File Browser Sample
/*******************************************************************************
* All Right Reserved. Copyright (c) 1998, 2004 Jackwind Li Guojie
*
* Created on Mar 9, 2004 7:07:16 PM by JACK $Id$
*
******************************************************************************/
import java.io.File;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ToolBarManager;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TreeEditor;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.events.TreeEvent;
import org.eclipse.swt.events.TreeListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.program.Program;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
public class FileBrowserSample {
Display display = new Display();
Shell shell = new Shell(display);
Tree tree;
File rootDir;
public FileBrowserSample() {
Action actionSetRootDir = new Action("Set Root Dir") {
public void run() {
DirectoryDialog dialog = new DirectoryDialog(shell);
String path = dialog.open();
if (path != null) {
setRootDir(new File(path));
}
}
};
ToolBar toolBar = new ToolBar(shell, SWT.FLAT);
ToolBarManager manager = new ToolBarManager(toolBar);
manager.add(actionSetRootDir);
manager.update(true);
shell.setLayout(new GridLayout());
tree = new Tree(shell, SWT.BORDER);
tree.setLayoutData(new GridData(GridData.FILL_BOTH));
setRootDir(new File("C:/"));
tree.addTreeListener(new TreeListener() {
public void treeCollapsed(TreeEvent e) {
}
public void treeExpanded(TreeEvent e) {
TreeItem item = (TreeItem) e.item;
TreeItem[] children = item.getItems();
for (int i = 0; i < children.length; i++)
if (children[i].getData() == null)
children[i].dispose();
else // Child files already added to the tree.
return;
File[] files = ((File) item.getData()).listFiles();
for (int i = 0; files != null && i < files.length; i++)
addFileToTree(item, files[i]);
}
});
tree.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
}
// Gets called when a tree item is double-clicked.
public void widgetDefaultSelected(SelectionEvent e) {
TreeItem item = (TreeItem) e.item;
File file = (File) item.getData();
if (Program.launch(file.getAbsolutePath())) {
System.out.println("File has been launched: " + file);
} else {
System.out.println("Unable to launch file: " + file);
}
}
});
final TreeEditor editor = new TreeEditor(tree);
tree.addListener(SWT.MouseDown, new Listener() {
public void handleEvent(Event event) {
// Locate the cell position.
Point point = new Point(event.x, event.y);
final TreeItem item = tree.getItem(point);
if (item == null)
return;
final Text text = new Text(tree, SWT.NONE);
text.setText(item.getText());
text.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_YELLOW));
editor.horizontalAlignment = SWT.LEFT;
editor.grabHorizontal = true;
editor.setEditor(text, item);
Listener textListener = new Listener() {
public void handleEvent(final Event e) {
switch (e.type) {
case SWT.FocusOut :
File renamed =
renameFile(
(File) item.getData(),
text.getText());
if (renamed != null) {
item.setText(text.getText());
item.setData(renamed);
}
text.dispose();
break;
case SWT.Traverse :
switch (e.detail) {
case SWT.TRAVERSE_RETURN :
renamed =
renameFile(
(File) item.getData(),
text.getText());
if (renamed != null) {
item.setText(text.getText());
item.setData(renamed);
}
//FALL THROUGH
case SWT.TRAVERSE_ESCAPE :
text.dispose();
e.doit = false;
}
break;
}
}
};
text.addListener(SWT.FocusOut, textListener);
text.addListener(SWT.Traverse, textListener);
text.setFocus();
}
});
shell.setSize(400, 260);
shell.open();
//textUser.forceFocus();
// Set up the event loop.
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
// If no more entries in event queue
display.sleep();
}
}
display.dispose();
}
/**
* Renames a file.
*
* @param file
* @param newName
* @return the after after being renamed or <code>null</code> if renaming
* fails.
*/
private File renameFile(File file, String newName) {
File dest = new File(file.getParentFile(), newName);
if (file.renameTo(dest)) {
return dest;
} else {
return null;
}
}
/**
* Sets the root directory to browse from.
*
* @param root
*/
private void setRootDir(File root) {
// validates the root first.
if( (!root.isDirectory()) || (!root.exists()))
throw new IllegalArgumentException("Invalid root: " + root);
this.rootDir = root;
shell.setText("Now browsing: " + root.getAbsolutePath());
// Remove all the items in the tree.
if (tree.getItemCount() > 0) {
TreeItem[] items = tree.getItems();
for (int i = 0; i < items.length; i++) {
items[i].dispose();
// Dispose itself and all of its descendants.
}
}
// Adds files under the root to the tree.
File[] files = root.listFiles();
for(int i=0; files != null && i < files.length; i++)
addFileToTree(tree, files[i]);
}
/**
* Adds the given file to the tree.
*
* @param parent
* @param file
*/
private void addFileToTree(Object parent, File file) {
TreeItem item = null;
if (parent instanceof Tree)
item = new TreeItem((Tree) parent, SWT.NULL);
else if (parent instanceof TreeItem)
item = new TreeItem((TreeItem) parent, SWT.NULL);
else
throw new IllegalArgumentException(
"parent should be a tree or a tree item: " + parent);
item.setText(file.getName());
item.setImage(getIcon(file));
item.setData(file);
if (file.isDirectory()) {
// // recursively adds all the children of this file.
// File[] files = file.listFiles();
// for(int i=0; i<files.length; i++)
// buildTree(item, files[i]);
if (file.list() != null && file.list().length > 0)
new TreeItem(item, SWT.NULL);
}
}
private ImageRegistry imageRegistry;
Image iconFolder = new Image(shell.getDisplay(), "java2s.gif");
Image iconFile = new Image(shell.getDisplay(), "java2s.gif");
/**
* Returns an icon representing the specified file.
*
* @param file
* @return
*/
private Image getIcon(File file) {
if (file.isDirectory())
return iconFolder;
int lastDotPos = file.getName().indexOf('.');
if (lastDotPos == -1)
return iconFile;
Image image = getIcon(file.getName().substring(lastDotPos + 1));
return image == null ? iconFile : image;
}
/**
* Returns the icon for the file type with the specified extension.
*
* @param extension
* @return
*/
private Image getIcon(String extension) {
if (imageRegistry == null)
imageRegistry = new ImageRegistry();
Image image = imageRegistry.get(extension);
if (image != null)
return image;
Program program = Program.findProgram(extension);
ImageData imageData = (program == null ? null : program.getImageData());
if (imageData != null) {
image = new Image(shell.getDisplay(), imageData);
imageRegistry.put(extension, image);
} else {
image = iconFile;
}
return image;
}
public static void main(String[] args) {
new FileBrowserSample();
}
}
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