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