Mercurial > projects > dwt-mac
annotate dwt/custom/TableEditor.d @ 41:6337764516f1
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author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 07 Oct 2008 16:29:55 +0200 |
parents | e831403a80a9 |
children | 07399639c0c8 |
rev | line source |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2008 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 dwt.custom.TableEditor; |
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14 |
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15 import dwt.dwthelper.utils; |
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16 |
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17 |
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18 |
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19 import dwt.DWT; |
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20 import dwt.events.ControlEvent; |
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21 import dwt.events.ControlListener; |
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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.Display; |
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25 import dwt.widgets.Table; |
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26 import dwt.widgets.TableColumn; |
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27 import dwt.widgets.TableItem; |
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28 import dwt.custom.ControlEditor; |
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29 import dwt.dwthelper.Runnable; |
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30 |
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31 /** |
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32 * |
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33 * A TableEditor is a manager for a Control that appears above a cell in a Table and tracks with the |
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34 * moving and resizing of that cell. It can be used to display a text widget above a cell |
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35 * in a Table so that the user can edit the contents of that cell. It can also be used to display |
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36 * a button that can launch a dialog for modifying the contents of the associated cell. |
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37 * |
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38 * <p> Here is an example of using a TableEditor: |
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39 * <code><pre> |
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40 * final Table table = new Table(shell, DWT.FULL_SELECTION | DWT.HIDE_SELECTION); |
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41 * TableColumn column1 = new TableColumn(table, DWT.NONE); |
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42 * TableColumn column2 = new TableColumn(table, DWT.NONE); |
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43 * for (int i = 0; i < 10; i++) { |
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44 * TableItem item = new TableItem(table, DWT.NONE); |
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45 * item.setText(new String[] {"item " + i, "edit this value"}); |
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46 * } |
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47 * column1.pack(); |
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48 * column2.pack(); |
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49 * |
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50 * final TableEditor editor = new TableEditor(table); |
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51 * //The editor must have the same size as the cell and must |
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52 * //not be any smaller than 50 pixels. |
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53 * editor.horizontalAlignment = DWT.LEFT; |
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54 * editor.grabHorizontal = true; |
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55 * editor.minimumWidth = 50; |
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56 * // editing the second column |
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57 * final int EDITABLECOLUMN = 1; |
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58 * |
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59 * table.addSelectionListener(new SelectionAdapter() { |
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60 * public void widgetSelected(SelectionEvent e) { |
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61 * // Clean up any previous editor control |
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62 * Control oldEditor = editor.getEditor(); |
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63 * if (oldEditor !is null) oldEditor.dispose(); |
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64 * |
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65 * // Identify the selected row |
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66 * TableItem item = (TableItem)e.item; |
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67 * if (item is null) return; |
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68 * |
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69 * // The control that will be the editor must be a child of the Table |
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70 * Text newEditor = new Text(table, DWT.NONE); |
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71 * newEditor.setText(item.getText(EDITABLECOLUMN)); |
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72 * newEditor.addModifyListener(new ModifyListener() { |
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73 * public void modifyText(ModifyEvent e) { |
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74 * Text text = (Text)editor.getEditor(); |
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75 * editor.getItem().setText(EDITABLECOLUMN, text.getText()); |
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76 * } |
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77 * }); |
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78 * newEditor.selectAll(); |
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79 * newEditor.setFocus(); |
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80 * editor.setEditor(newEditor, item, EDITABLECOLUMN); |
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81 * } |
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82 * }); |
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83 * </pre></code> |
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84 * |
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85 * @see <a href="http://www.eclipse.org/swt/snippets/#tableeditor">TableEditor snippets</a> |
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86 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
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87 */ |
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88 public class TableEditor : ControlEditor { |
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89 Table table; |
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90 TableItem item; |
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91 int column = -1; |
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92 ControlListener columnListener; |
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93 Runnable timer; |
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94 static final int TIMEOUT = 1500; |
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95 /** |
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96 * Creates a TableEditor for the specified Table. |
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97 * |
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98 * @param table the Table Control above which this editor will be displayed |
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99 * |
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100 */ |
5 | 101 public this (Table table) { |
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102 super(table); |
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103 this.table = table; |
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104 |
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105 columnListener = new class() ControlListener { |
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106 public void controlMoved(ControlEvent e){ |
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107 layout (); |
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108 } |
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109 public void controlResized(ControlEvent e){ |
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110 layout (); |
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111 } |
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112 }; |
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113 timer = new class() Runnable { |
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114 public void run() { |
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115 layout (); |
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116 } |
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117 }; |
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118 |
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119 // To be consistent with older versions of DWT, grabVertical defaults to true |
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120 grabVertical = true; |
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121 } |
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122 override Rectangle computeBounds () { |
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123 if (item is null || column is -1 || item.isDisposed()) return new Rectangle(0, 0, 0, 0); |
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124 Rectangle cell = item.getBounds(column); |
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125 Rectangle rect = item.getImageBounds(column); |
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126 cell.x = rect.x + rect.width; |
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127 cell.width -= rect.width; |
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128 Rectangle area = table.getClientArea(); |
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129 if (cell.x < area.x + area.width) { |
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130 if (cell.x + cell.width > area.x + area.width) { |
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131 cell.width = area.x + area.width - cell.x; |
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132 } |
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133 } |
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134 Rectangle editorRect = new Rectangle(cell.x, cell.y, minimumWidth, minimumHeight); |
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135 |
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136 if (grabHorizontal) { |
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137 editorRect.width = Math.max(cell.width, minimumWidth); |
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138 } |
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139 |
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140 if (grabVertical) { |
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141 editorRect.height = Math.max(cell.height, minimumHeight); |
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142 } |
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143 |
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144 if (horizontalAlignment is DWT.RIGHT) { |
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145 editorRect.x += cell.width - editorRect.width; |
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146 } else if (horizontalAlignment is DWT.LEFT) { |
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147 // do nothing - cell.x is the right answer |
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148 } else { // default is CENTER |
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149 editorRect.x += (cell.width - editorRect.width)/2; |
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150 } |
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151 |
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152 if (verticalAlignment is DWT.BOTTOM) { |
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153 editorRect.y += cell.height - editorRect.height; |
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154 } else if (verticalAlignment is DWT.TOP) { |
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155 // do nothing - cell.y is the right answer |
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156 } else { // default is CENTER |
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157 editorRect.y += (cell.height - editorRect.height)/2; |
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158 } |
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159 return editorRect; |
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160 } |
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161 /** |
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162 * Removes all associations between the TableEditor and the cell in the table. The |
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163 * Table and the editor Control are <b>not</b> disposed. |
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164 */ |
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165 public override void dispose () { |
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166 if (table !is null && !table.isDisposed()) { |
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167 if (this.column > -1 && this.column < table.getColumnCount()){ |
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168 TableColumn tableColumn = table.getColumn(this.column); |
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169 tableColumn.removeControlListener(columnListener); |
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170 } |
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171 } |
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172 columnListener = null; |
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173 table = null; |
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174 item = null; |
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175 column = -1; |
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176 timer = null; |
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177 super.dispose(); |
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178 } |
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179 /** |
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180 * Returns the zero based index of the column of the cell being tracked by this editor. |
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181 * |
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182 * @return the zero based index of the column of the cell being tracked by this editor |
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183 */ |
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184 public int getColumn () { |
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185 return column; |
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186 } |
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187 /** |
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188 * Returns the TableItem for the row of the cell being tracked by this editor. |
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189 * |
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190 * @return the TableItem for the row of the cell being tracked by this editor |
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191 */ |
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192 public TableItem getItem () { |
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193 return item; |
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194 } |
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195 void resize () { |
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196 layout(); |
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197 /* |
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198 * On some platforms, the table scrolls when an item that |
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199 * is partially visible at the bottom of the table is |
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200 * selected. Ensure that the correct row is edited by |
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201 * laying out one more time in a timerExec(). |
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202 */ |
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203 if (table !is null) { |
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204 Display display = table.getDisplay(); |
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205 display.timerExec(-1, timer); |
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206 display.timerExec(TIMEOUT, timer); |
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207 } |
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208 } |
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209 /** |
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210 * Sets the zero based index of the column of the cell being tracked by this editor. |
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211 * |
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212 * @param column the zero based index of the column of the cell being tracked by this editor |
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213 */ |
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214 public void setColumn(int column) { |
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215 int columnCount = table.getColumnCount(); |
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216 // Separately handle the case where the table has no TableColumns. |
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217 // In this situation, there is a single default column. |
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218 if (columnCount is 0) { |
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219 this.column = (column is 0) ? 0 : -1; |
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220 resize(); |
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221 return; |
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222 } |
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223 if (this.column > -1 && this.column < columnCount){ |
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224 TableColumn tableColumn = table.getColumn(this.column); |
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225 tableColumn.removeControlListener(columnListener); |
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226 this.column = -1; |
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227 } |
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228 |
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229 if (column < 0 || column >= table.getColumnCount()) return; |
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230 |
0
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231 this.column = column; |
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232 TableColumn tableColumn = table.getColumn(this.column); |
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233 tableColumn.addControlListener(columnListener); |
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234 resize(); |
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235 } |
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236 /** |
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237 * Specifies the <code>TableItem</code> that is to be edited. |
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238 * |
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239 * @param item the item to be edited |
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240 */ |
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241 public void setItem (TableItem item) { |
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242 this.item = item; |
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243 resize(); |
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244 } |
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245 public override void setEditor (Control editor) { |
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246 super.setEditor(editor); |
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247 resize(); |
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248 } |
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249 /** |
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250 * Specify the Control that is to be displayed and the cell in the table that it is to be positioned above. |
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251 * |
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252 * <p>Note: The Control provided as the editor <b>must</b> be created with its parent being the Table control |
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253 * specified in the TableEditor constructor. |
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254 * |
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255 * @param editor the Control that is displayed above the cell being edited |
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256 * @param item the TableItem for the row of the cell being tracked by this editor |
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257 * @param column the zero based index of the column of the cell being tracked by this editor |
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258 */ |
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259 public void setEditor (Control editor, TableItem item, int column) { |
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260 setItem(item); |
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261 setColumn(column); |
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262 setEditor(editor); |
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263 } |
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264 public override void layout () { |
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265 if (table is null || table.isDisposed()) return; |
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266 if (item is null || item.isDisposed()) return; |
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267 int columnCount = table.getColumnCount(); |
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268 if (columnCount is 0 && column !is 0) return; |
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269 if (columnCount > 0 && (column < 0 || column >= columnCount)) return; |
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270 super.layout(); |
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271 } |
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272 } |