COIN-OR::LEMON - Graph Library

source: lemon-0.x/gui/graph_displayer_canvas.h @ 1523:144ab0e4b09c

Last change on this file since 1523:144ab0e4b09c was 1512:e54392395480, checked in by Hegyi Péter, 15 years ago

NodeMap? values are now visualizable. Todo: default map-values

File size: 5.1 KB
Line 
1// -*- C++ -*- //
2
3#ifndef GRAPH_DISPLAYER_CANVAS_H
4#define GRAPH_DISPLAYER_CANVAS_H
5
6class GraphDisplayerCanvas;
7
8#include <all_include.h>
9#include <map_win.h>
10#include <mapstorage.h>
11#include <broken_edge.h>
12#include <libgnomecanvasmm.h>
13#include <libgnomecanvasmm/polygon.h>
14
15///This class is the canvas, on which the graph can be drawn.
16class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
17{
18  typedef Gnome::Canvas::CanvasAA Parent;
19
20public:
21  GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &, MapWin *);
22  virtual ~GraphDisplayerCanvas();
23
24  ///Changes the linewidth attribute according to the given map.
25  ///\param mapname is the name of the map which contains the new values
26  int changeEdgeWidth (std::string mapname, Graph::Edge new_item=INVALID);
27
28  ///Changes the linecolor attribute according to the given map.
29  ///\param mapname is the name of the map which contains the new values
30  int changeEdgeColor (std::string mapname, Graph::Edge new_item=INVALID);
31
32  ///Changes the text of line attribute according to the given map.
33  ///\param mapname is the name of the map which contains the new values
34  int changeEdgeText (std::string mapname, Graph::Edge new_item=INVALID);
35
36  ///Changes the linewidth attribute according to the given map.
37  ///\param mapname is the name of the map which contains the new values
38  int changeNodeRadius (std::string mapname, Graph::Node new_item=INVALID);
39
40  ///Changes the linecolor attribute according to the given map.
41  ///\param mapname is the name of the map which contains the new values
42  int changeNodeColor (std::string mapname, Graph::Node new_item=INVALID);
43
44  ///Changes the text of line attribute according to the given map.
45  ///\param mapname is the name of the map which contains the new values
46  int changeNodeText (std::string mapname, Graph::Node new_item=INVALID);
47
48  ///Callback for 'ViewZoomIn' action.
49  virtual void zoomIn();
50  ///Callback for 'ViewZoomOut' action.
51  virtual void zoomOut();
52  ///Callback for 'ViewZoomFit' action.
53  virtual void zoomFit();
54  ///Callback for 'ViewZoom100' action.
55  virtual void zoom100();
56  ///Sets the scroll region of the convas to the bounding box of the graph.
57  void updateScrollRegion();
58
59  ///This function changes the tool in the graph-editor's hand
60  void changeEditorialTool(int);
61
62protected:
63
64  //maximizing, minimizing, restoring window, etc.
65  virtual bool on_expose_event(GdkEventExpose *);
66
67private:
68
69  ///This function is responsible for the correct
70  ///reaction of any action happened in the territory
71  ///of the canvas
72  ///DEPRECATED!!!!
73  bool event_handler(GdkEvent* e, Node n);
74
75  ///actual event handler
76  ///
77  ///Actual event handler should be stored, to be able to disconnect it and later reconnect it.
78  sigc::connection actual_handler;
79
80  ///event handler for the case when move-tool is active
81  bool move_event_handler(GdkEvent*);
82  ///event handler for the case when create_node-tool is active
83  bool create_node_event_handler(GdkEvent*);
84  ///event handler for the case when create_edge-tool is active
85  bool create_edge_event_handler(GdkEvent*);
86  ///event handler for the case when eraser-tool is active
87  bool eraser_event_handler(GdkEvent*);
88  ///event handler for the case when eraser-tool is active
89  bool edge_map_edit_event_handler(GdkEvent*);
90
91public:
92  ///Moves the text to new place
93  void text_reposition(xy<double>);
94  ///Activates an edge belonging to a BrokenEdge
95  void toggle_edge_activity(BrokenEdge*, bool);
96
97public:
98  ///\return the actual tool in hand
99  int get_actual_tool();
100
101private:
102  ///Deletes the given element.
103  void delete_item(NodeIt);
104  ///Deletes the given element.
105  void delete_item(EdgeIt);
106  ///Deletes the given element.
107  void delete_item(Graph::Edge);
108
109private:
110
111  ///The graph, on which we work
112  Graph g;
113
114  ///Map of nodes of graph
115  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
116
117  ///Map of edges of graph
118  Graph::EdgeMap<BrokenEdge *> edgesmap;
119
120  ///Map of texts to write on edges
121  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
122
123  ///Map of texts to write on nodes
124  Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
125
126  ///Group of graphical elements of displayed_graph
127  Gnome::Canvas::Group displayed_graph;
128
129  ///Here we store the maps that can be displayed through properties.
130  MapStorage mapstorage;
131
132  ///Indicates whether the button of mouse is pressed or not
133  int isbutton;
134
135  ///Stores the actual tool in hand
136  int actual_tool;
137
138  ///At this location was the mousebutton pressed.
139  ///It helps to calculate the distance of dragging.
140  double clicked_x, clicked_y;
141
142  ///Remembers which Gnome::Canvas::Item was pressed.
143  ///this variable is needed, because
144  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
145  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
146  Gnome::Canvas::Item * active_item, * target_item;
147  Graph::NodeIt active_node;
148  Graph::EdgeIt active_edge;
149
150  static const int zoom_step = 5;
151
152  ///We need to store mapwin, to be able to ask the appropriate values for properties of new items.
153  MapWin * mapwin;
154
155};
156
157#endif //GRAPH_DISPLAYER_CANVAS_H
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