Demonstrates CheckboxTableViewer
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.window.ApplicationWindow;
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.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
/**
* This class demonstrates CheckboxTableViewer. It allows you to check files to
* copy, and copy them to a backup directory.
*/
public class BackupFiles extends ApplicationWindow {
// Used to show status
private Label status;
/**
* BackupFiles constructor
*/
public BackupFiles() {
super(null);
}
/**
* Runs the application
*/
public void run() {
// Don't return from open() until window closes
setBlockOnOpen(true);
// Open the main window
open();
// Dispose the display
Display.getCurrent().dispose();
}
/**
* Configures the shell
*
* @param shell
* the shell
*/
protected void configureShell(Shell shell) {
super.configureShell(shell);
// Set the title bar text and the size
shell.setText("Backup Files");
shell.setSize(400, 400);
}
/**
* Creates the main window's contents
*
* @param parent
* the main window
* @return Control
*/
protected Control createContents(Composite parent) {
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(new GridLayout(1, false));
// Create the source directory panel and its controls
final Text sourceDir = createFilePanelHelper(composite, "Source Dir:");
// Create the CheckboxTableViewer to display the files in the source dir
final CheckboxTableViewer ctv = CheckboxTableViewer.newCheckList(
composite, SWT.BORDER);
ctv.getTable().setLayoutData(new GridData(GridData.FILL_BOTH));
ctv.setContentProvider(new BackupFilesContentProvider());
ctv.setLabelProvider(new BackupFilesLabelProvider());
// Create the destination directory panel and its controls
final Text destDir = createFilePanelHelper(composite, "Dest Dir:");
// Create the Copy button
Button copy = new Button(composite, SWT.PUSH);
copy.setText("Copy");
// Create the status field
status = new Label(composite, SWT.NONE);
status.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// When the source directory changes, change the input for the viewer
sourceDir.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent event) {
ctv.setInput(((Text) event.widget).getText());
}
});
// When copy is pressed, copy the files
copy.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
// Get the checked elements
Object[] files = ctv.getCheckedElements();
if (files.length > 0) {
// Some files are checked; make sure we have a valid
// destination
File dest = new File(destDir.getText());
if (dest.isDirectory()) {
// Go through each file
for (int i = 0, n = files.length; i < n; i++) {
copyFile((File) files[i], dest);
}
} else
showMessage("You must select a valid destination directory");
} else
showMessage("You must select some files to copy");
}
});
return composite;
}
/**
* Helper method to create the label/text/button for a directory
*
* @param composite
* the parent composite
* @param label
* the text for the label
* @return Text
*/
private Text createFilePanelHelper(Composite composite, String label) {
// Create the composite to hold the controls
Composite panel = new Composite(composite, SWT.BORDER);
panel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
panel.setLayout(new GridLayout(3, false));
// Create the controls
new Label(panel, SWT.LEFT).setText(label);
Text text = new Text(panel, SWT.BORDER);
text.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Button browse = new Button(panel, SWT.PUSH);
// Add browsing
browse.setText("...");
browse.addSelectionListener(new DirectoryBrowser(text));
// Return the Text that holds the directory
return text;
}
/**
* Copies a file
*
* @param file
* the file to copy
* @param targetDir
* the directory to copy to
*/
private void copyFile(File file, File targetDir) {
BufferedInputStream in = null;
BufferedOutputStream out = null;
File destFile = new File(targetDir.getAbsolutePath() + File.separator
+ file.getName());
try {
showMessage("Copying " + file.getName());
in = new BufferedInputStream(new FileInputStream(file));
out = new BufferedOutputStream(new FileOutputStream(destFile));
int n;
while ((n = in.read()) != -1) {
out.write(n);
}
showMessage("Copied " + file.getName());
} catch (Exception e) {
showMessage("Cannot copy file " + file.getAbsolutePath());
} finally {
if (in != null)
try {
in.close();
} catch (Exception e) {
}
if (out != null)
try {
out.close();
} catch (Exception e) {
}
}
}
/**
* Shows a message
*
* @param message
* the message
*/
private void showMessage(String message) {
status.setText(message);
}
/**
* The application entry point
*
* @param args
* the command line arguments
*/
public static void main(String[] args) {
new BackupFiles().run();
}
}
/**
* This class returns the files in the specified directory. If the specified
* directory doesn't exist, it returns an empty array.
*/
class BackupFilesContentProvider implements IStructuredContentProvider {
private static final Object[] EMPTY = new Object[] {};
/**
* Gets the files in the specified directory
*
* @param arg0
* a String containing the directory
*/
public Object[] getElements(Object arg0) {
File file = new File((String) arg0);
if (file.isDirectory()) {
return file.listFiles(new FileFilter() {
public boolean accept(File pathName) {
// Ignore directories; return only files
return pathName.isFile();
}
});
}
return EMPTY;
}
/**
* Disposes any created resources
*/
public void dispose() {
// Nothing to dispose
}
/**
* Called when the input changes
*/
public void inputChanged(Viewer arg0, Object arg1, Object arg2) {
// Nothing to do
}
}
/**
* This class provides the labels for files
*/
class BackupFilesLabelProvider implements ILabelProvider {
/**
* Returns the image
*
* @param arg0
* the file
* @return Image
*/
public Image getImage(Object arg0) {
return null;
}
/**
* Returns the name of the file
*
* @param arg0
* the name of the file
* @return String
*/
public String getText(Object arg0) {
return ((File) arg0).getName();
}
/**
* Adds a listener
*
* @param arg0
* the listener
*/
public void addListener(ILabelProviderListener arg0) {
// Throw it away
}
/**
* Disposes any created resources
*/
public void dispose() {
// Nothing to dispose
}
/**
* Returns whether changing this property for this element affects the label
*
* @param arg0
* the element
* @param arg1
* the property
*/
public boolean isLabelProperty(Object arg0, String arg1) {
return false;
}
/**
* Removes a listener
*
* @param arg0
* the listener
*/
public void removeListener(ILabelProviderListener arg0) {
// Ignore
}
}
/**
* This class allows users to browse for a directory
*/
class DirectoryBrowser extends SelectionAdapter {
// The Text this browser is tied to
private Text text;
/**
* DirectoryBrowser constructor
*
* @param text
*/
public DirectoryBrowser(Text text) {
this.text = text;
}
/**
* Called when the browse button is pushed
*
* @param event
* the generated event
*/
public void widgetSelected(SelectionEvent event) {
DirectoryDialog dlg = new DirectoryDialog(Display.getCurrent()
.getActiveShell());
dlg.setFilterPath(text.getText());
String dir = dlg.open();
if (dir != null) {
text.setText(dir);
}
}
}
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