ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/product/ConfigurationSection.java - pde/eclipse.pde.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2016 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
  *     Martin Karpisek <martin.karpisek@gmail.com> - Bug 438509
  *******************************************************************************/
 package org.eclipse.pde.internal.ui.editor.product;

 import org.eclipse.core.resources.*;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.equinox.bidi.StructuredTextTypeHandlerFactory;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.util.BidiUtils;
 import org.eclipse.jface.window.Window;
 import org.eclipse.pde.core.IModelChangedEvent;
 import org.eclipse.pde.core.plugin.TargetPlatform;
 import org.eclipse.pde.internal.core.iproduct.*;
 import org.eclipse.pde.internal.ui.*;
 import org.eclipse.pde.internal.ui.editor.*;
 import org.eclipse.pde.internal.ui.parts.FormEntry;
 import org.eclipse.pde.internal.ui.util.FileNameFilter;
 import org.eclipse.pde.internal.ui.util.FileValidator;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.CTabFolder;
 import org.eclipse.swt.custom.CTabItem;
 import org.eclipse.swt.dnd.Clipboard;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.ui.IActionBars;
 import org.eclipse.ui.PartInitException;
 import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
 import org.eclipse.ui.forms.IFormColors;
 import org.eclipse.ui.forms.events.HyperlinkEvent;
 import org.eclipse.ui.forms.widgets.FormToolkit;
 import org.eclipse.ui.forms.widgets.Section;
 import org.eclipse.ui.ide.IDE;
 import org.eclipse.ui.model.WorkbenchContentProvider;
 import org.eclipse.ui.model.WorkbenchLabelProvider;

 public class ConfigurationSection extends PDESection {

 	private Button fDefault;
 	private Button fCustom;
 	private FormEntry fCustomEntry;
 	private boolean fBlockChanges;

 	private static final String[] TAB_LABELS = { "linux", "macosx", "win32" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
 	private static final String[] TAB_OS = { Platform.OS_LINUX, Platform.OS_MACOSX, Platform.OS_WIN32 };

 	private CTabFolder fTabFolder;
 	private int fLastTab;

 	public ConfigurationSection(PDEFormPage page, Composite parent) {
 		super(page, parent, Section.DESCRIPTION);
 		createClient(getSection(), page.getEditor().getToolkit());
 	}

 	@Override
 	protected void createClient(Section section, FormToolkit toolkit) {

 		section.setLayout(FormLayoutFactory.createClearGridLayout(false, 1));
 		GridData sectionData = new GridData(GridData.FILL_HORIZONTAL);
 		section.setLayoutData(sectionData);

 		section.setText(PDEUIMessages.ConfigurationSection_title);
 		section.setDescription(PDEUIMessages.ConfigurationSection_desc);

 		Composite client = toolkit.createComposite(section);
 		client.setLayout(FormLayoutFactory.createSectionClientGridLayout(false, 3));
 		client.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		fTabFolder = new CTabFolder(client, SWT.FLAT | SWT.TOP);
 		toolkit.adapt(fTabFolder, true, true);
 		GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		fTabFolder.setLayoutData(gd);
 		gd.heightHint = 2;
 		gd.horizontalSpan = 3;
 		gd.grabExcessHorizontalSpace = true;
 		toolkit.getColors().initializeSectionToolBarColors();
 		Color selectedColor = toolkit.getColors().getColor(IFormColors.TB_BG);
 		fTabFolder.setSelectionBackground(new Color[] {selectedColor, toolkit.getColors().getBackground()}, new int[] {100}, true);

 		fTabFolder.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				if (fCustomEntry.isDirty())
 					fCustomEntry.commit();
 				refresh();
 			}
 		});
 		fTabFolder.setUnselectedImageVisible(false);

 		fDefault = toolkit.createButton(client, PDEUIMessages.ConfigurationSection_default, SWT.RADIO);
 		gd = new GridData();
 		gd.horizontalSpan = 3;
 		fDefault.setLayoutData(gd);
 		fDefault.setEnabled(isEditable());
 		fDefault.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				if (!fBlockChanges) {
 					boolean selected = fDefault.getSelection();
 					IConfigurationFileInfo info = getConfigurationFileInfo();
 					String os = getOS(fLastTab);
 					info.setUse(os, selected ? "default" : "custom"); //$NON-NLS-1$ //$NON-NLS-2$
 					info.setPath(os, selected == true ? null : fCustomEntry.getValue());
 					fCustomEntry.setValue(selected == true ? null : fCustomEntry.getValue(), true);
 					fCustomEntry.setEditable(!selected);
 				}
 			}
 		});

 		fCustom = toolkit.createButton(client, PDEUIMessages.ConfigurationSection_existing, SWT.RADIO);
 		gd = new GridData();
 		gd.horizontalSpan = 3;
 		fCustom.setLayoutData(gd);
 		fCustom.setEnabled(isEditable());

 		IActionBars actionBars = getPage().getPDEEditor().getEditorSite().getActionBars();
 		fCustomEntry = new FormEntry(client, toolkit, PDEUIMessages.ConfigurationSection_file, PDEUIMessages.ConfigurationSection_browse, isEditable(), 35); //
 		BidiUtils.applyBidiProcessing(fCustomEntry.getText(), StructuredTextTypeHandlerFactory.FILE);
 		fCustomEntry.setFormEntryListener(new FormEntryAdapter(this, actionBars) {
 			@Override
 			public void textValueChanged(FormEntry entry) {
 				if (!fBlockChanges) {
 					IConfigurationFileInfo info = getConfigurationFileInfo();
 					String os = getOS(fLastTab);
 					info.setUse(os, "custom"); //$NON-NLS-1$
 					info.setPath(os, entry.getValue());
 				}
 			}

 			@Override
 			public void browseButtonSelected(FormEntry entry) {
 				handleBrowse();
 			}

 			@Override
 			public void linkActivated(HyperlinkEvent e) {
 				handleOpen();
 			}
 		});
 		fCustomEntry.setEditable(isEditable());

 		createTabs();
 		toolkit.paintBordersFor(client);
 		section.setClient(client);
 		// Register to be notified when the model changes
 		getModel().addModelChangedListener(this);
 	}

 	@Override
 	public void dispose() {
 		IProductModel model = getModel();
 		if (model != null) {
 			model.removeModelChangedListener(this);
 		}
 		super.dispose();
 	}

 	private void handleBrowse() {
 		ElementTreeSelectionDialog dialog = new ElementTreeSelectionDialog(getSection().getShell(), new WorkbenchLabelProvider(), new WorkbenchContentProvider());

 		dialog.setValidator(new FileValidator());
 		dialog.setAllowMultiple(false);
 		dialog.setTitle(PDEUIMessages.ConfigurationSection_selection);
 		dialog.setMessage(PDEUIMessages.ConfigurationSection_message);
 		dialog.addFilter(new FileNameFilter("config.ini")); //$NON-NLS-1$
 		dialog.setInput(PDEPlugin.getWorkspace().getRoot());

 		if (dialog.open() == Window.OK) {
 			IFile file = (IFile) dialog.getFirstResult();
 			fCustomEntry.setValue(file.getFullPath().toString());
 		}
 	}

 	@Override
 	public void refresh() {
 		fBlockChanges = true;
 		fLastTab = fTabFolder.getSelectionIndex();
 		IConfigurationFileInfo info = getConfigurationFileInfo();
 		String os = getOS(fLastTab);
 		fDefault.setEnabled(isEditable());
 		if (info == null) {
 			fDefault.setSelection(true);
 			fCustomEntry.setEditable(false);
 		} else {
 			boolean custom = "custom".equals(info.getUse(os)); //$NON-NLS-1$
 			fDefault.setSelection(!custom);
 			fCustom.setSelection(custom);
 			fCustomEntry.setValue(custom == true ? info.getPath(os) : null, true);
 			fCustomEntry.setEditable(isEditable() && custom);
 		}
 		super.refresh();
 		fBlockChanges = false;
 	}

 	private IConfigurationFileInfo getConfigurationFileInfo() {
 		IConfigurationFileInfo info = getProduct().getConfigurationFileInfo();
 		if (info == null) {
 			info = getModel().getFactory().createConfigFileInfo();
 			getProduct().setConfigurationFileInfo(info);
 		}
 		return info;
 	}

 	private IProduct getProduct() {
 		return getModel().getProduct();
 	}

 	private IProductModel getModel() {
 		return (IProductModel) getPage().getPDEEditor().getAggregateModel();
 	}

 	@Override
 	public void commit(boolean onSave) {
 		fCustomEntry.commit();
 		super.commit(onSave);
 	}

 	@Override
 	public void cancelEdit() {
 		fCustomEntry.cancelEdit();
 		super.cancelEdit();
 	}

 	@Override
 	public boolean canPaste(Clipboard clipboard) {
 		Display d = getSection().getDisplay();
 		Control c = d.getFocusControl();
 		if (c instanceof Text)
 			return true;
 		return false;
 	}

 	private void handleOpen() {
 		IWorkspaceRoot root = PDEPlugin.getWorkspace().getRoot();
 		Path path = new Path(fCustomEntry.getValue());
 		if (path.isEmpty()) {
 			MessageDialog.openWarning(PDEPlugin.getActiveWorkbenchShell(), PDEUIMessages.WindowImagesSection_open, PDEUIMessages.WindowImagesSection_emptyPath); //
 			return;
 		}
 		IResource resource = root.findMember(path);
 		try {
 			if (resource != null && resource instanceof IFile)
 				IDE.openEditor(PDEPlugin.getActivePage(), (IFile) resource, true);
 			else
 				MessageDialog.openWarning(PDEPlugin.getActiveWorkbenchShell(), PDEUIMessages.WindowImagesSection_open, PDEUIMessages.WindowImagesSection_warning); //
 		} catch (PartInitException e) {
 		}
 	}

 	@Override
 	public void modelChanged(IModelChangedEvent e) {
 		// No need to call super, handling world changed event here
 		if (e.getChangeType() == IModelChangedEvent.WORLD_CHANGED) {
 			handleModelEventWorldChanged(e);
 		}
 	}

 	/**
 	 * @param event
 	 */
 	private void handleModelEventWorldChanged(IModelChangedEvent event) {
 		// This section can get disposed if the configuration is changed from
 		// plugins to features or vice versa.  Subsequently, the configuration
 		// page is removed and readded.  In this circumstance, abort the
 		// refresh
 		if (fCustomEntry.getText().isDisposed()) {
 			return;
 		}
 		// Perform the refresh
 		refresh();
 		// Note:  A deferred selection event is fired from radio buttons when
 		// their value is toggled, the user switches to another page, and the
 		// user switches back to the same page containing the radio buttons
 		// This appears to be a result of a SWT bug.
 		// If the radio button is the last widget to have focus when leaving
 		// the page, an event will be fired when entering the page again.
 		// An event is not fired if the radio button does not have focus.
 		// The solution is to redirect focus to a stable widget.
 		getPage().setLastFocusControl(fCustomEntry.getText());
 	}

 	private void createTabs() {
 		for (int i = 0; i < TAB_LABELS.length; i++) {
 			CTabItem item = new CTabItem(fTabFolder, SWT.NULL);
 			item.setText(TAB_LABELS[i]);
 			item.setImage(PDEPlugin.getDefault().getLabelProvider().get(PDEPluginImages.DESC_OPERATING_SYSTEM_OBJ));
 		}
 		fLastTab = 0;
 		fTabFolder.setSelection(fLastTab);

 		String currentTarget = TargetPlatform.getOS();

 		if (Platform.OS_WIN32.equals(currentTarget)) {
 			fTabFolder.setSelection(2);
 		} else if (Platform.OS_MACOSX.equals(currentTarget)) {
 			fTabFolder.setSelection(1);
 		}
 	}

 	private String getOS(int tab) {
 		if (tab >= 0 && tab < TAB_OS.length) {
 			return TAB_OS[tab];
 		}
 		return null;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2005, 2016 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
	* Martin Karpisek <martin.karpisek@gmail.com> - Bug 438509
	*******************************************************************************/
	package org.eclipse.pde.internal.ui.editor.product;

	import org.eclipse.core.resources.*;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.equinox.bidi.StructuredTextTypeHandlerFactory;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.util.BidiUtils;
	import org.eclipse.jface.window.Window;
	import org.eclipse.pde.core.IModelChangedEvent;
	import org.eclipse.pde.core.plugin.TargetPlatform;
	import org.eclipse.pde.internal.core.iproduct.*;
	import org.eclipse.pde.internal.ui.*;
	import org.eclipse.pde.internal.ui.editor.*;
	import org.eclipse.pde.internal.ui.parts.FormEntry;
	import org.eclipse.pde.internal.ui.util.FileNameFilter;
	import org.eclipse.pde.internal.ui.util.FileValidator;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.CTabFolder;
	import org.eclipse.swt.custom.CTabItem;
	import org.eclipse.swt.dnd.Clipboard;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.widgets.*;
	import org.eclipse.ui.IActionBars;
	import org.eclipse.ui.PartInitException;
	import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
	import org.eclipse.ui.forms.IFormColors;
	import org.eclipse.ui.forms.events.HyperlinkEvent;
	import org.eclipse.ui.forms.widgets.FormToolkit;
	import org.eclipse.ui.forms.widgets.Section;
	import org.eclipse.ui.ide.IDE;
	import org.eclipse.ui.model.WorkbenchContentProvider;
	import org.eclipse.ui.model.WorkbenchLabelProvider;

	public class ConfigurationSection extends PDESection {

	private Button fDefault;
	private Button fCustom;
	private FormEntry fCustomEntry;
	private boolean fBlockChanges;

	private static final String[] TAB_LABELS = { "linux", "macosx", "win32" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	private static final String[] TAB_OS = { Platform.OS_LINUX, Platform.OS_MACOSX, Platform.OS_WIN32 };

	private CTabFolder fTabFolder;
	private int fLastTab;

	public ConfigurationSection(PDEFormPage page, Composite parent) {
	super(page, parent, Section.DESCRIPTION);
	createClient(getSection(), page.getEditor().getToolkit());
	}

	@Override
	protected void createClient(Section section, FormToolkit toolkit) {

	section.setLayout(FormLayoutFactory.createClearGridLayout(false, 1));
	GridData sectionData = new GridData(GridData.FILL_HORIZONTAL);
	section.setLayoutData(sectionData);

	section.setText(PDEUIMessages.ConfigurationSection_title);
	section.setDescription(PDEUIMessages.ConfigurationSection_desc);

	Composite client = toolkit.createComposite(section);
	client.setLayout(FormLayoutFactory.createSectionClientGridLayout(false, 3));
	client.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	fTabFolder = new CTabFolder(client, SWT.FLAT \| SWT.TOP);
	toolkit.adapt(fTabFolder, true, true);
	GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	fTabFolder.setLayoutData(gd);
	gd.heightHint = 2;
	gd.horizontalSpan = 3;
	gd.grabExcessHorizontalSpace = true;
	toolkit.getColors().initializeSectionToolBarColors();
	Color selectedColor = toolkit.getColors().getColor(IFormColors.TB_BG);
	fTabFolder.setSelectionBackground(new Color[] {selectedColor, toolkit.getColors().getBackground()}, new int[] {100}, true);

	fTabFolder.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	if (fCustomEntry.isDirty())
	fCustomEntry.commit();
	refresh();
	}
	});
	fTabFolder.setUnselectedImageVisible(false);

	fDefault = toolkit.createButton(client, PDEUIMessages.ConfigurationSection_default, SWT.RADIO);
	gd = new GridData();
	gd.horizontalSpan = 3;
	fDefault.setLayoutData(gd);
	fDefault.setEnabled(isEditable());
	fDefault.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	if (!fBlockChanges) {
	boolean selected = fDefault.getSelection();
	IConfigurationFileInfo info = getConfigurationFileInfo();
	String os = getOS(fLastTab);
	info.setUse(os, selected ? "default" : "custom"); //$NON-NLS-1$ //$NON-NLS-2$
	info.setPath(os, selected == true ? null : fCustomEntry.getValue());
	fCustomEntry.setValue(selected == true ? null : fCustomEntry.getValue(), true);
	fCustomEntry.setEditable(!selected);
	}
	}
	});

	fCustom = toolkit.createButton(client, PDEUIMessages.ConfigurationSection_existing, SWT.RADIO);
	gd = new GridData();
	gd.horizontalSpan = 3;
	fCustom.setLayoutData(gd);
	fCustom.setEnabled(isEditable());

	IActionBars actionBars = getPage().getPDEEditor().getEditorSite().getActionBars();
	fCustomEntry = new FormEntry(client, toolkit, PDEUIMessages.ConfigurationSection_file, PDEUIMessages.ConfigurationSection_browse, isEditable(), 35); //
	BidiUtils.applyBidiProcessing(fCustomEntry.getText(), StructuredTextTypeHandlerFactory.FILE);
	fCustomEntry.setFormEntryListener(new FormEntryAdapter(this, actionBars) {
	@Override
	public void textValueChanged(FormEntry entry) {
	if (!fBlockChanges) {
	IConfigurationFileInfo info = getConfigurationFileInfo();
	String os = getOS(fLastTab);
	info.setUse(os, "custom"); //$NON-NLS-1$
	info.setPath(os, entry.getValue());
	}
	}

	@Override
	public void browseButtonSelected(FormEntry entry) {
	handleBrowse();
	}

	@Override
	public void linkActivated(HyperlinkEvent e) {
	handleOpen();
	}
	});
	fCustomEntry.setEditable(isEditable());

	createTabs();
	toolkit.paintBordersFor(client);
	section.setClient(client);
	// Register to be notified when the model changes
	getModel().addModelChangedListener(this);
	}

	@Override
	public void dispose() {
	IProductModel model = getModel();
	if (model != null) {
	model.removeModelChangedListener(this);
	}
	super.dispose();
	}

	private void handleBrowse() {
	ElementTreeSelectionDialog dialog = new ElementTreeSelectionDialog(getSection().getShell(), new WorkbenchLabelProvider(), new WorkbenchContentProvider());

	dialog.setValidator(new FileValidator());
	dialog.setAllowMultiple(false);
	dialog.setTitle(PDEUIMessages.ConfigurationSection_selection);
	dialog.setMessage(PDEUIMessages.ConfigurationSection_message);
	dialog.addFilter(new FileNameFilter("config.ini")); //$NON-NLS-1$
	dialog.setInput(PDEPlugin.getWorkspace().getRoot());

	if (dialog.open() == Window.OK) {
	IFile file = (IFile) dialog.getFirstResult();
	fCustomEntry.setValue(file.getFullPath().toString());
	}
	}

	@Override
	public void refresh() {
	fBlockChanges = true;
	fLastTab = fTabFolder.getSelectionIndex();
	IConfigurationFileInfo info = getConfigurationFileInfo();
	String os = getOS(fLastTab);
	fDefault.setEnabled(isEditable());
	if (info == null) {
	fDefault.setSelection(true);
	fCustomEntry.setEditable(false);
	} else {
	boolean custom = "custom".equals(info.getUse(os)); //$NON-NLS-1$
	fDefault.setSelection(!custom);
	fCustom.setSelection(custom);
	fCustomEntry.setValue(custom == true ? info.getPath(os) : null, true);
	fCustomEntry.setEditable(isEditable() && custom);
	}
	super.refresh();
	fBlockChanges = false;
	}

	private IConfigurationFileInfo getConfigurationFileInfo() {
	IConfigurationFileInfo info = getProduct().getConfigurationFileInfo();
	if (info == null) {
	info = getModel().getFactory().createConfigFileInfo();
	getProduct().setConfigurationFileInfo(info);
	}
	return info;
	}

	private IProduct getProduct() {
	return getModel().getProduct();
	}

	private IProductModel getModel() {
	return (IProductModel) getPage().getPDEEditor().getAggregateModel();
	}

	@Override
	public void commit(boolean onSave) {
	fCustomEntry.commit();
	super.commit(onSave);
	}

	@Override
	public void cancelEdit() {
	fCustomEntry.cancelEdit();
	super.cancelEdit();
	}

	@Override
	public boolean canPaste(Clipboard clipboard) {
	Display d = getSection().getDisplay();
	Control c = d.getFocusControl();
	if (c instanceof Text)
	return true;
	return false;
	}

	private void handleOpen() {
	IWorkspaceRoot root = PDEPlugin.getWorkspace().getRoot();
	Path path = new Path(fCustomEntry.getValue());
	if (path.isEmpty()) {
	MessageDialog.openWarning(PDEPlugin.getActiveWorkbenchShell(), PDEUIMessages.WindowImagesSection_open, PDEUIMessages.WindowImagesSection_emptyPath); //
	return;
	}
	IResource resource = root.findMember(path);
	try {
	if (resource != null && resource instanceof IFile)
	IDE.openEditor(PDEPlugin.getActivePage(), (IFile) resource, true);
	else
	MessageDialog.openWarning(PDEPlugin.getActiveWorkbenchShell(), PDEUIMessages.WindowImagesSection_open, PDEUIMessages.WindowImagesSection_warning); //
	} catch (PartInitException e) {
	}
	}

	@Override
	public void modelChanged(IModelChangedEvent e) {
	// No need to call super, handling world changed event here
	if (e.getChangeType() == IModelChangedEvent.WORLD_CHANGED) {
	handleModelEventWorldChanged(e);
	}
	}

	/**
	* @param event
	*/
	private void handleModelEventWorldChanged(IModelChangedEvent event) {
	// This section can get disposed if the configuration is changed from
	// plugins to features or vice versa. Subsequently, the configuration
	// page is removed and readded. In this circumstance, abort the
	// refresh
	if (fCustomEntry.getText().isDisposed()) {
	return;
	}
	// Perform the refresh
	refresh();
	// Note: A deferred selection event is fired from radio buttons when
	// their value is toggled, the user switches to another page, and the
	// user switches back to the same page containing the radio buttons
	// This appears to be a result of a SWT bug.
	// If the radio button is the last widget to have focus when leaving
	// the page, an event will be fired when entering the page again.
	// An event is not fired if the radio button does not have focus.
	// The solution is to redirect focus to a stable widget.
	getPage().setLastFocusControl(fCustomEntry.getText());
	}

	private void createTabs() {
	for (int i = 0; i < TAB_LABELS.length; i++) {
	CTabItem item = new CTabItem(fTabFolder, SWT.NULL);
	item.setText(TAB_LABELS[i]);
	item.setImage(PDEPlugin.getDefault().getLabelProvider().get(PDEPluginImages.DESC_OPERATING_SYSTEM_OBJ));
	}
	fLastTab = 0;
	fTabFolder.setSelection(fLastTab);

	String currentTarget = TargetPlatform.getOS();

	if (Platform.OS_WIN32.equals(currentTarget)) {
	fTabFolder.setSelection(2);
	} else if (Platform.OS_MACOSX.equals(currentTarget)) {
	fTabFolder.setSelection(1);
	}
	}

	private String getOS(int tab) {
	if (tab >= 0 && tab < TAB_OS.length) {
	return TAB_OS[tab];
	}
	return null;
	}

	}