hegyi@1289: // This example was started by Guillaume Laurent.
hegyi@1289: // It has become a place to dump code that tests parts of the
hegyi@1289: // gnomemm canvas code. Little thought has been given to the
hegyi@1289: // actual on-screen output.
hegyi@1289: 
hegyi@1289: #include <libgnomecanvasmm.h>
hegyi@1289: #include <libgnomecanvasmm/polygon.h>
hegyi@1289: 
hegyi@1289: #include <fstream>
hegyi@1289: #include <iostream>
hegyi@1289: 
hegyi@1289: #include <lemon/list_graph.h>
hegyi@1289: #include <lemon/graph_reader.h>
hegyi@1301: #include <lemon/graph_writer.h>
hegyi@1289: #include <lemon/graph_utils.h>
hegyi@1289: #include <lemon/maps.h>
hegyi@1289: #include <lemon/error.h>
hegyi@1289: #include <lemon/xy.h>
hegyi@1289: 
hegyi@1289: using namespace lemon;
hegyi@1289: 
hegyi@1289: typedef xy<double> Coordinates;
hegyi@1289: typedef ListGraph Graph;
hegyi@1289: typedef Graph::NodeMap<Coordinates> CoordinatesMap;
hegyi@1289: typedef Graph::Node Node;
hegyi@1289: typedef Graph::EdgeIt EdgeIt;
hegyi@1289: typedef Graph::NodeIt NodeIt;
hegyi@1289: 
hegyi@1289: class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
hegyi@1289: {
hegyi@1289:   typedef Gnome::Canvas::CanvasAA Parent;
hegyi@1289: 
hegyi@1289: public:
hegyi@1289:   GraphDisplayerCanvas(Graph &, CoordinatesMap &);
hegyi@1289:   virtual ~GraphDisplayerCanvas();
hegyi@1289: 
hegyi@1289: private:
hegyi@1289: 
hegyi@1289:   ///Event handler function that handles dragging nodes of displayed_graph
hegyi@1301:   bool event_handler(GdkEvent* e, Node n);
hegyi@1289: 
hegyi@1301: 	///The graph, on which we work
hegyi@1301: 	Graph g;
hegyi@1301:   ///Map of nodes of planefigure
hegyi@1301:   Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;  
hegyi@1301:   ///Map of edges of planefigure
hegyi@1301:   Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;  
hegyi@1289:   ///Group of graphical elements of displayed_graph
hegyi@1289:   Gnome::Canvas::Group displayed_graph;
hegyi@1289: 
hegyi@1289:   ///Indicates whether the button of mouse is pressed or not
hegyi@1289:   bool isbutton;
hegyi@1289: 
hegyi@1289:   ///At this location was the mousebutton pressed.
hegyi@1289:   ///It helps to calculate the distance of dragging.
hegyi@1289:   double clicked_x, clicked_y;
hegyi@1289: 
hegyi@1289:   ///Remembers which Gnome::Canvas::Item was pressed.
hegyi@1289:   ///this variable is needed, because
hegyi@1289:   ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
hegyi@1289:   ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
hegyi@1289:   Gnome::Canvas::Item * active_item;
hegyi@1289: 
hegyi@1289: 
hegyi@1289: };
hegyi@1289: 
hegyi@1289: 
hegyi@1289: ///This function moves only one node of displayed_graph,
hegyi@1289: ///but recalculate the location of weight point,
hegyi@1289: ///and also redraw the sides of the planefigure.
hegyi@1301: bool GraphDisplayerCanvas::event_handler(GdkEvent* e, Node n)
hegyi@1289: {
hegyi@1289:   switch(e->type)
hegyi@1289:   {
hegyi@1289:     case GDK_BUTTON_PRESS:
hegyi@1289:       clicked_x=e->button.x;
hegyi@1289:       clicked_y=e->button.y;
hegyi@1289:       active_item=(get_item_at(e->button.x, e->button.y));
hegyi@1289:       isbutton=true;
hegyi@1289:       break;
hegyi@1289:     case GDK_BUTTON_RELEASE:
hegyi@1289:       isbutton=false;
hegyi@1289:       active_item=NULL;
hegyi@1289:       break;
hegyi@1289:     case GDK_MOTION_NOTIFY:
hegyi@1289:       if(isbutton)
hegyi@1289:       {
hegyi@1289:         double dx=e->motion.x-clicked_x;
hegyi@1289:         double dy=e->motion.y-clicked_y;
hegyi@1289:         active_item->move(dx, dy);
hegyi@1289:         clicked_x=e->motion.x;
hegyi@1289:         clicked_y=e->motion.y;
hegyi@1301: 
hegyi@1301: 				EdgeIt e;
hegyi@1301: 
hegyi@1301: 				g.firstOut(e,n);
hegyi@1301: 				for(;e!=INVALID;g.nextOut(e))
hegyi@1301: 				{
hegyi@1301: 						Gnome::Canvas::Points coos;
hegyi@1301: 						double x1, x2, y1, y2;
hegyi@1301: 
hegyi@1301: 						nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1301: 						coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1301: 
hegyi@1301: 						nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1301: 						coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1301: 
hegyi@1301: 						edgesmap[e]->property_points().set_value(coos);
hegyi@1301: 				}
hegyi@1301: 
hegyi@1301: 				g.firstIn(e,n);
hegyi@1301: 				for(;e!=INVALID;g.nextIn(e))
hegyi@1301: 				{
hegyi@1301: 						Gnome::Canvas::Points coos;
hegyi@1301: 						double x1, x2, y1, y2;
hegyi@1301: 
hegyi@1301: 						nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1301: 						coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1301: 
hegyi@1301: 						nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1301: 						coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1301: 
hegyi@1301: 						edgesmap[e]->property_points().set_value(coos);
hegyi@1301: 				}
hegyi@1289:       }
hegyi@1289:     default: break;
hegyi@1289:   }
hegyi@1289:   return true;
hegyi@1289: }
hegyi@1289: 
hegyi@1301: GraphDisplayerCanvas::GraphDisplayerCanvas(Graph & gr, CoordinatesMap & cm):g(gr),nodesmap(g),edgesmap(g),displayed_graph(*(root()), 0, 0),isbutton(false),active_item(NULL)
hegyi@1289: {
hegyi@1301: 		for (EdgeIt i(g); i!=INVALID; ++i)
hegyi@1301:     {
hegyi@1301: 				Gnome::Canvas::Points coos;
hegyi@1301: 				coos.push_back(Gnome::Art::Point(cm[g.source(i)].x,cm[g.source(i)].y));
hegyi@1301: 				coos.push_back(Gnome::Art::Point(cm[g.target(i)].x,cm[g.target(i)].y));
hegyi@1301: 				edgesmap[i]=new Gnome::Canvas::Line(displayed_graph, coos);
hegyi@1301: 				*(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green");
hegyi@1301: 				edgesmap[i]->property_width_pixels().set_value(10);
hegyi@1301:     }
hegyi@1289:     for (NodeIt i(g); i!=INVALID; ++i)
hegyi@1289:     {
hegyi@1301: 				nodesmap[i]=new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20);
hegyi@1301: 				*(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue");
hegyi@1301: 				*(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black");
hegyi@1301: 				(nodesmap[i])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &GraphDisplayerCanvas::event_handler),i));
hegyi@1289:     }
hegyi@1289: 
hegyi@1289: }
hegyi@1289: 
hegyi@1289: GraphDisplayerCanvas::~GraphDisplayerCanvas()
hegyi@1289: {
hegyi@1301: 		Graph::NodeMap <int> id(g);
hegyi@1301: 		Graph::NodeMap <double> xc(g);
hegyi@1301: 		Graph::NodeMap <double> yc(g);
hegyi@1301: 
hegyi@1301: 		int j=1;
hegyi@1301: 
hegyi@1301:     for (NodeIt i(g); i!=INVALID; ++i)
hegyi@1301:     {
hegyi@1301: 				double x1,y1,x2,y2;
hegyi@1301: 				nodesmap[i]->get_bounds(x1, y1, x2, y2);
hegyi@1301: 
hegyi@1301: 				id[i]=j++;
hegyi@1301: 				xc[i]=(x1+x2)/2;
hegyi@1301: 				yc[i]=(y1+y2)/2;
hegyi@1301: 		}
hegyi@1301: 
hegyi@1301: 		GraphWriter<Graph> writer(std::cout,g);
hegyi@1301: 
hegyi@1301: 		writer.addNodeMap("id", id);
hegyi@1301: 		writer.addNodeMap("coordinates_x", xc);
hegyi@1301: 		writer.addNodeMap("coordinates_y", yc);
hegyi@1301: 		writer.run();
hegyi@1289: }
hegyi@1289: 
hegyi@1301: 
hegyi@1289: //MainWin:
hegyi@1289: class MainWin : public Gtk::Window
hegyi@1289: {
hegyi@1289: public:
hegyi@1289:   MainWin(const std::string& title, Graph &, CoordinatesMap &);
hegyi@1289: 
hegyi@1289: protected:
hegyi@1289:   //Member widgets:
hegyi@1289:   GraphDisplayerCanvas gd_canvas;
hegyi@1289: };
hegyi@1289: 
hegyi@1289: MainWin::MainWin(const std::string& title, Graph & graph, CoordinatesMap & cm):gd_canvas(graph, cm)
hegyi@1289: {
hegyi@1289:   set_title (title);
hegyi@1289:   add(gd_canvas);
hegyi@1289:   set_default_size(900,600);
hegyi@1289: 
hegyi@1289:   show_all();
hegyi@1289: }
hegyi@1289: 
hegyi@1289: 
hegyi@1289: ///This class is responsible for being able
hegyi@1289: ///to read xy datastructure from file. It is
hegyi@1289: ///based on BaseMap. The set method sets the
hegyi@1289: ///appropriate value in the final xy NodeMap
hegyi@1289: ///that was given to the constructor.
hegyi@1289: class CoordReaderMap: public MapBase <Node, double>
hegyi@1289: {
hegyi@1289:     CoordinatesMap & cm;
hegyi@1289:     char xoy;
hegyi@1289: 
hegyi@1289: public:
hegyi@1289:     CoordReaderMap(char xory, CoordinatesMap & coordmap);
hegyi@1289:     void set(Node node, double coord);
hegyi@1289: };
hegyi@1289: 
hegyi@1289: ///The constructor expects for an xy NodeMap,
hegyi@1289: ///and we have to tell it, for which  value
hegyi@1289: ///of the xy vector is responsible the actual
hegyi@1289: ///copy.
hegyi@1289: CoordReaderMap::CoordReaderMap(char xory, CoordinatesMap & coordmap): cm(coordmap)
hegyi@1289: {
hegyi@1289:     switch(xory)
hegyi@1289:     {
hegyi@1289: 	case 'x':
hegyi@1289: 	case 'y':
hegyi@1289: 	    xoy=xory;
hegyi@1289: 	    break;
hegyi@1289: 	default:
hegyi@1289: 	    throw UninitializedParameter() ;
hegyi@1289:     }
hegyi@1289: }
hegyi@1289: 
hegyi@1289: ///set method sets the appropriate value in the
hegyi@1289: ///xy type NodeMap that is under construction
hegyi@1289: void CoordReaderMap::set(Node node, double coord)
hegyi@1289: {
hegyi@1289:     switch(xoy)
hegyi@1289:     {
hegyi@1289: 	case 'x':
hegyi@1289: 	    cm[node].x=coord;
hegyi@1289: 	    break;
hegyi@1289: 	case 'y':
hegyi@1289: 	    cm[node].y=coord;
hegyi@1289: 	    break;
hegyi@1289: 	default:
hegyi@1289: 	    throw UninitializedParameter() ;
hegyi@1289:     }
hegyi@1289: }
hegyi@1289: 
hegyi@1289: //main():
hegyi@1289: 
hegyi@1289: int main(int argc, char *argv[])
hegyi@1289: {
hegyi@1290:   if(argc<2)
hegyi@1290:   {
hegyi@1290:       std::cerr << "USAGE: gd <input filename.lgf>" << endl;
hegyi@1290:       return 0;
hegyi@1290:   }
hegyi@1289: 
hegyi@1289:   Coordinates coosvector;
hegyi@1289: 
hegyi@1289:   Graph g;
hegyi@1289: 
hegyi@1289:   CoordinatesMap cm(g);
hegyi@1301:   Graph::EdgeMap<double> cap(g);
hegyi@1289: 
hegyi@1289:   //we create one object to read x coordinates
hegyi@1289:   //and one to read y coordinate of nodes and write them to cm NodeMap.
hegyi@1289:   CoordReaderMap xreader('x',cm);
hegyi@1289:   CoordReaderMap yreader('y',cm);
hegyi@1289: 
hegyi@1290:   std::ifstream is(argv[1]);
hegyi@1289: 
hegyi@1289:   GraphReader<Graph> reader(is, g);
hegyi@1289:   reader.addNodeMap("coordinates_x", xreader);
hegyi@1289:   reader.addNodeMap("coordinates_y", yreader);
hegyi@1289:   reader.run();
hegyi@1289: 
hegyi@1289:   Gnome::Canvas::init();
hegyi@1289:   Gtk::Main app(argc, argv);
hegyi@1289: 
hegyi@1289:   MainWin mainwin("Displayed Graph", g, cm);
hegyi@1289:   app.run(mainwin);
hegyi@1289: 
hegyi@1289:   return 0;
hegyi@1289: }