ladanyi@1442: // -*- C++ -*- //
ladanyi@1442: 
ladanyi@1442: #ifndef GRAPH_DISPLAYER_CANVAS_H
ladanyi@1442: #define GRAPH_DISPLAYER_CANVAS_H
ladanyi@1442: 
hegyi@1501: class GraphDisplayerCanvas;
hegyi@1501: 
ladanyi@1606: #include "all_include.h"
hegyi@1849: #include "nbtab.h"
ladanyi@1442: #include <libgnomecanvasmm.h>
ladanyi@1442: #include <libgnomecanvasmm/polygon.h>
hegyi@1819: #include <lemon/xy.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@1860:   friend class BrokenEdge;
ladanyi@1860: 
hegyi@1819:   class BrokenEdge : public Gnome::Canvas::Line
hegyi@1819:   {
ladanyi@1860:     Edge edge;
hegyi@1819:     GraphDisplayerCanvas & gdc;
hegyi@1819:     Gnome::Canvas::Polygon * arrow;
hegyi@1819: 
hegyi@1819:     ///Indicates whether the button of mouse is pressed or not
hegyi@1819:     bool isbutton;
hegyi@1819: 
hegyi@1819:     ///At this location was the mousebutton pressed.
hegyi@1819:     ///It helps to calculate the distance of dragging.
hegyi@1819:     double clicked_x, clicked_y;
hegyi@1819: 
hegyi@1819:     ///event handler for forming edges
hegyi@1819:     bool edgeFormerEventHandler(GdkEvent*);
hegyi@1819:   public:
ladanyi@1860:     BrokenEdge(Gnome::Canvas::Group &, Edge, GraphDisplayerCanvas &);
hegyi@1819:     ~BrokenEdge();
ladanyi@1860:     void draw();
hegyi@1819:   };
ladanyi@1442:   typedef Gnome::Canvas::CanvasAA Parent;
ladanyi@1442: 
ladanyi@1442: public:
hegyi@1849:   GraphDisplayerCanvas(NoteBookTab &);
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
alpar@1643:   int changeEdgeWidth (std::string mapname, Edge new_item=INVALID);
hegyi@1731:   int resetEdgeWidth (Edge new_item=INVALID);
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
alpar@1643:   int changeEdgeColor (std::string mapname, Edge new_item=INVALID);
hegyi@1731:   int resetEdgeColor (Edge new_item=INVALID);
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
alpar@1643:   int changeEdgeText (std::string mapname, Edge new_item=INVALID);
hegyi@1731:   int resetEdgeText (Edge new_item=INVALID);
hegyi@1512: 
hegyi@1512:   ///Changes the linewidth attribute according to the given map.
hegyi@1512:   ///\param mapname is the name of the map which contains the new values
alpar@1643:   int changeNodeRadius (std::string mapname, Node new_item=INVALID);
hegyi@1731:   int resetNodeRadius (Node new_item=INVALID);
hegyi@1512: 
hegyi@1512:   ///Changes the linecolor attribute according to the given map.
hegyi@1512:   ///\param mapname is the name of the map which contains the new values
alpar@1643:   int changeNodeColor (std::string mapname, Node new_item=INVALID);
hegyi@1731:   int resetNodeColor (Node new_item=INVALID);
hegyi@1512: 
hegyi@1512:   ///Changes the text of line attribute according to the given map.
hegyi@1512:   ///\param mapname is the name of the map which contains the new values
alpar@1643:   int changeNodeText (std::string mapname, Node new_item=INVALID);
hegyi@1731:   int resetNodeText (Node new_item=INVALID);
ladanyi@1442: 
hegyi@1837:   void propertyChange(bool, int);
hegyi@1837:   void propertyUpdate(Edge, int, int dummy=0);
hegyi@1837:   void propertyUpdate(Node, int, int dummy=0);
hegyi@1837: 
hegyi@1837:   void propertyUpdate(Edge);
hegyi@1837:   void propertyUpdate(Node);
hegyi@1837: 
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
hegyi@1505:   ///DEPRECATED!!!!
hegyi@1524:   bool eventHandler(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@1524:   bool moveEventHandler(GdkEvent*);
hegyi@1468:   ///event handler for the case when create_node-tool is active
hegyi@1524:   bool createNodeEventHandler(GdkEvent*);
hegyi@1468:   ///event handler for the case when create_edge-tool is active
hegyi@1524:   bool createEdgeEventHandler(GdkEvent*);
hegyi@1485:   ///event handler for the case when eraser-tool is active
hegyi@1524:   bool eraserEventHandler(GdkEvent*);
hegyi@1550:   ///event handler for the case when edge map editor tool is active
hegyi@1524:   bool edgeMapEditEventHandler(GdkEvent*);
hegyi@1550:   ///event handler for the case when node map editor tool is active
hegyi@1550:   bool nodeMapEditEventHandler(GdkEvent*);
hegyi@1485: 
hegyi@1501: public:
hegyi@1505:   ///Moves the text to new place
hegyi@1524:   void textReposition(xy<double>);
hegyi@1505:   ///Activates an edge belonging to a BrokenEdge
hegyi@1579:   ///
hegyi@1579:   ///After we have activated an edge this way,
hegyi@1579:   ///the GDC object will know, which edge is under forming
hegyi@1579:   ///therefore it can redraw the necessarz elementy on the canvas,
hegyi@1579:   ///for example the text belonging to the \ref BrokenEdge can be
hegyi@1579:   ///redrawn (\ref textReposition).
hegyi@1524:   void toggleEdgeActivity(BrokenEdge*, bool);
hegyi@1505: 
hegyi@1505: public:
hegyi@1501:   ///\return the actual tool in hand
hegyi@1524:   int getActualTool();
hegyi@1501: 
ladanyi@1606:   void drawGraph();
ladanyi@1606:   void clear();
ladanyi@1606: 
hegyi@1585:   ///creates a new Nodemap
hegyi@1597:   int addNewNodeMap(double,std::string);
hegyi@1585:   ///creates a new Edgemap
hegyi@1597:   int addNewEdgeMap(double,std::string);
hegyi@1585: 
hegyi@1501: private:
hegyi@1486:   ///Deletes the given element.
alpar@1643:   void deleteItem(Node);
hegyi@1486:   ///Deletes the given element.
alpar@1643:   void deleteItem(Edge);
hegyi@1468: 
hegyi@1501: private:
hegyi@1501: 
ladanyi@1442:   ///Map of nodes of graph
ladanyi@1442:   Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
ladanyi@1442: 
ladanyi@1442:   ///Map of edges of graph
hegyi@1499:   Graph::EdgeMap<BrokenEdge *> edgesmap;
ladanyi@1442: 
ladanyi@1442:   ///Map of texts to write on edges
ladanyi@1442:   Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
ladanyi@1442: 
hegyi@1512:   ///Map of texts to write on nodes
hegyi@1512:   Graph::NodeMap<Gnome::Canvas::Text *> nodetextmap;
hegyi@1512: 
ladanyi@1442:   ///Group of graphical elements of displayed_graph
ladanyi@1442:   Gnome::Canvas::Group displayed_graph;
ladanyi@1442: 
hegyi@1814: private:
ladanyi@1442:   ///Indicates whether the button of mouse is pressed or not
hegyi@1500:   int isbutton;
ladanyi@1442: 
hegyi@1501:   ///Stores the actual tool in hand
hegyi@1501:   int actual_tool;
hegyi@1501: 
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
hegyi@1474:   Gnome::Canvas::Item * active_item, * target_item;
alpar@1643:   Node active_node;
alpar@1643:   Edge active_edge;
alpar@1643:   Edge forming_edge;
hegyi@1579: 
hegyi@1579:   std::string nodemap_to_edit, edgemap_to_edit;
ladanyi@1442: 
ladanyi@1442:   static const int zoom_step = 5;
hegyi@1499: 
hegyi@1814: private:
hegyi@1814: 
hegyi@1837:   ///reference to the parent window
hegyi@1849:   NoteBookTab & mytab;
hegyi@1614: 
ladanyi@1860:   XY GraphDisplayerCanvas::calcArrowPos(XY, XY, XY, XY, bool);
ladanyi@1442: };
ladanyi@1442: 
ladanyi@1442: #endif //GRAPH_DISPLAYER_CANVAS_H