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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 Shindl <tom.schindl@bestsolution.at> - initial API and implementation
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11 * Port to the D programming language:
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12 * Frank Benoit <benoit@tionex.de>
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13 *******************************************************************************/
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14
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15 module dwtx.jface.viewers.ViewerCell;
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16
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17 import dwtx.jface.viewers.ViewerRow;
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18
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19 import dwt.graphics.Color;
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20 import dwt.graphics.Font;
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21 import dwt.graphics.Image;
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22 import dwt.graphics.Rectangle;
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23 import dwt.widgets.Control;
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24 import dwt.widgets.Item;
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25 import dwt.widgets.Widget;
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26
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27 import dwt.dwthelper.utils;
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28
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29 /**
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30 * The ViewerCell is the JFace representation of a cell entry in a ViewerRow.
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31 *
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32 * @since 3.3
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33 *
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34 */
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35 public class ViewerCell {
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36 private int columnIndex;
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37
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38 private ViewerRow row;
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39
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40 private Object element;
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41
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42 /**
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43 * Constant denoting the cell above current one (value is 1).
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44 */
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45 public static int ABOVE = 1;
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46
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47 /**
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48 * Constant denoting the cell below current one (value is 2).
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49 */
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50 public static int BELOW = 1 << 1;
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51
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52 /**
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53 * Constant denoting the cell to the left of the current one (value is 4).
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54 */
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55 public static int LEFT = 1 << 2;
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56
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57 /**
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58 * Constant denoting the cell to the right of the current one (value is 8).
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59 */
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60 public static int RIGHT = 1 << 3;
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61
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62 /**
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63 * Create a new instance of the receiver on the row.
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64 *
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65 * @param row
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66 * @param columnIndex
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67 */
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68 this(ViewerRow row, int columnIndex, Object element) {
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69 this.row = row;
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70 this.columnIndex = columnIndex;
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71 this.element = element;
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72 }
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73
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74 /**
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75 * Get the index of the cell.
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76 *
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77 * @return the index
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78 */
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79 public int getColumnIndex() {
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80 return columnIndex;
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81 }
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82
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83 /**
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84 * Get the bounds of the cell.
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85 *
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86 * @return {@link Rectangle}
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87 */
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88 public Rectangle getBounds() {
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89 return row.getBounds(columnIndex);
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90 }
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91
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92 /**
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93 * Get the element this row represents.
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94 *
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95 * @return {@link Object}
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96 */
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97 public Object getElement() {
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98 if (element !is null) {
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99 return element;
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100 }
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101 return row.getElement();
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102 }
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103
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104 /**
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105 * Return the text for the cell.
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106 *
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107 * @return {@link String}
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108 */
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109 public String getText() {
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110 return row.getText(columnIndex);
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111 }
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112
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113 /**
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114 * Return the Image for the cell.
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115 *
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116 * @return {@link Image} or <code>null</code>
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117 */
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118 public Image getImage() {
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119 return row.getImage(columnIndex);
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120 }
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121
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122 /**
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123 * Set the background color of the cell.
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124 *
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125 * @param background
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126 */
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127 public void setBackground(Color background) {
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128 row.setBackground(columnIndex, background);
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129
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130 }
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131
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132 /**
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133 * Set the foreground color of the cell.
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134 *
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135 * @param foreground
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136 */
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137 public void setForeground(Color foreground) {
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138 row.setForeground(columnIndex, foreground);
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139
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140 }
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141
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142 /**
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143 * Set the font of the cell.
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144 *
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145 * @param font
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146 */
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147 public void setFont(Font font) {
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148 row.setFont(columnIndex, font);
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149
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150 }
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151
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152 /**
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153 * Set the text for the cell.
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154 *
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155 * @param text
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156 */
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157 public void setText(String text) {
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158 row.setText(columnIndex, text);
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159
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160 }
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161
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162 /**
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163 * Set the Image for the cell.
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164 *
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165 * @param image
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166 */
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167 public void setImage(Image image) {
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168 row.setImage(columnIndex, image);
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169
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170 }
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171
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172 /**
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173 * Set the columnIndex.
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174 *
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175 * @param column
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176 */
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177 void setColumn(int column) {
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178 columnIndex = column;
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179
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180 }
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181
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182 /**
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183 * Set the row to rowItem and the columnIndex to column.
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184 *
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185 * @param rowItem
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186 * @param column
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187 */
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188 void update(ViewerRow rowItem, int column, Object element) {
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189 row = rowItem;
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190 columnIndex = column;
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191 this.element = element;
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192 }
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193
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194 /**
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195 * Return the item for the receiver.
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196 *
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197 * @return {@link Item}
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198 */
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199 public Widget getItem() {
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200 return row.getItem();
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201 }
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202
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203 /**
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204 * Get the control for this cell.
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205 *
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206 * @return {@link Control}
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207 */
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208 public Control getControl() {
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209 return row.getControl();
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210 }
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211
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212 /**
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213 * Returns the specified neighbor of this cell, or <code>null</code> if no
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214 * neighbor exists in the given direction. Direction constants can be
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215 * combined by bitwise OR; for example, this method will return the cell to
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216 * the upper-left of the current cell by passing {@link #ABOVE} |
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217 * {@link #LEFT}. If <code>sameLevel</code> is <code>true</code>, only
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218 * cells in sibling rows (under the same parent) will be considered.
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219 *
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220 * @param directionMask
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221 * the direction mask used to identify the requested neighbor
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222 * cell
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223 * @param sameLevel
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224 * if <code>true</code>, only consider cells from sibling rows
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225 * @return the requested neighbor cell, or <code>null</code> if not found
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226 */
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227 public ViewerCell getNeighbor(int directionMask, bool sameLevel) {
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228 ViewerRow row;
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229 int columnIndex;
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230
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231 if ((directionMask & ABOVE) is ABOVE) {
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232 row = this.row.getNeighbor(ViewerRow.ABOVE, sameLevel);
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233 } else if ((directionMask & BELOW) is BELOW) {
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234 row = this.row.getNeighbor(ViewerRow.BELOW, sameLevel);
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235 } else {
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236 row = this.row;
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237 }
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238
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239 if (row !is null) {
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240 if ((directionMask & LEFT) is LEFT) {
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241 columnIndex = getColumnIndex() - 1;
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242 } else if ((directionMask & RIGHT) is RIGHT) {
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243 columnIndex = getColumnIndex() + 1;
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244 } else {
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245 columnIndex = getColumnIndex();
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246 }
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247
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248 if (columnIndex >= 0 && columnIndex < row.getColumnCount()) {
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249 return row.getCell(columnIndex);
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250 }
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251 }
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252
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253 return null;
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254 }
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255
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256 /**
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257 * @return the row
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258 */
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259 public ViewerRow getViewerRow() {
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260 return row;
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261 }
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262
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263 /* (non-Javadoc)
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264 * @see java.lang.Object#hashCode()
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265 */
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266 public override hash_t toHash() {
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267 const int prime = 31;
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268 int result = 1;
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269 result = prime * result + columnIndex;
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270 result = prime * result + ((row is null) ? 0 : row.toHash());
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271 return result;
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272 }
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273
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274 /* (non-Javadoc)
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275 * @see java.lang.Object#equals(java.lang.Object)
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276 */
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277 public override int opEquals(Object obj) {
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278 if (this is obj)
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279 return true;
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280 if (obj is null)
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281 return false;
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282 if (this.classinfo !is obj.classinfo )
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283 return false;
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284 ViewerCell other = cast(ViewerCell) obj;
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285 if (columnIndex !is other.columnIndex)
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286 return false;
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287 if (row is null) {
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288 if (other.row !is null)
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289 return false;
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290 } else if (!row.opEquals(other.row))
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291 return false;
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292 return true;
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293 }
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294 }
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