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 "nbtab.h" |
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10 | #include <libgnomecanvasmm.h> |
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11 | #include <libgnomecanvasmm/polygon.h> |
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12 | #include <lemon/xy.h> |
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13 | |
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14 | ///This class is the canvas, on which the graph can be drawn. |
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15 | class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA |
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16 | { |
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17 | friend class BrokenEdge; |
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18 | |
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19 | class BrokenEdge : public Gnome::Canvas::Line |
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20 | { |
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21 | Edge edge; |
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22 | GraphDisplayerCanvas & gdc; |
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23 | Gnome::Canvas::Polygon * arrow; |
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24 | |
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25 | ///Indicates whether the button of mouse is pressed or not |
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26 | bool isbutton; |
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27 | |
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28 | ///At this location was the mousebutton pressed. |
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29 | ///It helps to calculate the distance of dragging. |
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30 | double clicked_x, clicked_y; |
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31 | |
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32 | ///event handler for forming edges |
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33 | bool edgeFormerEventHandler(GdkEvent*); |
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34 | public: |
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35 | BrokenEdge(Gnome::Canvas::Group &, Edge, GraphDisplayerCanvas &); |
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36 | ~BrokenEdge(); |
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37 | void draw(); |
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38 | }; |
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39 | typedef Gnome::Canvas::CanvasAA Parent; |
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40 | |
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41 | public: |
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42 | GraphDisplayerCanvas(NoteBookTab &); |
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43 | virtual ~GraphDisplayerCanvas(); |
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44 | |
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45 | ///Changes the linewidth attribute according to the given map. |
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46 | ///\param mapname is the name of the map which contains the new values |
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47 | int changeEdgeWidth (std::string mapname, Edge new_item=INVALID); |
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48 | int resetEdgeWidth (Edge new_item=INVALID); |
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49 | |
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50 | ///Changes the linecolor attribute according to the given map. |
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51 | ///\param mapname is the name of the map which contains the new values |
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52 | int changeEdgeColor (std::string mapname, Edge new_item=INVALID); |
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53 | int resetEdgeColor (Edge new_item=INVALID); |
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54 | |
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55 | ///Changes the text of line attribute according to the given map. |
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56 | ///\param mapname is the name of the map which contains the new values |
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57 | int changeEdgeText (std::string mapname, Edge new_item=INVALID); |
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58 | int resetEdgeText (Edge new_item=INVALID); |
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59 | |
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60 | ///Changes the linewidth attribute according to the given map. |
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61 | ///\param mapname is the name of the map which contains the new values |
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62 | int changeNodeRadius (std::string mapname, Node new_item=INVALID); |
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63 | int resetNodeRadius (Node new_item=INVALID); |
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64 | |
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65 | ///Changes the linecolor attribute according to the given map. |
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66 | ///\param mapname is the name of the map which contains the new values |
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67 | int changeNodeColor (std::string mapname, Node new_item=INVALID); |
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68 | int resetNodeColor (Node new_item=INVALID); |
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69 | |
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70 | ///Changes the text of line attribute according to the given map. |
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71 | ///\param mapname is the name of the map which contains the new values |
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72 | int changeNodeText (std::string mapname, Node new_item=INVALID); |
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73 | int resetNodeText (Node new_item=INVALID); |
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74 | |
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75 | void propertyChange(bool, int); |
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76 | void propertyUpdate(Edge, int, int dummy=0); |
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77 | void propertyUpdate(Node, int, int dummy=0); |
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78 | |
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79 | void propertyUpdate(Edge); |
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80 | void propertyUpdate(Node); |
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81 | |
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82 | ///Callback for 'ViewZoomIn' action. |
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83 | virtual void zoomIn(); |
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84 | ///Callback for 'ViewZoomOut' action. |
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85 | virtual void zoomOut(); |
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86 | ///Callback for 'ViewZoomFit' action. |
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87 | virtual void zoomFit(); |
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88 | ///Callback for 'ViewZoom100' action. |
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89 | virtual void zoom100(); |
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90 | ///Sets the scroll region of the convas to the bounding box of the graph. |
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91 | void updateScrollRegion(); |
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92 | |
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93 | ///This function changes the tool in the graph-editor's hand |
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94 | void changeEditorialTool(int); |
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95 | |
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96 | protected: |
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97 | |
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98 | //maximizing, minimizing, restoring window, etc. |
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99 | virtual bool on_expose_event(GdkEventExpose *); |
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100 | |
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101 | private: |
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102 | |
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103 | ///This function is responsible for the correct |
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104 | ///reaction of any action happened in the territory |
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105 | ///of the canvas |
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106 | ///DEPRECATED!!!! |
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107 | bool eventHandler(GdkEvent* e, Node n); |
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108 | |
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109 | ///actual event handler |
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110 | /// |
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111 | ///Actual event handler should be stored, to be able to disconnect it and later reconnect it. |
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112 | sigc::connection actual_handler; |
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113 | |
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114 | ///event handler for the case when move-tool is active |
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115 | bool moveEventHandler(GdkEvent*); |
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116 | ///event handler for the case when create_node-tool is active |
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117 | bool createNodeEventHandler(GdkEvent*); |
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118 | ///event handler for the case when create_edge-tool is active |
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119 | bool createEdgeEventHandler(GdkEvent*); |
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120 | ///event handler for the case when eraser-tool is active |
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121 | bool eraserEventHandler(GdkEvent*); |
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122 | ///event handler for the case when edge map editor tool is active |
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123 | bool edgeMapEditEventHandler(GdkEvent*); |
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124 | ///event handler for the case when node map editor tool is active |
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125 | bool nodeMapEditEventHandler(GdkEvent*); |
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126 | |
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127 | public: |
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128 | ///Moves the text to new place |
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129 | void textReposition(xy<double>); |
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130 | ///Activates an edge belonging to a BrokenEdge |
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131 | /// |
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132 | ///After we have activated an edge this way, |
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133 | ///the GDC object will know, which edge is under forming |
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134 | ///therefore it can redraw the necessarz elementy on the canvas, |
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135 | ///for example the text belonging to the \ref BrokenEdge can be |
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136 | ///redrawn (\ref textReposition). |
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137 | void toggleEdgeActivity(BrokenEdge*, bool); |
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138 | |
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139 | public: |
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140 | ///\return the actual tool in hand |
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141 | int getActualTool(); |
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142 | |
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143 | void drawGraph(); |
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144 | void clear(); |
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145 | |
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146 | ///creates a new Nodemap |
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147 | int addNewNodeMap(double,std::string); |
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148 | ///creates a new Edgemap |
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149 | int addNewEdgeMap(double,std::string); |
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150 | |
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151 | private: |
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152 | ///Deletes the given element. |
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153 | void deleteItem(Node); |
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154 | ///Deletes the given element. |
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155 | void deleteItem(Edge); |
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156 | |
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157 | private: |
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158 | |
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159 | ///Map of nodes of graph |
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160 | Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap; |
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161 | |
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162 | ///Map of edges of graph |
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163 | Graph::EdgeMap<BrokenEdge *> edgesmap; |
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164 | |
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165 | ///Map of texts to write on edges |
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166 | Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap; |
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167 | |
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168 | ///Map of texts to write on nodes |
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169 | Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap; |
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170 | |
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171 | ///Group of graphical elements of displayed_graph |
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172 | Gnome::Canvas::Group displayed_graph; |
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173 | |
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174 | private: |
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175 | ///Indicates whether the button of mouse is pressed or not |
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176 | int isbutton; |
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177 | |
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178 | ///Stores the actual tool in hand |
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179 | int actual_tool; |
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180 | |
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181 | ///At this location was the mousebutton pressed. |
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182 | ///It helps to calculate the distance of dragging. |
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183 | double clicked_x, clicked_y; |
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184 | |
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185 | ///Remembers which Gnome::Canvas::Item was pressed. |
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186 | ///this variable is needed, because |
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187 | ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault |
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188 | ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution |
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189 | Gnome::Canvas::Item * active_item, * target_item; |
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190 | Node active_node; |
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191 | Edge active_edge; |
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192 | Edge forming_edge; |
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193 | |
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194 | std::string nodemap_to_edit, edgemap_to_edit; |
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195 | |
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196 | static const int zoom_step = 5; |
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197 | |
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198 | private: |
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199 | |
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200 | ///reference to the parent window |
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201 | NoteBookTab & mytab; |
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202 | |
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203 | XY GraphDisplayerCanvas::calcArrowPos(XY, XY, XY, XY, bool); |
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204 | }; |
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205 | |
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206 | #endif //GRAPH_DISPLAYER_CANVAS_H |
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