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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/PolylineConnection.d @ 16:dbfb303e8fb0

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first complete successful compile (win-only)
author Frank Benoit <benoit@tionex.de>
date Wed, 18 Mar 2009 08:56:47 +0100
parents bc29606a740c
children
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.draw2d.PolylineConnection;
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14
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15 import java.lang.all;
16
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16 import java.util.ArrayList;
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17 import java.util.List;
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18
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19 import org.eclipse.draw2d.geometry.Point;
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20 import org.eclipse.draw2d.geometry.Rectangle;
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21 import org.eclipse.draw2d.geometry.PointList;
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22 import org.eclipse.draw2d.Polyline;
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23 import org.eclipse.draw2d.Connection;
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24 import org.eclipse.draw2d.ConnectionAnchor;
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25 import org.eclipse.draw2d.AnchorListener;
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26 import org.eclipse.draw2d.ConnectionRouter;
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27 import org.eclipse.draw2d.ConnectionLocator;
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28 import org.eclipse.draw2d.RotatableDecoration;
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29 import org.eclipse.draw2d.RoutingListener;
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30 import org.eclipse.draw2d.DelegatingLayout;
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31 import org.eclipse.draw2d.IFigure;
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32 import org.eclipse.draw2d.ArrowLocator;
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33
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34 /**
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35 * An implementation of {@link Connection} based on Polyline. PolylineConnection adds
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36 * the following additional features:
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37 * <UL>
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38 * <LI>
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39 * A {@link ConnectionRouter} may be provided which will be used to determine the
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40 * connections points.
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41 * <LI>
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42 * Children may be added. The bounds calculation is extended such that the bounds is
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43 * the smallest Rectangle which is large enough to display the Polyline and all of its
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44 * children figures.
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45 * <LI>
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46 * A {@link DelegatingLayout} is set as the default layout. A delegating layout allows
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47 * children to position themselves via {@link Locator Locators}.
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48 * </UL>
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49 * <P>
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50 */
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51 public class PolylineConnection
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52 : Polyline
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53 , Connection, AnchorListener
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54 {
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55
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56 // reimplement for Connection
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57 PointList getPoints(){
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58 return super.getPoints();
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59 }
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60 // reimplement for Connection
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61 void setPoints(PointList list){
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62 super.setPoints(list);
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63 }
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64
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65
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66 private ConnectionAnchor startAnchor, endAnchor;
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67 private ConnectionRouter connectionRouter;
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68 private RotatableDecoration startArrow, endArrow;
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69
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70 private void instanceInit(){
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71 connectionRouter = ConnectionRouter_NULL;
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72 setLayoutManager(new DelegatingLayout());
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73 addPoint(new Point(0, 0));
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74 addPoint(new Point(100, 100));
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75 }
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76
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77 this(){
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78 instanceInit();
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79 }
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80 /**
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81 * Hooks the source and target anchors.
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82 * @see Figure#addNotify()
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83 */
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84 public void addNotify() {
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85 super.addNotify();
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86 hookSourceAnchor();
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87 hookTargetAnchor();
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88 }
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89
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90 /**
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91 * Appends the given routing listener to the list of listeners.
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92 * @param listener the routing listener
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93 * @since 3.2
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94 */
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95 public void addRoutingListener(RoutingListener listener) {
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96 if (auto notifier = cast(RoutingNotifier)connectionRouter ) {
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97 notifier.listeners.add(cast(Object)listener);
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98 } else
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99 connectionRouter = new RoutingNotifier(connectionRouter, listener);
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100 }
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101
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102 /**
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103 * Called by the anchors of this connection when they have moved, revalidating this
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104 * polyline connection.
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105 * @param anchor the anchor that moved
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106 */
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107 public void anchorMoved(ConnectionAnchor anchor) {
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108 revalidate();
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109 }
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110
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111 /**
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112 * Returns the bounds which holds all the points in this polyline connection. Returns any
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113 * previously existing bounds, else calculates by unioning all the children's
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114 * dimensions.
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115 * @return the bounds
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116 */
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117 public Rectangle getBounds() {
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118 if (bounds is null) {
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119 super.getBounds();
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120 for (int i = 0; i < getChildren().size(); i++) {
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121 IFigure child = cast(IFigure)getChildren().get(i);
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122 bounds.union_(child.getBounds());
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123 }
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124 }
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125 return bounds;
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126 }
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127
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128 /**
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129 * Returns the <code>ConnectionRouter</code> used to layout this connection. Will not
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130 * return <code>null</code>.
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131 * @return this connection's router
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132 */
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133 public ConnectionRouter getConnectionRouter() {
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134 if (auto n = cast(RoutingNotifier)connectionRouter )
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135 return n.realRouter;
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136 return connectionRouter;
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137 }
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138
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139 /**
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140 * Returns this connection's routing constraint from its connection router. May return
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141 * <code>null</code>.
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142 * @return the connection's routing constraint
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143 */
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144 public Object getRoutingConstraint() {
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145 if (getConnectionRouter() !is null)
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146 return getConnectionRouter().getConstraint(this);
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147 else
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148 return null;
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149 }
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150
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151 /**
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152 * @return the anchor at the start of this polyline connection (may be null)
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153 */
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154 public ConnectionAnchor getSourceAnchor() {
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155 return startAnchor;
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156 }
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157
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158 /**
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159 * @return the source decoration (may be null)
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160 */
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161 protected RotatableDecoration getSourceDecoration() {
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162 return startArrow;
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163 }
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164
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165 /**
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166 * @return the anchor at the end of this polyline connection (may be null)
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167 */
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168 public ConnectionAnchor getTargetAnchor() {
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169 return endAnchor;
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170 }
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171
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172 /**
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173 * @return the target decoration (may be null)
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174 *
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175 * @since 2.0
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176 */
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177 protected RotatableDecoration getTargetDecoration() {
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178 return endArrow;
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179 }
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180
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181 private void hookSourceAnchor() {
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182 if (getSourceAnchor() !is null)
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183 getSourceAnchor().addAnchorListener(this);
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184 }
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185
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186 private void hookTargetAnchor() {
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187 if (getTargetAnchor() !is null)
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188 getTargetAnchor().addAnchorListener(this);
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189 }
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190
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191 /**
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192 * Layouts this polyline. If the start and end anchors are present, the connection router
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193 * is used to route this, after which it is laid out. It also fires a moved method.
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194 */
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195 public void layout() {
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196 if (getSourceAnchor() !is null && getTargetAnchor() !is null)
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197 connectionRouter.route(this);
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198
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199 Rectangle oldBounds = bounds;
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200 super.layout();
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201 bounds = null;
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202
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203 if (!getBounds().contains(oldBounds)) {
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204 getParent().translateToParent(oldBounds);
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205 getUpdateManager().addDirtyRegion(getParent(), oldBounds);
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206 }
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207
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208 repaint();
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209 fireFigureMoved();
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210 }
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211
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212 /**
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213 * Called just before the receiver is being removed from its parent. Results in removing
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214 * itself from the connection router.
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215 *
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216 * @since 2.0
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217 */
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218 public void removeNotify() {
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219 unhookSourceAnchor();
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220 unhookTargetAnchor();
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221 connectionRouter.remove(this);
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222 super.removeNotify();
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223 }
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224
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225 /**
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226 * Removes the first occurence of the given listener.
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227 * @param listener the listener being removed
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228 * @since 3.2
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229 */
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230 public void removeRoutingListener(RoutingListener listener) {
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231 if ( auto notifier = cast(RoutingNotifier)connectionRouter ) {
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232 notifier.listeners.remove(cast(Object)listener);
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233 if (notifier.listeners.isEmpty())
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234 connectionRouter = notifier.realRouter;
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235 }
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236 }
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237
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238 /**
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239 * @see IFigure#revalidate()
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240 */
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241 public void revalidate() {
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242 super.revalidate();
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243 connectionRouter.invalidate(this);
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244 }
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245
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246 /**
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247 * Sets the connection router which handles the layout of this polyline. Generally set by
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248 * the parent handling the polyline connection.
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249 * @param cr the connection router
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250 */
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251 public void setConnectionRouter(ConnectionRouter cr) {
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252 if (cr is null)
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253 cr = ConnectionRouter_NULL;
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254 ConnectionRouter oldRouter = getConnectionRouter();
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255 if (oldRouter !is cr) {
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256 connectionRouter.remove(this);
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257 if (auto n = cast(RoutingNotifier)connectionRouter )
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258 n.realRouter = cr;
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259 else
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260 connectionRouter = cr;
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261 firePropertyChange(Connection.PROPERTY_CONNECTION_ROUTER, cast(Object)oldRouter, cast(Object)cr);
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262 revalidate();
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263 }
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264 }
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265
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266 /**
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267 * Sets the routing constraint for this connection.
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268 * @param cons the constraint
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269 */
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270 public void setRoutingConstraint(Object cons) {
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271 if (connectionRouter !is null)
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272 connectionRouter.setConstraint(this, cons);
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273 revalidate();
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274 }
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275
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276 /**
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277 * Sets the anchor to be used at the start of this polyline connection.
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278 * @param anchor the new source anchor
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279 */
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280 public void setSourceAnchor(ConnectionAnchor anchor) {
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281 if (anchor is startAnchor)
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282 return;
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283 unhookSourceAnchor();
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284 //No longer needed, revalidate does this.
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285 //getConnectionRouter().invalidate(this);
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286 startAnchor = anchor;
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287 if (getParent() !is null)
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288 hookSourceAnchor();
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289 revalidate();
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290 }
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291
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292 /**
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293 * Sets the decoration to be used at the start of the {@link Connection}.
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294 * @param dec the new source decoration
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295 * @since 2.0
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296 */
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297 public void setSourceDecoration(RotatableDecoration dec) {
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298 if (startArrow is dec)
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299 return;
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300 if (startArrow !is null)
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301 remove(startArrow);
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302 startArrow = dec;
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303 if (startArrow !is null)
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304 add(startArrow, new ArrowLocator(this, ConnectionLocator.SOURCE));
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305 }
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306
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307 /**
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308 * Sets the anchor to be used at the end of the polyline connection. Removes this listener
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309 * from the old anchor and adds it to the new anchor.
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310 * @param anchor the new target anchor
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311 */
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312 public void setTargetAnchor(ConnectionAnchor anchor) {
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313 if (anchor is endAnchor)
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314 return;
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315 unhookTargetAnchor();
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316 //No longer needed, revalidate does this.
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317 //getConnectionRouter().invalidate(this);
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318 endAnchor = anchor;
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319 if (getParent() !is null)
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320 hookTargetAnchor();
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321 revalidate();
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322 }
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323
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324 /**
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325 * Sets the decoration to be used at the end of the {@link Connection}.
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326 * @param dec the new target decoration
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327 */
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328 public void setTargetDecoration(RotatableDecoration dec) {
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329 if (endArrow is dec)
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330 return;
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331 if (endArrow !is null)
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332 remove(endArrow);
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333 endArrow = dec;
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334 if (endArrow !is null)
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335 add(endArrow, new ArrowLocator(this, ConnectionLocator.TARGET));
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336 }
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337
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338 private void unhookSourceAnchor() {
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339 if (getSourceAnchor() !is null)
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340 getSourceAnchor().removeAnchorListener(this);
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341 }
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342
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343 private void unhookTargetAnchor() {
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344 if (getTargetAnchor() !is null)
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345 getTargetAnchor().removeAnchorListener(this);
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346 }
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347
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348 final class RoutingNotifier : ConnectionRouter {
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349
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350 ConnectionRouter realRouter;
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351 List listeners;
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352
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353 this(ConnectionRouter router, RoutingListener listener) {
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354 listeners = new ArrayList(1);
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355 realRouter = router;
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356 listeners.add(cast(Object)listener);
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357 }
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358
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359 public Object getConstraint(Connection connection) {
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360 return realRouter.getConstraint(connection);
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361 }
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362
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363 public void invalidate(Connection connection) {
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364 for (int i = 0; i < listeners.size(); i++)
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365 (cast(RoutingListener)listeners.get(i)).invalidate(connection);
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366
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367 realRouter.invalidate(connection);
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368 }
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369
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370 public void route(Connection connection) {
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371 bool consumed = false;
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372 for (int i = 0; i < listeners.size(); i++)
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373 consumed |= (cast(RoutingListener)listeners.get(i)).route(connection);
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374
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375 if (!consumed)
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376 realRouter.route(connection);
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377
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378 for (int i = 0; i < listeners.size(); i++)
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379 (cast(RoutingListener)listeners.get(i)).postRoute(connection);
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380 }
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381
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382 public void remove(Connection connection) {
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383 for (int i = 0; i < listeners.size(); i++)
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384 (cast(RoutingListener)listeners.get(i)).remove(connection);
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385 realRouter.remove(connection);
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386 }
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387
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388 public void setConstraint(Connection connection, Object constraint) {
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389 for (int i = 0; i < listeners.size(); i++)
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390 (cast(RoutingListener)listeners.get(i)).setConstraint(connection, constraint);
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391 realRouter.setConstraint(connection, constraint);
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392 }
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393
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394 }
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395
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396 }