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1 /*******************************************************************************
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2 * Copyright (c) 2006, 2007 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 * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
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11 * - Fix for bug 174355, 171126
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12 * Port to the D programming language:
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13 * Frank Benoit <benoit@tionex.de>
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14 *******************************************************************************/
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15
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16 module dwtx.jface.viewers.TreeViewerRow;
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17
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18 import dwtx.jface.viewers.ViewerRow;
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19 import dwtx.jface.viewers.TreePath;
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20
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21 import tango.util.collection.LinkSeq;
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22
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23 import dwt.graphics.Color;
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24 import dwt.graphics.Font;
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25 import dwt.graphics.Image;
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26 import dwt.graphics.Rectangle;
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27 import dwt.widgets.Control;
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28 import dwt.widgets.Tree;
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29 import dwt.widgets.TreeItem;
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30 import dwt.widgets.Widget;
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31 import dwtx.core.runtime.Assert;
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32
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33 import dwt.dwthelper.utils;
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34
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35 /**
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36 * TreeViewerRow is the Tree implementation of ViewerRow.
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37 * @since 3.3
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38 *
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39 */
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40 public class TreeViewerRow : ViewerRow {
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41 private TreeItem item;
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42
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43 /**
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44 * Create a new instance of the receiver.
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45 * @param item
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46 */
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47 this(TreeItem item) {
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48 this.item = item;
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49 }
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50
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51 /* (non-Javadoc)
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52 * @see dwtx.jface.viewers.ViewerRow#getBounds(int)
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53 */
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54 public Rectangle getBounds(int columnIndex) {
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55 return item.getBounds(columnIndex);
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56 }
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57
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58 /* (non-Javadoc)
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59 * @see dwtx.jface.viewers.ViewerRow#getBounds()
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60 */
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61 public Rectangle getBounds() {
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62 return item.getBounds();
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63 }
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64
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65 /* (non-Javadoc)
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66 * @see dwtx.jface.viewers.ViewerRow#getColumnCount()
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67 */
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68 public int getColumnCount() {
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69 return item.getParent().getColumnCount();
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70 }
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71
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72 /* (non-Javadoc)
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73 * @see dwtx.jface.viewers.ViewerRow#getItem()
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74 */
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75 public Widget getItem() {
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76 return item;
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77 }
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78
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79 /* (non-Javadoc)
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80 * @see dwtx.jface.viewers.ViewerRow#getBackground(int)
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81 */
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82 public Color getBackground(int columnIndex) {
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83 return item.getBackground(columnIndex);
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84 }
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85
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86 /* (non-Javadoc)
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87 * @see dwtx.jface.viewers.ViewerRow#getFont(int)
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88 */
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89 public Font getFont(int columnIndex) {
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90 return item.getFont(columnIndex);
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91 }
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92
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93 /* (non-Javadoc)
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94 * @see dwtx.jface.viewers.ViewerRow#getForeground(int)
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95 */
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96 public Color getForeground(int columnIndex) {
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97 return item.getForeground(columnIndex);
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98 }
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99
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100 /* (non-Javadoc)
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101 * @see dwtx.jface.viewers.ViewerRow#getImage(int)
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102 */
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103 public Image getImage(int columnIndex) {
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104 return item.getImage(columnIndex);
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105 }
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106
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107 /* (non-Javadoc)
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108 * @see dwtx.jface.viewers.ViewerRow#getText(int)
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109 */
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110 public String getText(int columnIndex) {
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111 return item.getText(columnIndex);
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112 }
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113
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114 /* (non-Javadoc)
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115 * @see dwtx.jface.viewers.ViewerRow#setBackground(int, dwt.graphics.Color)
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116 */
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117 public void setBackground(int columnIndex, Color color) {
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118 item.setBackground(columnIndex, color);
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119 }
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120
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121 /* (non-Javadoc)
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122 * @see dwtx.jface.viewers.ViewerRow#setFont(int, dwt.graphics.Font)
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123 */
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124 public void setFont(int columnIndex, Font font) {
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125 item.setFont(columnIndex, font);
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126 }
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127
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128 /* (non-Javadoc)
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129 * @see dwtx.jface.viewers.ViewerRow#setForeground(int, dwt.graphics.Color)
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130 */
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131 public void setForeground(int columnIndex, Color color) {
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132 item.setForeground(columnIndex, color);
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133 }
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134
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135 /* (non-Javadoc)
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136 * @see dwtx.jface.viewers.ViewerRow#setImage(int, dwt.graphics.Image)
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137 */
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138 public void setImage(int columnIndex, Image image) {
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139 Image oldImage = item.getImage(columnIndex);
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140 if (image !is oldImage) {
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141 item.setImage(columnIndex, image);
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142 }
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143 }
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144
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145 /* (non-Javadoc)
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146 * @see dwtx.jface.viewers.ViewerRow#setText(int, java.lang.String)
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147 */
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148 public void setText(int columnIndex, String text) {
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149 item.setText(columnIndex, text is null ? "" : text); //$NON-NLS-1$
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150 }
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151
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152 /* (non-Javadoc)
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153 * @see dwtx.jface.viewers.ViewerRow#getControl()
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154 */
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155 public Control getControl() {
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156 return item.getParent();
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157 }
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158
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159
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160 public ViewerRow getNeighbor(int direction, bool sameLevel) {
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161 if( direction is ViewerRow.ABOVE ) {
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162 return getRowAbove(sameLevel);
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163 } else if( direction is ViewerRow.BELOW ) {
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164 return getRowBelow(sameLevel);
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165 } else {
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166 throw new IllegalArgumentException("Illegal value of direction argument."); //$NON-NLS-1$
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167 }
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168 }
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169
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170 private ViewerRow getRowBelow(bool sameLevel) {
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171 Tree tree = item.getParent();
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172
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173 // This means we have top-level item
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174 if( item.getParentItem() is null ) {
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175 if( sameLevel || ! item.getExpanded() ) {
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176 int index = tree.indexOf(item) + 1;
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177
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178 if( index < tree.getItemCount() ) {
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179 return new TreeViewerRow(tree.getItem(index));
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180 }
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181 } else if( item.getExpanded() && item.getItemCount() > 0 ) {
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182 return new TreeViewerRow(item.getItem(0));
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183 }
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184 } else {
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185 if( sameLevel || ! item.getExpanded() ) {
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186 TreeItem parentItem = item.getParentItem();
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187
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188 int nextIndex = parentItem.indexOf(item) + 1;
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189 int totalIndex = parentItem.getItemCount();
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190
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191 TreeItem itemAfter;
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192
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193 // This would mean that it was the last item
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194 if( nextIndex is totalIndex ) {
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195 itemAfter = findNextItem( parentItem );
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196 } else {
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197 itemAfter = parentItem.getItem(nextIndex);
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198 }
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199
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200 if( itemAfter !is null ) {
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201 return new TreeViewerRow(itemAfter);
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202 }
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203
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204 } else if( item.getExpanded() && item.getItemCount() > 0 ) {
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205 return new TreeViewerRow(item.getItem(0));
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206 }
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207 }
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208
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209 return null;
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210 }
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211
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212 private ViewerRow getRowAbove(bool sameLevel) {
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213 Tree tree = item.getParent();
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214
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215 // This means we have top-level item
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216 if( item.getParentItem() is null ) {
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217 int index = tree.indexOf(item) - 1;
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218 TreeItem nextTopItem = null;
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219
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220 if( index >= 0 ) {
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221 nextTopItem = tree.getItem(index);
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222 }
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223
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224 if( nextTopItem !is null ) {
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225 if( sameLevel ) {
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226 return new TreeViewerRow(nextTopItem);
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227 }
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228
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229 return new TreeViewerRow(findLastVisibleItem(nextTopItem));
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230 }
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231 } else {
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232 TreeItem parentItem = item.getParentItem();
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233 int previousIndex = parentItem.indexOf(item) - 1;
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234
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235 TreeItem itemBefore;
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236 if( previousIndex >= 0 ) {
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237 if( sameLevel ) {
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238 itemBefore = parentItem.getItem(previousIndex);
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239 } else {
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240 itemBefore = findLastVisibleItem(parentItem.getItem(previousIndex));
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241 }
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242 } else {
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243 itemBefore = parentItem;
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244 }
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245
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246 if( itemBefore !is null ) {
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247 return new TreeViewerRow(itemBefore);
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248 }
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249 }
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250
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251 return null;
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252 }
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253
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254 private TreeItem findLastVisibleItem(TreeItem parentItem) {
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255 TreeItem rv = parentItem;
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256
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257 while( rv.getExpanded() && rv.getItemCount() > 0 ) {
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258 rv = rv.getItem(rv.getItemCount()-1);
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259 }
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260
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261 return rv;
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262 }
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263
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264 private TreeItem findNextItem(TreeItem item) {
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265 TreeItem rv = null;
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266 Tree tree = item.getParent();
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267 TreeItem parentItem = item.getParentItem();
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268
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269 int nextIndex;
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270 int totalItems;
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271
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272 if( parentItem is null ) {
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273 nextIndex = tree.indexOf(item) + 1;
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274 totalItems = tree.getItemCount();
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275 } else {
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276 nextIndex = parentItem.indexOf(item) + 1;
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277 totalItems = parentItem.getItemCount();
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278 }
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279
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280 // This is once more the last item in the tree
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281 // Search on
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282 if( nextIndex is totalItems ) {
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283 if( item.getParentItem() !is null ) {
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284 rv = findNextItem(item.getParentItem());
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285 }
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286 } else {
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287 if( parentItem is null ) {
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288 rv = tree.getItem(nextIndex);
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289 } else {
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290 rv = parentItem.getItem(nextIndex);
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291 }
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292 }
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293
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294 return rv;
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295 }
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296
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297 public TreePath getTreePath() {
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298 TreeItem tItem = item;
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299 auto segments = new LinkSeq!(Object);
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300 while (tItem !is null) {
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301 Object segment = tItem.getData();
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302 Assert.isNotNull(segment);
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303 segments.prepend(segment);
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304 tItem = tItem.getParentItem();
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305 }
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306
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307 return new TreePath(segments.toArray());
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308 }
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309
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310 void setItem(TreeItem item) {
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311 this.item = item;
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312 }
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313
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314 public Object clone() {
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315 return new TreeViewerRow(item);
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316 }
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317
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318 public Object getElement() {
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319 return item.getData();
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320 }
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321 }
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