x1, y1, x2, y2); |
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81 | |
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82 | id[i]=j++; |
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83 | xc[i]=(x1+x2)/2; |
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84 | yc[i]=(y1+y2)/2; |
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85 | } |
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86 | |
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87 | GraphWriter<Graph> writer(std::cout,g); |
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88 | |
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89 | writer.writeNodeMap("id", id); |
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90 | writer.writeNodeMap("coordinates_x", xc); |
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91 | writer.writeNodeMap("coordinates_y", yc); |
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92 | writer.run(); |
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93 | } |
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94 | |
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95 | int GraphDisplayerCanvas::changeLineWidth (std::string mapname) |
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96 | { |
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97 | for (EdgeIt i(g); i!=INVALID; ++i) |
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98 | { |
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99 | int w=(int)(*(mapstorage.edgemap_storage)[mapname])[i]; |
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100 | edgesmap[i]->property_width_pixels().set_value(w); |
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101 | } |
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102 | return 0; |
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103 | }; |
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104 | |
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105 | int GraphDisplayerCanvas::changeColor (std::string mapname) |
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106 | { |
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107 | |
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108 | //function maps the range of the maximum and |
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109 | //the minimum of the nodemap to the range of |
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110 | //green in RGB |
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111 | |
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112 | for (EdgeIt i(g); i!=INVALID; ++i) |
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113 | { |
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114 | double w=(*(mapstorage.edgemap_storage)[mapname])[i]; |
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115 | double max=mapstorage.maxOfEdgeMap(mapname); |
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116 | double min=mapstorage.minOfEdgeMap(mapname); |
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117 | |
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118 | //std::cout<<w<<" "<<max<<" "<<min<<" "<<100*(w-min)/(max-min)<<std::endl; |
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119 | Gdk::Color color; |
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120 | if(max!=min) |
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121 | { |
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122 | color.set_rgb_p (0, 100*(w-min)/(max-min), 0); |
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123 | } |
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124 | else |
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125 | { |
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126 | color.set_rgb_p (0, 100, 0); |
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127 | } |
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128 | |
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129 | edgesmap[i]->property_fill_color_gdk().set_value(color); |
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130 | } |
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131 | return 0; |
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132 | }; |
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133 | |
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134 | int GraphDisplayerCanvas::changeText (std::string mapname) |
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135 | { |
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136 | |
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137 | //the number in the map will be written on the edge |
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138 | //EXCEPT when the name of the map is Text, because |
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139 | //in that case empty string will be written, because |
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140 | //that is the deleter map |
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141 | //\todo isn't it a bit woodcutter? |
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142 | |
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143 | for (EdgeIt i(g); i!=INVALID; ++i) |
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144 | { |
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145 | if(mapname!="Text") |
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146 | { |
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147 | double number=(*(mapstorage.edgemap_storage)[mapname])[i]; |
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148 | int length=(int)(floor(log(number)/log(10)))+1; |
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149 | int maxpos=(int)(pow(10,length-1)); |
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150 | int strl=length+1+RANGE; |
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151 | char * str=new char[strl]; |
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152 | str[length]='.'; |
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153 | str[strl]='\0'; |
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154 | |
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155 | for(int j=0;j<strl;j++) |
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156 | { |
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157 | if(j!=length) |
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158 | { |
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159 | int digit=(int)(number/maxpos); |
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160 | str[j]=(digit+'0'); |
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161 | number-=digit*maxpos; |
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162 | number*=10; |
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163 | } |
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164 | } |
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165 | |
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166 | edgetextmap[i]->property_text().set_value(str); |
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167 | } |
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168 | else |
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169 | { |
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170 | edgetextmap[i]->property_text().set_value(""); |
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171 | } |
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172 | } |
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173 | return 0; |
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174 | }; |
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175 | |
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176 | bool GraphDisplayerCanvas::event_handler(GdkEvent* e, Node n) |
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177 | { |
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178 | switch(e->type) |
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179 | { |
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180 | case GDK_BUTTON_PRESS: |
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181 | //we mark the location of the event to be able to calculate parameters of dragging |
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182 | clicked_x=e->button.x; |
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183 | clicked_y=e->button.y; |
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184 | active_item=(get_item_at(e->button.x, e->button.y)); |
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185 | isbutton=true; |
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186 | break; |
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187 | case GDK_BUTTON_RELEASE: |
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188 | isbutton=false; |
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189 | active_item=NULL; |
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190 | updateScrollRegion(); |
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191 | break; |
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192 | case GDK_MOTION_NOTIFY: |
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193 | //we only have to do sg. if the mouse button is pressed |
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194 | if(isbutton) |
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195 | { |
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196 | //new coordinates will be the old values, |
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197 | //because the item will be moved to the |
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198 | //new coordinate therefore the new movement |
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199 | //has to be calculated from here |
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200 | |
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201 | double dx=e->motion.x-clicked_x; |
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202 | double dy=e->motion.y-clicked_y; |
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203 | active_item->move(dx, dy); |
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204 | clicked_x=e->motion.x; |
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205 | clicked_y=e->motion.y; |
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206 | |
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207 | //all the edges connected to the moved point has to be redrawn |
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208 | |
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209 | EdgeIt e; |
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210 | g.firstOut(e,n); |
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211 | for(;e!=INVALID;g.nextOut(e)) |
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212 | { |
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213 | Gnome::Canvas::Points coos; |
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214 | double x1, x2, y1, y2; |
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215 | |
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216 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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217 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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218 | |
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219 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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220 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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221 | |
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222 | edgesmap[e]->property_points().set_value(coos); |
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223 | |
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224 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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225 | |
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226 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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227 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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228 | } |
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229 | |
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230 | g.firstIn(e,n); |
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231 | for(;e!=INVALID;g.nextIn(e)) |
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232 | { |
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233 | Gnome::Canvas::Points coos; |
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234 | double x1, x2, y1, y2; |
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235 | |
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236 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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237 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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238 | |
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239 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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240 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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241 | |
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242 | edgesmap[e]->property_points().set_value(coos); |
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243 | |
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244 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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245 | |
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246 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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247 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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248 | } |
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249 | } |
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250 | default: break; |
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251 | } |
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252 | return true; |
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253 | } |
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254 | |
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255 | bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event) |
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256 | { |
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257 | Gnome::Canvas::CanvasAA::on_expose_event(event); |
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258 | //usleep(10000); |
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259 | //rezoom(); |
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260 | return true; |
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261 | } |
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262 | |
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263 | void GraphDisplayerCanvas::zoomIn() |
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264 | { |
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265 | set_pixels_per_unit( |
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266 | (1.0 + (double) zoom_step / 100.0) * get_pixels_per_unit()); |
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267 | } |
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268 | |
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269 | void GraphDisplayerCanvas::zoomOut() |
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270 | { |
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271 | set_pixels_per_unit( |
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272 | (1.0 - (double) zoom_step / 100.0) * get_pixels_per_unit()); |
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273 | } |
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274 | |
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275 | void GraphDisplayerCanvas::zoomFit() |
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276 | { |
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277 | // get the height and width of the canvas |
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278 | Gtk::Allocation a = get_allocation(); |
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279 | int aw = a.get_width(); |
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280 | int ah = a.get_height(); |
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281 | // add some space |
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282 | aw -= 5; if (aw < 0) aw = 0; |
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283 | ah -= 5; if (ah < 0) ah = 0; |
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284 | |
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285 | // get the bounding box of the graph |
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286 | double wx1, wy1, wx2, wy2; |
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287 | Gnome::Canvas::Item* pCanvasItem = root(); |
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288 | pCanvasItem->get_bounds(wx1, wy1, wx2, wy2); |
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289 | |
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290 | // fit the graph to the window |
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291 | double ppu1 = (double) aw / fabs(wx2 - wx1); |
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292 | double ppu2 = (double) ah / fabs(wy2 - wy1); |
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293 | set_pixels_per_unit((ppu1 < ppu2) ? ppu1 : ppu2); |
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294 | } |
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295 | |
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296 | void GraphDisplayerCanvas::zoom100() |
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297 | { |
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298 | set_pixels_per_unit(1.0); |
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299 | } |
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300 | |
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301 | void GraphDisplayerCanvas::updateScrollRegion() |
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302 | { |
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303 | double wx1, wy1, wx2, wy2; |
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304 | Gnome::Canvas::Item* pCanvasItem = root(); |
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305 | pCanvasItem->get_bounds(wx1, wy1, wx2, wy2); |
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306 | set_scroll_region(wx1, wy1, wx2, wy2); |
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307 | } |
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308 | |
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309 | void GraphDisplayerCanvas::changeEditorialTool(int newtool) |
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310 | { |
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311 | actual_handler.disconnect(); |
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312 | |
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313 | switch(newtool) |
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314 | { |
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315 | case MOVE: |
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316 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::move_event_handler), false); |
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317 | break; |
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318 | |
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319 | //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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320 | case CREATE_NODE: |
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321 | actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_node_event_handler), false); |
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322 | break; |
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323 | |
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324 | case CREATE_EDGE: |
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325 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false); |
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326 | break; |
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327 | |
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328 | case ERASER: |
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329 | actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraser_event_handler), false); |
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330 | break; |
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331 | |
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332 | default: |
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333 | break; |
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334 | } |
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335 | } |
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336 | |
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337 | bool GraphDisplayerCanvas::move_event_handler(GdkEvent* e) |
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338 | { |
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339 | switch(e->type) |
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340 | { |
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341 | case GDK_BUTTON_PRESS: |
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342 | //we mark the location of the event to be able to calculate parameters of dragging |
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343 | clicked_x=e->button.x; |
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344 | clicked_y=e->button.y; |
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345 | active_item=(get_item_at(e->button.x, e->button.y)); |
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346 | active_node=INVALID; |
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347 | for (NodeIt i(g); i!=INVALID; ++i) |
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348 | { |
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349 | if(nodesmap[i]==active_item) |
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350 | { |
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351 | active_node=i; |
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352 | } |
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353 | } |
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354 | isbutton=true; |
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355 | break; |
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356 | case GDK_BUTTON_RELEASE: |
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357 | isbutton=false; |
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358 | active_item=NULL; |
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359 | active_node=INVALID; |
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360 | updateScrollRegion(); |
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361 | break; |
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362 | case GDK_MOTION_NOTIFY: |
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363 | //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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364 | if(active_node!=INVALID) |
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365 | { |
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366 | //new coordinates will be the old values, |
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367 | //because the item will be moved to the |
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368 | //new coordinate therefore the new movement |
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369 | //has to be calculated from here |
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370 | |
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371 | double dx=e->motion.x-clicked_x; |
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372 | double dy=e->motion.y-clicked_y; |
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373 | |
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374 | active_item->move(dx, dy); |
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375 | |
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376 | clicked_x=e->motion.x; |
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377 | clicked_y=e->motion.y; |
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378 | |
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379 | //all the edges connected to the moved point has to be redrawn |
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380 | EdgeIt e; |
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381 | |
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382 | g.firstOut(e,active_node); |
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383 | |
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384 | for(;e!=INVALID;g.nextOut(e)) |
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385 | { |
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386 | Gnome::Canvas::Points coos; |
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387 | double x1, x2, y1, y2; |
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388 | |
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389 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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390 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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391 | |
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392 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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393 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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394 | |
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395 | edgesmap[e]->property_points().set_value(coos); |
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396 | |
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397 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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398 | |
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399 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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400 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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401 | } |
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402 | |
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403 | g.firstIn(e,active_node); |
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404 | for(;e!=INVALID;g.nextIn(e)) |
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405 | { |
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406 | Gnome::Canvas::Points coos; |
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407 | double x1, x2, y1, y2; |
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408 | |
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409 | nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2); |
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410 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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411 | |
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412 | nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2); |
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413 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
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414 | |
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415 | edgesmap[e]->property_points().set_value(coos); |
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416 | |
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417 | edgesmap[e]->get_bounds(x1, y1, x2, y2); |
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418 | |
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419 | edgetextmap[e]->property_x().set_value((x1+x2)/2); |
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420 | edgetextmap[e]->property_y().set_value((y1+y2)/2); |
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421 | } |
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422 | } |
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423 | default: break; |
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424 | } |
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425 | |
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426 | return true; |
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427 | } |
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428 | |
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429 | bool GraphDisplayerCanvas::create_node_event_handler(GdkEvent* e) |
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430 | { |
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431 | switch(e->type) |
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432 | { |
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433 | |
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434 | //draw the new node in red at the clicked place |
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435 | case GDK_BUTTON_PRESS: |
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436 | isbutton=true; |
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437 | |
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438 | active_node=NodeIt(g,g.addNode()); |
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439 | |
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440 | window_to_world (e->button.x, e->button.y, clicked_x, clicked_y); |
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441 | |
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442 | 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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443 | active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]); |
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444 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red"); |
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445 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::outline_color("black"); |
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446 | (nodesmap[active_node])->show(); |
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447 | break; |
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448 | |
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449 | //move the new node |
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450 | case GDK_MOTION_NOTIFY: |
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451 | { |
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452 | double world_motion_x, world_motion_y; |
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453 | GdkEvent * generated=new GdkEvent(); |
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454 | window_to_world (e->motion.x, e->motion.y, world_motion_x, world_motion_y); |
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455 | generated->motion.x=world_motion_x; |
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456 | generated->motion.y=world_motion_y; |
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457 | generated->type=GDK_MOTION_NOTIFY; |
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458 | move_event_handler(generated); |
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459 | break; |
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460 | } |
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461 | |
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462 | //finalize the new node |
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463 | case GDK_BUTTON_RELEASE: |
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464 | isbutton=false; |
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465 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
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466 | active_item=NULL; |
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467 | active_node=INVALID; |
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468 | updateScrollRegion(); |
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469 | break; |
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470 | default: |
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471 | break; |
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472 | } |
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473 | return false; |
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474 | } |
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475 | |
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476 | bool GraphDisplayerCanvas::create_edge_event_handler(GdkEvent* e) |
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477 | { |
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478 | switch(e->type) |
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479 | { |
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480 | case GDK_BUTTON_PRESS: |
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481 | //in edge creatino right button has special meaning |
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482 | if(e->button.button!=3) |
---|
483 | { |
---|
484 | //there is not yet selected node |
---|
485 | if(active_node==INVALID) |
---|
486 | { |
---|
487 | //we mark the location of the event to be able to calculate parameters of dragging |
---|
488 | clicked_x=e->button.x; |
---|
489 | clicked_y=e->button.y; |
---|
490 | active_item=(get_item_at(e->button.x, e->button.y)); |
---|
491 | active_node=INVALID; |
---|
492 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
493 | { |
---|
494 | if(nodesmap[i]==active_item) |
---|
495 | { |
---|
496 | active_node=i; |
---|
497 | } |
---|
498 | } |
---|
499 | //the clicked item is really a node |
---|
500 | if(active_node!=INVALID) |
---|
501 | { |
---|
502 | *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red"); |
---|
503 | isbutton=true; |
---|
504 | } |
---|
505 | //clicked item was not a node. It could be e.g. edge. |
---|
506 | else |
---|
507 | { |
---|
508 | active_item=NULL; |
---|
509 | } |
---|
510 | } |
---|
511 | //we only have to do sg. if the mouse button |
---|
512 | // is pressed already once AND the click was |
---|
513 | // on a node that was found in the set of |
---|
514 | //nodes, and now we only search for the second |
---|
515 | //node |
---|
516 | else |
---|
517 | { |
---|
518 | target_item=(get_item_at(e->button.x, e->button.y)); |
---|
519 | Graph::NodeIt target_node=INVALID; |
---|
520 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
521 | { |
---|
522 | if(nodesmap[i]==target_item) |
---|
523 | { |
---|
524 | target_node=i; |
---|
525 | } |
---|
526 | } |
---|
527 | //the clicked item is a node, the edge can be drawn |
---|
528 | if(target_node!=INVALID) |
---|
529 | { |
---|
530 | *(nodesmap[target_node]) << Gnome::Canvas::Properties::fill_color("red"); |
---|
531 | |
---|
532 | //creating new edge |
---|
533 | active_edge=EdgeIt(g,g.addEdge(active_node, target_node)); |
---|
534 | |
---|
535 | //calculating coordinates of new edge |
---|
536 | Gnome::Canvas::Points coos; |
---|
537 | double x1, x2, y1, y2; |
---|
538 | |
---|
539 | active_item->get_bounds(x1, y1, x2, y2); |
---|
540 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
541 | |
---|
542 | target_item->get_bounds(x1, y1, x2, y2); |
---|
543 | coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2)); |
---|
544 | |
---|
545 | //drawing new edge |
---|
546 | edgesmap[active_edge]=new Gnome::Canvas::Line(displayed_graph, coos); |
---|
547 | *(edgesmap[active_edge]) << Gnome::Canvas::Properties::fill_color("green"); |
---|
548 | edgesmap[active_edge]->property_width_pixels().set_value(10); |
---|
549 | |
---|
550 | //redraw nodes to blank terminations of the new edge |
---|
551 | target_item->raise_to_top(); |
---|
552 | active_item->raise_to_top(); |
---|
553 | |
---|
554 | //initializing edge-text as well, to empty string |
---|
555 | edgesmap[active_edge]->get_bounds(x1, y1, x2, y2); |
---|
556 | edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, ""); |
---|
557 | edgetextmap[active_edge]->property_fill_color().set_value("black"); |
---|
558 | } |
---|
559 | //clicked item was not a node. it could be an e.g. edge. we do not deal with it furthermore. |
---|
560 | else |
---|
561 | { |
---|
562 | target_item=NULL; |
---|
563 | } |
---|
564 | } |
---|
565 | } |
---|
566 | break; |
---|
567 | case GDK_BUTTON_RELEASE: |
---|
568 | isbutton=false; |
---|
569 | //we clear settings in two cases |
---|
570 | //1: the edge is ready (target_item has valid value) |
---|
571 | //2: the edge creation is cancelled with right button |
---|
572 | if((target_item)||(e->button.button==3)) |
---|
573 | { |
---|
574 | if(active_item) |
---|
575 | { |
---|
576 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
577 | active_item=NULL; |
---|
578 | } |
---|
579 | if(target_item) |
---|
580 | { |
---|
581 | *target_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
582 | target_item=NULL; |
---|
583 | } |
---|
584 | active_node=INVALID; |
---|
585 | active_edge=INVALID; |
---|
586 | } |
---|
587 | break; |
---|
588 | default: |
---|
589 | break; |
---|
590 | } |
---|
591 | return false; |
---|
592 | } |
---|
593 | |
---|
594 | bool GraphDisplayerCanvas::eraser_event_handler(GdkEvent* e) |
---|
595 | { |
---|
596 | switch(e->type) |
---|
597 | { |
---|
598 | case GDK_BUTTON_PRESS: |
---|
599 | active_item=(get_item_at(e->button.x, e->button.y)); |
---|
600 | active_node=INVALID; |
---|
601 | active_edge=INVALID; |
---|
602 | for (NodeIt i(g); i!=INVALID; ++i) |
---|
603 | { |
---|
604 | if(nodesmap[i]==active_item) |
---|
605 | { |
---|
606 | active_node=i; |
---|
607 | } |
---|
608 | } |
---|
609 | if(active_node==INVALID) |
---|
610 | { |
---|
611 | for (EdgeIt i(g); i!=INVALID; ++i) |
---|
612 | { |
---|
613 | if(edgesmap[i]==active_item) |
---|
614 | { |
---|
615 | active_edge=i; |
---|
616 | } |
---|
617 | } |
---|
618 | } |
---|
619 | *active_item << Gnome::Canvas::Properties::fill_color("red"); |
---|
620 | break; |
---|
621 | |
---|
622 | case GDK_BUTTON_RELEASE: |
---|
623 | if(active_item==(get_item_at(e->button.x, e->button.y))) |
---|
624 | { |
---|
625 | if(active_node!=INVALID) |
---|
626 | { |
---|
627 | |
---|
628 | //collecting edges to delete |
---|
629 | EdgeIt e; |
---|
630 | std::set<Graph::Edge> edges_to_delete; |
---|
631 | |
---|
632 | g.firstOut(e,active_node); |
---|
633 | for(;e!=INVALID;g.nextOut(e)) |
---|
634 | { |
---|
635 | edges_to_delete.insert(e); |
---|
636 | } |
---|
637 | |
---|
638 | g.firstIn(e,active_node); |
---|
639 | for(;e!=INVALID;g.nextIn(e)) |
---|
640 | { |
---|
641 | edges_to_delete.insert(e); |
---|
642 | } |
---|
643 | |
---|
644 | //deleting collected edges |
---|
645 | for(std::set<Graph::Edge>::iterator edge_set_it=edges_to_delete.begin();edge_set_it!=edges_to_delete.end();edge_set_it++) |
---|
646 | { |
---|
647 | delete_item(*edge_set_it); |
---|
648 | } |
---|
649 | delete_item(active_node); |
---|
650 | } |
---|
651 | //a simple edge was chosen |
---|
652 | else |
---|
653 | { |
---|
654 | delete_item(active_edge); |
---|
655 | } |
---|
656 | |
---|
657 | |
---|
658 | } |
---|
659 | //pointer was moved, deletion is cancelled |
---|
660 | else |
---|
661 | { |
---|
662 | if(active_node!=INVALID) |
---|
663 | { |
---|
664 | *active_item << Gnome::Canvas::Properties::fill_color("blue"); |
---|
665 | } |
---|
666 | else |
---|
667 | { |
---|
668 | *active_item << Gnome::Canvas::Properties::fill_color("green"); |
---|
669 | } |
---|
670 | } |
---|
671 | //reseting datas |
---|
672 | active_item=NULL; |
---|
673 | active_edge=INVALID; |
---|
674 | active_node=INVALID; |
---|
675 | break; |
---|
676 | |
---|
677 | case GDK_MOTION_NOTIFY: |
---|
678 | break; |
---|
679 | |
---|
680 | default: |
---|
681 | break; |
---|
682 | } |
---|
683 | return true; |
---|
684 | } |
---|
685 | |
---|
686 | void GraphDisplayerCanvas::delete_item(NodeIt node_to_delete) |
---|
687 | { |
---|
688 | delete(nodesmap[node_to_delete]); |
---|
689 | g.erase(node_to_delete); |
---|
690 | } |
---|
691 | |
---|
692 | void GraphDisplayerCanvas::delete_item(EdgeIt edge_to_delete) |
---|
693 | { |
---|
694 | delete(edgesmap[edge_to_delete]); |
---|
695 | g.erase(edge_to_delete); |
---|
696 | } |
---|
697 | |
---|
698 | void GraphDisplayerCanvas::delete_item(Graph::Edge edge_to_delete) |
---|
699 | { |
---|
700 | delete(edgesmap[edge_to_delete]); |
---|
701 | g.erase(edge_to_delete); |
---|
702 | } |
---|
703 | |
---|