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annotate dwt/custom/PopupList.d @ 156:969e7de37c3d default tip

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Fixes to get dwt to work with dmd and ldc
author Jacob Carlborg <doob@me.com>
date Wed, 08 Jul 2009 21:56:44 +0200
parents 3d4579727e0e
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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.PopupList;
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15 import dwt.dwthelper.utils;
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18 import dwt.DWT;
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19 import dwt.DWTException;
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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.events.KeyEvent;
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23 import dwt.events.KeyListener;
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24 import dwt.events.MouseEvent;
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25 import dwt.events.MouseListener;
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26 import dwt.graphics.Font;
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27 import dwt.graphics.Point;
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28 import dwt.graphics.Rectangle;
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29 import dwt.widgets.Display;
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30 import dwt.widgets.Event;
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31 import dwt.widgets.List;
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32 import dwt.widgets.Listener;
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33 import dwt.widgets.Shell;
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34
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35 import tango.text.Util;
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36
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37 /**
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38 * A PopupList is a list of selectable items that appears in its own shell positioned above
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39 * its parent shell. It is used for selecting items when editing a Table cell (similar to the
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40 * list that appears when you open a Combo box).
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41 *
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42 * The list will be positioned so that it does not run off the screen and the largest number of items
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43 * are visible. It may appear above the current cursor location or below it depending how close you
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44 * are to the edge of the screen.
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45 *
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46 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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47 */
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48 public class PopupList {
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49 Shell shell;
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50 List list;
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51 int minimumWidth;
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52 /**
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53 * Creates a PopupList above the specified shell.
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54 *
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55 * @param parent a Shell control which will be the parent of the new instance (cannot be null)
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56 */
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57 public this(Shell parent) {
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58 this (parent, 0);
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59 }
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60 /**
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61 * Creates a PopupList above the specified shell.
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62 *
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63 * @param parent a widget which will be the parent of the new instance (cannot be null)
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64 * @param style the style of widget to construct
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65 *
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66 * @since 3.0
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67 */
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68 public this(Shell parent, int style) {
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69 shell = new Shell(parent, checkStyle(style));
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71 list = new List(shell, DWT.SINGLE | DWT.V_SCROLL);
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72
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73 // close dialog if user selects outside of the shell
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74 shell.addListener(DWT.Deactivate, new class() Listener {
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75 public void handleEvent(Event e){
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76 shell.setVisible (false);
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77 }
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78 });
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79
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80 // resize shell when list resizes
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81 shell.addControlListener(new class() ControlListener {
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82 public void controlMoved(ControlEvent e){}
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83 public void controlResized(ControlEvent e){
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84 Rectangle shellSize = shell.getClientArea();
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85 list.setSize(shellSize.width, shellSize.height);
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86 }
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87 });
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88
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89 // return list selection on Mouse Up or Carriage Return
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90 list.addMouseListener(new class() MouseListener {
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91 public void mouseDoubleClick(MouseEvent e){}
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92 public void mouseDown(MouseEvent e){}
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93 public void mouseUp(MouseEvent e){
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94 shell.setVisible (false);
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95 }
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96 });
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97 list.addKeyListener(new class() KeyListener {
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98 public void keyReleased(KeyEvent e){}
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99 public void keyPressed(KeyEvent e){
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100 if (e.character is '\r'){
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101 shell.setVisible (false);
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102 }
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103 }
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104 });
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105
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106 }
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107 private static int checkStyle (int style) {
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108 int mask = DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT;
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109 return style & mask;
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110 }
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111 /**
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112 * Gets the widget font.
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113 * <p>
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114 * @return the widget font
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115 *
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116 * @exception DWTException <ul>
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117 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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118 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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119 * </ul>
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120 */
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121 public Font getFont () {
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122 return list.getFont();
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123 }
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124 /**
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125 * Gets the items.
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126 * <p>
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127 * This operation will fail if the items cannot
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128 * be queried from the OS.
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129 *
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130 * @return the items in the widget
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131 *
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132 * @exception DWTException <ul>
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133 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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134 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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135 * </ul>
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136 */
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137 public String[] getItems () {
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138 return list.getItems();
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139 }
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140 /**
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141 * Gets the minimum width of the list.
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142 *
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143 * @return the minimum width of the list
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144 */
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145 public int getMinimumWidth () {
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146 return minimumWidth;
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147 }
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148 /**
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149 * Launches the Popup List, waits for an item to be selected and then closes the PopupList.
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150 *
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151 * @param rect the initial size and location of the PopupList; the dialog will be
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152 * positioned so that it does not run off the screen and the largest number of items are visible
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153 *
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154 * @return the text of the selected item or null if no item is selected
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155 */
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156 public String open (Rectangle rect) {
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157
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158 Point listSize = list.computeSize (rect.width, DWT.DEFAULT, false);
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159 Rectangle screenSize = shell.getDisplay().getBounds();
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160
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161 // Position the dialog so that it does not run off the screen and the largest number of items are visible
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162 int spaceBelow = screenSize.height - (rect.y + rect.height) - 30;
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163 int spaceAbove = rect.y - 30;
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164
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165 int y = 0;
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166 if (spaceAbove > spaceBelow && listSize.y > spaceBelow) {
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167 // place popup list above table cell
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168 if (listSize.y > spaceAbove){
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169 listSize.y = spaceAbove;
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170 } else {
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171 listSize.y += 2;
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172 }
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173 y = rect.y - listSize.y;
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174
0
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175 } else {
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176 // place popup list below table cell
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177 if (listSize.y > spaceBelow){
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178 listSize.y = spaceBelow;
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179 } else {
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180 listSize.y += 2;
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181 }
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182 y = rect.y + rect.height;
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183 }
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184
0
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185 // Make dialog as wide as the cell
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186 listSize.x = rect.width;
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187 // dialog width should not be less than minimumWidth
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188 if (listSize.x < minimumWidth)
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189 listSize.x = minimumWidth;
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190
0
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191 // Align right side of dialog with right side of cell
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192 int x = rect.x + rect.width - listSize.x;
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193
0
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194 shell.setBounds(x, y, listSize.x, listSize.y);
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195
0
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196 shell.open();
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197 list.setFocus();
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198
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199 Display display = shell.getDisplay();
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200 while (!shell.isDisposed () && shell.isVisible ()) {
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201 if (!display.readAndDispatch()) display.sleep();
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202 }
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203
0
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204 String result = null;
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205 if (!shell.isDisposed ()) {
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206 String [] strings = list.getSelection ();
0
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207 shell.dispose();
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208 if (strings.length !is 0) result = strings [0];
0
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209 }
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210 return result;
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211 }
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212 /**
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213 * Selects an item with text that starts with specified String.
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214 * <p>
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215 * If the item is not currently selected, it is selected.
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216 * If the item at an index is selected, it remains selected.
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217 * If the string is not matched, it is ignored.
0
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218 *
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219 * @param string the text of the item
0
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220 *
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221 * @exception DWTException <ul>
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222 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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223 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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224 * </ul>
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225 */
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226 public void select(String string) {
0
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227 String[] items = list.getItems();
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228
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229 // find the first entry in the list that starts with the
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230 // specified string
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231 if (string !is null){
0
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232 for (int i = 0; i < items.length; i++) {
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233 if ( tango.text.Util.locatePattern( items[i], string) is 0 ){
0
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234 int index = list.indexOf(items[i]);
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235 list.select(index);
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236 break;
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237 }
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238 }
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239 }
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240 }
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241 /**
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242 * Sets the widget font.
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243 * <p>
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244 * When new font is null, the font reverts
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245 * to the default system font for the widget.
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246 *
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247 * @param font the new font (or null)
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248 *
0
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249 * @exception DWTException <ul>
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250 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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251 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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252 * </ul>
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253 */
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254 public void setFont (Font font) {
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255 list.setFont(font);
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256 }
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257 /**
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258 * Sets all items.
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259 * <p>
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260 * The previous selection is cleared.
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261 * The previous items are deleted.
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262 * The new items are added.
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263 * The top index is set to 0.
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264 *
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265 * @param strings the array of items
0
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266 *
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267 * This operation will fail when an item is null
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268 * or could not be added in the OS.
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269 *
0
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270 * @exception IllegalArgumentException <ul>
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271 * <li>ERROR_INVALID_ARGUMENT - if an item in the items array is null</li>
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272 * </ul>
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273 * @exception DWTException <ul>
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274 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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275 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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276 * </ul>
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277 */
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278 public void setItems (String[] strings) {
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279 list.setItems(strings);
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280 }
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281 /**
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282 * Sets the minimum width of the list.
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283 *
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284 * @param width the minimum width of the list
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285 */
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286 public void setMinimumWidth (int width) {
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287 if (width < 0)
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288 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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289
0
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290 minimumWidth = width;
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291 }
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292 }