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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet033CrossValidationControlDecoration.d @ 125:c43718956f21 default tip

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Updated the snippets status.
author Jacob Carlborg <doob@me.com>
date Thu, 11 Aug 2011 19:55:14 +0200
parents e884642ad36e
children
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1 /*******************************************************************************
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2 * Copyright (c) 2009 Matthew Hall 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 * Matthew Hall - initial API and implementation (bug 268472)
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10 ******************************************************************************/
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11
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12 module org.eclipse.jface.examples.databinding.snippets.Snippet033CrossValidationControlDecoration;
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13
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14 import java.lang.all;
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15
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16 import java.util.Date;
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17
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18 import org.eclipse.core.databinding.observable.Observables;
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19 import org.eclipse.core.databinding.observable.Realm;
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20 import org.eclipse.core.databinding.observable.value.IObservableValue;
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21 import org.eclipse.core.databinding.validation.MultiValidator;
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22 import org.eclipse.core.databinding.validation.ValidationStatus;
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23 import org.eclipse.core.runtime.IStatus;
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24 import org.eclipse.jface.databinding.swt.SWTObservables;
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25 import org.eclipse.jface.databinding.swt.WidgetProperties;
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26 import org.eclipse.jface.internal.databinding.provisional.fieldassist.ControlDecorationSupport;
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27 import org.eclipse.jface.internal.databinding.provisional.fieldassist.ControlDecorationUpdater;
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28 import org.eclipse.swt.SWT;
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29 import org.eclipse.swt.graphics.Image;
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30 import org.eclipse.swt.layout.GridData;
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31 import org.eclipse.swt.layout.GridLayout;
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32 import org.eclipse.swt.widgets.Composite;
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33 import org.eclipse.swt.widgets.DateTime;
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34 import org.eclipse.swt.widgets.Display;
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35 import org.eclipse.swt.widgets.Label;
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36 import org.eclipse.swt.widgets.Shell;
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37
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38 /**
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39 * @since 3.2
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40 *
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41 */
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42 public class Snippet033CrossValidationControlDecoration {
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43 protected Shell shell;
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44 private DateTime startDate;
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45 private DateTime endDate;
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46
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47 /**
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48 * Launch the application
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49 *
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50 * @param args
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51 */
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52 public static void main(String[] args) {
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53 try {
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54 Snippet033CrossValidationControlDecoration window = new Snippet033CrossValidationControlDecoration();
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55 window.open();
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56 } catch (Exception e) {
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57 e.printStackTrace();
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58 }
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59 }
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61 /**
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62 * Open the window
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63 */
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64 public void open() {
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65 final Display display = Display.getDefault();
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66 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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67 public void run() {
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68 createContents();
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69 shell.pack();
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70 shell.open();
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71 while (!shell.isDisposed()) {
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72 if (!display.readAndDispatch())
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73 display.sleep();
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74 }
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75 }
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76 });
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77 }
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79 protected void createContents() {
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80 shell = new Shell();
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81 GridLayout layout = new GridLayout();
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82 layout.numColumns = 4;
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83 shell.setLayout(layout);
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84 shell.setText("Snippet033CrossValidationControlDecoration.java");
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86 final Label label = new Label(shell, SWT.NONE);
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87 label.setLayoutData(new GridData());
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88 label.setText("Start date");
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89 startDate = new DateTime(shell, SWT.CALENDAR);
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90 final GridData gd_startDate = new GridData();
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91 gd_startDate.horizontalIndent = 10;
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92 startDate.setLayoutData(gd_startDate);
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94 final Label startDateLabel = new Label(shell, SWT.NONE);
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95 startDateLabel.setLayoutData(new GridData());
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96 startDateLabel.setText("End date");
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97 endDate = new DateTime(shell, SWT.CALENDAR);
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98 final GridData gd_endDate = new GridData();
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99 gd_endDate.horizontalIndent = 10;
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100 endDate.setLayoutData(gd_endDate);
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102 bindUI();
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103 }
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105 private void bindUI() {
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106 IObservableValue startDateObservable = WidgetProperties.selection()
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107 .observe(startDate);
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108 IObservableValue endDateObservable = WidgetProperties.selection()
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109 .observe(endDate);
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111 ControlDecorationSupport.create(new DateRangeValidator(
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112 startDateObservable, endDateObservable,
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113 "Start date must be on or before end date"), SWT.LEFT
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114 | SWT.CENTER);
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116 // Customize the decoration's description text and image
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117 ControlDecorationUpdater decorationUpdater = new ControlDecorationUpdater() {
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118 protected String getDescriptionText(IStatus status) {
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119 return "ERROR: " + super.getDescriptionText(status);
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120 }
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121
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122 protected Image getImage(IStatus status) {
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123 return status.isOK() ? null : Display.getCurrent()
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124 .getSystemImage(SWT.ICON_ERROR);
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125 }
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126 };
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127 ControlDecorationSupport.create(new DateRangeValidator(Observables
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128 .constantObservableValue(new Date()), startDateObservable,
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129 "Choose a starting date later than today"), SWT.LEFT | SWT.TOP,
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130 (Composite) null, decorationUpdater);
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131 }
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132
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133 private static class DateRangeValidator : MultiValidator {
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134 private final IObservableValue start;
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135 private final IObservableValue end;
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136 private final String errorMessage;
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138 public DateRangeValidator(IObservableValue start, IObservableValue end,
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139 String errorMessage) {
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140 this.start = start;
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141 this.end = end;
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142 this.errorMessage = errorMessage;
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143 }
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144
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145 protected IStatus validate() {
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146 Date startDate = (Date) start.getValue();
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147 Date endDate = (Date) end.getValue();
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148 if (startDate.compareTo(endDate) > 0)
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149 return ValidationStatus.error(errorMessage);
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150 return ValidationStatus.ok();
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151 }
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152 }
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153 }
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154 void main( String[] args ){
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155 Snippet033CrossValidationControlDecoration.main(args);
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156 }