alpar@174: /* -*- C++ -*-
alpar@174:  *
alpar@174:  * This file is a part of LEMON, a generic C++ optimization library
alpar@174:  *
alpar@174:  * Copyright (C) 2003-2006
alpar@174:  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@174:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@174:  *
alpar@174:  * Permission to use, modify and distribute this software is granted
alpar@174:  * provided that this copyright notice appears in all copies. For
alpar@174:  * precise terms see the accompanying LICENSE file.
alpar@174:  *
alpar@174:  * This software is provided "AS IS" with no warranty of any kind,
alpar@174:  * express or implied, and with no claim as to its suitability for any
alpar@174:  * purpose.
alpar@174:  *
alpar@174:  */
alpar@174: 
hegyi@89: #include "graph_displayer_canvas.h"
alpar@59: #include <cmath>
hegyi@17: 
ladanyi@147: GraphDisplayerCanvas::EdgeBase::EdgeBase(Gnome::Canvas::Group& _group, Edge _edge, GraphDisplayerCanvas& _canvas) : 
ladanyi@147:   Gnome::Canvas::Group(_group), edge(_edge), canvas(_canvas), arrow(*this)
hegyi@17: {
ladanyi@147:   arrow.property_fill_color().set_value("red");
ladanyi@147:   arrow.lower_to_bottom();
ladanyi@152:   lower_to_bottom();
ladanyi@147: }
ladanyi@147: 
ladanyi@147: GraphDisplayerCanvas::EdgeBase::~EdgeBase()
ladanyi@147: {
ladanyi@147: }
ladanyi@147: 
ladanyi@147: void GraphDisplayerCanvas::EdgeBase::drawArrow(XY unit_vector_in_dir)
ladanyi@147: {
ladanyi@147:   MapStorage& ms = canvas.mytab.mapstorage;
ladanyi@147:   XY center(ms.arrow_pos[edge]);
ladanyi@147:   XY unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x);
ladanyi@147: 
ladanyi@147:   //       /\       // top
ladanyi@147:   //      /  \      //
ladanyi@147:   //      -  -      // c(enter)l(eft), ccl, ccr, cr
ladanyi@147:   //       ||       //
ladanyi@147:   //       ||       // b(ottom)l, br
ladanyi@147: 
ladanyi@147:   double size=3;
ladanyi@147: 
ladanyi@147:   XY bl (center - unit_vector_in_dir * 3 * size + unit_norm_vector * size );
ladanyi@147:   XY br (center - unit_vector_in_dir * 3 * size - unit_norm_vector * size );
ladanyi@147:   XY ccl(center + unit_vector_in_dir *  size + unit_norm_vector * size );
ladanyi@147:   XY ccr(center + unit_vector_in_dir *  size - unit_norm_vector * size );
ladanyi@147:   XY cl (center + unit_vector_in_dir *  size + unit_norm_vector * 2 * size );
ladanyi@147:   XY cr (center + unit_vector_in_dir *  size - unit_norm_vector * 2 * size );
ladanyi@147:   XY top(center + unit_vector_in_dir * 3 * size);
ladanyi@147: 
ladanyi@147:   Gnome::Canvas::Points arrow_points;
ladanyi@147:   arrow_points.push_back(Gnome::Art::Point( bl.x , bl.y  ) );
ladanyi@147:   arrow_points.push_back(Gnome::Art::Point( br.x , br.y  ) );
ladanyi@147:   arrow_points.push_back(Gnome::Art::Point( ccr.x, ccr.y ) );
ladanyi@147:   arrow_points.push_back(Gnome::Art::Point( cr.x , cr.y  ) );
ladanyi@147:   arrow_points.push_back(Gnome::Art::Point( top.x, top.y ) );
ladanyi@147:   arrow_points.push_back(Gnome::Art::Point( cl.x , cl.y  ) );
ladanyi@147:   arrow_points.push_back(Gnome::Art::Point( ccl.x, ccl.y ) );
ladanyi@147: 
ladanyi@147:   arrow.property_points().set_value(arrow_points);
ladanyi@147: }
ladanyi@147: 
ladanyi@147: GraphDisplayerCanvas::BrokenEdge::BrokenEdge(Gnome::Canvas::Group & g,
ladanyi@147:     Edge _edge, GraphDisplayerCanvas & gc) : EdgeBase(g, _edge, gc),
ladanyi@147:   isbutton(false), line(*this)
ladanyi@147: {
ladanyi@147:   arrow.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::BrokenEdge::edgeFormerEventHandler));
ladanyi@147: 
ladanyi@147:   line.property_fill_color().set_value("green");
ladanyi@147:   line.property_width_units().set_value(10);    
ladanyi@147:   line.lower_to_bottom();
ladanyi@147: 
ladanyi@98:   draw();
hegyi@19: }
hegyi@19: 
hegyi@89: GraphDisplayerCanvas::BrokenEdge::~BrokenEdge()
hegyi@19: {
hegyi@19: }
hegyi@19: 
ladanyi@98: void GraphDisplayerCanvas::BrokenEdge::draw()
hegyi@19: {
ladanyi@147:   MapStorage& ms = canvas.mytab.mapstorage;
ladanyi@147: 
ladanyi@147:   //calculating coordinates of the direction indicator arrow
ladanyi@147:   XY head(ms.coords[ms.graph.target(edge)]);
ladanyi@147:   XY center(ms.arrow_pos[edge]);
ladanyi@147: 
ladanyi@147:   XY unit_vector_in_dir(head-center);
ladanyi@147:   double length=sqrt( unit_vector_in_dir.normSquare() );
ladanyi@147: 
ladanyi@147:   unit_vector_in_dir/=length;
ladanyi@147: 
ladanyi@147:   // update the arrow
ladanyi@147:   drawArrow(unit_vector_in_dir);
ladanyi@98: 
ladanyi@98:   // update the edge
ladanyi@147:   Gnome::Canvas::Points points;
ladanyi@147:   Node source = ms.graph.source(edge);
ladanyi@147:   Node target = ms.graph.target(edge);
ladanyi@147:   points.push_back(Gnome::Art::Point(ms.coords[source].x,
ladanyi@147:         ms.coords[source].y));
ladanyi@147:   points.push_back(Gnome::Art::Point(ms.arrow_pos[edge].x,
ladanyi@147:         ms.arrow_pos[edge].y));
ladanyi@147:   points.push_back(Gnome::Art::Point(ms.coords[target].x,
ladanyi@147:         ms.coords[target].y));
ladanyi@147:   line.property_points().set_value(points);
hegyi@17: }
hegyi@19: 
hegyi@89: bool GraphDisplayerCanvas::BrokenEdge::edgeFormerEventHandler(GdkEvent* e)
hegyi@19: {
hegyi@19:   switch(e->type)
ladanyi@147:   {
hegyi@19:     case GDK_BUTTON_PRESS:
ladanyi@147:       //we mark the location of the event to be able to calculate parameters
ladanyi@147:       //of dragging
ladanyi@147:       if(canvas.getActualTool()!=CREATE_NODE)
ladanyi@147:       {
ladanyi@147:         canvas.toggleEdgeActivity(this, true);
ladanyi@147:         clicked_x=e->button.x;
ladanyi@147:         clicked_y=e->button.y;
ladanyi@147:         isbutton=true;
ladanyi@147:       }
hegyi@19:       break;
hegyi@19:     case GDK_BUTTON_RELEASE:
ladanyi@147:       if(canvas.getActualTool()!=CREATE_NODE)
ladanyi@147:       {
ladanyi@147:         canvas.toggleEdgeActivity(this, false);
ladanyi@147:         isbutton=false;
ladanyi@147:       }
hegyi@19:       break;
hegyi@19:     case GDK_MOTION_NOTIFY:
hegyi@19:       //we only have to do sg. if the mouse button is pressed
hegyi@19:       if(isbutton)
ladanyi@147:       {
ladanyi@147:         //new coordinates will be the old values,
ladanyi@147:         //because the item will be moved to the
ladanyi@147:         //new coordinate therefore the new movement
ladanyi@147:         //has to be calculated from here
hegyi@19: 
ladanyi@147:         double dx=e->motion.x-clicked_x;
ladanyi@147:         double dy=e->motion.y-clicked_y;
hegyi@19: 
ladanyi@147:         Gnome::Canvas::Points points_new;
hegyi@19: 
ladanyi@147:         canvas.mytab.mapstorage.arrow_pos.set(edge, canvas.mytab.mapstorage.arrow_pos[edge] + XY(dx, dy));
hegyi@19: 
ladanyi@147:         draw();
ladanyi@147:         canvas.textReposition(canvas.mytab.mapstorage.arrow_pos[edge]);
hegyi@19: 
ladanyi@147:         clicked_x=e->motion.x;
ladanyi@147:         clicked_y=e->motion.y;
hegyi@19: 
ladanyi@147:       }
hegyi@19:     default: break;
ladanyi@147:   }
hegyi@19: 
hegyi@19:   return true;
hegyi@19: }
ladanyi@147: 
ladanyi@147: void GraphDisplayerCanvas::BrokenEdge::setLineWidth(int w)
ladanyi@147: {
ladanyi@147:   line.property_width_units().set_value(w);
ladanyi@147: }
ladanyi@147: 
ladanyi@147: void GraphDisplayerCanvas::BrokenEdge::setFillColor(Gdk::Color c)
ladanyi@147: {
ladanyi@147:   line.property_fill_color_gdk().set_value(c);
ladanyi@147: }
ladanyi@147: 
ladanyi@147: GraphDisplayerCanvas::LoopEdge::LoopEdge(Gnome::Canvas::Group& _group,
ladanyi@147:     Edge _edge, GraphDisplayerCanvas& _canvas) :
ladanyi@151:   EdgeBase(_group, _edge, _canvas), line(*this), isbutton(false)
ladanyi@147: {
ladanyi@151:   arrow.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::LoopEdge::edgeFormerEventHandler));
ladanyi@151: 
ladanyi@151:   line.property_outline_color().set_value("green");
ladanyi@151:   line.property_width_units().set_value(10);
ladanyi@147:   line.lower_to_bottom();
ladanyi@147: 
ladanyi@147:   draw();
ladanyi@147: }
ladanyi@147: 
ladanyi@147: GraphDisplayerCanvas::LoopEdge::~LoopEdge()
ladanyi@147: {
ladanyi@147: }
ladanyi@147: 
ladanyi@147: void GraphDisplayerCanvas::LoopEdge::draw()
ladanyi@147: {
ladanyi@147:   MapStorage& ms = canvas.mytab.mapstorage;
ladanyi@147: 
ladanyi@147:   Node node = ms.graph.source(edge);
ladanyi@147:   XY center = (ms.coords[node] + ms.arrow_pos[edge]) / 2.0;
ladanyi@147: 
ladanyi@147:   XY unit_vector_in_dir(rot90(center - ms.arrow_pos[edge]));
ladanyi@147:   double length = sqrt(unit_vector_in_dir.normSquare());
ladanyi@147:   unit_vector_in_dir /= length;
ladanyi@147: 
ladanyi@147:   drawArrow(unit_vector_in_dir);
ladanyi@147: 
ladanyi@147:   double radius =
ladanyi@147:     sqrt((ms.arrow_pos[edge] - ms.coords[node]).normSquare()) / 2.0;
ladanyi@147: 
ladanyi@147:   XY p1 = center + XY(-radius,  radius);
ladanyi@147:   XY p2 = center + XY( radius, -radius);
ladanyi@147:   line.property_x1().set_value(p1.x);
ladanyi@147:   line.property_y1().set_value(p1.y);
ladanyi@147:   line.property_x2().set_value(p2.x);
ladanyi@147:   line.property_y2().set_value(p2.y);
ladanyi@147: }
ladanyi@147: 
ladanyi@147: void GraphDisplayerCanvas::LoopEdge::setLineWidth(int w)
ladanyi@147: {
ladanyi@147:   line.property_width_units().set_value(w);
ladanyi@147: }
ladanyi@147: 
ladanyi@147: void GraphDisplayerCanvas::LoopEdge::setFillColor(Gdk::Color c)
ladanyi@147: {
ladanyi@151:   line.property_outline_color_gdk().set_value(c);
ladanyi@147: }
ladanyi@151: 
ladanyi@151: bool GraphDisplayerCanvas::LoopEdge::edgeFormerEventHandler(GdkEvent* e)
ladanyi@151: {
ladanyi@151:   switch(e->type)
ladanyi@151:   {
ladanyi@151:     case GDK_BUTTON_PRESS:
ladanyi@151:       if(canvas.getActualTool()!=CREATE_NODE)
ladanyi@151:       {
ladanyi@151:         canvas.toggleEdgeActivity(this, true);
ladanyi@151:         isbutton=true;
ladanyi@151:       }
ladanyi@151:       break;
ladanyi@151:     case GDK_BUTTON_RELEASE:
ladanyi@151:       if(canvas.getActualTool()!=CREATE_NODE)
ladanyi@151:       {
ladanyi@151:         canvas.toggleEdgeActivity(this, false);
ladanyi@151:         isbutton=false;
ladanyi@151:       }
ladanyi@151:       break;
ladanyi@151:     case GDK_MOTION_NOTIFY:
ladanyi@151:       if(isbutton)
ladanyi@151:       {
ladanyi@151:         canvas.mytab.mapstorage.arrow_pos.set(edge, XY(e->motion.x, e->motion.y));
ladanyi@151: 
ladanyi@151:         draw();
ladanyi@151:         canvas.textReposition(canvas.mytab.mapstorage.arrow_pos[edge]);
ladanyi@151:       }
ladanyi@151:     default: break;
ladanyi@151:   }
ladanyi@151:   return true;
ladanyi@151: }