Java tutorial
/******************************************************************************* * Copyright (c) 2011, 2013 Wind River Systems, Inc. and others. All rights reserved. * This program and the accompanying materials are made available under the terms * of the Eclipse Public License v1.0 which accompanies this distribution, and is * available at http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Wind River Systems - initial API and implementation *******************************************************************************/ package org.eclipse.tcf.te.ui.dialogs; import java.util.Arrays; import java.util.Set; import org.eclipse.core.runtime.Assert; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; import org.eclipse.tcf.te.ui.help.IContextHelpIds; import org.eclipse.tcf.te.ui.jface.dialogs.CustomTitleAreaDialog; import org.eclipse.tcf.te.ui.nls.Messages; import org.eclipse.tcf.te.ui.swt.SWTControlUtil; /** * Dialog implementation allowing to enter the data for name/value pairs. */ public class NameValuePairDialog extends CustomTitleAreaDialog { private String name; private String value; private String dialogTitle; private String title; private String message; private String[] fieldLabels; private String[] initialValues; private Set<String> usedNames; private Text nameText; private Text valueText; /** * Constructor. * * @param shell The parent shell or <code>null</code>. * @param dialogTitle The dialog title. Must not be <code>null</code>. * @param title The title. Must not be <code>null</code>. * @param message The dialogs default message. Must not be <code>null</code>. * @param fieldLabels The field labels. Must not be <code>null</code>. * @param initialValues The field initial values. Must not be <code>null</code>. * @param usedNames The list of used names. Must not be <code>null</code>. */ public NameValuePairDialog(Shell shell, String dialogTitle, String title, String message, String[] fieldLabels, String[] initialValues, Set<String> usedNames) { super(shell, IContextHelpIds.NAME_VALUE_PAIR_DIALOG); Assert.isNotNull(dialogTitle); Assert.isNotNull(title); Assert.isNotNull(message); Assert.isNotNull(fieldLabels); Assert.isNotNull(initialValues); Assert.isNotNull(usedNames); this.dialogTitle = dialogTitle; this.title = title; this.message = message; this.fieldLabels = Arrays.copyOf(fieldLabels, fieldLabels.length); this.initialValues = Arrays.copyOf(initialValues, initialValues.length); this.usedNames = usedNames; } /* (non-Javadoc) * @see org.eclipse.tcf.te.ui.jface.dialogs.CustomTitleAreaDialog#createDialogAreaContent(org.eclipse.swt.widgets.Composite) */ @Override protected void createDialogAreaContent(Composite parent) { super.createDialogAreaContent(parent); setDialogTitle(dialogTitle); setTitle(title); setDefaultMessage(message, IMessageProvider.NONE); Composite panel = new Composite(parent, SWT.NONE); panel.setLayout(new GridLayout(2, false)); panel.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); Label label = new Label(panel, SWT.NONE); label.setText(fieldLabels[0]); nameText = new Text(panel, SWT.BORDER | SWT.SINGLE); nameText.setText(initialValues[0]); GridData layoutData = new GridData(SWT.FILL, SWT.CENTER, true, false); layoutData.widthHint = 300; nameText.setLayoutData(layoutData); nameText.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { updateButtons(); } }); label = new Label(panel, SWT.NONE); label.setText(fieldLabels[1]); valueText = new Text(panel, SWT.BORDER | SWT.SINGLE); valueText.setText(initialValues[1]); layoutData = new GridData(GridData.FILL_HORIZONTAL); layoutData.widthHint = 300; valueText.setLayoutData(layoutData); valueText.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { updateButtons(); } }); applyDialogFont(panel); } /** * Return the name/value pair entered in this dialog. * <p> * If the cancel button was hit, both will be <code>null</code>. */ public String[] getNameValuePair() { return new String[] { name, value }; } /* (non-Javadoc) * @see org.eclipse.tcf.te.ui.jface.dialogs.CustomTitleAreaDialog#create() */ @Override public void create() { super.create(); updateButtons(); } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int) */ @Override protected void buttonPressed(int buttonId) { if (buttonId == IDialogConstants.OK_ID) { name = SWTControlUtil.getText(nameText).trim(); value = SWTControlUtil.getText(valueText).trim(); } else { name = null; value = null; } super.buttonPressed(buttonId); } /** * Enable the OK button if valid input */ protected void updateButtons() { String name = SWTControlUtil.getText(nameText).trim(); String value = SWTControlUtil.getText(valueText).trim(); if (name.trim().length() == 0) { setMessage(getErrorMissingName(), IMessageProvider.INFORMATION); } else if (usedNames.contains(name.trim())) { setMessage(NLS.bind(getErrorUsedOrIllegalName(), name), IMessageProvider.ERROR); } else if (value.trim().length() == 0) { setMessage(NLS.bind(getErrorMissingValue(), name), IMessageProvider.INFORMATION); } else { setMessage(message, IMessageProvider.NONE); } getButton(IDialogConstants.OK_ID).setEnabled(getMessageType() == IMessageProvider.NONE); } /** * Returns the text to show as missing name error. */ protected String getErrorMissingName() { return Messages.NameValuePairDialog_missingName_error; } /** * Returns the text to show as used or illegal name error. */ protected String getErrorUsedOrIllegalName() { return Messages.NameValuePairDialog_usedOrIllegalName_error; } /** * Returns the text to show as missing value error. */ protected String getErrorMissingValue() { return Messages.NameValuePairDialog_missingValue_error; } }