3 #ifndef GRAPH_DISPLAYER_CANVAS_H
4 #define GRAPH_DISPLAYER_CANVAS_H
6 #include <all_include.h>
7 #include <mapstorage.h>
8 #include <libgnomecanvasmm.h>
9 #include <libgnomecanvasmm/polygon.h>
11 ///This class is the canvas, on which the graph can be drawn.
12 class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
14 typedef Gnome::Canvas::CanvasAA Parent;
17 GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
18 virtual ~GraphDisplayerCanvas();
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);
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);
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);
32 ///Changes the dot-pro-pixel to be able to show the whole graph.
37 //maximizing, minimizing, restoring window, etc.
38 virtual bool on_expose_event(GdkEventExpose *);
42 ///This function is responsible for the correct
43 ///reaction of any action happened in the territory
45 bool event_handler(GdkEvent* e, Node n);
47 ///The graph, on which we work
50 ///Map of nodes of graph
51 Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
53 ///Map of edges of graph
54 Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;
56 ///Map of texts to write on edges
57 Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
59 ///Group of graphical elements of displayed_graph
60 Gnome::Canvas::Group displayed_graph;
62 ///Here we store the maps that can be displayed through properties.
63 MapStorage mapstorage;
65 ///Indicates whether the button of mouse is pressed or not
68 ///At this location was the mousebutton pressed.
69 ///It helps to calculate the distance of dragging.
70 double clicked_x, clicked_y;
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;
81 #endif //GRAPH_DISPLAYER_CANVAS_H