ladanyi@1442: // -*- C++ -*- //
ladanyi@1442: 
ladanyi@1442: #ifndef GRAPH_DISPLAYER_CANVAS_H
ladanyi@1442: #define GRAPH_DISPLAYER_CANVAS_H
ladanyi@1442: 
ladanyi@1442: #include <all_include.h>
ladanyi@1442: #include <mapstorage.h>
ladanyi@1442: #include <libgnomecanvasmm.h>
ladanyi@1442: #include <libgnomecanvasmm/polygon.h>
ladanyi@1442: 
ladanyi@1442: ///This class is the canvas, on which the graph can be drawn.
ladanyi@1442: class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
ladanyi@1442: {
ladanyi@1442:   typedef Gnome::Canvas::CanvasAA Parent;
ladanyi@1442: 
ladanyi@1442: public:
ladanyi@1442:   GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
ladanyi@1442:   virtual ~GraphDisplayerCanvas();
ladanyi@1442: 
ladanyi@1442:   ///Changes the linewidth attribute according to the given map.
ladanyi@1442:   ///\param mapname is the name of the map which contains the new values
ladanyi@1442:   int changeLineWidth (std::string mapname);
ladanyi@1442: 
ladanyi@1442:   ///Changes the linecolor attribute according to the given map.
ladanyi@1442:   ///\param mapname is the name of the map which contains the new values
ladanyi@1442:   int changeColor (std::string mapname);
ladanyi@1442: 
ladanyi@1442:   ///Changes the text of line attribute according to the given map.
ladanyi@1442:   ///\param mapname is the name of the map which contains the new values
ladanyi@1442:   int changeText (std::string mapname);
ladanyi@1442: 
ladanyi@1442:   ///Callback for 'ViewZoomIn' action.
ladanyi@1442:   virtual void zoomIn();
ladanyi@1442:   ///Callback for 'ViewZoomOut' action.
ladanyi@1442:   virtual void zoomOut();
ladanyi@1442:   ///Callback for 'ViewZoomFit' action.
ladanyi@1442:   virtual void zoomFit();
ladanyi@1442:   ///Callback for 'ViewZoom100' action.
ladanyi@1442:   virtual void zoom100();
ladanyi@1442:   ///Sets the scroll region of the convas to the bounding box of the graph.
ladanyi@1442:   void updateScrollRegion();
ladanyi@1442: 
hegyi@1468:   ///This function changes the tool in the graph-editor's hand
hegyi@1468:   void changeEditorialTool(int);
hegyi@1468: 
ladanyi@1442: protected:
ladanyi@1442: 
ladanyi@1442:   //maximizing, minimizing, restoring window, etc. 
ladanyi@1442:   virtual bool on_expose_event(GdkEventExpose *);
ladanyi@1442: 
ladanyi@1442: private:
ladanyi@1442: 
ladanyi@1442:   ///This function is responsible for the correct
ladanyi@1442:   ///reaction of any action happened in the territory
ladanyi@1442:   ///of the canvas
ladanyi@1442:   bool event_handler(GdkEvent* e, Node n);
ladanyi@1442: 
hegyi@1468:   ///actual event handler
hegyi@1468:   ///
hegyi@1468:   ///Actual event handler should be stored, to be able to disconnect it and later reconnect it.
hegyi@1468:   sigc::connection actual_handler;
hegyi@1468: 
hegyi@1468:   ///event handler for the case when move-tool is active
hegyi@1468:   bool move_event_handler(GdkEvent*);
hegyi@1468:   ///event handler for the case when create_node-tool is active
hegyi@1468:   bool create_node_event_handler(GdkEvent*);
hegyi@1468:   ///event handler for the case when create_edge-tool is active
hegyi@1468:   bool create_edge_event_handler(GdkEvent*);
hegyi@1468: 
ladanyi@1442:   ///The graph, on which we work
ladanyi@1442:   Graph g;
ladanyi@1442: 
ladanyi@1442:   ///Map of nodes of graph
ladanyi@1442:   Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
ladanyi@1442: 
ladanyi@1442:   ///Map of edges of graph
ladanyi@1442:   Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;
ladanyi@1442: 
ladanyi@1442:   ///Map of texts to write on edges
ladanyi@1442:   Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
ladanyi@1442: 
ladanyi@1442:   ///Group of graphical elements of displayed_graph
ladanyi@1442:   Gnome::Canvas::Group displayed_graph;
ladanyi@1442: 
ladanyi@1442:   ///Here we store the maps that can be displayed through properties.
ladanyi@1442:   MapStorage mapstorage;
ladanyi@1442: 
ladanyi@1442:   ///Indicates whether the button of mouse is pressed or not
ladanyi@1442:   bool isbutton;
ladanyi@1442: 
ladanyi@1442:   ///At this location was the mousebutton pressed.
ladanyi@1442:   ///It helps to calculate the distance of dragging.
ladanyi@1442:   double clicked_x, clicked_y;
ladanyi@1442: 
ladanyi@1442:   ///Remembers which Gnome::Canvas::Item was pressed.
ladanyi@1442:   ///this variable is needed, because
ladanyi@1442:   ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
ladanyi@1442:   ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
ladanyi@1442:   Gnome::Canvas::Item * active_item;
hegyi@1468:   Graph::NodeIt active_node;
ladanyi@1442: 
ladanyi@1442:   static const int zoom_step = 5;
ladanyi@1442: };
ladanyi@1442: 
ladanyi@1442: #endif //GRAPH_DISPLAYER_CANVAS_H