Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2004 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 *******************************************************************************/ import java.io.File; import org.eclipse.swt.SWT; import org.eclipse.swt.awt.SWT_AWT; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Sash; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeItem; public class SystemFileTree { public static void main(String[] args) { final Display display = new Display(); final Shell shell = new Shell(display); RGB color = shell.getBackground().getRGB(); Label separator1 = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); Label locationLb = new Label(shell, SWT.NONE); locationLb.setText("Location:"); Composite locationComp = new Composite(shell, SWT.EMBEDDED); Label separator2 = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); final Composite comp = new Composite(shell, SWT.NONE); final Tree fileTree = new Tree(comp, SWT.SINGLE | SWT.BORDER); Sash sash = new Sash(comp, SWT.VERTICAL); Composite tableComp = new Composite(comp, SWT.EMBEDDED); Label separator3 = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); Composite statusComp = new Composite(shell, SWT.EMBEDDED); java.awt.Frame locationFrame = SWT_AWT.new_Frame(locationComp); final java.awt.TextField locationText = new java.awt.TextField(); locationFrame.add(locationText); java.awt.Frame statusFrame = SWT_AWT.new_Frame(statusComp); statusFrame.setBackground(new java.awt.Color(color.red, color.green, color.blue)); final java.awt.Label statusLabel = new java.awt.Label(); statusFrame.add(statusLabel); statusLabel.setText("Select a file"); sash.addListener(SWT.Selection, new Listener() { public void handleEvent(Event e) { if (e.detail == SWT.DRAG) return; GridData data = (GridData) fileTree.getLayoutData(); Rectangle trim = fileTree.computeTrim(0, 0, 0, 0); data.widthHint = e.x - trim.width; comp.layout(); } }); File[] roots = File.listRoots(); for (int i = 0; i < roots.length; i++) { File file = roots[i]; TreeItem treeItem = new TreeItem(fileTree, SWT.NONE); treeItem.setText(file.getAbsolutePath()); treeItem.setData(file); new TreeItem(treeItem, SWT.NONE); } fileTree.addListener(SWT.Expand, new Listener() { public void handleEvent(Event e) { TreeItem item = (TreeItem) e.item; if (item == null) return; if (item.getItemCount() == 1) { TreeItem firstItem = item.getItems()[0]; if (firstItem.getData() != null) return; firstItem.dispose(); } else { return; } File root = (File) item.getData(); File[] files = root.listFiles(); if (files == null) return; for (int i = 0; i < files.length; i++) { File file = files[i]; if (file.isDirectory()) { TreeItem treeItem = new TreeItem(item, SWT.NONE); treeItem.setText(file.getName()); treeItem.setData(file); new TreeItem(treeItem, SWT.NONE); } } } }); fileTree.addListener(SWT.Selection, new Listener() { public void handleEvent(Event e) { TreeItem item = (TreeItem) e.item; if (item == null) return; final File root = (File) item.getData(); statusLabel.setText(root.getAbsolutePath()); locationText.setText(root.getAbsolutePath()); } }); GridLayout layout = new GridLayout(4, false); layout.marginWidth = layout.marginHeight = 0; layout.horizontalSpacing = layout.verticalSpacing = 1; shell.setLayout(layout); GridData data; data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 4; separator1.setLayoutData(data); data = new GridData(); data.horizontalSpan = 1; data.horizontalIndent = 10; locationLb.setLayoutData(data); data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 2; data.heightHint = locationText.getPreferredSize().height; locationComp.setLayoutData(data); data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 1; data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 4; separator2.setLayoutData(data); data = new GridData(GridData.FILL_BOTH); data.horizontalSpan = 4; comp.setLayoutData(data); data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 4; separator3.setLayoutData(data); data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 4; data.heightHint = statusLabel.getPreferredSize().height; statusComp.setLayoutData(data); layout = new GridLayout(3, false); layout.marginWidth = layout.marginHeight = 0; layout.horizontalSpacing = layout.verticalSpacing = 1; comp.setLayout(layout); data = new GridData(GridData.FILL_VERTICAL); data.widthHint = 200; fileTree.setLayoutData(data); data = new GridData(GridData.FILL_VERTICAL); sash.setLayoutData(data); data = new GridData(GridData.FILL_BOTH); tableComp.setLayoutData(data); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } }