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1 /*******************************************************************************
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2 * Copyright (c) 2004-2006 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 * Sebastian Davids - bug 69254
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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.ComboViewer;
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16
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17 import dwtx.jface.viewers.AbstractListViewer;
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18
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19 import dwt.DWT;
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20 import dwt.custom.CCombo;
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21 import dwt.widgets.Combo;
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22 import dwt.widgets.Composite;
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23 import dwt.widgets.Control;
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24 import dwtx.core.runtime.Assert;
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25
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26 import dwt.dwthelper.utils;
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27
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28 /**
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29 * A concrete viewer based either on an DWT <code>Combo</code> control or <code>CCombo</code>
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30 * control. This class is intended as an alternative to the JFace <code>ListViewer</code>, which displays
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31 * its content in a combo box rather than a list. Wherever possible, this class attempts to behave
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32 * like ListViewer. <p>
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33 *
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34 * This class is designed to be instantiated with a pre-existing DWT combo control
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35 * and configured with a domain-specific content provider, label provider, element
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36 * filter (optional), and element sorter (optional).
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37 * </p>
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38 *
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39 * @see dwtx.jface.viewers.ListViewer
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40 * @since 3.0
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41 */
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42 public final class ComboViewer : AbstractListViewer {
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43
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44 /**
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45 * This viewer's list control if this viewer is instantiated with a combo control; otherwise
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46 * <code>null</code>.
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47 *
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48 * @see #ComboViewer(Combo)
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49 */
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50 private Combo combo;
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51
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52 /**
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53 * This viewer's list control if this viewer is instantiated with a CCombo control; otherwise
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54 * <code>null</code>.
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55 *
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56 * @see #ComboViewer(CCombo)
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57 * @since 3.3
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58 */
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59 private CCombo ccombo;
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60
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61 /**
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62 * Creates a combo viewer on a newly-created combo control under the given parent.
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63 * The viewer has no input, no content provider, a default label provider,
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64 * no sorter, and no filters.
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65 *
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66 * @param parent the parent control
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67 */
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68 public this(Composite parent) {
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69 this(parent, DWT.READ_ONLY | DWT.BORDER);
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70 }
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71
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72 /**
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73 * Creates a combo viewer on a newly-created combo control under the given parent.
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74 * The combo control is created using the given DWT style bits.
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75 * The viewer has no input, no content provider, a default label provider,
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76 * no sorter, and no filters.
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77 *
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78 * @param parent the parent control
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79 * @param style the DWT style bits
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80 */
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81 public this(Composite parent, int style) {
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82 this(new Combo(parent, style));
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83 }
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84
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85 /**
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86 * Creates a combo viewer on the given combo control.
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87 * The viewer has no input, no content provider, a default label provider,
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88 * no sorter, and no filters.
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89 *
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90 * @param list the combo control
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91 */
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92 public this(Combo list) {
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93 this.combo = list;
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94 hookControl(list);
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95 }
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96
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97 /**
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98 * Creates a combo viewer on the given CCombo control.
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99 * The viewer has no input, no content provider, a default label provider,
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100 * no sorter, and no filters.
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101 *
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102 * @param list the CCombo control
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103 * @since 3.3
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104 */
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105 public this(CCombo list) {
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106 this.ccombo = list;
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107 hookControl(list);
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108 }
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109
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110 protected void listAdd(String string, int index) {
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111 if (combo is null) {
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112 ccombo.add(string, index);
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113 } else {
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114 combo.add(string, index);
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115 }
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116 }
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117
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118 protected void listSetItem(int index, String string) {
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119 if (combo is null) {
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120 ccombo.setItem(index, string);
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121 } else {
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122 combo.setItem(index, string);
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123 }
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124 }
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125
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126 protected int[] listGetSelectionIndices() {
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127 if (combo is null) {
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128 return [ ccombo.getSelectionIndex() ];
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129 } else {
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130 return [ combo.getSelectionIndex() ];
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131 }
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132 }
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133
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134 protected int listGetItemCount() {
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135 if (combo is null) {
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136 return ccombo.getItemCount();
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137 } else {
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138 return combo.getItemCount();
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139 }
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140 }
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141
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142 protected void listSetItems(String[] labels) {
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143 if (combo is null) {
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144 ccombo.setItems(labels);
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145 } else {
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146 combo.setItems(labels);
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147 }
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148 }
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149
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150 protected void listRemoveAll() {
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151 if (combo is null) {
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152 ccombo.removeAll();
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153 } else {
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154 combo.removeAll();
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155 }
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156 }
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157
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158 protected void listRemove(int index) {
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159 if (combo is null) {
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160 ccombo.remove(index);
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161 } else {
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162 combo.remove(index);
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163 }
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164 }
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165
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166 /* (non-Javadoc)
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167 * Method declared on Viewer.
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168 */
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169 public Control getControl() {
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170 if (combo is null) {
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171 return ccombo;
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172 } else {
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173 return combo;
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174 }
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175 }
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176
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177 /**
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178 * Returns this list viewer's list control. If the viewer was not created on
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179 * a CCombo control, some kind of unchecked exception is thrown.
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180 *
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181 * @return the list control
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182 * @since 3.3
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183 */
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184 public CCombo getCCombo() {
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185 Assert.isNotNull(ccombo);
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186 return ccombo;
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187 }
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188
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189 /**
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190 * Returns this list viewer's list control. If the viewer was not created on
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191 * a Combo control, some kind of unchecked exception is thrown.
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192 *
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193 * @return the list control
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194 */
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195 public Combo getCombo() {
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196 Assert.isNotNull(combo);
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197 return combo;
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198 }
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199
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200 /*
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201 * Do nothing -- combos only display the selected element, so there is no way
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202 * we can ensure that the given element is visible without changing the selection.
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203 * Method defined on StructuredViewer.
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204 */
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205 public void reveal(Object element) {
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206 }
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207
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208 /* (non-Javadoc)
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209 * @see dwtx.jface.viewers.AbstractListViewer#listSetSelection(int[])
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210 */
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211 protected void listSetSelection(int[] ixs) {
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212 if (combo is null) {
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213 for (int idx = 0; idx < ixs.length; idx++) {
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214 ccombo.select(ixs[idx]);
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215 }
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216 } else {
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217 for (int idx = 0; idx < ixs.length; idx++) {
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218 combo.select(ixs[idx]);
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219 }
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220 }
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221 }
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222
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223 /* (non-Javadoc)
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224 * @see dwtx.jface.viewers.AbstractListViewer#listDeselectAll()
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225 */
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226 protected void listDeselectAll() {
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227 if (combo is null) {
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228 ccombo.deselectAll();
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229 ccombo.clearSelection();
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230 } else {
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231 combo.deselectAll();
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232 combo.clearSelection();
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233 }
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234 }
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235
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236 /* (non-Javadoc)
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237 * @see dwtx.jface.viewers.AbstractListViewer#listShowSelection()
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238 */
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239 protected void listShowSelection() {
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240 }
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241 }
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