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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 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 dwtx.jface.internal.text.link.contentassist.PopupCloser2;
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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 import dwt.events.FocusEvent;
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19 import dwt.events.FocusListener;
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20 import dwt.events.SelectionEvent;
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21 import dwt.events.SelectionListener;
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22 import dwt.events.ShellAdapter;
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23 import dwt.events.ShellEvent;
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24 import dwt.widgets.Display;
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25 import dwt.widgets.ScrollBar;
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26 import dwt.widgets.Shell;
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27 import dwt.widgets.Table;
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28
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29
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30 /**
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31 * A generic closer class used to monitor various
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32 * interface events in order to determine whether
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33 * a content assistant should be terminated and all
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34 * associated windows be closed.
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35 */
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36 class PopupCloser2 : ShellAdapter , FocusListener, SelectionListener {
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37
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38 /** The content assistant to be monitored */
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39 private ContentAssistant2 fContentAssistant;
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40 /** The table of a selector popup opened by the content assistant */
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41 private Table fTable;
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42 /** The scrollbar of the table for the selector popup */
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43 private ScrollBar fScrollbar;
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44 /** Indicates whether the scrollbar thumb has been grabbed. */
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45 private bool fScrollbarClicked= false;
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46 /** The shell on which some listeners are registered. */
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47 private Shell fShell;
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48
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49
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50 /**
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51 * Installs this closer on the given table opened by the given content assistant.
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52 *
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53 * @param contentAssistant the content assistant
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54 * @param table the table to be tracked
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55 */
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56 public void install(ContentAssistant2 contentAssistant, Table table) {
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57 fContentAssistant= contentAssistant;
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58 fTable= table;
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59 if (Helper2.okToUse(fTable)) {
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60 Shell shell= fTable.getShell();
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61 if (Helper2.okToUse(shell)) {
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62 fShell= shell;
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63 fShell.addShellListener(this);
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64 }
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65 fTable.addFocusListener(this);
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66 fScrollbar= fTable.getVerticalBar();
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67 if (fScrollbar !is null)
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68 fScrollbar.addSelectionListener(this);
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69 }
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70 }
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71
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72 /**
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73 * Uninstalls this closer if previously installed.
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74 */
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75 public void uninstall() {
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76 fContentAssistant= null;
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77 if (Helper2.okToUse(fShell))
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78 fShell.removeShellListener(this);
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79 fShell= null;
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80 if (Helper2.okToUse(fScrollbar))
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81 fScrollbar.removeSelectionListener(this);
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82 if (Helper2.okToUse(fTable))
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83 fTable.removeFocusListener(this);
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84 }
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85
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86 /*
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87 * @see dwt.events.SelectionListener#widgetSelected(dwt.events.SelectionEvent)
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88 */
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89 public void widgetSelected(SelectionEvent e) {
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90 fScrollbarClicked= true;
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91 }
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92
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93 /*
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94 * @see dwt.events.SelectionListener#widgetDefaultSelected(dwt.events.SelectionEvent)
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95 */
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96 public void widgetDefaultSelected(SelectionEvent e) {
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97 fScrollbarClicked= true;
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98 }
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99
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100 /*
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101 * @see dwt.events.FocusListener#focusGained(dwt.events.FocusEvent)
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102 */
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103 public void focusGained(FocusEvent e) {
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104 }
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105
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106 /*
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107 * @see dwt.events.FocusListener#focusLost(dwt.events.FocusEvent)
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108 */
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109 public void focusLost(final FocusEvent e) {
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110 fScrollbarClicked= false;
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111 Display d= fTable.getDisplay();
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112 d.asyncExec(new Runnable() {
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113 public void run() {
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114 if (Helper2.okToUse(fTable) && !fTable.isFocusControl() && !fScrollbarClicked && fContentAssistant !is null)
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115 fContentAssistant.popupFocusLost(e);
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116 }
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117 });
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118 }
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119
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120 /*
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121 * @see dwt.events.ShellAdapter#shellDeactivated(dwt.events.ShellEvent)
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122 * @since 3.1
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123 */
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124 public void shellDeactivated(ShellEvent e) {
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125 if (fContentAssistant !is null)
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126 fContentAssistant.hide();
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127 }
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128
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129
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130 /*
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131 * @see dwt.events.ShellAdapter#shellClosed(dwt.events.ShellEvent)
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132 * @since 3.1
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133 */
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134 public void shellClosed(ShellEvent e) {
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135 if (fContentAssistant !is null)
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136 fContentAssistant.hide();
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137 }
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138 }
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