gui/gdc-broken_edge.cc
author deba
Thu, 23 Feb 2006 08:55:54 +0000
changeset 1980 a954b780e3ab
parent 1831 75ab76fc4bf2
permissions -rw-r--r--
Renaming to be convient to the naming of the adaptors
Concept checking of the ugraph adaptors
     1 #include "graph_displayer_canvas.h"
     2 #include <cmath>
     3 
     4 GraphDisplayerCanvas::BrokenEdge::BrokenEdge(Gnome::Canvas::Group & g, Edge _edge, GraphDisplayerCanvas & gc) : Line(g), edge(_edge), gdc(gc), isbutton(false)
     5 {
     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();
    10   draw();
    11 }
    12 
    13 GraphDisplayerCanvas::BrokenEdge::~BrokenEdge()
    14 {
    15   if(arrow)delete(arrow);
    16 }
    17 
    18 void GraphDisplayerCanvas::BrokenEdge::draw()
    19 {
    20   MapStorage& ms = gdc.mytab.mapstorage;
    21 
    22   // update the edge
    23   {
    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);
    34   }
    35 
    36   // update the arrow
    37   {
    38     //calculating coordinates of the direction indicator arrow
    39     XY target(ms.coords[ms.graph.target(edge)]);
    40     XY center(ms.arrow_pos[edge]);
    41 
    42     XY unit_vector_in_dir(target-center);
    43     double length=sqrt( unit_vector_in_dir.normSquare() );
    44 
    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;
    48 
    49     XY unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x);
    50     //       std::cout << unit_norm_vector << std::endl;
    51 
    52     {      
    53       //       /\       // top
    54       //      /  \      //
    55       //      -  -      // c(enter)l(eft), ccl, ccr, cr
    56       //       ||       //
    57       //       ||       // b(ottom)l, br
    58     }
    59 
    60     double size=3;
    61 
    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);
    69 
    70     //std::cout << bl << " " << br << " " << ccl << " "  << ccr << " " << cl << " " << cr << " " << top << std::endl;
    71 
    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 ) );
    80 
    81     arrow->property_points().set_value(arrow_points);
    82   }
    83 }
    84 
    85 bool GraphDisplayerCanvas::BrokenEdge::edgeFormerEventHandler(GdkEvent* e)
    86 {
    87   switch(e->type)
    88     {
    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)
    92 	{
    93 	  gdc.toggleEdgeActivity(this, true);
    94 	  clicked_x=e->button.x;
    95 	  clicked_y=e->button.y;
    96 	  isbutton=true;
    97 	}
    98       break;
    99     case GDK_BUTTON_RELEASE:
   100       if(gdc.getActualTool()!=CREATE_NODE)
   101 	{
   102 	  gdc.toggleEdgeActivity(this, false);
   103 	  isbutton=false;
   104 	}
   105       break;
   106     case GDK_MOTION_NOTIFY:
   107       //we only have to do sg. if the mouse button is pressed
   108       if(isbutton)
   109 	{
   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
   114 
   115 	  double dx=e->motion.x-clicked_x;
   116 	  double dy=e->motion.y-clicked_y;
   117 
   118 	  Gnome::Canvas::Points points_new;
   119 
   120           gdc.mytab.mapstorage.arrow_pos.set(edge, gdc.mytab.mapstorage.arrow_pos[edge] + XY(dx, dy));
   121 
   122 	  draw();
   123 	  gdc.textReposition(gdc.mytab.mapstorage.arrow_pos[edge]);
   124 
   125 	  clicked_x=e->motion.x;
   126 	  clicked_y=e->motion.y;
   127 
   128 	}
   129     default: break;
   130     }
   131 
   132   return true;
   133 }