COIN-OR::LEMON - Graph Library

source: glemon-0.x/graph_displayer_canvas.cc @ 48:b8ec84524fa2

gui
Last change on this file since 48:b8ec84524fa2 was 48:b8ec84524fa2, checked in by Hegyi Péter, 14 years ago

cout->cerr, node radius and edge width is now scaled, maps are editable by clicking on texts.

  • Property exe set to *
File size: 3.6 KB
Line 
1#include <graph_displayer_canvas.h>
2#include <broken_edge.h>
3#include <math.h>
4
5GraphDisplayerCanvas::GraphDisplayerCanvas(Graph & gr, CoordinatesMap & cm, MapStorage & ms, MapWin * mw):g(gr),nodesmap(g),edgesmap(g),edgetextmap(g),nodetextmap(g),displayed_graph(*(root()), 0, 0),canvasentrywidget(NULL),mapstorage(ms),isbutton(0),active_item(NULL),target_item(NULL),nodemap_to_edit(""),edgemap_to_edit(""),mapwin(mw)
6{
7 
8  //Initializing values.
9  active_node=INVALID;
10  active_edge=INVALID;
11  forming_edge=INVALID;
12
13  //setting event handler for the editor widget
14  entrywidget.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::entryWidgetChangeHandler), false);
15
16  //base event handler is move tool
17  actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::moveEventHandler), false);
18  actual_tool=MOVE;
19
20  //set_center_scroll_region(true);
21
22  //first edges are drawn, to hide joining with nodes later
23
24  for (EdgeIt i(g); i!=INVALID; ++i)
25  {
26
27    //drawing green lines, coordinates are from cm
28
29    Gnome::Canvas::Points coos;
30    coos.push_back(Gnome::Art::Point(cm[g.source(i)].x,cm[g.source(i)].y));
31    coos.push_back(Gnome::Art::Point(cm[g.target(i)].x,cm[g.target(i)].y));
32   
33    edgesmap[i]=new BrokenEdge(displayed_graph, coos, *this);
34    *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green");
35    edgesmap[i]->property_width_units().set_value(10);   
36   
37    //initializing edge-text as well, to empty string
38
39    xy<double> text_pos=edgesmap[i]->getArrowPos();
40    text_pos+=(xy<double>(10,10));
41
42    edgetextmap[i]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");
43    edgetextmap[i]->property_fill_color().set_value("darkgreen");
44    edgetextmap[i]->signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::edgeMapEditEventHandler), false);
45  }
46
47  //afterwards nodes come to be drawn
48
49  NodeIt i(g);
50  int maxx=0, maxy=0, minx=(int)cm[i].x, miny=(int)cm[i].y;
51
52  for (; i!=INVALID; ++i)
53  {
54    //minimum and maximum is gathered to be able to zoom to the graph correctly (whole figure should be seen)
55
56    if(cm[i].x>maxx)maxx=(int)cm[i].x;
57    if(cm[i].y>maxy)maxy=(int)cm[i].y;
58    if(cm[i].x<minx)minx=(int)cm[i].x;
59    if(cm[i].y<miny)miny=(int)cm[i].y;
60
61    //drawing bule nodes, with black line around them
62
63    nodesmap[i]=new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20);
64    *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue");
65    *(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black");
66
67    //initializing edge-text as well, to empty string
68
69    xy<double> text_pos((cm[i].x+node_property_defaults[N_RADIUS]+5),(cm[i].y+node_property_defaults[N_RADIUS]+5));
70
71    nodetextmap[i]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");
72    nodetextmap[i]->property_fill_color().set_value("darkblue");
73    nodetextmap[i]->signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::nodeMapEditEventHandler), false);
74  }
75
76  updateScrollRegion();
77}
78
79GraphDisplayerCanvas::~GraphDisplayerCanvas()
80{
81  if(canvasentrywidget)
82    {
83      delete(canvasentrywidget);
84    }
85
86  //writing out the end state of the graph
87  //\todo all the maps has to be write out!
88
89  Graph::NodeMap <int> id(g);
90  Graph::NodeMap <double> xc(g);
91  Graph::NodeMap <double> yc(g);
92 
93  int j=1;
94 
95  for (NodeIt i(g); i!=INVALID; ++i)
96  {
97    double x1,y1,x2,y2;
98    nodesmap[i]->get_bounds(x1, y1, x2, y2);
99   
100    id[i]=j++;
101    xc[i]=(x1+x2)/2;
102    yc[i]=(y1+y2)/2;
103  }
104
105  GraphWriter<Graph> writer(std::cout,g);
106 
107  writer.writeNodeMap("id", id);
108  writer.writeNodeMap("coordinates_x", xc);
109  writer.writeNodeMap("coordinates_y", yc);
110  writer.run();
111}
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