File Browser JFace : Table « SWT JFace Eclipse « Java
File Browser JFace
/******************************************************************************
* All Right Reserved.
* Copyright (c) 1998, 2004 Jackwind Li Guojie
*
* Created on Mar 12, 2004 11:51:42 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.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
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.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.ToolBar;
public class FileBrowserJFace {
Display display = new Display();
Shell shell = new Shell(display);
File rootDir;
TreeViewer treeViewer;
public FileBrowserJFace() {
Action actionSetRootDir = new Action("Set Root Dir") {
public void run() {
DirectoryDialog dialog = new DirectoryDialog(shell);
String path = dialog.open();
if (path != null) {
treeViewer.setInput(new File(path));
}
}
};
final ViewerFilter directoryFilter = new ViewerFilter() {
public boolean select(
Viewer viewer,
Object parentElement,
Object element) {
return ((File)element).isDirectory();
}
};
Action actionShowDirectoriesOnly = new Action("Show directories only") {
public void run() {
if(! isChecked())
treeViewer.removeFilter(directoryFilter);
else
treeViewer.addFilter(directoryFilter);
}
};
actionShowDirectoriesOnly.setChecked(false);
Action actionDeleteFile = new Action("Delete the selected file") {
public void run() {
IStructuredSelection selection = (IStructuredSelection)treeViewer.getSelection();
File file = (File)selection.getFirstElement();
if(file == null) {
System.out.println("Please select a file first.");
return;
}
MessageBox messageBox = new MessageBox(shell, SWT.YES | SWT.NO);
messageBox.setMessage("Are you sure to delete file: " + file.getName() + "?");
if(messageBox.open() == SWT.YES) {
File parentFile = file.getParentFile();
if(file.delete()) {
System.out.println("File has been deleted. ");
// Notifies the viewer for update.
treeViewer.refresh(parentFile, false);
}else{
System.out.println("Unable to delete file.");
}
}
}
};
ToolBar toolBar = new ToolBar(shell, SWT.FLAT);
ToolBarManager manager = new ToolBarManager(toolBar);
manager.add(actionSetRootDir);
manager.add(actionShowDirectoriesOnly);
manager.add(actionDeleteFile);
manager.update(true);
shell.setLayout(new GridLayout());
treeViewer = new TreeViewer(shell, SWT.BORDER);
treeViewer.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));
// Sets the content provider.
treeViewer.setContentProvider(new ITreeContentProvider() {
public Object[] getChildren(Object parentElement) {
File[] files = ((File)parentElement).listFiles();
if(files == null)
return new Object[0];
return files;
}
public Object getParent(Object element) {
return ((File)element).getParentFile();
}
public boolean hasChildren(Object element) {
File file = (File)element;
File[] files = file.listFiles();
if(files == null || files.length == 0)
return false;
return true;
}
public Object[] getElements(Object inputElement) {
File[] files = ((File)inputElement).listFiles();
if(files == null)
return new Object[0];
return files;
}
public void dispose() {
}
public void inputChanged(
Viewer viewer,
Object oldInput,
Object newInput) {
shell.setText("Now browsing: " + newInput);
}
});
// Sets the label provider.
treeViewer.setLabelProvider(new LabelProvider() {
public Image getImage(Object element) {
return getIcon((File)element);
}
public String getText(Object element) {
return ((File)element).getName();
}
});
// Sorts the tree.
treeViewer.setSorter(new ViewerSorter() {
public int category(Object element) {
File file = (File)element;
if(file.isDirectory())
return 0;
else
return 1;
}
});
treeViewer.setInput(new File("C:/"));
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;
}
}
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 FileBrowserJFace();
}
}
