Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2009 Tasktop Technologies 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: * Tasktop Technologies - initial API and implementation *******************************************************************************/ package org.eclipse.mylyn.internal.tasks.ui.wizards; import java.io.File; import java.util.SortedMap; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.mylyn.commons.ui.CommonImages; import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import org.eclipse.swt.widgets.Text; import com.ibm.icu.text.DateFormat; /** * Wizard Page for the Task Data Import Wizard * * @author Wesley Coelho * @author Mik Kersten * @author Rob Elves (Adaption to Import wizard) */ public class TaskDataImportWizardPage extends WizardPage { private Button browseButtonZip = null; private Text sourceZipText = null; private Button importViaBackupButton; private Button importViaZipButton; private Table backupFilesTable; // Key values for the dialog settings object private final static String SETTINGS_SAVED = Messages.TaskDataImportWizardPage_Import_Settings_saved; private final static String SOURCE_ZIP_SETTING = Messages.TaskDataImportWizardPage_Import_Source_zip_file_setting; private final static String IMPORT_ZIPMETHOD_SETTING = Messages.TaskDataImportWizardPage_Import_method_zip; private final static String IMPORT_BACKUPMETHOD_SETTING = Messages.TaskDataImportWizardPage_Import_method_backup; public TaskDataImportWizardPage() { super("org.eclipse.mylyn.tasklist.importPage"); //$NON-NLS-1$ setPageComplete(false); setMessage(Messages.TaskDataImportWizardPage_Importing_overwrites_current_tasks_and_repositories, IMessageProvider.WARNING); setImageDescriptor(CommonImages.BANNER_IMPORT); setTitle(Messages.TaskDataImportWizardPage_Restore_tasks_from_history); } public void createControl(Composite parent) { Composite container = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(3, false); layout.verticalSpacing = 15; container.setLayout(layout); createImportFromZipControl(container); createImportFromBackupControl(container); addRadioListeners(); initSettings(); Dialog.applyDialogFont(container); setControl(container); setPageComplete(validate()); } private void addRadioListeners() { SelectionListener radioListener = new SelectionListener() { public void widgetSelected(SelectionEvent e) { browseButtonZip.setEnabled(importViaZipButton.getSelection()); backupFilesTable.setEnabled(importViaBackupButton.getSelection()); sourceZipText.setEnabled(importViaZipButton.getSelection()); controlChanged(); } public void widgetDefaultSelected(SelectionEvent e) { // ignore } }; importViaZipButton.addSelectionListener(radioListener); importViaBackupButton.addSelectionListener(radioListener); } /** * Create widgets for specifying the source zip */ private void createImportFromZipControl(Composite parent) { importViaZipButton = new Button(parent, SWT.RADIO); importViaZipButton.setText(Messages.TaskDataImportWizardPage_From_zip_file); sourceZipText = new Text(parent, SWT.BORDER); sourceZipText.setEditable(true); GridDataFactory.fillDefaults().grab(true, false).hint(250, SWT.DEFAULT).applyTo(sourceZipText); sourceZipText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { controlChanged(); } }); browseButtonZip = new Button(parent, SWT.PUSH); browseButtonZip.setText(Messages.TaskDataImportWizardPage_Browse_); browseButtonZip.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { FileDialog dialog = new FileDialog(getShell()); dialog.setText(Messages.TaskDataImportWizardPage_Zip_File_Selection); String dir = sourceZipText.getText(); dialog.setFilterPath(dir); dir = dialog.open(); if (dir == null || dir.equals("")) { //$NON-NLS-1$ return; } sourceZipText.setText(dir); } }); } private void createImportFromBackupControl(Composite container) { importViaBackupButton = new Button(container, SWT.RADIO); importViaBackupButton.setText(Messages.TaskDataImportWizardPage_From_snapshot); addBackupFileView(container); } private void addBackupFileView(Composite composite) { backupFilesTable = new Table(composite, SWT.BORDER); GridDataFactory.fillDefaults().span(2, SWT.DEFAULT).grab(true, true).applyTo(backupFilesTable); TableColumn filenameColumn = new TableColumn(backupFilesTable, SWT.LEFT); filenameColumn.setWidth(200); SortedMap<Long, File> backupFilesMap = TasksUiPlugin.getBackupManager().getBackupFiles(); for (Long time : backupFilesMap.keySet()) { File file = backupFilesMap.get(time); TableItem item = new TableItem(backupFilesTable, SWT.NONE); item.setData(file.getAbsolutePath()); item.setText(DateFormat.getDateTimeInstance().format(time)); } backupFilesTable.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { controlChanged(); } }); } /** * Initializes controls with values from the Dialog Settings object */ protected void initSettings() { IDialogSettings settings = getDialogSettings(); if (settings.get(SETTINGS_SAVED) == null) { importViaZipButton.setSelection(true); sourceZipText.setEnabled(true); backupFilesTable.setEnabled(false); } else { // Retrieve previous values from the dialog settings importViaZipButton.setSelection(settings.getBoolean(IMPORT_ZIPMETHOD_SETTING)); importViaBackupButton.setSelection(settings.getBoolean(IMPORT_BACKUPMETHOD_SETTING)); browseButtonZip.setEnabled(importViaZipButton.getSelection()); sourceZipText.setEnabled(importViaZipButton.getSelection()); backupFilesTable.setEnabled(importViaBackupButton.getSelection()); String zipFile = settings.get(SOURCE_ZIP_SETTING); if (zipFile != null) { sourceZipText.setText(settings.get(SOURCE_ZIP_SETTING)); } } } @Override public void setVisible(boolean visible) { if (visible) { if (importViaZipButton.getSelection()) { sourceZipText.setFocus(); } else { importViaBackupButton.setFocus(); } } super.setVisible(visible); } /** * Saves the control values in the dialog settings to be used as defaults the next time the page is opened */ public void saveSettings() { IDialogSettings settings = getDialogSettings(); settings.put(IMPORT_ZIPMETHOD_SETTING, importViaZipButton.getSelection()); settings.put(IMPORT_BACKUPMETHOD_SETTING, importViaBackupButton.getSelection()); settings.put(SETTINGS_SAVED, SETTINGS_SAVED); } /** Called to indicate that a control's value has changed */ public void controlChanged() { setPageComplete(validate()); } /** Returns true if the information entered by the user is valid */ protected boolean validate() { if (importViaZipButton.getSelection() && sourceZipText.getText().equals("")) { //$NON-NLS-1$ return false; } if (importViaBackupButton.getSelection() && backupFilesTable.getSelection().length == 0) { return false; } return true; } public String getSourceZipFile() { if (importViaZipButton.getSelection()) { return sourceZipText.getText(); } else { if (backupFilesTable.getSelectionIndex() != -1) { return (String) (backupFilesTable.getSelection()[0].getData()); } } return Messages.TaskDataImportWizardPage__unspecified_; } /** For testing only. Sets controls to the specified values */ public void setSource(boolean zip, String sourceZip) { sourceZipText.setText(sourceZip); importViaZipButton.setSelection(zip); } }