Java tutorial
/******************************************************************************* * Copyright (c) 2008 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.ecf.internal.filetransfer.ui; import java.io.File; import java.net.URL; import org.eclipse.jface.dialogs.*; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.events.*; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.*; public class StartFileDownloadDialog extends InputDialog { private Text useridText; private Text passwordText; public String userid; public String passwd; public String filename; protected Text fileLocation; String filePath; public StartFileDownloadDialog(Shell parentShell, String startURL) { super(parentShell, Messages.getString("StartFileDownloadDialog.FileTransfer"), //$NON-NLS-1$ Messages.getString("StartFileDownloadDialog.Source"), startURL, null); //$NON-NLS-1$ filePath = Activator.getDefault().getPreferenceStore().getString(Activator.DOWNLOAD_PATH_PREFERENCE); filePath = (filePath == null) ? "" : filePath; //$NON-NLS-1$ } String getFullDownloadPath(String path, String fileName) { if (fileName == null) return filePath; String result = filePath; if (!result.endsWith(File.separator)) { result = result + File.separator; } return result + fileName; } public StartFileDownloadDialog(Shell parentShell) { this(parentShell, null); } Text getInputText() { return getText(); } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#create() */ public void create() { super.create(); Button okButton = getButton(IDialogConstants.OK_ID); okButton.setText(Messages.getString("StartFileDownloadDialog.DOWNLOAD_BUTTON")); //$NON-NLS-1$ okButton.setToolTipText(Messages.getString("StartFileDownloadDialog.DOWNLOAD_BUTTON_TOOLTIP")); //$NON-NLS-1$ URL url = validateURL(); if (url != null) { String fileName = getFileNameFromURL(); if (!"".equals(fileName)) { //$NON-NLS-1$ fileLocation.setText(getFullDownloadPath(filePath, fileName)); useridText.setFocus(); } String user = url.getUserInfo(); if (user != null) { useridText.setText(user); passwordText.setFocus(); } okButton.setEnabled(true); } else okButton.setEnabled(false); } URL validateURL() { String text = getInputText().getText(); URL result = null; try { if (!"".equals(text)) { //$NON-NLS-1$ result = new URL(text); } } catch (Exception e) { setErrorMessage((NLS.bind(Messages.getString("StartFileDownloadDialog.MalformedURLException"), text))); //$NON-NLS-1$ return null; } setErrorMessage(null); return result; } String getFileNameFromURL() { String scp = getInputText().getText(); String fileName = ""; //$NON-NLS-1$ if (scp != null && scp.length() > 0) { fileName = scp.substring(scp.lastIndexOf('/') + 1); } return fileName; } String getCurrentDirectory() { String currentDirectory = fileLocation.getText(); return currentDirectory.substring(0, currentDirectory.lastIndexOf(File.separator)); } protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); Label label = new Label(composite, SWT.WRAP); label.setText(Messages.getString("StartFileDownloadDialog.OutputFile")); //$NON-NLS-1$ GridData data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER); data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH); label.setLayoutData(data); label.setFont(parent.getFont()); fileLocation = new Text(composite, SWT.SINGLE | SWT.BORDER); fileLocation.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); fileLocation.setText(filePath); fileLocation.setSelection(fileLocation.getText().length()); Text text = getInputText(); text.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { validateURL(); } }); text.addFocusListener(new FocusListener() { public void focusGained(FocusEvent e) { // nothing } public void focusLost(FocusEvent e) { fileLocation.setText(getFullDownloadPath(getCurrentDirectory(), getFileNameFromURL())); fileLocation.setSelection(fileLocation.getText().length()); } }); final Button fileBrowse = new Button(composite, SWT.PUSH); fileBrowse.setText(Messages.getString("StartFileDownloadDialog.Browse")); //$NON-NLS-1$ fileBrowse.addListener(SWT.Selection, new Listener() { public void handleEvent(Event event) { if (event.type == SWT.Selection) { String fileName = getFileNameFromURL(); FileDialog fd = new FileDialog(fileBrowse.getShell(), SWT.SAVE); fd.setText(Messages.getString("StartFileDownloadDialog.OutputFile")); //$NON-NLS-1$ fd.setFileName(fileName); fd.setFilterPath(getCurrentDirectory()); String fname = fd.open(); if (fname != null) { fileLocation.setText(fname); fileLocation.setSelection(fileLocation.getText().length()); } } } }); label = new Label(composite, SWT.WRAP); label.setText(Messages.getString("StartFileDownloadDialog.Userid")); //$NON-NLS-1$ data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER); data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH); label.setLayoutData(data); label.setFont(parent.getFont()); useridText = new Text(composite, SWT.SINGLE | SWT.BORDER); useridText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL)); useridText.setText(System.getProperty("user.name")); //$NON-NLS-1$ useridText.setSelection(useridText.getText().length()); label = new Label(composite, SWT.WRAP); label.setText(Messages.getString("StartFileDownloadDialog.Password")); //$NON-NLS-1$ data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER); data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH); label.setLayoutData(data); label.setFont(parent.getFont()); passwordText = new Text(composite, SWT.SINGLE | SWT.BORDER | SWT.PASSWORD); passwordText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL)); applyDialogFont(composite); return composite; } protected void buttonPressed(int buttonId) { if (buttonId == IDialogConstants.OK_ID) { userid = useridText.getText(); passwd = passwordText.getText(); filename = fileLocation.getText(); File f = new File(filename); if (f.exists()) { if (MessageDialog.openQuestion(getShell(), Messages.getString("StartFileDownloadDialog.FILE_EXISTS_TITLE"), //$NON-NLS-1$ NLS.bind(Messages.getString("StartFileDownloadDialog.FILE_EXISTS_MESSAGE"), filename))) { //$NON-NLS-1$ super.buttonPressed(buttonId); } else fileLocation.setFocus(); return; } } super.buttonPressed(buttonId); } }