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source: lemon-0.x/gui/broken_edge.cc @ 1641:77f6ab7ad66f

Last change on this file since 1641:77f6ab7ad66f was 1632:93ac8c521fe5, checked in by Alpar Juttner, 19 years ago

math.h -> cmath
File size: 11.4 KB
Line 
1#include "broken_edge.h"
2#include <cmath>
3
4BrokenEdge::BrokenEdge(Gnome::Canvas::Group & g, Gnome::Canvas::Points p, GraphDisplayerCanvas & gc) : Line(g), gdc(gc), isbutton(false)
5{
6  my_points=new Gnome::Art::Point[3];
7
8  arrow=new Gnome::Canvas::Polygon(g);
9  *arrow << Gnome::Canvas::Properties::fill_color("red");
10  arrow->signal_event().connect(sigc::mem_fun(*this, &BrokenEdge::edgeFormerEventHandler));
11  setPoints(p);
12}
13
14BrokenEdge::~BrokenEdge()
15{
16  if(arrow)delete(arrow);
17}
18
19void BrokenEdge::setPoints(Gnome::Canvas::Points p, bool move)
20{
21  bool set_arrow=false;
22  //red arrow losts its position-right button
23  if(!move)
24    {
25      if(p.size()==2)
26        {
27          set_arrow=true;
28          Gnome::Canvas::Points points_with_center;
29          points_with_center.push_back(my_points[0]=p[0]);
30          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 );
31          points_with_center.push_back(my_points[2]=p[1]);
32          property_points().set_value(points_with_center);
33        } 
34      if(p.size()==3)
35        {
36          set_arrow=true;
37          property_points().set_value(p);
38          for(int i=0;i<3;i++)
39            {
40              my_points[i]=p[i];
41            }
42        }
43    }
44  else
45    {
46      //arrow keeps its position-left button
47
48      if(p.size()==2)
49        {
50          Gnome::Canvas::Points points;
51          my_points[0]=p[0];
52          my_points[2]=p[1];
53          for(int i=0;i<3;i++)
54            {
55              points.push_back(my_points[i]);
56            }
57          property_points().set_value(points);
58        }
59      set_arrow=true;
60
61      //////////////////////////////////////////////////////////////////////////////////////////////////////
62      /////////// kepps shape-with angles
63      //////////////////////////////////////////////////////////////////////////////////////////////////////
64
65
66//       //old vector from one to the other node
67//       xy<double> o_p2p(my_points[2].get_x()-my_points[0].get_x(),my_points[2].get_y()-my_points[0].get_y());
68//       //projection of the old vector to positive x axis
69//       xy<double> o_x_p2p(fabs(o_p2p.x),0);
70//       //length of p2p vector
71//       double o_l_p2p=sqrt( o_p2p.normSquare() );
72//       if(o_p2p.x<0)
73//      {
74//        o_l_p2p*=-1;
75//      }
76//       //length of projection of p2p vector
77//       double o_l_x_p2p=sqrt( o_x_p2p.normSquare() );
78//       //old angle of p2p vector to the x axis
79//       double o_a_p2p=acos(o_l_x_p2p/o_l_p2p);
80//       if(o_p2p.y>0)
81//      {
82//        o_a_p2p=2*M_PI-o_a_p2p;
83//      }
84
85//       //old vector from first node to the breakpoint
86//       xy<double> o_1b((my_points[1].get_x()-my_points[0].get_x()),(my_points[1].get_y()-my_points[0].get_y()));
87//       //projection of the old node-breakpoint vector to positive x axis
88//       xy<double> o_x_1b(fabs(o_1b.x),0);
89//       //length of 1b vector
90//       double o_l_1b=sqrt( o_1b.normSquare() );
91//       if(o_1b.x<0)
92//      {
93//        o_l_1b*=-1;
94//      }
95//       //length of projection of 1b vector
96//       double o_l_x_1b=sqrt( o_x_1b.normSquare() );
97//       //old angle of 1b vector to the x axis
98//       double o_a_1b=acos(o_l_x_1b/o_l_1b);
99//       if(o_1b.y>0)
100//      {
101//        o_a_1b=2*M_PI-o_a_1b;
102//      }
103
104//       if(p.size()==2)
105//              {
106//        set_arrow=true;
107
108//                my_points[0]=p[0];
109//                my_points[2]=p[1];
110
111//        //new vector from one to the other node
112//        xy<double> n_p2p(my_points[2].get_x()-my_points[0].get_x(),my_points[2].get_y()-my_points[0].get_y());
113//        //projection of the new vector to positive x axis
114//        xy<double> n_x_p2p(fabs(n_p2p.x),0);
115//        //length of p2p vector
116//        double n_l_p2p=sqrt( n_p2p.normSquare() );
117//        if(n_p2p.x<0)
118//          {
119//            n_l_p2p*=-1;
120//          }
121//        //length of projection of p2p vector
122//        double n_l_x_p2p=sqrt( n_x_p2p.normSquare() );
123//        //new angle of p2p vector to the x axis
124//        double n_a_p2p=acos(n_l_x_p2p/n_l_p2p);
125//        if(n_p2p.y>0)
126//          {
127//            n_a_p2p=2*M_PI-n_a_p2p;
128//          }
129
130//        //new angle of 1b vector to the x axis
131//        double n_a_1b=o_a_1b+n_a_p2p-o_a_p2p;
132
133//        std::cout << " p2p regi: " << o_a_p2p/M_PI*180 << " uj: " << n_a_p2p/M_PI*180-(int)n_a_p2p/M_PI*180 << std::endl;
134//        std::cout << " 1b regi: " << o_a_1b/M_PI*180 << " uj: " << n_a_1b/M_PI*180-(int)n_a_1b/M_PI*180 << std::endl;
135
136// //     std::cout << o_p2p << " " << n_p2p << std::endl;
137
138//        if((n_a_1b>M_PI*3/2)||(n_a_1b<M_PI/2))
139//          {
140//            std::cout << "jobb terfel" << std::endl;
141//            my_points[1]=Gnome::Art::Point(p[0].get_x()+cos(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p,p[0].get_y()-sin(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p);
142//          }
143//        else if((n_a_1b<M_PI*3/2)&&(n_a_1b>M_PI/2))
144//          {
145//            std::cout << "bal terfel" << std::endl;
146//            my_points[1]=Gnome::Art::Point(p[0].get_x()-cos(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p,p[0].get_y()+sin(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p);
147//          }
148//        else
149//          {
150//            std::cout << "y tengely" << std::endl;
151//            double new_y=my_points[1].get_y();
152//            my_points[1]=Gnome::Art::Point(p[0].get_x()-cos(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p,new_y);
153//          }
154
155//        std::cout << "alap: " << p[0] << " eredeti hossz: " << o_l_1b << " nagy uj: " << n_l_p2p << " nagy regi: " << o_l_p2p << " a*b/c " << o_l_1b*n_l_p2p/o_l_p2p << " eredmeny: " << my_points[1] << std::endl;
156
157
158// //     if(o_1b.x*o_1b.y>0)
159// //       {
160// //         if(n_p2p.x>0)
161// //           {
162// //             my_points[1]=Gnome::Art::Point(p[0].get_x()+cos(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p,p[0].get_y()+sin(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p);
163// //           }
164// //         else
165// //           {
166// //             my_points[1]=Gnome::Art::Point(p[0].get_x()-cos(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p,p[0].get_y()-sin(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p);
167// //           }
168// //       }
169// //     else if(o_1b.x*o_1b.y<0)
170// //       {
171// //         if(n_p2p.x>0)
172// //           {
173// //             my_points[1]=Gnome::Art::Point(p[0].get_x()+cos(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p,p[0].get_y()-sin(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p);
174// //           }
175// //         else
176// //           {
177// //             my_points[1]=Gnome::Art::Point(p[0].get_x()-cos(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p,p[0].get_y()+sin(n_a_1b)*o_l_1b*n_l_p2p/o_l_p2p);
178// //           }
179// //       }
180// //     else
181// //       {
182// //       }
183
184      //////////////////////////////////////////////////////////////////////////////////////////////////////
185      /////////// kepps shape-with scalar multiplication
186      //////////////////////////////////////////////////////////////////////////////////////////////////////
187
188//       if(p.size()==2)
189//              {
190//        //old vector from one to the other node - a
191//        xy<double> a_v(my_points[2].get_x()-my_points[0].get_x(),my_points[2].get_y()-my_points[0].get_y());
192//        //new vector from one to the other node - b
193//        xy<double> b_v(p[1].get_x()-p[0].get_x(),p[1].get_y()-p[0].get_y());
194
195//        //old vector from one node to the breakpoint - c
196//        xy<double> c_v(my_points[1].get_x()-my_points[0].get_x(),my_points[1].get_y()-my_points[0].get_y());
197
198//        //new vector from one node to the breakpoint - d - we have to calculate this one
199//        xy<double> d_v;
200
201//        //scalar product of a and b (old and new vector from first point to the other)
202//        double sab=a_v*b_v;
203//        //scalar product of c and d (old and new vector from first point to breakpoint)
204//        double scd=sab*c_v.normSquare()/a_v.normSquare();
205
206//        std::cout<<" a " << a_v<<" b " <<b_v<<" c " <<c_v<<" sab " <<sab<<" scd "<<scd<<std::endl;
207
208//        double a=c_v.normSquare();
209//        double b=2*scd*c_v.y;
210//        double c=scd*scd-b_v.normSquare()/a_v.normSquare()*c_v.normSquare()*c_v.x*c_v.x;
211
212//        std::cout<<" a " << a<<" b " <<b<<" c " <<c<<std::endl;
213
214//        d_v.y=(-b-sqrt(b*b-4*a*c))/2/a;
215
216//        if(c_v.x!=0)
217//          {
218//            d_v.x=(scd-c_v.y*d_v.y)/c_v.x;
219//          }
220//        else
221//          {
222//            d_v.x=my_points[1].get_x();
223//          }
224
225//        std::cout<<" d " << d_v<<std::endl;
226
227//        my_points[1]=Gnome::Art::Point(d_v.x+p[0].get_x(),d_v.y+p[0].get_y());
228
229//        Gnome::Canvas::Points points;
230//        for(int i=0;i<3;i++)
231//          {
232//            points.push_back(my_points[i]);
233//          }
234//        property_points().set_value(points);
235//      }
236    }
237  if(set_arrow)
238    {
239      //calculating coordinates of the direction indicator arrow
240
241      xy<gdouble> target( my_points[2].get_x(), my_points[2].get_y() );
242      xy<gdouble> center( my_points[1].get_x(), my_points[1].get_y() );
243
244      xy<gdouble> unit_vector_in_dir(target-center);
245      //       std::cout << target << " - " << center << " = " << unit_vector_in_dir << "    / " <<unit_vector_in_dir.normSquare() ;
246      unit_vector_in_dir/=sqrt( unit_vector_in_dir.normSquare() );
247      //       std::cout << " = " << unit_vector_in_dir << std::endl;
248
249      xy<gdouble> unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x);
250      //       std::cout << unit_norm_vector << std::endl;
251
252      {     
253        //       /\       // top
254        //      /  \      //
255        //      -  -      // c(enter)l(eft), ccl, ccr, cr
256        //       ||       //
257        //       ||       // b(ottom)l, br
258      }
259
260      double size=3;
261
262      xy<gdouble> bl (center - unit_vector_in_dir * 3 * size + unit_norm_vector * size );
263      xy<gdouble> br (center - unit_vector_in_dir * 3 * size - unit_norm_vector * size );
264      xy<gdouble> ccl(center + unit_vector_in_dir *  size + unit_norm_vector * size );
265      xy<gdouble> ccr(center + unit_vector_in_dir *  size - unit_norm_vector * size );
266      xy<gdouble> cl (center + unit_vector_in_dir *  size + unit_norm_vector * 2 * size );
267      xy<gdouble> cr (center + unit_vector_in_dir *  size - unit_norm_vector * 2 * size );
268      xy<gdouble> top(center + unit_vector_in_dir * 3 * size);
269         
270      //       std::cout << bl << " " << br << " " << ccl << " "  << ccr << " " << cl << " " << cr << " " << top << std::endl;
271
272      Gnome::Canvas::Points arrow_points;
273      arrow_points.push_back(Gnome::Art::Point( bl.x , bl.y  ) );
274      arrow_points.push_back(Gnome::Art::Point( br.x , br.y  ) );
275      arrow_points.push_back(Gnome::Art::Point( ccr.x, ccr.y ) );
276      arrow_points.push_back(Gnome::Art::Point( cr.x , cr.y  ) );
277      arrow_points.push_back(Gnome::Art::Point( top.x, top.y ) );
278      arrow_points.push_back(Gnome::Art::Point( cl.x , cl.y  ) );
279      arrow_points.push_back(Gnome::Art::Point( ccl.x, ccl.y ) );
280
281      arrow->property_points().set_value(arrow_points);
282    }
283}
284
285bool BrokenEdge::edgeFormerEventHandler(GdkEvent* e)
286{
287  switch(e->type)
288    {
289    case GDK_BUTTON_PRESS:
290      //we mark the location of the event to be able to calculate parameters of dragging
291      if(gdc.getActualTool()!=CREATE_NODE)
292        {
293          gdc.toggleEdgeActivity(this, true);
294          clicked_x=e->button.x;
295          clicked_y=e->button.y;
296          isbutton=true;
297        }
298      break;
299    case GDK_BUTTON_RELEASE:
300      if(gdc.getActualTool()!=CREATE_NODE)
301        {
302          gdc.toggleEdgeActivity(this, false);
303          isbutton=false;
304        }
305      break;
306    case GDK_MOTION_NOTIFY:
307      //we only have to do sg. if the mouse button is pressed
308      if(isbutton)
309        {
310          //new coordinates will be the old values,
311          //because the item will be moved to the
312          //new coordinate therefore the new movement
313          //has to be calculated from here
314
315          double dx=e->motion.x-clicked_x;
316          double dy=e->motion.y-clicked_y;
317
318          Gnome::Canvas::Points points_new;
319
320          points_new.push_back(my_points[0]);
321          points_new.push_back(my_points[1]=Gnome::Art::Point(my_points[1].get_x()+dx,my_points[1].get_y()+dy));
322          points_new.push_back(my_points[2]);
323
324          setPoints(points_new);
325          gdc.textReposition(xy<double>(my_points[1].get_x(),my_points[1].get_y()));
326
327          clicked_x=e->motion.x;
328          clicked_y=e->motion.y;
329
330        }
331    default: break;
332    }
333
334  return true;
335}
336
337xy<double> BrokenEdge::getArrowPos()
338{
339  xy<double> ret_val(my_points[1].get_x(),my_points[1].get_y());
340  return ret_val;
341}
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