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@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@1289:   bool event_handler(GdkEvent* e, int b);
hegyi@1289: 
hegyi@1289:   ///Event handler function that handles dragging displayed_graph
hegyi@1289:   bool tri_mover(GdkEvent* e);
hegyi@1289: 
hegyi@1289:   ///Coordinates of Weight Point of tirangle
hegyi@1289:   Gnome::Art::Point * wp;
hegyi@1289:   ///Array of nodes of planefigure
hegyi@1289:   Gnome::Canvas::Ellipse ** nodes;
hegyi@1289:   ///Sides of planefigure
hegyi@1289:   Gnome::Canvas::Polygon * sides;
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:   ///Number Of Elements - the number of nodes
hegyi@1289:   int noe;
hegyi@1289: 
hegyi@1289:   ///Array of coordinates
hegyi@1289:   double * coordinates;
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: ///When we click on the weight point we can drag the whole planefigure. This function resolves it.
hegyi@1289: bool GraphDisplayerCanvas::tri_mover(GdkEvent* e)
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:       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: 
hegyi@1289:         Gnome::Canvas::Points coos;
hegyi@1289: 
hegyi@1289:         for(int i=0;i<=noe;i++)
hegyi@1289:         {
hegyi@1289:           nodes[i]->move(dx,dy);
hegyi@1289: 
hegyi@1289:           double x=(coordinates[2*i]+=dx);
hegyi@1289:           double y=(coordinates[2*i+1]+=dy);
hegyi@1289: 
hegyi@1289:           if(i!=noe)coos.push_back(Gnome::Art::Point(x,y));
hegyi@1289: 
hegyi@1289:         }
hegyi@1289: 
hegyi@1289:         clicked_x=e->motion.x;
hegyi@1289:         clicked_y=e->motion.y;
hegyi@1289: 
hegyi@1289:         sides->property_points().set_value(coos);
hegyi@1289:       }
hegyi@1289:     default: break;
hegyi@1289:   }
hegyi@1289:   return true;
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@1289: bool GraphDisplayerCanvas::event_handler(GdkEvent* e, int b)
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 x1, y1, x2, y2;
hegyi@1289:         //(get_item_at(e->motion.x, e->motion.y))->get_bounds(x1, y1, x2, y2);
hegyi@1289:         //printf("Item coos: %d %d %d %d\n", (int)x1, (int)y1, (int)x2, (int)y2);
hegyi@1289:         //printf("Mouse is moved! %d %d\n",(int)e->motion.x,(int)e->motion.y);
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: 
hegyi@1289:         coordinates[2*b]+=dx;
hegyi@1289:         coordinates[2*b+1]+=dy;
hegyi@1289: 
hegyi@1289:         Gnome::Canvas::Points coos;
hegyi@1289: 
hegyi@1289:         double x_wp=0;
hegyi@1289:         double y_wp=0;
hegyi@1289: 
hegyi@1289:         for(int i=0;i<noe;i++)
hegyi@1289:         {
hegyi@1289:           coos.push_back(Gnome::Art::Point(coordinates[2*i], coordinates[2*i+1]));
hegyi@1289: 
hegyi@1289:           x_wp+=coordinates[2*i];
hegyi@1289:           y_wp+=coordinates[2*i+1];
hegyi@1289:         }
hegyi@1289: 
hegyi@1289:         sides->property_points().set_value(coos);
hegyi@1289: 
hegyi@1289:         x_wp/=noe;
hegyi@1289:         y_wp/=noe;
hegyi@1289: 
hegyi@1289:         dx=x_wp-coordinates[noe*2];
hegyi@1289:         dy=y_wp-coordinates[noe*2+1];
hegyi@1289:         nodes[noe]->move(dx, dy);
hegyi@1289: 
hegyi@1289:         coordinates[noe*2]+=dx;
hegyi@1289:         coordinates[noe*2+1]+=dy;
hegyi@1289: 
hegyi@1289:         clicked_x=e->motion.x;
hegyi@1289:         clicked_y=e->motion.y;
hegyi@1289:       }
hegyi@1289:     default: break;
hegyi@1289:   }
hegyi@1289:   return true;
hegyi@1289: }
hegyi@1289: 
hegyi@1289: GraphDisplayerCanvas::GraphDisplayerCanvas(Graph & g, CoordinatesMap & cm):displayed_graph(*(root()), 0, 0),isbutton(false),active_item(NULL)
hegyi@1289: {
hegyi@1289:     nodes=new Gnome::Canvas::Ellipse* [countNodes(g)];
hegyi@1289:     int sorszam=0;
hegyi@1289: 
hegyi@1289:     for (NodeIt i(g); i!=INVALID; ++i)
hegyi@1289:     {
hegyi@1289: 	nodes[sorszam]= new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20);
hegyi@1289: 	*(nodes[sorszam]) << Gnome::Canvas::Properties::fill_color("blue");
hegyi@1289: 	*(nodes[sorszam]) << Gnome::Canvas::Properties::outline_color("black");
hegyi@1289: 	(nodes[sorszam])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &GraphDisplayerCanvas::event_handler),sorszam));
hegyi@1289: 	sorszam++;
hegyi@1289:     }
hegyi@1289: 
hegyi@1289:     for (EdgeIt i(g); i!=INVALID; ++i)
hegyi@1289:     {
hegyi@1289:     }
hegyi@1289: 
hegyi@1289: 
hegyi@1289: }
hegyi@1289: 
hegyi@1289: GraphDisplayerCanvas::~GraphDisplayerCanvas()
hegyi@1289: {
hegyi@1289: }
hegyi@1289: 
hegyi@1289: //MainWin:
hegyi@1289: 
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@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:   for (NodeIt i(g); i!=INVALID; ++i)
hegyi@1289:       std::cout << " " << g.id(i) << " " << cm[i];
hegyi@1289:   std::cout << std::endl;
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: }