plugins/org.eclipse.wst.server.ui/serverui/org/eclipse/wst/server/ui/internal/audio/AudioPreferencePage.java - servertools/webtools.servertools - Git at Google

 /*******************************************************************************
  * Copyright (c) 2003, 2011 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.wst.server.ui.internal.audio;

 import java.net.URL;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.HashMap;
 import java.util.Iterator;

 import org.eclipse.core.runtime.*;
 import org.eclipse.swt.events.*;
 import org.eclipse.jface.viewers.*;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.help.IWorkbenchHelpSystem;
 import org.eclipse.wst.server.ui.internal.ContextIds;
 import org.eclipse.wst.server.ui.internal.Messages;
 import org.eclipse.wst.server.ui.internal.SWTUtil;
 import org.eclipse.wst.server.ui.internal.Trace;
 /**
  * Audio preference page.
  */
 public class AudioPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {
 	protected Button enableButton;
 	protected Spinner volume;

 	protected Map<String, IPath> userSoundMap;

 	protected CategoryTableViewer viewer;

 	boolean soundAvailable = true;

 	/**
 	 * AudioPreferencePage constructor comment.
 	 */
 	public AudioPreferencePage() {
 		super();

 		loadUserMapInfo();
 	}

 	protected IPath chooseAudioFile() {
 		FileDialog dialog = new FileDialog(getShell(), SWT.SINGLE);
 		dialog.setText(Messages.audioPrefSelectFile);
 		dialog.setFilterExtensions(new String[] {"*.au;*.wav"});
 		dialog.setFilterPath(null);
 		dialog.open();

 		String[] filenames = dialog.getFileNames();
 		if (filenames != null && filenames.length > 0) {
 			String filterPath = dialog.getFilterPath();
 			return new Path(filterPath + java.io.File.separator + filenames[0]);
 		}
 		return null;
 	}

 	/**
 	 * Creates and returns the SWT control for the customized body
 	 * of this preference page under the given parent composite.
 	 * <p>
 	 * This framework method must be implemented by concrete
 	 * subclasses.
 	 * </p>
 	 *
 	 * @param parent the parent composite
 	 * @return the new control
 	 */
 	protected Control createContents(Composite parent) {
 		initializeDialogUnits(parent);
 		IWorkbenchHelpSystem whs = PlatformUI.getWorkbench().getHelpSystem();
 		whs.setHelp(parent, ContextIds.AUDIO_PREFERENCES);

 		final AudioCore core = AudioCore.getInstance();

 		Composite composite = new Composite(parent, SWT.NONE);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 3;
 		layout.horizontalSpacing = convertHorizontalDLUsToPixels(4);
 		layout.verticalSpacing = convertVerticalDLUsToPixels(3);
 		layout.marginWidth = 0;
 		layout.marginHeight = 0;
 		composite.setLayout(layout);
 		GridData data = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL);
 		composite.setLayoutData(data);

 		enableButton = new Button(composite, SWT.CHECK);
 		enableButton.setText(Messages.audioPrefEnable);
 		enableButton.setSelection(AudioCore.getInstance().isSoundEnabled());
 		data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		data.horizontalSpan = 3;
 		enableButton.setLayoutData(data);
 		whs.setHelp(enableButton, ContextIds.AUDIO_PREFERENCES_ENABLE);

 		final Label volumeLabel = new Label(composite, SWT.NONE);
 		volumeLabel.setText(Messages.audioPrefVolume);
 		data = new GridData();
 		data.horizontalIndent = 20;
 		volumeLabel.setLayoutData(data);
 		volumeLabel.setEnabled(enableButton.getSelection());

 		volume = new Spinner(composite, SWT.BORDER);
 		volume.setMinimum(0);
 		volume.setMaximum(20);
 		volume.setSelection(AudioCore.getInstance().getVolume());
 		data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 		data.horizontalSpan = 2;
 		data.widthHint = 60;
 		volume.setLayoutData(data);
 		volume.setEnabled(enableButton.getSelection());
 		whs.setHelp(volume, ContextIds.AUDIO_PREFERENCES_VOLUME);

 		enableButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				volumeLabel.setEnabled(enableButton.getSelection());
 				volume.setEnabled(enableButton.getSelection());
 			}
 		});

 		Label label = new Label(composite, SWT.NONE);
 		data = new GridData();
 		data.horizontalSpan = 3;
 		label.setLayoutData(data);

 		label = new Label(composite, SWT.NONE);
 		label.setText(Messages.audioPrefSounds);
 		data = new GridData();
 		data.horizontalSpan = 3;
 		label.setLayoutData(data);

 		final Table table = new Table(composite, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.SINGLE | SWT.FULL_SELECTION | SWT.CHECK);
 		data = new GridData(GridData.FILL_BOTH);
 		data.horizontalSpan = 2;
 		table.setLayoutData(data);
 		whs.setHelp(table, ContextIds.AUDIO_PREFERENCES_SOUNDS_TABLE);

 		viewer = new CategoryTableViewer(table);

 		TableLayout tableLayout = new TableLayout();
 		table.setLayout(tableLayout);
 		table.setHeaderVisible(true);

 		tableLayout.addColumnData(new ColumnPixelData(23, false));
 		TableColumn col = new TableColumn(table, SWT.CENTER, 0);
 		col.setResizable(false);

 		tableLayout.addColumnData(new ColumnWeightData(11, 110, true));
 		col = new TableColumn(table, SWT.NONE, 1);
 		col.setText(Messages.audioPrefSound);
 		col.setResizable(true);

 		tableLayout.addColumnData(new ColumnWeightData(15, 150, true));
 		col = new TableColumn(table, SWT.NONE, 2);
 		col.setText(Messages.audioPrefFile);
 		col.setResizable(true);

 		viewer.setContentProvider(new AudioTableContentProvider());
 		viewer.setLabelProvider(new AudioTableLabelProvider(this));
 		viewer.setInput("root");

 		setCheckState(viewer);

 		viewer.addCheckStateListener(new ICheckStateListener() {
 			public void checkStateChanged(CheckStateChangedEvent event) {
 				boolean checked = event.getChecked();
 				Object obj = event.getElement();

 				if (obj instanceof String) {
 					String id = (String) obj;
 					core.setCategoryEnabled(id, checked);
 					//viewer.refresh();
 					Iterator iterator = AudioTableContentProvider.getSoundsByCategory(id).iterator();
 					while (iterator.hasNext()) {
 						Sound s = (Sound) iterator.next();
 						viewer.setChecked(s, checked);
 						core.setSoundEnabled(s.getId(), checked);
 					}
 				} else {
 					Sound sound = (Sound) obj;
 					core.setSoundEnabled(sound.getId(), checked);
 				}
 			}
 		});

 		Composite right = new Composite(composite, SWT.NONE);
 		layout = new GridLayout();
 		layout.numColumns = 1;
 		layout.horizontalSpacing = convertHorizontalDLUsToPixels(4);
 		layout.verticalSpacing = convertVerticalDLUsToPixels(4);
 		layout.marginWidth = 0;
 		layout.marginHeight = 0;
 		right.setLayout(layout);
 		data = new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.VERTICAL_ALIGN_FILL);
 		right.setLayoutData(data);

 		// play button and table selection listener
 		final Button playButton = SWTUtil.createButton(right, Messages.audioPrefPlay);
 		playButton.setEnabled(false);
 		whs.setHelp(playButton, ContextIds.AUDIO_PREFERENCES_PLAY);

 		final Button browseButton = SWTUtil.createButton(right, Messages.audioPrefBrowse);
 		browseButton.setEnabled(false);
 		whs.setHelp(browseButton, ContextIds.AUDIO_PREFERENCES_BROWSE);

 		final Button resetButton = SWTUtil.createButton(right, Messages.audioPrefReset);
 		resetButton.setEnabled(false);
 		whs.setHelp(resetButton, ContextIds.AUDIO_PREFERENCES_RESET);

 		viewer.addSelectionChangedListener(new ISelectionChangedListener() {
 			public void selectionChanged(SelectionChangedEvent event) {
 				try {
 					IStructuredSelection sel = (IStructuredSelection) event.getSelection();
 					Object obj = sel.getFirstElement();
 					if (obj instanceof Sound) {
 						Sound sound = (Sound) obj;
 						URL url = getSoundURL(sound.getId());
 						if (url != null && soundAvailable)
 							playButton.setEnabled(true);
 						else
 							playButton.setEnabled(false);
 						browseButton.setEnabled(true);

 						if (getUserSoundPath(sound.getId()) != null)
 							resetButton.setEnabled(true);
 						else
 							resetButton.setEnabled(false);
 					} else {
 						playButton.setEnabled(false);
 						browseButton.setEnabled(false);
 						resetButton.setEnabled(false);
 					}
 				} catch (Exception ex) {
 					if (Trace.SEVERE) {
 						Trace.trace(Trace.STRING_SEVERE, "Error in table selection", ex);
 					}
 				}
 			}
 		});

 		soundAvailable = AudioCore.isAudioSupported();
 		if (soundAvailable) {
 			playButton.addSelectionListener(new SelectionAdapter() {
 				public void widgetSelected(SelectionEvent e) {
 					try {
 						int sel = table.getSelectionIndex();
 						Sound sound = (Sound) table.getItem(sel).getData();
 						AudioCore.playSound(getSoundURL(sound.getId()), volume.getSelection());
 					} catch (Exception ex) {
 						if (Trace.SEVERE) {
 							Trace.trace(Trace.STRING_SEVERE, "Error in table selection", ex);
 						}
 					}
 				}
 			});
 		} else
 			playButton.setEnabled(false);

 		browseButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				try {
 					IPath path = chooseAudioFile();
 					if (path != null) {
 						int sel = table.getSelectionIndex();
 						Sound sound = (Sound) table.getItem(sel).getData();
 						setUserSoundPath(sound.getId(), path);
 						viewer.refresh(sound);
 						playButton.setEnabled(true);
 					}
 				} catch (Exception ex) {
 					if (Trace.SEVERE) {
 						Trace.trace(Trace.STRING_SEVERE, "Error browsing", ex);
 					}
 				}
 			}
 		});

 		resetButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				try {
 					int sel = table.getSelectionIndex();
 					Sound sound = (Sound) table.getItem(sel).getData();
 					removeUserSoundPath(sound.getId());
 					viewer.refresh(sound);
 					//playButton.setEnabled(true);
 				} catch (Exception ex) {
 					if (Trace.SEVERE) {
 						Trace.trace(Trace.STRING_SEVERE, "Error reseting sound", ex);
 					}
 				}
 			}
 		});

 		Dialog.applyDialogFont(composite);

 		return composite;
 	}

 	protected void setCheckState(CheckboxTableViewer viewer) {
 		AudioCore core = AudioCore.getInstance();

 		Map<String, String> categories = core.getCategories();

 		// first, find all the categories and sort
 		List<String> cats = new ArrayList<String>();
 		Iterator iterator = categories.keySet().iterator();
 		while (iterator.hasNext())
 			cats.add((String)iterator.next());

 		// list them, ignoring empty ones
 		iterator = categories.keySet().iterator();
 		while (iterator.hasNext()) {
 			String id = (String) iterator.next();
 			List l = AudioTableContentProvider.getSoundsByCategory(id);
 			if (!l.isEmpty()) {
 				if (core.isCategoryEnabled(id))
 					viewer.setChecked(id, true);

 				int size = l.size();
 				for (int i = 0; i < size; i++) {
 					Sound s = (Sound) l.get(i);
 					if (core.isSoundEnabled(s.getId()))
 						viewer.setChecked(s, true);
 				}
 			}
 		}

 		// finally, list the "misc" sounds
 		List l = AudioTableContentProvider.getSoundsByCategory(null);
 		if (!l.isEmpty()) {
 			int size = l.size();
 			for (int i = 0; i < size; i++) {
 				Sound s = (Sound) l.get(i);
 				if (core.isSoundEnabled(s.getId()))
 					viewer.setChecked(s, true);
 			}
 		}
 	}

 	/**
 	 *
 	 * @return org.eclipse.core.runtime.IPath
 	 * @param id java.lang.String
 	 */
 	protected URL getSoundURL(String id) {
 		try {
 			IPath path = userSoundMap.get(id);
 			if (path != null)
 				return path.toFile().toURL();
 		} catch (Exception e) {
 			// ignore
 		}

 		return AudioCore.getInstance().getSound(id).getLocation();
 	}

 	/**
 	 *
 	 * @return org.eclipse.core.runtime.IPath
 	 * @param id java.lang.String
 	 */
 	protected IPath getUserSoundPath(String id) {
 		try {
 			IPath path = userSoundMap.get(id);
 			if (path != null)
 				return path;
 		} catch (Exception e) {
 			// ignore
 		}
 		return null;
 	}

 	/**
 	 * Initializes this preference page for the given workbench.
 	 * <p>
 	 * This method is called automatically as the preference page is being created
 	 * and initialized. Clients must not call this method.
 	 * </p>
 	 *
 	 * @param workbench the workbench
 	 */
 	public void init(IWorkbench workbench) {
 		// do nothing
 	}

 	/**
 	 *
 	 */
 	protected void loadUserMapInfo() {
 		// create a copy of the user sound map
 		Map<String, IPath> map = AudioCore.getInstance().getUserSoundMap();
 		userSoundMap = new HashMap<String, IPath>(map.size());

 		Iterator iterator = map.keySet().iterator();
 		while (iterator.hasNext()) {
 			String id = (String) iterator.next();
 			IPath path = map.get(id);
 			userSoundMap.put(id, path);
 		}
 	}

 	/**
 	 * @see PreferencePage#performDefaults()
 	 */
 	protected void performDefaults() {
 		AudioCore core = AudioCore.getInstance();

 		enableButton.setSelection(core.getDefaultSoundsEnabled());
 		volume.setSelection(core.getDefaultVolume());

 		userSoundMap = new HashMap<String, IPath>();
 		viewer.refresh();

 		super.performDefaults();
 	}

 	/**
 	 * @see PreferencePage#performOk()
 	 */
 	public boolean performOk() {
 		AudioCore core = AudioCore.getInstance();
 		core.setSoundsEnabled(enableButton.getSelection());
 		core.setVolume(volume.getSelection());

 		core.setUserSoundMap(userSoundMap);
 		viewer.refresh();

 		return super.performOk();
 	}

 	/**
 	 *
 	 */
 	protected void removeUserSoundPath(String id) {
 		if (userSoundMap.containsKey(id))
 			userSoundMap.remove(id);
 	}

 	/**
 	 *
 	 */
 	protected void saveUserMapInfo() {
 		// create a copy of the user sound map
 		Map map = AudioCore.getInstance().getUserSoundMap();
 		userSoundMap = new HashMap<String, IPath>(map.size());

 		Iterator iterator = map.keySet().iterator();
 		while (iterator.hasNext()) {
 			String id = (String) iterator.next();
 			IPath path = (IPath) map.get(id);
 			userSoundMap.put(id, path);
 		}
 	}

 	/**
 	 *
 	 * @param path org.eclipse.core.runtime.IPath
 	 */
 	protected void setUserSoundPath(String id, IPath path) {
 		userSoundMap.put(id, path);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2003, 2011 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.wst.server.ui.internal.audio;

	import java.net.URL;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.Map;
	import java.util.HashMap;
	import java.util.Iterator;

	import org.eclipse.core.runtime.*;
	import org.eclipse.swt.events.*;
	import org.eclipse.jface.viewers.*;
	import org.eclipse.swt.layout.*;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.widgets.*;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.preference.PreferencePage;
	import org.eclipse.ui.IWorkbenchPreferencePage;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.help.IWorkbenchHelpSystem;
	import org.eclipse.wst.server.ui.internal.ContextIds;
	import org.eclipse.wst.server.ui.internal.Messages;
	import org.eclipse.wst.server.ui.internal.SWTUtil;
	import org.eclipse.wst.server.ui.internal.Trace;
	/**
	* Audio preference page.
	*/
	public class AudioPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {
	protected Button enableButton;
	protected Spinner volume;

	protected Map<String, IPath> userSoundMap;

	protected CategoryTableViewer viewer;

	boolean soundAvailable = true;

	/**
	* AudioPreferencePage constructor comment.
	*/
	public AudioPreferencePage() {
	super();

	loadUserMapInfo();
	}

	protected IPath chooseAudioFile() {
	FileDialog dialog = new FileDialog(getShell(), SWT.SINGLE);
	dialog.setText(Messages.audioPrefSelectFile);
	dialog.setFilterExtensions(new String[] {".au;.wav"});
	dialog.setFilterPath(null);
	dialog.open();

	String[] filenames = dialog.getFileNames();
	if (filenames != null && filenames.length > 0) {
	String filterPath = dialog.getFilterPath();
	return new Path(filterPath + java.io.File.separator + filenames[0]);
	}
	return null;
	}

	/**
	* Creates and returns the SWT control for the customized body
	* of this preference page under the given parent composite.
	* <p>
	* This framework method must be implemented by concrete
	* subclasses.
	* </p>
	*
	* @param parent the parent composite
	* @return the new control
	*/
	protected Control createContents(Composite parent) {
	initializeDialogUnits(parent);
	IWorkbenchHelpSystem whs = PlatformUI.getWorkbench().getHelpSystem();
	whs.setHelp(parent, ContextIds.AUDIO_PREFERENCES);

	final AudioCore core = AudioCore.getInstance();

	Composite composite = new Composite(parent, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = 3;
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(4);
	layout.verticalSpacing = convertVerticalDLUsToPixels(3);
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	composite.setLayout(layout);
	GridData data = new GridData(GridData.FILL_HORIZONTAL \| GridData.VERTICAL_ALIGN_FILL);
	composite.setLayoutData(data);

	enableButton = new Button(composite, SWT.CHECK);
	enableButton.setText(Messages.audioPrefEnable);
	enableButton.setSelection(AudioCore.getInstance().isSoundEnabled());
	data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	data.horizontalSpan = 3;
	enableButton.setLayoutData(data);
	whs.setHelp(enableButton, ContextIds.AUDIO_PREFERENCES_ENABLE);

	final Label volumeLabel = new Label(composite, SWT.NONE);
	volumeLabel.setText(Messages.audioPrefVolume);
	data = new GridData();
	data.horizontalIndent = 20;
	volumeLabel.setLayoutData(data);
	volumeLabel.setEnabled(enableButton.getSelection());

	volume = new Spinner(composite, SWT.BORDER);
	volume.setMinimum(0);
	volume.setMaximum(20);
	volume.setSelection(AudioCore.getInstance().getVolume());
	data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
	data.horizontalSpan = 2;
	data.widthHint = 60;
	volume.setLayoutData(data);
	volume.setEnabled(enableButton.getSelection());
	whs.setHelp(volume, ContextIds.AUDIO_PREFERENCES_VOLUME);

	enableButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	volumeLabel.setEnabled(enableButton.getSelection());
	volume.setEnabled(enableButton.getSelection());
	}
	});

	Label label = new Label(composite, SWT.NONE);
	data = new GridData();
	data.horizontalSpan = 3;
	label.setLayoutData(data);

	label = new Label(composite, SWT.NONE);
	label.setText(Messages.audioPrefSounds);
	data = new GridData();
	data.horizontalSpan = 3;
	label.setLayoutData(data);

	final Table table = new Table(composite, SWT.BORDER \| SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.SINGLE \| SWT.FULL_SELECTION \| SWT.CHECK);
	data = new GridData(GridData.FILL_BOTH);
	data.horizontalSpan = 2;
	table.setLayoutData(data);
	whs.setHelp(table, ContextIds.AUDIO_PREFERENCES_SOUNDS_TABLE);

	viewer = new CategoryTableViewer(table);

	TableLayout tableLayout = new TableLayout();
	table.setLayout(tableLayout);
	table.setHeaderVisible(true);

	tableLayout.addColumnData(new ColumnPixelData(23, false));
	TableColumn col = new TableColumn(table, SWT.CENTER, 0);
	col.setResizable(false);

	tableLayout.addColumnData(new ColumnWeightData(11, 110, true));
	col = new TableColumn(table, SWT.NONE, 1);
	col.setText(Messages.audioPrefSound);
	col.setResizable(true);

	tableLayout.addColumnData(new ColumnWeightData(15, 150, true));
	col = new TableColumn(table, SWT.NONE, 2);
	col.setText(Messages.audioPrefFile);
	col.setResizable(true);

	viewer.setContentProvider(new AudioTableContentProvider());
	viewer.setLabelProvider(new AudioTableLabelProvider(this));
	viewer.setInput("root");

	setCheckState(viewer);

	viewer.addCheckStateListener(new ICheckStateListener() {
	public void checkStateChanged(CheckStateChangedEvent event) {
	boolean checked = event.getChecked();
	Object obj = event.getElement();

	if (obj instanceof String) {
	String id = (String) obj;
	core.setCategoryEnabled(id, checked);
	//viewer.refresh();
	Iterator iterator = AudioTableContentProvider.getSoundsByCategory(id).iterator();
	while (iterator.hasNext()) {
	Sound s = (Sound) iterator.next();
	viewer.setChecked(s, checked);
	core.setSoundEnabled(s.getId(), checked);
	}
	} else {
	Sound sound = (Sound) obj;
	core.setSoundEnabled(sound.getId(), checked);
	}
	}
	});

	Composite right = new Composite(composite, SWT.NONE);
	layout = new GridLayout();
	layout.numColumns = 1;
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(4);
	layout.verticalSpacing = convertVerticalDLUsToPixels(4);
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	right.setLayout(layout);
	data = new GridData(GridData.HORIZONTAL_ALIGN_END \| GridData.VERTICAL_ALIGN_FILL);
	right.setLayoutData(data);

	// play button and table selection listener
	final Button playButton = SWTUtil.createButton(right, Messages.audioPrefPlay);
	playButton.setEnabled(false);
	whs.setHelp(playButton, ContextIds.AUDIO_PREFERENCES_PLAY);

	final Button browseButton = SWTUtil.createButton(right, Messages.audioPrefBrowse);
	browseButton.setEnabled(false);
	whs.setHelp(browseButton, ContextIds.AUDIO_PREFERENCES_BROWSE);

	final Button resetButton = SWTUtil.createButton(right, Messages.audioPrefReset);
	resetButton.setEnabled(false);
	whs.setHelp(resetButton, ContextIds.AUDIO_PREFERENCES_RESET);

	viewer.addSelectionChangedListener(new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent event) {
	try {
	IStructuredSelection sel = (IStructuredSelection) event.getSelection();
	Object obj = sel.getFirstElement();
	if (obj instanceof Sound) {
	Sound sound = (Sound) obj;
	URL url = getSoundURL(sound.getId());
	if (url != null && soundAvailable)
	playButton.setEnabled(true);
	else
	playButton.setEnabled(false);
	browseButton.setEnabled(true);

	if (getUserSoundPath(sound.getId()) != null)
	resetButton.setEnabled(true);
	else
	resetButton.setEnabled(false);
	} else {
	playButton.setEnabled(false);
	browseButton.setEnabled(false);
	resetButton.setEnabled(false);
	}
	} catch (Exception ex) {
	if (Trace.SEVERE) {
	Trace.trace(Trace.STRING_SEVERE, "Error in table selection", ex);
	}
	}
	}
	});

	soundAvailable = AudioCore.isAudioSupported();
	if (soundAvailable) {
	playButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	try {
	int sel = table.getSelectionIndex();
	Sound sound = (Sound) table.getItem(sel).getData();
	AudioCore.playSound(getSoundURL(sound.getId()), volume.getSelection());
	} catch (Exception ex) {
	if (Trace.SEVERE) {
	Trace.trace(Trace.STRING_SEVERE, "Error in table selection", ex);
	}
	}
	}
	});
	} else
	playButton.setEnabled(false);

	browseButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	try {
	IPath path = chooseAudioFile();
	if (path != null) {
	int sel = table.getSelectionIndex();
	Sound sound = (Sound) table.getItem(sel).getData();
	setUserSoundPath(sound.getId(), path);
	viewer.refresh(sound);
	playButton.setEnabled(true);
	}
	} catch (Exception ex) {
	if (Trace.SEVERE) {
	Trace.trace(Trace.STRING_SEVERE, "Error browsing", ex);
	}
	}
	}
	});

	resetButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	try {
	int sel = table.getSelectionIndex();
	Sound sound = (Sound) table.getItem(sel).getData();
	removeUserSoundPath(sound.getId());
	viewer.refresh(sound);
	//playButton.setEnabled(true);
	} catch (Exception ex) {
	if (Trace.SEVERE) {
	Trace.trace(Trace.STRING_SEVERE, "Error reseting sound", ex);
	}
	}
	}
	});

	Dialog.applyDialogFont(composite);

	return composite;
	}

	protected void setCheckState(CheckboxTableViewer viewer) {
	AudioCore core = AudioCore.getInstance();

	Map<String, String> categories = core.getCategories();

	// first, find all the categories and sort
	List<String> cats = new ArrayList<String>();
	Iterator iterator = categories.keySet().iterator();
	while (iterator.hasNext())
	cats.add((String)iterator.next());

	// list them, ignoring empty ones
	iterator = categories.keySet().iterator();
	while (iterator.hasNext()) {
	String id = (String) iterator.next();
	List l = AudioTableContentProvider.getSoundsByCategory(id);
	if (!l.isEmpty()) {
	if (core.isCategoryEnabled(id))
	viewer.setChecked(id, true);

	int size = l.size();
	for (int i = 0; i < size; i++) {
	Sound s = (Sound) l.get(i);
	if (core.isSoundEnabled(s.getId()))
	viewer.setChecked(s, true);
	}
	}
	}

	// finally, list the "misc" sounds
	List l = AudioTableContentProvider.getSoundsByCategory(null);
	if (!l.isEmpty()) {
	int size = l.size();
	for (int i = 0; i < size; i++) {
	Sound s = (Sound) l.get(i);
	if (core.isSoundEnabled(s.getId()))
	viewer.setChecked(s, true);
	}
	}
	}

	/**
	*
	* @return org.eclipse.core.runtime.IPath
	* @param id java.lang.String
	*/
	protected URL getSoundURL(String id) {
	try {
	IPath path = userSoundMap.get(id);
	if (path != null)
	return path.toFile().toURL();
	} catch (Exception e) {
	// ignore
	}

	return AudioCore.getInstance().getSound(id).getLocation();
	}

	/**
	*
	* @return org.eclipse.core.runtime.IPath
	* @param id java.lang.String
	*/
	protected IPath getUserSoundPath(String id) {
	try {
	IPath path = userSoundMap.get(id);
	if (path != null)
	return path;
	} catch (Exception e) {
	// ignore
	}
	return null;
	}

	/**
	* Initializes this preference page for the given workbench.
	* <p>
	* This method is called automatically as the preference page is being created
	* and initialized. Clients must not call this method.
	* </p>
	*
	* @param workbench the workbench
	*/
	public void init(IWorkbench workbench) {
	// do nothing
	}

	/**
	*
	*/
	protected void loadUserMapInfo() {
	// create a copy of the user sound map
	Map<String, IPath> map = AudioCore.getInstance().getUserSoundMap();
	userSoundMap = new HashMap<String, IPath>(map.size());

	Iterator iterator = map.keySet().iterator();
	while (iterator.hasNext()) {
	String id = (String) iterator.next();
	IPath path = map.get(id);
	userSoundMap.put(id, path);
	}
	}

	/**
	* @see PreferencePage#performDefaults()
	*/
	protected void performDefaults() {
	AudioCore core = AudioCore.getInstance();

	enableButton.setSelection(core.getDefaultSoundsEnabled());
	volume.setSelection(core.getDefaultVolume());

	userSoundMap = new HashMap<String, IPath>();
	viewer.refresh();

	super.performDefaults();
	}

	/**
	* @see PreferencePage#performOk()
	*/
	public boolean performOk() {
	AudioCore core = AudioCore.getInstance();
	core.setSoundsEnabled(enableButton.getSelection());
	core.setVolume(volume.getSelection());

	core.setUserSoundMap(userSoundMap);
	viewer.refresh();

	return super.performOk();
	}

	/**
	*
	*/
	protected void removeUserSoundPath(String id) {
	if (userSoundMap.containsKey(id))
	userSoundMap.remove(id);
	}

	/**
	*
	*/
	protected void saveUserMapInfo() {
	// create a copy of the user sound map
	Map map = AudioCore.getInstance().getUserSoundMap();
	userSoundMap = new HashMap<String, IPath>(map.size());

	Iterator iterator = map.keySet().iterator();
	while (iterator.hasNext()) {
	String id = (String) iterator.next();
	IPath path = (IPath) map.get(id);
	userSoundMap.put(id, path);
	}
	}

	/**
	*
	* @param path org.eclipse.core.runtime.IPath
	*/
	protected void setUserSoundPath(String id, IPath path) {
	userSoundMap.put(id, path);
	}
	}