[17] | 1 | #include <broken_edge.h> |
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[19] | 2 | #include <lemon/xy.h> |
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| 3 | #include <math.h> |
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[17] | 4 | |
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[19] | 5 | BrokenEdge::BrokenEdge(Gnome::Canvas::Group & g, Gnome::Canvas::Points p) : Line(g), isbutton(false) |
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[17] | 6 | { |
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[19] | 7 | my_points=new Gnome::Art::Point[3]; |
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| 8 | |
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| 9 | arrow=new Gnome::Canvas::Polygon(g); |
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| 10 | *arrow << Gnome::Canvas::Properties::fill_color("red"); |
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| 11 | arrow->signal_event().connect(sigc::mem_fun(*this, &BrokenEdge::edge_former_event_handler)); |
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| 12 | set_points(p); |
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| 13 | } |
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| 14 | |
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| 15 | BrokenEdge::~BrokenEdge() |
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| 16 | { |
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| 17 | if(arrow)delete(arrow); |
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| 18 | } |
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| 19 | |
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| 20 | void BrokenEdge::set_points(Gnome::Canvas::Points p) |
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| 21 | { |
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| 22 | bool set_arrow=false; |
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[17] | 23 | if(p.size()==2) |
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| 24 | { |
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[19] | 25 | set_arrow=true; |
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[17] | 26 | Gnome::Canvas::Points points_with_center; |
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[19] | 27 | points_with_center.push_back(my_points[0]=p[0]); |
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| 28 | points_with_center.push_back(my_points[1]=Gnome::Art::Point( (p[0].get_x()+p[1].get_x())/2+0 , (p[0].get_y()+p[1].get_y())/2 )+0 ); |
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| 29 | points_with_center.push_back(my_points[2]=p[1]); |
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[17] | 30 | property_points().set_value(points_with_center); |
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[19] | 31 | } |
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| 32 | if(p.size()==3) |
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| 33 | { |
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| 34 | set_arrow=true; |
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| 35 | property_points().set_value(p); |
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| 36 | for(int i=0;i<3;i++) |
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| 37 | { |
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| 38 | my_points[i]=p[i]; |
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| 39 | } |
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| 40 | } |
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| 41 | |
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| 42 | if(set_arrow) |
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| 43 | { |
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| 44 | //calculating coordinates of the direction indicator arrow |
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| 45 | |
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| 46 | xy<gdouble> target( my_points[2].get_x(), my_points[2].get_y() ); |
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| 47 | xy<gdouble> center( my_points[1].get_x(), my_points[1].get_y() ); |
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| 48 | |
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| 49 | xy<gdouble> unit_vector_in_dir(target-center); |
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| 50 | // std::cout << target << " - " << center << " = " << unit_vector_in_dir << " / " <<unit_vector_in_dir.normSquare() ; |
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| 51 | unit_vector_in_dir/=sqrt( unit_vector_in_dir.normSquare() ); |
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| 52 | // std::cout << " = " << unit_vector_in_dir << std::endl; |
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| 53 | |
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| 54 | xy<gdouble> unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x); |
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| 55 | // std::cout << unit_norm_vector << std::endl; |
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| 56 | |
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| 57 | { |
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| 58 | // /\ top |
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| 59 | // / \ |
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| 60 | // - - c(enter)l(eft), ccl, ccr, cr |
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| 61 | // || |
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| 62 | // || b(ottom)l, br |
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| 63 | } |
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| 64 | |
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| 65 | double size=3; |
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| 66 | |
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| 67 | xy<gdouble> bl (center - unit_vector_in_dir * 3 * size + unit_norm_vector * size ); |
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| 68 | xy<gdouble> br (center - unit_vector_in_dir * 3 * size - unit_norm_vector * size ); |
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| 69 | xy<gdouble> ccl(center + unit_vector_in_dir * size + unit_norm_vector * size ); |
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| 70 | xy<gdouble> ccr(center + unit_vector_in_dir * size - unit_norm_vector * size ); |
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| 71 | xy<gdouble> cl (center + unit_vector_in_dir * size + unit_norm_vector * 2 * size ); |
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| 72 | xy<gdouble> cr (center + unit_vector_in_dir * size - unit_norm_vector * 2 * size ); |
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| 73 | xy<gdouble> top(center + unit_vector_in_dir * 3 * size); |
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| 74 | |
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| 75 | // std::cout << bl << " " << br << " " << ccl << " " << ccr << " " << cl << " " << cr << " " << top << std::endl; |
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| 76 | |
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| 77 | Gnome::Canvas::Points arrow_points; |
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| 78 | arrow_points.push_back(Gnome::Art::Point( bl.x , bl.y ) ); |
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| 79 | arrow_points.push_back(Gnome::Art::Point( br.x , br.y ) ); |
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| 80 | arrow_points.push_back(Gnome::Art::Point( ccr.x, ccr.y ) ); |
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| 81 | arrow_points.push_back(Gnome::Art::Point( cr.x , cr.y ) ); |
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| 82 | arrow_points.push_back(Gnome::Art::Point( top.x, top.y ) ); |
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| 83 | arrow_points.push_back(Gnome::Art::Point( cl.x , cl.y ) ); |
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| 84 | arrow_points.push_back(Gnome::Art::Point( ccl.x, ccl.y ) ); |
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| 85 | |
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| 86 | arrow->property_points().set_value(arrow_points); |
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[17] | 87 | } |
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| 88 | } |
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[19] | 89 | |
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| 90 | bool BrokenEdge::edge_former_event_handler(GdkEvent* e) |
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| 91 | { |
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| 92 | switch(e->type) |
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| 93 | { |
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| 94 | case GDK_BUTTON_PRESS: |
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| 95 | //we mark the location of the event to be able to calculate parameters of dragging |
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| 96 | clicked_x=e->button.x; |
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| 97 | clicked_y=e->button.y; |
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| 98 | isbutton=true; |
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| 99 | break; |
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| 100 | case GDK_BUTTON_RELEASE: |
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| 101 | isbutton=false; |
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| 102 | break; |
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| 103 | case GDK_MOTION_NOTIFY: |
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| 104 | //we only have to do sg. if the mouse button is pressed |
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| 105 | if(isbutton) |
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| 106 | { |
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| 107 | //new coordinates will be the old values, |
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| 108 | //because the item will be moved to the |
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| 109 | //new coordinate therefore the new movement |
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| 110 | //has to be calculated from here |
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| 111 | |
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| 112 | double dx=e->motion.x-clicked_x; |
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| 113 | double dy=e->motion.y-clicked_y; |
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| 114 | |
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| 115 | Gnome::Canvas::Points points_new; |
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| 116 | |
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| 117 | points_new.push_back(my_points[0]); |
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| 118 | points_new.push_back(my_points[1]=Gnome::Art::Point(my_points[1].get_x()+dx,my_points[1].get_y()+dy)); |
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| 119 | points_new.push_back(my_points[2]); |
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| 120 | |
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| 121 | set_points(points_new); |
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| 122 | |
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| 123 | clicked_x=e->motion.x; |
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| 124 | clicked_y=e->motion.y; |
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| 125 | |
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| 126 | } |
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| 127 | default: break; |
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| 128 | } |
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| 129 | |
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| 130 | return true; |
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| 131 | } |
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