COIN-OR::LEMON - Graph Library

source: lemon-0.x/gui/graph_displayer_canvas.h @ 1509:f9113440b667

Last change on this file since 1509:f9113440b667 was 1505:7121597da9ba, checked in by Hegyi Péter, 15 years ago

Previous commit was also mine, but I forgot to say, that it was my younger brother's birthyear. From this commit texts of activated maps move together with red arrows.

File size: 4.1 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 <mapstorage.h>
10#include <broken_edge.h>
11#include <libgnomecanvasmm.h>
12#include <libgnomecanvasmm/polygon.h>
13
14///This class is the canvas, on which the graph can be drawn.
15class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
16{
17  typedef Gnome::Canvas::CanvasAA Parent;
18
19public:
20  GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
21  virtual ~GraphDisplayerCanvas();
22
23  ///Changes the linewidth attribute according to the given map.
24  ///\param mapname is the name of the map which contains the new values
25  int changeLineWidth (std::string mapname);
26
27  ///Changes the linecolor attribute according to the given map.
28  ///\param mapname is the name of the map which contains the new values
29  int changeColor (std::string mapname);
30
31  ///Changes the text of line attribute according to the given map.
32  ///\param mapname is the name of the map which contains the new values
33  int changeText (std::string mapname);
34
35  ///Callback for 'ViewZoomIn' action.
36  virtual void zoomIn();
37  ///Callback for 'ViewZoomOut' action.
38  virtual void zoomOut();
39  ///Callback for 'ViewZoomFit' action.
40  virtual void zoomFit();
41  ///Callback for 'ViewZoom100' action.
42  virtual void zoom100();
43  ///Sets the scroll region of the convas to the bounding box of the graph.
44  void updateScrollRegion();
45
46  ///This function changes the tool in the graph-editor's hand
47  void changeEditorialTool(int);
48
49protected:
50
51  //maximizing, minimizing, restoring window, etc.
52  virtual bool on_expose_event(GdkEventExpose *);
53
54private:
55
56  ///This function is responsible for the correct
57  ///reaction of any action happened in the territory
58  ///of the canvas
59  ///DEPRECATED!!!!
60  bool event_handler(GdkEvent* e, Node n);
61
62  ///actual event handler
63  ///
64  ///Actual event handler should be stored, to be able to disconnect it and later reconnect it.
65  sigc::connection actual_handler;
66
67  ///event handler for the case when move-tool is active
68  bool move_event_handler(GdkEvent*);
69  ///event handler for the case when create_node-tool is active
70  bool create_node_event_handler(GdkEvent*);
71  ///event handler for the case when create_edge-tool is active
72  bool create_edge_event_handler(GdkEvent*);
73  ///event handler for the case when eraser-tool is active
74  bool eraser_event_handler(GdkEvent*);
75  ///event handler for the case when eraser-tool is active
76  bool edge_map_edit_event_handler(GdkEvent*);
77
78public:
79  ///Moves the text to new place
80  void text_reposition(xy<double>);
81  ///Activates an edge belonging to a BrokenEdge
82  void toggle_edge_activity(BrokenEdge*, bool);
83
84public:
85  ///\return the actual tool in hand
86  int get_actual_tool();
87
88private:
89  ///Deletes the given element.
90  void delete_item(NodeIt);
91  ///Deletes the given element.
92  void delete_item(EdgeIt);
93  ///Deletes the given element.
94  void delete_item(Graph::Edge);
95
96private:
97
98  ///The graph, on which we work
99  Graph g;
100
101  ///Map of nodes of graph
102  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
103
104  ///Map of edges of graph
105  Graph::EdgeMap<BrokenEdge *> edgesmap;
106
107  ///Map of texts to write on edges
108  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
109
110  ///Group of graphical elements of displayed_graph
111  Gnome::Canvas::Group displayed_graph;
112
113  ///Here we store the maps that can be displayed through properties.
114  MapStorage mapstorage;
115
116  ///Indicates whether the button of mouse is pressed or not
117  int isbutton;
118
119  ///Stores the actual tool in hand
120  int actual_tool;
121
122  ///At this location was the mousebutton pressed.
123  ///It helps to calculate the distance of dragging.
124  double clicked_x, clicked_y;
125
126  ///Remembers which Gnome::Canvas::Item was pressed.
127  ///this variable is needed, because
128  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
129  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
130  Gnome::Canvas::Item * active_item, * target_item;
131  Graph::NodeIt active_node;
132  Graph::EdgeIt active_edge;
133
134  static const int zoom_step = 5;
135
136};
137
138#endif //GRAPH_DISPLAYER_CANVAS_H
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