COIN-OR::LEMON - Graph Library

source: glemon-0.x/graph_displayer_canvas.h @ 4:e099638ff236

gui
Last change on this file since 4:e099638ff236 was 4:e099638ff236, checked in by Hegyi Péter, 14 years ago

Small documentation is added to GUI

File size: 2.5 KB
Line 
1// -*- C++ -*- //
2
3#ifndef GRAPH_DISPLAYER_CANVAS_H
4#define GRAPH_DISPLAYER_CANVAS_H
5
6#include <all_include.h>
7#include <mapstorage.h>
8#include <libgnomecanvasmm.h>
9#include <libgnomecanvasmm/polygon.h>
10
11///This class is the canvas, on which the graph can be drawn.
12class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
13{
14  typedef Gnome::Canvas::CanvasAA Parent;
15
16public:
17  GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
18  virtual ~GraphDisplayerCanvas();
19
20  ///Changes the linewidth attribute according to the given map.
21  ///\param mapname is the name of the map which contains the new values
22  int changeLineWidth (std::string mapname);
23
24  ///Changes the linecolor attribute according to the given map.
25  ///\param mapname is the name of the map which contains the new values
26  int changeColor (std::string mapname);
27
28  ///Changes the text of line attribute according to the given map.
29  ///\param mapname is the name of the map which contains the new values
30  int changeText (std::string mapname);
31
32  ///Changes the dot-pro-pixel to be able to show the whole graph.
33  int rezoom();
34
35protected:
36
37  //maximizing, minimizing, restoring window, etc.
38  virtual bool on_expose_event(GdkEventExpose *);
39
40private:
41
42  ///This function is responsible for the correct
43  ///reaction of any action happened in the territory
44  ///of the canvas
45  bool event_handler(GdkEvent* e, Node n);
46
47  ///The graph, on which we work
48  Graph g;
49
50  ///Map of nodes of graph
51  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
52
53  ///Map of edges of graph
54  Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;
55
56  ///Map of texts to write on edges
57  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
58
59  ///Group of graphical elements of displayed_graph
60  Gnome::Canvas::Group displayed_graph;
61
62  ///Here we store the maps that can be displayed through properties.
63  MapStorage mapstorage;
64
65  ///Indicates whether the button of mouse is pressed or not
66  bool isbutton;
67
68  ///At this location was the mousebutton pressed.
69  ///It helps to calculate the distance of dragging.
70  double clicked_x, clicked_y;
71
72  ///Remembers which Gnome::Canvas::Item was pressed.
73  ///this variable is needed, because
74  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
75  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
76  Gnome::Canvas::Item * active_item;
77
78
79};
80
81#endif //GRAPH_DISPLAYER_CANVAS_H
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