bundles/org.simantics.diagram.connection/src/org/simantics/diagram/connection/rendering/StyledRouteGraphRenderer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2011 Association for Decentralized Information Management in
   3  * 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.diagram.connection.rendering;
  13
  14 import gnu.trove.set.hash.THashSet;
  15
  16 import java.awt.BasicStroke;
  17 import java.awt.Color;
  18 import java.awt.Graphics2D;
  19 import java.awt.geom.Path2D;
  20 import java.io.Serializable;
  21 import java.util.List;
  22
  23 import org.simantics.diagram.connection.RouteGraph;
  24 import org.simantics.diagram.connection.RouteLine;
  25 import org.simantics.diagram.connection.RoutePoint;
  26 import org.simantics.diagram.connection.RouteTerminal;
  27 import org.simantics.diagram.connection.rendering.arrows.ILineEndStyle;
  28
  29
  30 public class StyledRouteGraphRenderer implements IRouteGraphRenderer, Serializable {
  31
  32     private static final BasicStroke GUIDE_LINE_STROKE = new BasicStroke(0.1f);
  33     private static final Color GUIDE_LINE_COLOR = new Color(255,255,255);
  34
  35         private static final long serialVersionUID = 1564960933064029020L;
  36
  37         protected final ConnectionStyle style;
  38
  39         // Caches to avoid creating new objects all the time during rendering
  40         protected transient Path2D path;
  41         protected transient THashSet<RoutePoint> branchPoints;
  42
  43         public StyledRouteGraphRenderer(ConnectionStyle style) {
  44                 if (style == null)
  45                         throw new NullPointerException("null style");
  46                 this.style = style;
  47         }
  48
  49         public ConnectionStyle getStyle() {
  50                 return style;
  51         }
  52
  53         @Override
  54         public void render(Graphics2D g, RouteGraph rg) {
  55                 if (path == null)
  56                         path = new Path2D.Double();
  57                 path.reset();
  58                 rg.getPath2D(path);
  59                 style.drawPath(g, path, false);
  60
  61                 if (branchPoints == null)
  62                         branchPoints = new THashSet<RoutePoint>();
  63                 branchPoints.clear();
  64                 for(RouteLine line : rg.getLines()) {
  65                     renderLine(g, line, false);
  66                     collectBranchPoints(line, branchPoints);
  67                 }
  68                 for(RouteLine line : rg.getTransientLines()) {
  69                         renderLine(g, line, true);
  70                         collectBranchPoints(line, branchPoints);
  71                 }
  72
  73                 /*for(RouteTerminal terminal : rg.getTerminals())
  74                         terminal.render(g);*/
  75                 for(RoutePoint point : branchPoints) {
  76                         style.drawBranchPoint(g, point.getX(), point.getY());
  77                 }
  78         }
  79
  80         private static void collectBranchPoints(RouteLine line, THashSet<RoutePoint> branchPoints) {
  81                 List<RoutePoint> points = line.getPoints();
  82                 for(int i=1;i<points.size()-1;++i) {
  83                         RoutePoint point = points.get(i);
  84                         branchPoints.add(point);
  85                 }
  86         }
  87
  88         private void renderLine(Graphics2D g, RouteLine line, boolean isTransient) {
  89             if(line.getPoints().size() == 0) {
  90                 System.err.println("Route line does not contain any points (data = " + line.getData() + ").");
  91                 return;
  92             }
  93                 RoutePoint p1 = line.getBegin();
  94                 RoutePoint p2 = line.getEnd();
  95                 double x1 = p1.getX();
  96                 double y1 = p1.getY();
  97                 double x2 = p2.getX();
  98                 double y2 = p2.getY();
  99                 boolean isHorizontal = line.isHorizontal();
 100 //              double length = isHorizontal ? x2-x1 : y2-y1; // original length before removing the endpoints
 101                 if(isHorizontal) {
 102                         if(p1 instanceof RouteTerminal) {
 103                                 RouteTerminal terminal = (RouteTerminal)p1;
 104                                 ILineEndStyle style = terminal.getRenderStyle();
 105                                 style.render(g, x1, y1, 2);
 106                                 x1 += style.getLineEndLength(0);
 107                         }
 108                         if(p2 instanceof RouteTerminal) {
 109                                 RouteTerminal terminal = (RouteTerminal)p2;
 110                                 ILineEndStyle style = terminal.getRenderStyle();
 111                                 style.render(g, x2, y2, 0);
 112                                 x2 -= style.getLineEndLength(2);
 113                         }
 114                 }
 115                 else {
 116                         if(p1 instanceof RouteTerminal) {
 117                                 RouteTerminal terminal = (RouteTerminal)p1;
 118                                 ILineEndStyle style = terminal.getRenderStyle();
 119                                 style.render(g, x1, y1, 3);
 120                                 y1 += style.getLineEndLength(1);
 121                         }
 122                         if(p2 instanceof RouteTerminal) {
 123                                 RouteTerminal terminal = (RouteTerminal)p2;
 124                                 ILineEndStyle style = terminal.getRenderStyle();
 125                                 style.render(g, x2, y2, 1);
 126                                 y2 -= style.getLineEndLength(3);
 127                         }
 128                 }
 129 //              if(length <= style.getDegeneratedLineLength())
 130 //                      style.drawDegeneratedLine(g, 0.5*(x1+x2), 0.5*(y1+y2), isHorizontal, isTransient);
 131 //              else
 132 //                      style.drawLine(g, x1, y1, x2, y2, isTransient);
 133         }
 134
 135         @Override
 136         public void renderGuides(Graphics2D g, RouteGraph rg) {
 137             Path2D path = new Path2D.Double();
 138         for(RouteLine line : rg.getLines()) {
 139             RoutePoint p1 = line.getBegin();
 140             RoutePoint p2 = line.getEnd();
 141             double dx = p2.getX() - p1.getX();
 142             double dy = p2.getY() - p1.getY();
 143             double adx = Math.abs(dx);
 144             double ady = Math.abs(dy);
 145             if(adx > ady) {
 146                 if(adx > 4)
 147                     dx = 0.5*dx - Math.signum(dx);
 148                 else
 149                     dx *= 0.25;
 150                 path.moveTo(p1.getX()+dx, p1.getY());
 151                 path.lineTo(p2.getX()-dx, p2.getY());
 152             }
 153             else {
 154                 if(ady > 4)
 155                     dy = 0.5*dy - Math.signum(dy);
 156                 else
 157                     dy *= 0.25;
 158                 path.moveTo(p1.getX(), p1.getY()+dy);
 159                 path.lineTo(p2.getX(), p2.getY()-dy);
 160             }
 161         }
 162         g.setStroke(GUIDE_LINE_STROKE);
 163         g.setColor(GUIDE_LINE_COLOR);
 164         g.draw(path);
 165         }
 166
 167         @Override
 168         public int hashCode() {
 169                 return style.hashCode();
 170         }
 171
 172         @Override
 173         public boolean equals(Object obj) {
 174                 if (this == obj)
 175                         return true;
 176                 if (obj == null)
 177                         return false;
 178                 if (getClass() != obj.getClass())
 179                         return false;
 180                 StyledRouteGraphRenderer other = (StyledRouteGraphRenderer) obj;
 181                 return style.equals(other.style);
 182         }
 183
 184 }