1 | // -*- C++ -*- // |
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2 | |
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3 | #ifndef GRAPH_DISPLAYER_CANVAS_H |
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4 | #define GRAPH_DISPLAYER_CANVAS_H |
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5 | |
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6 | class GraphDisplayerCanvas; |
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7 | |
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8 | #include <all_include.h> |
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9 | #include <map_win.h> |
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10 | #include <mapstorage.h> |
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11 | #include <broken_edge.h> |
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12 | #include <libgnomecanvasmm.h> |
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13 | #include <libgnomecanvasmm/polygon.h> |
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14 | |
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15 | ///This class is the canvas, on which the graph can be drawn. |
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16 | class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA |
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17 | { |
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18 | typedef Gnome::Canvas::CanvasAA Parent; |
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19 | |
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20 | public: |
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21 | GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &, MapWin *); |
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22 | virtual ~GraphDisplayerCanvas(); |
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23 | |
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24 | ///Changes the linewidth attribute according to the given map. |
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25 | ///\param mapname is the name of the map which contains the new values |
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26 | int changeEdgeWidth (std::string mapname, Graph::Edge new_item=INVALID); |
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27 | |
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28 | ///Changes the linecolor attribute according to the given map. |
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29 | ///\param mapname is the name of the map which contains the new values |
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30 | int changeEdgeColor (std::string mapname, Graph::Edge new_item=INVALID); |
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31 | |
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32 | ///Changes the text of line attribute according to the given map. |
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33 | ///\param mapname is the name of the map which contains the new values |
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34 | int changeEdgeText (std::string mapname, Graph::Edge new_item=INVALID); |
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35 | |
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36 | ///Changes the linewidth attribute according to the given map. |
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37 | ///\param mapname is the name of the map which contains the new values |
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38 | int changeNodeRadius (std::string mapname, Graph::Node new_item=INVALID); |
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39 | |
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40 | ///Changes the linecolor attribute according to the given map. |
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41 | ///\param mapname is the name of the map which contains the new values |
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42 | int changeNodeColor (std::string mapname, Graph::Node new_item=INVALID); |
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43 | |
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44 | ///Changes the text of line attribute according to the given map. |
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45 | ///\param mapname is the name of the map which contains the new values |
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46 | int changeNodeText (std::string mapname, Graph::Node new_item=INVALID); |
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47 | |
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48 | ///Callback for 'ViewZoomIn' action. |
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49 | virtual void zoomIn(); |
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50 | ///Callback for 'ViewZoomOut' action. |
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51 | virtual void zoomOut(); |
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52 | ///Callback for 'ViewZoomFit' action. |
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53 | virtual void zoomFit(); |
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54 | ///Callback for 'ViewZoom100' action. |
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55 | virtual void zoom100(); |
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56 | ///Sets the scroll region of the convas to the bounding box of the graph. |
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57 | void updateScrollRegion(); |
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58 | |
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59 | ///This function changes the tool in the graph-editor's hand |
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60 | void changeEditorialTool(int); |
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61 | |
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62 | protected: |
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63 | |
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64 | //maximizing, minimizing, restoring window, etc. |
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65 | virtual bool on_expose_event(GdkEventExpose *); |
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66 | |
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67 | private: |
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68 | |
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69 | ///This function is responsible for the correct |
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70 | ///reaction of any action happened in the territory |
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71 | ///of the canvas |
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72 | ///DEPRECATED!!!! |
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73 | bool eventHandler(GdkEvent* e, Node n); |
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74 | |
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75 | ///actual event handler |
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76 | /// |
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77 | ///Actual event handler should be stored, to be able to disconnect it and later reconnect it. |
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78 | sigc::connection actual_handler; |
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79 | |
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80 | ///event handler for the case when move-tool is active |
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81 | bool moveEventHandler(GdkEvent*); |
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82 | ///event handler for the case when create_node-tool is active |
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83 | bool createNodeEventHandler(GdkEvent*); |
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84 | ///event handler for the case when create_edge-tool is active |
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85 | bool createEdgeEventHandler(GdkEvent*); |
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86 | ///event handler for the case when eraser-tool is active |
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87 | bool eraserEventHandler(GdkEvent*); |
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88 | ///event handler for the case when edge map editor tool is active |
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89 | bool edgeMapEditEventHandler(GdkEvent*); |
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90 | ///event handler for the case when node map editor tool is active |
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91 | bool nodeMapEditEventHandler(GdkEvent*); |
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92 | |
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93 | ///event handler for the case when the entry widget is changed |
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94 | bool entryWidgetChangeHandler(GdkEvent*); |
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95 | |
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96 | public: |
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97 | ///Moves the text to new place |
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98 | void textReposition(xy<double>); |
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99 | ///Activates an edge belonging to a BrokenEdge |
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100 | /// |
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101 | ///After we have activated an edge this way, |
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102 | ///the GDC object will know, which edge is under forming |
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103 | ///therefore it can redraw the necessarz elementy on the canvas, |
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104 | ///for example the text belonging to the \ref BrokenEdge can be |
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105 | ///redrawn (\ref textReposition). |
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106 | void toggleEdgeActivity(BrokenEdge*, bool); |
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107 | |
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108 | public: |
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109 | ///\return the actual tool in hand |
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110 | int getActualTool(); |
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111 | |
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112 | ///creates a new Nodemap |
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113 | void addNewNodeMap(); |
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114 | ///creates a new Edgemap |
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115 | void addNewEdgeMap(); |
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116 | |
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117 | private: |
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118 | ///Deletes the given element. |
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119 | void deleteItem(NodeIt); |
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120 | ///Deletes the given element. |
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121 | void deleteItem(EdgeIt); |
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122 | ///Deletes the given element. |
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123 | void deleteItem(Graph::Edge); |
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124 | |
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125 | private: |
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126 | |
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127 | ///The graph, on which we work |
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128 | Graph & g; |
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129 | |
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130 | ///Map of nodes of graph |
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131 | Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap; |
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132 | |
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133 | ///Map of edges of graph |
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134 | Graph::EdgeMap<BrokenEdge *> edgesmap; |
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135 | |
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136 | ///Map of texts to write on edges |
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137 | Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap; |
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138 | |
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139 | ///Map of texts to write on nodes |
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140 | Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap; |
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141 | |
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142 | ///Group of graphical elements of displayed_graph |
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143 | Gnome::Canvas::Group displayed_graph; |
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144 | |
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145 | ///Map editor entry |
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146 | Gtk::Entry entrywidget; |
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147 | |
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148 | ///GnomeCanvas holder for entry |
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149 | Gnome::Canvas::Widget * canvasentrywidget; |
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150 | |
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151 | ///Here we store the maps that can be displayed through properties. |
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152 | MapStorage & mapstorage; |
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153 | |
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154 | ///Indicates whether the button of mouse is pressed or not |
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155 | int isbutton; |
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156 | |
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157 | ///Stores the actual tool in hand |
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158 | int actual_tool; |
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159 | |
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160 | ///At this location was the mousebutton pressed. |
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161 | ///It helps to calculate the distance of dragging. |
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162 | double clicked_x, clicked_y; |
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163 | |
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164 | ///Remembers which Gnome::Canvas::Item was pressed. |
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165 | ///this variable is needed, because |
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166 | ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault |
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167 | ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution |
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168 | Gnome::Canvas::Item * active_item, * target_item; |
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169 | Graph::NodeIt active_node; |
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170 | Graph::EdgeIt active_edge; |
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171 | Graph::EdgeIt forming_edge; |
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172 | |
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173 | std::string nodemap_to_edit, edgemap_to_edit; |
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174 | |
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175 | static const int zoom_step = 5; |
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176 | |
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177 | ///We need to store mapwin, to be able to ask the appropriate values for properties of new items. |
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178 | MapWin * mapwin; |
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179 | |
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180 | }; |
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181 | |
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182 | #endif //GRAPH_DISPLAYER_CANVAS_H |
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