hegyi@1: /* -*- C++ -*-
hegyi@1:  *
hegyi@1:  * This file is a part of LEMON, a generic C++ optimization library
hegyi@1:  *
hegyi@1:  * Copyright (C) 2003-2006
hegyi@1:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
hegyi@1:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
hegyi@1:  *
hegyi@1:  * Permission to use, modify and distribute this software is granted
hegyi@1:  * provided that this copyright notice appears in all copies. For
hegyi@1:  * precise terms see the accompanying LICENSE file.
hegyi@1:  *
hegyi@1:  * This software is provided "AS IS" with no warranty of any kind,
hegyi@1:  * express or implied, and with no claim as to its suitability for any
hegyi@1:  * purpose.
hegyi@1:  *
hegyi@1:  */
hegyi@1: 
hegyi@1: #include <graph_displayer_canvas.h>
hegyi@1: #include <mapstorage.h>
hegyi@1: #include <nbtab.h>
hegyi@1: #include <cmath>
hegyi@1: 
hegyi@1: DigraphDisplayerCanvas::ArcBase::ArcBase(Gnome::Canvas::Group& _group, Arc _arc, DigraphDisplayerCanvas& _canvas) : 
hegyi@1:   Gnome::Canvas::Group(_group), arc(_arc), canvas(_canvas), arrow(*this)
hegyi@1: {
hegyi@1:   arrow.property_fill_color().set_value("red");
hegyi@1:   arrow.lower_to_bottom();
hegyi@1:   lower_to_bottom();
hegyi@1: }
hegyi@1: 
hegyi@1: DigraphDisplayerCanvas::ArcBase::~ArcBase()
hegyi@1: {
hegyi@1: }
hegyi@1: 
hegyi@1: void DigraphDisplayerCanvas::ArcBase::drawArrow(XY unit_vector_in_dir)
hegyi@1: {
hegyi@1:   MapStorage& ms = *canvas.mytab.mapstorage;
hegyi@1:   XY center(ms.getArrowCoords(arc));
hegyi@1:   XY unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x);
hegyi@1: 
hegyi@1:   //       /\       // top
hegyi@1:   //      /  \      //
hegyi@1:   //      -  -      // c(enter)l(eft), ccl, ccr, cr
hegyi@1:   //       ||       //
hegyi@1:   //       ||       // b(ottom)l, br
hegyi@1: 
hegyi@1:   double size=3;
hegyi@1: 
hegyi@1:   XY bl (center - unit_vector_in_dir * 3 * size + unit_norm_vector * size );
hegyi@1:   XY br (center - unit_vector_in_dir * 3 * size - unit_norm_vector * size );
hegyi@1:   XY ccl(center + unit_vector_in_dir *  size + unit_norm_vector * size );
hegyi@1:   XY ccr(center + unit_vector_in_dir *  size - unit_norm_vector * size );
hegyi@1:   XY cl (center + unit_vector_in_dir *  size + unit_norm_vector * 2 * size );
hegyi@1:   XY cr (center + unit_vector_in_dir *  size - unit_norm_vector * 2 * size );
hegyi@1:   XY top(center + unit_vector_in_dir * 3 * size);
hegyi@1: 
hegyi@1:   Gnome::Canvas::Points arrow_points;
hegyi@1:   arrow_points.push_back(Gnome::Art::Point( bl.x , bl.y  ) );
hegyi@1:   arrow_points.push_back(Gnome::Art::Point( br.x , br.y  ) );
hegyi@1:   arrow_points.push_back(Gnome::Art::Point( ccr.x, ccr.y ) );
hegyi@1:   arrow_points.push_back(Gnome::Art::Point( cr.x , cr.y  ) );
hegyi@1:   arrow_points.push_back(Gnome::Art::Point( top.x, top.y ) );
hegyi@1:   arrow_points.push_back(Gnome::Art::Point( cl.x , cl.y  ) );
hegyi@1:   arrow_points.push_back(Gnome::Art::Point( ccl.x, ccl.y ) );
hegyi@1: 
hegyi@1:   arrow.property_points().set_value(arrow_points);
hegyi@1: }
hegyi@1: 
hegyi@1: DigraphDisplayerCanvas::BrokenArc::BrokenArc(Gnome::Canvas::Group & g,
hegyi@1:     Arc _arc, DigraphDisplayerCanvas & gc) : ArcBase(g, _arc, gc),
hegyi@1:   isbutton(false), line(*this)
hegyi@1: {
hegyi@1:   arrow.signal_event().connect(sigc::mem_fun(*this, &DigraphDisplayerCanvas::BrokenArc::arcFormerEventHandler));
hegyi@1: 
hegyi@1:   line.property_fill_color().set_value("green");
hegyi@1:   line.property_width_units().set_value(10);    
hegyi@1:   line.lower_to_bottom();
hegyi@1: 
hegyi@1:   draw();
hegyi@1: }
hegyi@1: 
hegyi@1: DigraphDisplayerCanvas::BrokenArc::~BrokenArc()
hegyi@1: {
hegyi@1: }
hegyi@1: 
hegyi@1: void DigraphDisplayerCanvas::BrokenArc::draw()
hegyi@1: {
hegyi@1:   MapStorage& ms = *canvas.mytab.mapstorage;
hegyi@1: 
hegyi@1:   //calculating coordinates of the direction indicator arrow
hegyi@1:   XY head(ms.getNodeCoords(ms.digraph.target(arc)));
hegyi@1:   XY center(ms.getArrowCoords(arc));
hegyi@1: 
hegyi@1:   XY unit_vector_in_dir(head-center);
hegyi@1:   double length=sqrt( unit_vector_in_dir.normSquare() );
hegyi@1: 
hegyi@1:   if(length!=0)
hegyi@1:     {
hegyi@1:       unit_vector_in_dir/=length;
hegyi@1:     }
hegyi@1: 
hegyi@1:   // update the arrow
hegyi@1:   drawArrow(unit_vector_in_dir);
hegyi@1: 
hegyi@1:   // update the arc
hegyi@1:   Gnome::Canvas::Points points;
hegyi@1:   Node source = ms.digraph.source(arc);
hegyi@1:   Node target = ms.digraph.target(arc);
hegyi@1:   points.push_back(Gnome::Art::Point(ms.getNodeCoords(source).x,
hegyi@1:         ms.getNodeCoords(source).y));
hegyi@1:   points.push_back(Gnome::Art::Point(ms.getArrowCoords(arc).x,
hegyi@1:         ms.getArrowCoords(arc).y));
hegyi@1:   points.push_back(Gnome::Art::Point(ms.getNodeCoords(target).x,
hegyi@1:         ms.getNodeCoords(target).y));
hegyi@1:   line.property_points().set_value(points);
hegyi@1: }
hegyi@1: 
hegyi@1: bool DigraphDisplayerCanvas::BrokenArc::arcFormerEventHandler(GdkEvent* e)
hegyi@1: {
hegyi@1:   switch(e->type)
hegyi@1:   {
hegyi@1:     case GDK_BUTTON_PRESS:
hegyi@1:       //we mark the location of the event to be able to calculate parameters
hegyi@1:       //of dragging
hegyi@1:       if(canvas.getActualTool()!=CREATE_NODE)
hegyi@1:       {
hegyi@1:         canvas.toggleArcActivity(this, true);
hegyi@1:         clicked_x=e->button.x;
hegyi@1:         clicked_y=e->button.y;
hegyi@1:         isbutton=true;
hegyi@1:       }
hegyi@1:       break;
hegyi@1:     case GDK_BUTTON_RELEASE:
hegyi@1:       if(canvas.getActualTool()!=CREATE_NODE)
hegyi@1:       {
hegyi@1:         canvas.toggleArcActivity(this, false);
hegyi@1:         isbutton=false;
hegyi@1:       }
hegyi@1:       break;
hegyi@1:     case GDK_MOTION_NOTIFY:
hegyi@1:       //we only have to do sg. if the mouse button is pressed
hegyi@1:       if(isbutton)
hegyi@1:       {
hegyi@1:         //new coordinates will be the old values,
hegyi@1:         //because the item will be moved to the
hegyi@1:         //new coordinate therefore the new movement
hegyi@1:         //has to be calculated from here
hegyi@1: 
hegyi@1:         double dx=e->motion.x-clicked_x;
hegyi@1:         double dy=e->motion.y-clicked_y;
hegyi@1: 
hegyi@1:         Gnome::Canvas::Points points_new;
hegyi@1: 
hegyi@1:         canvas.mytab.mapstorage->setArrowCoords(arc, canvas.mytab.mapstorage->getArrowCoords(arc) + XY(dx, dy));
hegyi@1: 
hegyi@1:         draw();
hegyi@1:         canvas.textReposition(canvas.mytab.mapstorage->getArrowCoords(arc));
hegyi@1: 
hegyi@1:         clicked_x=e->motion.x;
hegyi@1:         clicked_y=e->motion.y;
hegyi@1: 
hegyi@1:       }
hegyi@1:     default: break;
hegyi@1:   }
hegyi@1: 
hegyi@1:   return true;
hegyi@1: }
hegyi@1: 
hegyi@1: void DigraphDisplayerCanvas::BrokenArc::setLineWidth(int w)
hegyi@1: {
hegyi@1:   line.property_width_units().set_value(w);
hegyi@1: }
hegyi@1: 
hegyi@1: void DigraphDisplayerCanvas::BrokenArc::setFillColor(Gdk::Color c)
hegyi@1: {
hegyi@1:   line.property_fill_color_gdk().set_value(c);
hegyi@1: }
hegyi@1: 
hegyi@1: DigraphDisplayerCanvas::LoopArc::LoopArc(Gnome::Canvas::Group& _group,
hegyi@1:     Arc _arc, DigraphDisplayerCanvas& _canvas) :
hegyi@1:   ArcBase(_group, _arc, _canvas), line(*this), isbutton(false)
hegyi@1: {
hegyi@1:   arrow.signal_event().connect(sigc::mem_fun(*this, &DigraphDisplayerCanvas::LoopArc::arcFormerEventHandler));
hegyi@1: 
hegyi@1:   line.property_outline_color().set_value("green");
hegyi@1:   line.property_width_units().set_value(10);
hegyi@1:   line.lower_to_bottom();
hegyi@1: 
hegyi@1:   draw();
hegyi@1: }
hegyi@1: 
hegyi@1: DigraphDisplayerCanvas::LoopArc::~LoopArc()
hegyi@1: {
hegyi@1: }
hegyi@1: 
hegyi@1: void DigraphDisplayerCanvas::LoopArc::draw()
hegyi@1: {
hegyi@1:   MapStorage& ms = *canvas.mytab.mapstorage;
hegyi@1: 
hegyi@1:   Node node = ms.digraph.source(arc);
hegyi@1:   XY center = (ms.getNodeCoords(node) + ms.getArrowCoords(arc)) / 2.0;
hegyi@1: 
hegyi@1:   XY unit_vector_in_dir(rot90(center - ms.getArrowCoords(arc)));
hegyi@1:   double length = sqrt(unit_vector_in_dir.normSquare());
hegyi@1:   unit_vector_in_dir /= length;
hegyi@1: 
hegyi@1:   drawArrow(unit_vector_in_dir);
hegyi@1: 
hegyi@1:   double radius =
hegyi@1:     sqrt((ms.getArrowCoords(arc) - ms.getNodeCoords(node)).normSquare()) / 2.0;
hegyi@1: 
hegyi@1:   XY p1 = center + XY(-radius,  radius);
hegyi@1:   XY p2 = center + XY( radius, -radius);
hegyi@1:   line.property_x1().set_value(p1.x);
hegyi@1:   line.property_y1().set_value(p1.y);
hegyi@1:   line.property_x2().set_value(p2.x);
hegyi@1:   line.property_y2().set_value(p2.y);
hegyi@1: }
hegyi@1: 
hegyi@1: void DigraphDisplayerCanvas::LoopArc::setLineWidth(int w)
hegyi@1: {
hegyi@1:   line.property_width_units().set_value(w);
hegyi@1: }
hegyi@1: 
hegyi@1: void DigraphDisplayerCanvas::LoopArc::setFillColor(Gdk::Color c)
hegyi@1: {
hegyi@1:   line.property_outline_color_gdk().set_value(c);
hegyi@1: }
hegyi@1: 
hegyi@1: bool DigraphDisplayerCanvas::LoopArc::arcFormerEventHandler(GdkEvent* e)
hegyi@1: {
hegyi@1:   switch(e->type)
hegyi@1:   {
hegyi@1:     case GDK_BUTTON_PRESS:
hegyi@1:       if(canvas.getActualTool()!=CREATE_NODE)
hegyi@1:       {
hegyi@1:         canvas.toggleArcActivity(this, true);
hegyi@1:         isbutton=true;
hegyi@1:       }
hegyi@1:       break;
hegyi@1:     case GDK_BUTTON_RELEASE:
hegyi@1:       if(canvas.getActualTool()!=CREATE_NODE)
hegyi@1:       {
hegyi@1:         canvas.toggleArcActivity(this, false);
hegyi@1:         isbutton=false;
hegyi@1:       }
hegyi@1:       break;
hegyi@1:     case GDK_MOTION_NOTIFY:
hegyi@1:       if(isbutton)
hegyi@1:       {
hegyi@1:         canvas.mytab.mapstorage->setArrowCoords(arc, XY(e->motion.x, e->motion.y));
hegyi@1: 
hegyi@1:         draw();
hegyi@1:         canvas.textReposition(canvas.mytab.mapstorage->getArrowCoords(arc));
hegyi@1:       }
hegyi@1:     default: break;
hegyi@1:   }
hegyi@1:   return true;
hegyi@1: }