bundles/org.simantics.g2d/src/org/simantics/g2d/elementclass/connection/Path2DOutlineShape.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.g2d.elementclass.connection;
  13
  14 import java.awt.Rectangle;
  15 import java.awt.Shape;
  16 import java.awt.geom.AffineTransform;
  17 import java.awt.geom.Path2D;
  18 import java.awt.geom.PathIterator;
  19 import java.awt.geom.Point2D;
  20 import java.awt.geom.Rectangle2D;
  21
  22 public class Path2DOutlineShape implements Shape {
  23
  24         Path2D path;
  25
  26         public Path2DOutlineShape(Path2D path) {
  27                 this.path = path;
  28         }
  29
  30         @Override
  31         public boolean contains(Point2D p) {
  32                 return false;
  33         }
  34
  35         @Override
  36         public boolean contains(Rectangle2D r) {
  37                 return false;
  38         }
  39
  40         @Override
  41         public boolean contains(double x, double y) {
  42                 return false;
  43         }
  44
  45         @Override
  46         public boolean contains(double x, double y, double w, double h) {
  47                 return false;
  48         }
  49
  50         @Override
  51         public Rectangle getBounds() {
  52                 return path.getBounds();
  53         }
  54
  55         @Override
  56         public Rectangle2D getBounds2D() {
  57                 return path.getBounds2D();
  58         }
  59
  60         @Override
  61         public PathIterator getPathIterator(AffineTransform at) {
  62                 return path.getPathIterator(at);
  63         }
  64
  65         @Override
  66         public PathIterator getPathIterator(AffineTransform at, double flatness) {
  67                 return path.getPathIterator(at, flatness);
  68         }
  69
  70         @Override
  71         public boolean intersects(Rectangle2D r) {
  72                 return intersects(r.getX(), r.getY(), r.getWidth(), r.getHeight());
  73         }
  74
  75         @Override
  76         public boolean intersects(double x, double y, double w, double h) {
  77                 PathIterator it = path.getPathIterator(new AffineTransform(), 1.0);
  78                 double[] coords = new double[2];
  79                 double x0, y0, x1=0.0, y1=0.0;
  80                 while(!it.isDone()) {
  81                         x0 = x1;
  82                         y0 = y1;
  83                         switch(it.currentSegment(coords)) {
  84                         case PathIterator.SEG_MOVETO:
  85                                 x1 = coords[0];
  86                                 y1 = coords[1];
  87                                 break;
  88
  89                         case PathIterator.SEG_LINETO:
  90                                 x1 = coords[0];
  91                                 y1 = coords[1];
  92
  93                                 // Lines are approximated by their bounding boxes. This works for
  94                                 // orthogonal paths.
  95                                 if(x0 < x1) {
  96                                         if(x > x1 || x+w < x0)
  97                                                 break;
  98                                 }
  99                                 else {
 100                                         if(x > x0 || x+w < x1)
 101                                                 break;
 102                                 }
 103
 104                                 if(y0 < y1) {
 105                                         if(y > y1 || y+h < y0)
 106                                                 break;
 107                                 }
 108                                 else {
 109                                         if(y > y0 || y+h < y1)
 110                                                 break;
 111                                 }
 112                                 return true;
 113                         }
 114                         it.next();
 115                 }
 116                 return false;
 117         }
 118
 119 }