Slight changes in doc.
1 #include "graph_displayer_canvas.h"
4 GraphDisplayerCanvas::BrokenEdge::BrokenEdge(Gnome::Canvas::Group & g, Edge _edge, GraphDisplayerCanvas & gc) : Line(g), edge(_edge), gdc(gc), isbutton(false)
6 arrow=new Gnome::Canvas::Polygon(g);
7 *arrow << Gnome::Canvas::Properties::fill_color("red");
8 arrow->signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::BrokenEdge::edgeFormerEventHandler));
9 arrow->lower_to_bottom();
13 GraphDisplayerCanvas::BrokenEdge::~BrokenEdge()
15 if(arrow)delete(arrow);
18 void GraphDisplayerCanvas::BrokenEdge::draw()
20 MapStorage& ms = gdc.mytab.mapstorage;
24 Gnome::Canvas::Points points;
25 Node source = ms.graph.source(edge);
26 Node target = ms.graph.target(edge);
27 points.push_back(Gnome::Art::Point(ms.coords[source].x,
28 ms.coords[source].y));
29 points.push_back(Gnome::Art::Point(ms.arrow_pos[edge].x,
30 ms.arrow_pos[edge].y));
31 points.push_back(Gnome::Art::Point(ms.coords[target].x,
32 ms.coords[target].y));
33 property_points().set_value(points);
38 //calculating coordinates of the direction indicator arrow
39 XY target(ms.coords[ms.graph.target(edge)]);
40 XY center(ms.arrow_pos[edge]);
42 XY unit_vector_in_dir(target-center);
43 double length=sqrt( unit_vector_in_dir.normSquare() );
45 // std::cout << target << " - " << center << " = " << unit_vector_in_dir << " / " <<unit_vector_in_dir.normSquare() ;
46 unit_vector_in_dir/=length;
47 // std::cout << " = " << unit_vector_in_dir << std::endl;
49 XY unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x);
50 // std::cout << unit_norm_vector << std::endl;
55 // - - // c(enter)l(eft), ccl, ccr, cr
57 // || // b(ottom)l, br
62 XY bl (center - unit_vector_in_dir * 3 * size + unit_norm_vector * size );
63 XY br (center - unit_vector_in_dir * 3 * size - unit_norm_vector * size );
64 XY ccl(center + unit_vector_in_dir * size + unit_norm_vector * size );
65 XY ccr(center + unit_vector_in_dir * size - unit_norm_vector * size );
66 XY cl (center + unit_vector_in_dir * size + unit_norm_vector * 2 * size );
67 XY cr (center + unit_vector_in_dir * size - unit_norm_vector * 2 * size );
68 XY top(center + unit_vector_in_dir * 3 * size);
70 //std::cout << bl << " " << br << " " << ccl << " " << ccr << " " << cl << " " << cr << " " << top << std::endl;
72 Gnome::Canvas::Points arrow_points;
73 arrow_points.push_back(Gnome::Art::Point( bl.x , bl.y ) );
74 arrow_points.push_back(Gnome::Art::Point( br.x , br.y ) );
75 arrow_points.push_back(Gnome::Art::Point( ccr.x, ccr.y ) );
76 arrow_points.push_back(Gnome::Art::Point( cr.x , cr.y ) );
77 arrow_points.push_back(Gnome::Art::Point( top.x, top.y ) );
78 arrow_points.push_back(Gnome::Art::Point( cl.x , cl.y ) );
79 arrow_points.push_back(Gnome::Art::Point( ccl.x, ccl.y ) );
81 arrow->property_points().set_value(arrow_points);
85 bool GraphDisplayerCanvas::BrokenEdge::edgeFormerEventHandler(GdkEvent* e)
89 case GDK_BUTTON_PRESS:
90 //we mark the location of the event to be able to calculate parameters of dragging
91 if(gdc.getActualTool()!=CREATE_NODE)
93 gdc.toggleEdgeActivity(this, true);
94 clicked_x=e->button.x;
95 clicked_y=e->button.y;
99 case GDK_BUTTON_RELEASE:
100 if(gdc.getActualTool()!=CREATE_NODE)
102 gdc.toggleEdgeActivity(this, false);
106 case GDK_MOTION_NOTIFY:
107 //we only have to do sg. if the mouse button is pressed
110 //new coordinates will be the old values,
111 //because the item will be moved to the
112 //new coordinate therefore the new movement
113 //has to be calculated from here
115 double dx=e->motion.x-clicked_x;
116 double dy=e->motion.y-clicked_y;
118 Gnome::Canvas::Points points_new;
120 gdc.mytab.mapstorage.arrow_pos.set(edge, gdc.mytab.mapstorage.arrow_pos[edge] + XY(dx, dy));
123 gdc.textReposition(gdc.mytab.mapstorage.arrow_pos[edge]);
125 clicked_x=e->motion.x;
126 clicked_y=e->motion.y;