ladanyi@1: // -*- C++ -*- //
ladanyi@1: 
ladanyi@1: #ifndef GRAPH_DISPLAYER_CANVAS_H
ladanyi@1: #define GRAPH_DISPLAYER_CANVAS_H
ladanyi@1: 
ladanyi@1: #include <all_include.h>
ladanyi@1: #include <mapstorage.h>
ladanyi@1: #include <libgnomecanvasmm.h>
ladanyi@1: #include <libgnomecanvasmm/polygon.h>
ladanyi@1: 
ladanyi@1: class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
ladanyi@1: {
ladanyi@1:   typedef Gnome::Canvas::CanvasAA Parent;
ladanyi@1: 
ladanyi@1: public:
ladanyi@1:   GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
ladanyi@1:   virtual ~GraphDisplayerCanvas();
ladanyi@1: 
ladanyi@1:   int changeLineWidth (std::string mapname);
ladanyi@1:   int changeColor (std::string mapname);
ladanyi@1:   int changeText (std::string mapname);
ladanyi@1:   int rezoom();
ladanyi@1: 
ladanyi@1: protected:
ladanyi@1: 
ladanyi@1:   virtual bool on_expose_event(GdkEventExpose *);
ladanyi@1: 
ladanyi@1: private:
ladanyi@1: 
ladanyi@1:   ///Event handler function that handles dragging nodes of displayed_graph
ladanyi@1:   bool event_handler(GdkEvent* e, Node n);
ladanyi@1: 
ladanyi@1:   ///The graph, on which we work
ladanyi@1:   Graph g;
ladanyi@1:   ///Map of nodes of planefigure
ladanyi@1:   Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
ladanyi@1:   ///Map of edges of planefigure
ladanyi@1:   Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;
ladanyi@1: 
ladanyi@1:   ///Map of texts to write on edges
ladanyi@1:   Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
ladanyi@1: 
ladanyi@1:   ///Group of graphical elements of displayed_graph
ladanyi@1:   Gnome::Canvas::Group displayed_graph;
ladanyi@1: 
ladanyi@1:   ///Here we store the maps that can be displayed through properties.
ladanyi@1:   MapStorage mapstorage;
ladanyi@1: 
ladanyi@1:   ///Indicates whether the button of mouse is pressed or not
ladanyi@1:   bool isbutton;
ladanyi@1: 
ladanyi@1:   ///At this location was the mousebutton pressed.
ladanyi@1:   ///It helps to calculate the distance of dragging.
ladanyi@1:   double clicked_x, clicked_y;
ladanyi@1: 
ladanyi@1:   ///Remembers which Gnome::Canvas::Item was pressed.
ladanyi@1:   ///this variable is needed, because
ladanyi@1:   ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
ladanyi@1:   ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
ladanyi@1:   Gnome::Canvas::Item * active_item;
ladanyi@1: 
ladanyi@1: 
ladanyi@1: };
ladanyi@1: 
ladanyi@1: #endif //GRAPH_DISPLAYER_CANVAS_H