ladanyi@1412: // -*- C++ -*- //
ladanyi@1412: 
ladanyi@1412: #ifndef GRAPH_DISPLAYER_CANVAS_H
ladanyi@1412: #define GRAPH_DISPLAYER_CANVAS_H
ladanyi@1412: 
ladanyi@1412: #include <all_include.h>
ladanyi@1412: #include <mapstorage.h>
ladanyi@1412: #include <libgnomecanvasmm.h>
ladanyi@1412: #include <libgnomecanvasmm/polygon.h>
ladanyi@1412: 
hegyi@1440: ///This class is the canvas, on which the graph can be drawn.
ladanyi@1412: class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
ladanyi@1412: {
ladanyi@1412:   typedef Gnome::Canvas::CanvasAA Parent;
ladanyi@1412: 
ladanyi@1412: public:
ladanyi@1412:   GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
ladanyi@1412:   virtual ~GraphDisplayerCanvas();
ladanyi@1412: 
hegyi@1440:   ///Changes the linewidth attribute according to the given map.
hegyi@1440:   ///\param mapname is the name of the map which contains the new values
ladanyi@1412:   int changeLineWidth (std::string mapname);
hegyi@1440: 
hegyi@1440:   ///Changes the linecolor attribute according to the given map.
hegyi@1440:   ///\param mapname is the name of the map which contains the new values
ladanyi@1412:   int changeColor (std::string mapname);
hegyi@1440: 
hegyi@1440:   ///Changes the text of line attribute according to the given map.
hegyi@1440:   ///\param mapname is the name of the map which contains the new values
ladanyi@1412:   int changeText (std::string mapname);
hegyi@1440: 
hegyi@1440:   ///Changes the dot-pro-pixel to be able to show the whole graph.
ladanyi@1412:   int rezoom();
ladanyi@1412: 
ladanyi@1412: protected:
ladanyi@1412: 
hegyi@1440:   //maximizing, minimizing, restoring window, etc. 
ladanyi@1412:   virtual bool on_expose_event(GdkEventExpose *);
ladanyi@1412: 
ladanyi@1412: private:
ladanyi@1412: 
hegyi@1440:   ///This function is responsible for the correct
hegyi@1440:   ///reaction of any action happened in the territory
hegyi@1440:   ///of the canvas
ladanyi@1412:   bool event_handler(GdkEvent* e, Node n);
ladanyi@1412: 
ladanyi@1412:   ///The graph, on which we work
ladanyi@1412:   Graph g;
hegyi@1440: 
hegyi@1440:   ///Map of nodes of graph
ladanyi@1412:   Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
hegyi@1440: 
hegyi@1440:   ///Map of edges of graph
ladanyi@1412:   Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;
ladanyi@1412: 
ladanyi@1412:   ///Map of texts to write on edges
ladanyi@1412:   Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
ladanyi@1412: 
ladanyi@1412:   ///Group of graphical elements of displayed_graph
ladanyi@1412:   Gnome::Canvas::Group displayed_graph;
ladanyi@1412: 
ladanyi@1412:   ///Here we store the maps that can be displayed through properties.
ladanyi@1412:   MapStorage mapstorage;
ladanyi@1412: 
ladanyi@1412:   ///Indicates whether the button of mouse is pressed or not
ladanyi@1412:   bool isbutton;
ladanyi@1412: 
ladanyi@1412:   ///At this location was the mousebutton pressed.
ladanyi@1412:   ///It helps to calculate the distance of dragging.
ladanyi@1412:   double clicked_x, clicked_y;
ladanyi@1412: 
ladanyi@1412:   ///Remembers which Gnome::Canvas::Item was pressed.
ladanyi@1412:   ///this variable is needed, because
ladanyi@1412:   ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
ladanyi@1412:   ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
ladanyi@1412:   Gnome::Canvas::Item * active_item;
ladanyi@1412: 
ladanyi@1412: 
ladanyi@1412: };
ladanyi@1412: 
ladanyi@1412: #endif //GRAPH_DISPLAYER_CANVAS_H