[1606] | 1 | #include "broken_edge.h" |
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[1632] | 2 | #include <cmath> |
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[1497] | 3 | |
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[1501] | 4 | BrokenEdge::BrokenEdge(Gnome::Canvas::Group & g, Gnome::Canvas::Points p, GraphDisplayerCanvas & gc) : Line(g), gdc(gc), isbutton(false) |
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[1497] | 5 | { |
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[1499] | 6 | my_points=new Gnome::Art::Point[3]; |
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| 7 | |
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| 8 | arrow=new Gnome::Canvas::Polygon(g); |
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| 9 | *arrow << Gnome::Canvas::Properties::fill_color("red"); |
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[1524] | 10 | arrow->signal_event().connect(sigc::mem_fun(*this, &BrokenEdge::edgeFormerEventHandler)); |
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[1645] | 11 | arrow->lower_to_bottom(); |
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[1524] | 12 | setPoints(p); |
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[1499] | 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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[1524] | 20 | void BrokenEdge::setPoints(Gnome::Canvas::Points p, bool move) |
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[1499] | 21 | { |
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| 22 | bool set_arrow=false; |
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[1601] | 23 | //red arrow losts its position-right button |
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[1500] | 24 | if(!move) |
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[1497] | 25 | { |
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[1500] | 26 | if(p.size()==2) |
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| 27 | { |
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| 28 | set_arrow=true; |
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| 29 | Gnome::Canvas::Points points_with_center; |
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| 30 | points_with_center.push_back(my_points[0]=p[0]); |
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| 31 | 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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| 32 | points_with_center.push_back(my_points[2]=p[1]); |
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| 33 | property_points().set_value(points_with_center); |
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| 34 | } |
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| 35 | if(p.size()==3) |
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| 36 | { |
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| 37 | set_arrow=true; |
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| 38 | property_points().set_value(p); |
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| 39 | for(int i=0;i<3;i++) |
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| 40 | { |
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| 41 | my_points[i]=p[i]; |
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| 42 | } |
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| 43 | } |
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| 44 | } |
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| 45 | else |
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[1499] | 46 | { |
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[1601] | 47 | //arrow keeps its position-left button |
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| 48 | |
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[1714] | 49 | // if(p.size()==2) |
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| 50 | // { |
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| 51 | // Gnome::Canvas::Points points; |
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| 52 | // my_points[0]=p[0]; |
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| 53 | // my_points[2]=p[1]; |
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| 54 | // for(int i=0;i<3;i++) |
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| 55 | // { |
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| 56 | // points.push_back(my_points[i]); |
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| 57 | // } |
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| 58 | // property_points().set_value(points); |
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| 59 | // } |
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[1602] | 60 | set_arrow=true; |
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[1601] | 61 | |
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| 62 | ////////////////////////////////////////////////////////////////////////////////////////////////////// |
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[1714] | 63 | /////////// keeps shape-with scalar multiplication - version 2. |
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[1601] | 64 | ////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 65 | |
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[1714] | 66 | if(p.size()==2) |
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| 67 | { |
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| 68 | //old vector from one to the other node - a |
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| 69 | xy<double> a_v(my_points[2].get_x()-my_points[0].get_x(),my_points[2].get_y()-my_points[0].get_y()); |
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| 70 | //new vector from one to the other node - b |
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| 71 | xy<double> b_v(p[1].get_x()-p[0].get_x(),p[1].get_y()-p[0].get_y()); |
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[1601] | 72 | |
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[1714] | 73 | double absa=sqrt(a_v.normSquare()); |
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| 74 | double absb=sqrt(b_v.normSquare()); |
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[1601] | 75 | |
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[1714] | 76 | //old vector from one node to the breakpoint - c |
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| 77 | xy<double> c_v(my_points[1].get_x()-my_points[0].get_x(),my_points[1].get_y()-my_points[0].get_y()); |
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[1601] | 78 | |
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[1714] | 79 | //unit vector with the same direction to a_v |
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| 80 | xy<double> a_v_u(a_v.x/absa,a_v.y/absa); |
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[1601] | 81 | |
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[1714] | 82 | //normal vector of unit vector with the same direction to a_v |
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| 83 | xy<double> a_v_u_n(((-1)*a_v_u.y),a_v_u.x); |
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[1601] | 84 | |
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[1714] | 85 | //unit vector with the same direction to b_v |
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| 86 | xy<double> b_v_u(b_v.x/absb,b_v.y/absb); |
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[1601] | 87 | |
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[1714] | 88 | //normal vector of unit vector with the same direction to b_v |
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| 89 | xy<double> b_v_u_n(((-1)*b_v_u.y),b_v_u.x); |
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[1601] | 90 | |
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[1714] | 91 | //vector c in a_v_u and a_v_u_n co-ordinate system |
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| 92 | xy<double> c_a(c_v*a_v_u,c_v*a_v_u_n); |
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[1601] | 93 | |
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[1714] | 94 | //new vector from one node to the breakpoint - d - we have to calculate this one |
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| 95 | xy<double> d_v=absb/absa*(c_a.x*b_v_u+c_a.y*b_v_u_n); |
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[1601] | 96 | |
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[1714] | 97 | my_points[1]=Gnome::Art::Point(d_v.x+p[0].get_x(),d_v.y+p[0].get_y()); |
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[1601] | 98 | |
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[1714] | 99 | my_points[0]=p[0]; |
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| 100 | my_points[2]=p[1]; |
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[1601] | 101 | |
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[1714] | 102 | Gnome::Canvas::Points points; |
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| 103 | for(int i=0;i<3;i++) |
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| 104 | { |
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| 105 | points.push_back(my_points[i]); |
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| 106 | } |
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| 107 | property_points().set_value(points); |
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| 108 | } |
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[1499] | 109 | } |
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| 110 | if(set_arrow) |
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| 111 | { |
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| 112 | //calculating coordinates of the direction indicator arrow |
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| 113 | |
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| 114 | xy<gdouble> target( my_points[2].get_x(), my_points[2].get_y() ); |
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| 115 | xy<gdouble> center( my_points[1].get_x(), my_points[1].get_y() ); |
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| 116 | |
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| 117 | xy<gdouble> unit_vector_in_dir(target-center); |
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| 118 | // std::cout << target << " - " << center << " = " << unit_vector_in_dir << " / " <<unit_vector_in_dir.normSquare() ; |
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| 119 | unit_vector_in_dir/=sqrt( unit_vector_in_dir.normSquare() ); |
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| 120 | // std::cout << " = " << unit_vector_in_dir << std::endl; |
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| 121 | |
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| 122 | xy<gdouble> unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x); |
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| 123 | // std::cout << unit_norm_vector << std::endl; |
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| 124 | |
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| 125 | { |
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[1504] | 126 | // /\ // top |
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| 127 | // / \ // |
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| 128 | // - - // c(enter)l(eft), ccl, ccr, cr |
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| 129 | // || // |
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| 130 | // || // b(ottom)l, br |
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[1499] | 131 | } |
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| 132 | |
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| 133 | double size=3; |
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| 134 | |
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| 135 | xy<gdouble> bl (center - unit_vector_in_dir * 3 * size + unit_norm_vector * size ); |
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| 136 | xy<gdouble> br (center - unit_vector_in_dir * 3 * size - unit_norm_vector * size ); |
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| 137 | xy<gdouble> ccl(center + unit_vector_in_dir * size + unit_norm_vector * size ); |
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| 138 | xy<gdouble> ccr(center + unit_vector_in_dir * size - unit_norm_vector * size ); |
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| 139 | xy<gdouble> cl (center + unit_vector_in_dir * size + unit_norm_vector * 2 * size ); |
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| 140 | xy<gdouble> cr (center + unit_vector_in_dir * size - unit_norm_vector * 2 * size ); |
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| 141 | xy<gdouble> top(center + unit_vector_in_dir * 3 * size); |
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| 142 | |
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| 143 | // std::cout << bl << " " << br << " " << ccl << " " << ccr << " " << cl << " " << cr << " " << top << std::endl; |
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| 144 | |
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| 145 | Gnome::Canvas::Points arrow_points; |
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| 146 | arrow_points.push_back(Gnome::Art::Point( bl.x , bl.y ) ); |
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| 147 | arrow_points.push_back(Gnome::Art::Point( br.x , br.y ) ); |
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| 148 | arrow_points.push_back(Gnome::Art::Point( ccr.x, ccr.y ) ); |
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| 149 | arrow_points.push_back(Gnome::Art::Point( cr.x , cr.y ) ); |
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| 150 | arrow_points.push_back(Gnome::Art::Point( top.x, top.y ) ); |
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| 151 | arrow_points.push_back(Gnome::Art::Point( cl.x , cl.y ) ); |
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| 152 | arrow_points.push_back(Gnome::Art::Point( ccl.x, ccl.y ) ); |
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| 153 | |
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| 154 | arrow->property_points().set_value(arrow_points); |
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[1497] | 155 | } |
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| 156 | } |
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[1499] | 157 | |
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[1524] | 158 | bool BrokenEdge::edgeFormerEventHandler(GdkEvent* e) |
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[1499] | 159 | { |
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| 160 | switch(e->type) |
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| 161 | { |
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| 162 | case GDK_BUTTON_PRESS: |
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| 163 | //we mark the location of the event to be able to calculate parameters of dragging |
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[1524] | 164 | if(gdc.getActualTool()!=CREATE_NODE) |
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[1501] | 165 | { |
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[1524] | 166 | gdc.toggleEdgeActivity(this, true); |
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[1501] | 167 | clicked_x=e->button.x; |
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| 168 | clicked_y=e->button.y; |
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| 169 | isbutton=true; |
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| 170 | } |
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[1499] | 171 | break; |
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| 172 | case GDK_BUTTON_RELEASE: |
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[1524] | 173 | if(gdc.getActualTool()!=CREATE_NODE) |
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[1505] | 174 | { |
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[1524] | 175 | gdc.toggleEdgeActivity(this, false); |
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[1505] | 176 | isbutton=false; |
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| 177 | } |
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[1499] | 178 | break; |
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| 179 | case GDK_MOTION_NOTIFY: |
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| 180 | //we only have to do sg. if the mouse button is pressed |
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| 181 | if(isbutton) |
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| 182 | { |
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| 183 | //new coordinates will be the old values, |
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| 184 | //because the item will be moved to the |
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| 185 | //new coordinate therefore the new movement |
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| 186 | //has to be calculated from here |
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| 187 | |
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| 188 | double dx=e->motion.x-clicked_x; |
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| 189 | double dy=e->motion.y-clicked_y; |
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| 190 | |
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| 191 | Gnome::Canvas::Points points_new; |
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| 192 | |
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| 193 | points_new.push_back(my_points[0]); |
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| 194 | 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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| 195 | points_new.push_back(my_points[2]); |
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| 196 | |
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[1524] | 197 | setPoints(points_new); |
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| 198 | gdc.textReposition(xy<double>(my_points[1].get_x(),my_points[1].get_y())); |
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[1499] | 199 | |
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| 200 | clicked_x=e->motion.x; |
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| 201 | clicked_y=e->motion.y; |
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| 202 | |
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| 203 | } |
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| 204 | default: break; |
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| 205 | } |
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| 206 | |
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| 207 | return true; |
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| 208 | } |
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[1505] | 209 | |
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[1524] | 210 | xy<double> BrokenEdge::getArrowPos() |
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[1505] | 211 | { |
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| 212 | xy<double> ret_val(my_points[1].get_x(),my_points[1].get_y()); |
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| 213 | return ret_val; |
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| 214 | } |
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