bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/EditorSelectionDialog.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.internal.dialogs;

 import org.eclipse.ui.internal.registry.*;
 import org.eclipse.ui.*;
 import org.eclipse.ui.help.WorkbenchHelp;
 import org.eclipse.ui.internal.*;
 import org.eclipse.jface.dialogs.*;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;
 import java.util.*;


 /**
  * This class is used to allow the user to select a dialog from the set of
  * internal and external editors.
  *
  * @private
  *      This class is internal to the workbench and must not be called outside the workbench
 */

 public class EditorSelectionDialog extends Dialog implements Listener {
 	private EditorDescriptor selectedEditor;
 	private Button externalButton;
 	private Table editorTable;
 	private Button browseExternalEditorsButton;
 	private Button internalButton;
 	private Button okButton;
 	private static final String STORE_ID_INTERNAL_EXTERNAL = "EditorSelectionDialog.STORE_ID_INTERNAL_EXTERNAL";//$NON-NLS-1$
 	private String message = WorkbenchMessages.getString("EditorSelection.chooseAnEditor"); //$NON-NLS-1$
 	// collection of IEditorDescriptor
 	private IEditorDescriptor[] externalEditors;
 	private IEditorDescriptor[] internalEditors;
 	private Image[] externalEditorImages;
 	private Image[] internalEditorImages;
 	private IEditorDescriptor[] editorsToFilter;
 	private static final String [] Executable_Filters;
 	private static final int TABLE_WIDTH = 200;
 	static {
 		if(SWT.getPlatform().equals("win32")) {//$NON-NLS-1$
 			Executable_Filters = new String[] { "*.exe", "*.bat", "*.*"};//$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
 		} else {
 			Executable_Filters = new String[] {"*"};	//$NON-NLS-1$
 		}
 	}
 public EditorSelectionDialog(Shell parentShell) {
 	super(parentShell);
 }

 /**
  * This method is called if a button has been pressed.
  */
 protected void buttonPressed(int buttonId) {
 	if (buttonId == IDialogConstants.OK_ID)
 		saveWidgetValues();
 	super.buttonPressed(buttonId);
 }
 /**
  * Close the window.
  */
 public boolean close() {
 	if (internalEditorImages != null) {
 		for (int i = 0; i < internalEditorImages.length; i++) {
 			internalEditorImages[i].dispose();
 		}
 		internalEditorImages = null;
 	}
 	if (externalEditorImages != null) {
 		for (int i = 0; i < externalEditorImages.length; i++) {
 			externalEditorImages[i].dispose();
 		}
 		externalEditorImages = null;
 	}
 	return super.close();
 }
 /* (non-Javadoc)
  * Method declared in Window.
  */
 protected void configureShell(Shell shell) {
 	super.configureShell(shell);
 	shell.setText(WorkbenchMessages.getString("EditorSelection.title")); //$NON-NLS-1$
 	WorkbenchHelp.setHelp(shell, IHelpContextIds.EDITOR_SELECTION_DIALOG);
 }
 /**
  * Creates and returns the contents of the upper part
  * of the dialog (above the button bar).
  *
  * Subclasses should overide.
  *
  * @param the parent composite to contain the dialog area
  * @return the dialog area control
  */
 protected Control createDialogArea(Composite parent) {
 	Font font = parent.getFont();
 	// create main group
 	Composite contents = (Composite)super.createDialogArea(parent);
 	((GridLayout)contents.getLayout()).numColumns = 2;

 	// begin the layout
 	Label textLabel = new Label(contents,SWT.NONE);
 	textLabel.setText(message);
 	GridData data = new GridData();
 	data.horizontalSpan = 2;
 	textLabel.setLayoutData(data);
 	textLabel.setFont(font);

 	internalButton = new Button(contents, SWT.RADIO | SWT.LEFT);
 	internalButton.setText(WorkbenchMessages.getString("EditorSelection.internal")); //$NON-NLS-1$
 	internalButton.addListener(SWT.Selection, this);
 	data = new GridData();
 	data.horizontalSpan = 1;
 	internalButton.setLayoutData(data);
 	internalButton.setFont(font);

 	externalButton = new Button(contents, SWT.RADIO | SWT.LEFT);
 	externalButton.setText(WorkbenchMessages.getString("EditorSelection.external")); //$NON-NLS-1$
 	externalButton.addListener(SWT.Selection, this);
 	data = new GridData();
 	data.horizontalSpan = 1;
 	externalButton.setLayoutData(data);
 	externalButton.setFont(font);

 	editorTable = new Table(contents, SWT.SINGLE | SWT.BORDER);
 	editorTable.addListener(SWT.Selection, this);
 	editorTable.addListener(SWT.DefaultSelection, this);
 	editorTable.addListener(SWT.MouseDoubleClick, this);
 	data = new GridData();
 	data.widthHint = convertHorizontalDLUsToPixels(TABLE_WIDTH);
 	data.horizontalAlignment= GridData.FILL;
 	data.grabExcessHorizontalSpace= true;
 	data.verticalAlignment= GridData.FILL;
 	data.grabExcessVerticalSpace= true;
 	data.horizontalSpan = 2;
 	editorTable.setLayoutData(data);
 	editorTable.setFont(font);
 	data.heightHint = editorTable.getItemHeight()*12;

 	browseExternalEditorsButton = new Button(contents, SWT.PUSH);
 	browseExternalEditorsButton.setText(WorkbenchMessages.getString("EditorSelection.browse")); //$NON-NLS-1$
 	browseExternalEditorsButton.addListener(SWT.Selection, this);
 	data = new GridData();
 	data.heightHint = convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT);
 	int widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);
 	data.widthHint = Math.max(widthHint, browseExternalEditorsButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
 	browseExternalEditorsButton.setLayoutData(data);
 	browseExternalEditorsButton.setFont(font);

 	restoreWidgetValues();  // Place buttons to the appropriate state

 	fillEditorTable();

 	updateEnableState();

 	return contents;
 }
 protected void fillEditorTable() {
 	editorTable.removeAll();
 	editorTable.update();
 	IEditorDescriptor[] editors;
 	Image[] images;
 	if (internalButton.getSelection()) {
 		editors = getInternalEditors();
 		images = internalEditorImages;
 	} else {
 		editors = getExternalEditors();
 		images = externalEditorImages;
 	}

 	// 1FWHIEX: ITPUI:WINNT - Need to call setRedraw
 	editorTable.setRedraw(false);
 	for (int i = 0; i < editors.length; i++) {
 		TableItem item = new TableItem(editorTable, SWT.NULL);
 		item.setData(editors[i]);
 		item.setText(editors[i].getLabel());
 		item.setImage(images[i]);
 	}
 	editorTable.setRedraw(true);
 }
 /**
  * Return the dialog store to cache values into
  */

 protected IDialogSettings getDialogSettings() {
 	IDialogSettings workbenchSettings = WorkbenchPlugin.getDefault().getDialogSettings();
 	IDialogSettings section = workbenchSettings.getSection("EditorSelectionDialog");//$NON-NLS-1$
 	if(section == null)
 		section = workbenchSettings.addNewSection("EditorSelectionDialog");//$NON-NLS-1$
 	return section;
 }
 /**
  * Get a list of registered programs from the OS
  */
 protected IEditorDescriptor[] getExternalEditors() {
 	if (externalEditors == null) {
 		// Since this can take a while, show the busy
 		// cursor. If the dialog is not yet visible,
 		// then use the parent shell.
 		Control shell = getShell();
 		if (!shell.isVisible()) {
 			Control topShell = shell.getParent();
 			if (topShell != null)
 				shell = topShell;
 		}
 		Cursor busy = new Cursor(shell.getDisplay(), SWT.CURSOR_WAIT);
 		shell.setCursor(busy);
 		// Get the external editors available
 		EditorRegistry reg = (EditorRegistry)WorkbenchPlugin.getDefault().getEditorRegistry();
 		externalEditors = reg.getSortedEditorsFromOS();
 		externalEditors = filterEditors(externalEditors);
 		externalEditorImages = getImages(externalEditors);
 		// Clean up
 		shell.setCursor(null);
 		busy.dispose();
 	}
 	return externalEditors;
 }
 /**
  * Returns an array of editors which have been filtered according to
  * the array of editors in the editorsToFilter instance variable.
  *
  * @param editorsToFilter an array of editors to filter
  * @return a filtered array of editors
  */
 protected IEditorDescriptor[] filterEditors(IEditorDescriptor[] editors){
 	if ((editors == null) || (editors.length < 1))
 		return editors;

 	if ((editorsToFilter == null) || (editorsToFilter.length < 1))
 		return editors;

 	ArrayList filteredList = new ArrayList();
 	for (int i = 0; i < editors.length; i++) {
 		boolean add = true;
 		for (int j = 0; j < editorsToFilter.length; j++) {
 			if (editors[i].getId().equals(editorsToFilter[j].getId())) {
 				add = false;
 			}
 		}
 		if (add)
 			filteredList.add(editors[i]);
 	}

 	return (IEditorDescriptor[]) filteredList.toArray(new IEditorDescriptor[filteredList.size()]);
 }

 /**
  * Returns an array of images for the given array of editors
  */
 protected Image[] getImages(IEditorDescriptor[] editors) {
 	Image[] images = new Image[editors.length];
 	for (int i = 0; i < editors.length; i++) {
 		images[i] = editors[i].getImageDescriptor().createImage();
 	}
 	return images;
 }
 /**
  * Returns the internal editors
  */
 protected IEditorDescriptor[] getInternalEditors() {
 	if (internalEditors == null) {
 		EditorRegistry reg = (EditorRegistry)WorkbenchPlugin.getDefault().getEditorRegistry();
 		internalEditors = reg.getSortedEditorsFromPlugins();
 		internalEditors = filterEditors(internalEditors);
 		internalEditorImages = getImages(internalEditors);
 	}
 	return internalEditors;
 }
 /**
  * Return the editor the user selected
  */
 public IEditorDescriptor getSelectedEditor() {
 	return selectedEditor;
 }
 public void handleEvent(Event event) {
 	if (event.type == SWT.MouseDoubleClick){
 		handleDoubleClickEvent();
 		return;
 	}
 	if (event.widget == externalButton) {
 		fillEditorTable();
 	} else if (event.widget == browseExternalEditorsButton) {
 		promptForExternalEditor();
 	} else if (event.widget == editorTable) {
 		if (editorTable.getSelectionIndex() != -1){
 			selectedEditor = (EditorDescriptor)editorTable.getSelection()[0].getData();
 		} else {
 			selectedEditor = null;
 			okButton.setEnabled(false);
 		}
 	}
 	updateEnableState();
 }
 protected void promptForExternalEditor() {
 	FileDialog dialog = new FileDialog(getShell(), SWT.OPEN | SWT.PRIMARY_MODAL);
 	dialog.setFilterExtensions(Executable_Filters);
 	String result = dialog.open();
 	if (result != null) {
 		EditorDescriptor editor = EditorDescriptor.createForProgram(result);
 		// pretend we had obtained it from the list of os registered editors
 		TableItem ti = new TableItem(editorTable, SWT.NULL);
 		ti.setData(editor);
 		ti.setText(editor.getLabel());
 		Image image = editor.getImageDescriptor().createImage();
 		ti.setImage(image);

 		// need to pass an array to setSelection -- 1FSKYVO: SWT:ALL - inconsistent setSelection api on Table
 		editorTable.setSelection(new TableItem[] {ti});
 		editorTable.showSelection();
 		editorTable.setFocus();
 		selectedEditor = editor;

 		/* add to our collection of cached external editors in case the user
 		flips back and forth between internal/external */
 		IEditorDescriptor[] newEditors = new IEditorDescriptor[externalEditors.length + 1];
 		System.arraycopy(externalEditors,0,newEditors,0,externalEditors.length);
 		newEditors[newEditors.length-1] = editor;
 		externalEditors = newEditors;

 		Image[] newImages = new Image[externalEditorImages.length+1];
 		System.arraycopy(externalEditorImages, 0, newImages, 0, externalEditorImages.length);
 		newImages[newImages.length-1] = image;
 		externalEditorImages = newImages;
 	}
 }
 /**
  * Handle a double click event on the list
  */
 protected void handleDoubleClickEvent() {
 	buttonPressed(IDialogConstants.OK_ID);
 }
 /**
  *  Use the dialog store to restore widget values to the values that they held
  *  last time this wizard was used to completion
  */
 protected void restoreWidgetValues() {
 	IDialogSettings settings = getDialogSettings();
 	boolean wasExternal = settings.getBoolean(STORE_ID_INTERNAL_EXTERNAL);
 	internalButton.setSelection(!wasExternal);
 	externalButton.setSelection(wasExternal);
 }
 /**
  *  Since Finish was pressed, write widget values to the dialog store so that they
  *  will persist into the next invocation of this wizard page
  */
 protected void saveWidgetValues() {
 	IDialogSettings settings = getDialogSettings();
 	// record whether use was viewing internal or external editors
 	settings.put(STORE_ID_INTERNAL_EXTERNAL,!internalButton.getSelection());
 }
 /**
  * Set the message displayed by this message dialog
  */
 public void setMessage(String aMessage) {
 	message = aMessage;
 }
 /**
  * Set the editors which will not appear in the dialog.
  *
  * @param editors an array of editors
  */
 public void setEditorsToFilter(IEditorDescriptor[] editors) {
 	editorsToFilter = editors;
 }

 public void updateEnableState() {
 	boolean enableExternal = externalButton.getSelection();
 	browseExternalEditorsButton.setEnabled(enableExternal);
 	updateOkButton();
 }
 protected void createButtonsForButtonBar(Composite parent) {
 	okButton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
 	createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
 	//initially there is no selection so OK button should not be enabled
 	okButton.setEnabled(false);

 }
 /**
  * Update the button enablement state.
  */
 protected void updateOkButton() {
 	// Buttons are null during dialog creation
 	if (okButton == null)
 		return;
 	// If there is no selection, do not enable OK button
 	if (editorTable.getSelectionCount() == 0){
 		okButton.setEnabled(false);
 		return;
 	}
 	// At this point, there is a selection
 	okButton.setEnabled(selectedEditor != null);
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/

	package org.eclipse.ui.internal.dialogs;

	import org.eclipse.ui.internal.registry.*;
	import org.eclipse.ui.*;
	import org.eclipse.ui.help.WorkbenchHelp;
	import org.eclipse.ui.internal.*;
	import org.eclipse.jface.dialogs.*;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.layout.*;
	import org.eclipse.swt.widgets.*;
	import java.util.*;


	/**
	* This class is used to allow the user to select a dialog from the set of
	* internal and external editors.
	*
	* @private
	* This class is internal to the workbench and must not be called outside the workbench
	*/

	public class EditorSelectionDialog extends Dialog implements Listener {
	private EditorDescriptor selectedEditor;
	private Button externalButton;
	private Table editorTable;
	private Button browseExternalEditorsButton;
	private Button internalButton;
	private Button okButton;
	private static final String STORE_ID_INTERNAL_EXTERNAL = "EditorSelectionDialog.STORE_ID_INTERNAL_EXTERNAL";//$NON-NLS-1$
	private String message = WorkbenchMessages.getString("EditorSelection.chooseAnEditor"); //$NON-NLS-1$
	// collection of IEditorDescriptor
	private IEditorDescriptor[] externalEditors;
	private IEditorDescriptor[] internalEditors;
	private Image[] externalEditorImages;
	private Image[] internalEditorImages;
	private IEditorDescriptor[] editorsToFilter;
	private static final String [] Executable_Filters;
	private static final int TABLE_WIDTH = 200;
	static {
	if(SWT.getPlatform().equals("win32")) {//$NON-NLS-1$
	Executable_Filters = new String[] { ".exe", ".bat", "."};//$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	} else {
	Executable_Filters = new String[] {"*"}; //$NON-NLS-1$
	}
	}
	public EditorSelectionDialog(Shell parentShell) {
	super(parentShell);
	}

	/**
	* This method is called if a button has been pressed.
	*/
	protected void buttonPressed(int buttonId) {
	if (buttonId == IDialogConstants.OK_ID)
	saveWidgetValues();
	super.buttonPressed(buttonId);
	}
	/**
	* Close the window.
	*/
	public boolean close() {
	if (internalEditorImages != null) {
	for (int i = 0; i < internalEditorImages.length; i++) {
	internalEditorImages[i].dispose();
	}
	internalEditorImages = null;
	}
	if (externalEditorImages != null) {
	for (int i = 0; i < externalEditorImages.length; i++) {
	externalEditorImages[i].dispose();
	}
	externalEditorImages = null;
	}
	return super.close();
	}
	/* (non-Javadoc)
	* Method declared in Window.
	*/
	protected void configureShell(Shell shell) {
	super.configureShell(shell);
	shell.setText(WorkbenchMessages.getString("EditorSelection.title")); //$NON-NLS-1$
	WorkbenchHelp.setHelp(shell, IHelpContextIds.EDITOR_SELECTION_DIALOG);
	}
	/**
	* Creates and returns the contents of the upper part
	* of the dialog (above the button bar).
	*
	* Subclasses should overide.
	*
	* @param the parent composite to contain the dialog area
	* @return the dialog area control
	*/
	protected Control createDialogArea(Composite parent) {
	Font font = parent.getFont();
	// create main group
	Composite contents = (Composite)super.createDialogArea(parent);
	((GridLayout)contents.getLayout()).numColumns = 2;

	// begin the layout
	Label textLabel = new Label(contents,SWT.NONE);
	textLabel.setText(message);
	GridData data = new GridData();
	data.horizontalSpan = 2;
	textLabel.setLayoutData(data);
	textLabel.setFont(font);

	internalButton = new Button(contents, SWT.RADIO \| SWT.LEFT);
	internalButton.setText(WorkbenchMessages.getString("EditorSelection.internal")); //$NON-NLS-1$
	internalButton.addListener(SWT.Selection, this);
	data = new GridData();
	data.horizontalSpan = 1;
	internalButton.setLayoutData(data);
	internalButton.setFont(font);

	externalButton = new Button(contents, SWT.RADIO \| SWT.LEFT);
	externalButton.setText(WorkbenchMessages.getString("EditorSelection.external")); //$NON-NLS-1$
	externalButton.addListener(SWT.Selection, this);
	data = new GridData();
	data.horizontalSpan = 1;
	externalButton.setLayoutData(data);
	externalButton.setFont(font);

	editorTable = new Table(contents, SWT.SINGLE \| SWT.BORDER);
	editorTable.addListener(SWT.Selection, this);
	editorTable.addListener(SWT.DefaultSelection, this);
	editorTable.addListener(SWT.MouseDoubleClick, this);
	data = new GridData();
	data.widthHint = convertHorizontalDLUsToPixels(TABLE_WIDTH);
	data.horizontalAlignment= GridData.FILL;
	data.grabExcessHorizontalSpace= true;
	data.verticalAlignment= GridData.FILL;
	data.grabExcessVerticalSpace= true;
	data.horizontalSpan = 2;
	editorTable.setLayoutData(data);
	editorTable.setFont(font);
	data.heightHint = editorTable.getItemHeight()*12;

	browseExternalEditorsButton = new Button(contents, SWT.PUSH);
	browseExternalEditorsButton.setText(WorkbenchMessages.getString("EditorSelection.browse")); //$NON-NLS-1$
	browseExternalEditorsButton.addListener(SWT.Selection, this);
	data = new GridData();
	data.heightHint = convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT);
	int widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);
	data.widthHint = Math.max(widthHint, browseExternalEditorsButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
	browseExternalEditorsButton.setLayoutData(data);
	browseExternalEditorsButton.setFont(font);

	restoreWidgetValues(); // Place buttons to the appropriate state

	fillEditorTable();

	updateEnableState();

	return contents;
	}
	protected void fillEditorTable() {
	editorTable.removeAll();
	editorTable.update();
	IEditorDescriptor[] editors;
	Image[] images;
	if (internalButton.getSelection()) {
	editors = getInternalEditors();
	images = internalEditorImages;
	} else {
	editors = getExternalEditors();
	images = externalEditorImages;
	}

	// 1FWHIEX: ITPUI:WINNT - Need to call setRedraw
	editorTable.setRedraw(false);
	for (int i = 0; i < editors.length; i++) {
	TableItem item = new TableItem(editorTable, SWT.NULL);
	item.setData(editors[i]);
	item.setText(editors[i].getLabel());
	item.setImage(images[i]);
	}
	editorTable.setRedraw(true);
	}
	/**
	* Return the dialog store to cache values into
	*/

	protected IDialogSettings getDialogSettings() {
	IDialogSettings workbenchSettings = WorkbenchPlugin.getDefault().getDialogSettings();
	IDialogSettings section = workbenchSettings.getSection("EditorSelectionDialog");//$NON-NLS-1$
	if(section == null)
	section = workbenchSettings.addNewSection("EditorSelectionDialog");//$NON-NLS-1$
	return section;
	}
	/**
	* Get a list of registered programs from the OS
	*/
	protected IEditorDescriptor[] getExternalEditors() {
	if (externalEditors == null) {
	// Since this can take a while, show the busy
	// cursor. If the dialog is not yet visible,
	// then use the parent shell.
	Control shell = getShell();
	if (!shell.isVisible()) {
	Control topShell = shell.getParent();
	if (topShell != null)
	shell = topShell;
	}
	Cursor busy = new Cursor(shell.getDisplay(), SWT.CURSOR_WAIT);
	shell.setCursor(busy);
	// Get the external editors available
	EditorRegistry reg = (EditorRegistry)WorkbenchPlugin.getDefault().getEditorRegistry();
	externalEditors = reg.getSortedEditorsFromOS();
	externalEditors = filterEditors(externalEditors);
	externalEditorImages = getImages(externalEditors);
	// Clean up
	shell.setCursor(null);
	busy.dispose();
	}
	return externalEditors;
	}
	/**
	* Returns an array of editors which have been filtered according to
	* the array of editors in the editorsToFilter instance variable.
	*
	* @param editorsToFilter an array of editors to filter
	* @return a filtered array of editors
	*/
	protected IEditorDescriptor[] filterEditors(IEditorDescriptor[] editors){
	if ((editors == null) \|\| (editors.length < 1))
	return editors;

	if ((editorsToFilter == null) \|\| (editorsToFilter.length < 1))
	return editors;

	ArrayList filteredList = new ArrayList();
	for (int i = 0; i < editors.length; i++) {
	boolean add = true;
	for (int j = 0; j < editorsToFilter.length; j++) {
	if (editors[i].getId().equals(editorsToFilter[j].getId())) {
	add = false;
	}
	}
	if (add)
	filteredList.add(editors[i]);
	}

	return (IEditorDescriptor[]) filteredList.toArray(new IEditorDescriptor[filteredList.size()]);
	}

	/**
	* Returns an array of images for the given array of editors
	*/
	protected Image[] getImages(IEditorDescriptor[] editors) {
	Image[] images = new Image[editors.length];
	for (int i = 0; i < editors.length; i++) {
	images[i] = editors[i].getImageDescriptor().createImage();
	}
	return images;
	}
	/**
	* Returns the internal editors
	*/
	protected IEditorDescriptor[] getInternalEditors() {
	if (internalEditors == null) {
	EditorRegistry reg = (EditorRegistry)WorkbenchPlugin.getDefault().getEditorRegistry();
	internalEditors = reg.getSortedEditorsFromPlugins();
	internalEditors = filterEditors(internalEditors);
	internalEditorImages = getImages(internalEditors);
	}
	return internalEditors;
	}
	/**
	* Return the editor the user selected
	*/
	public IEditorDescriptor getSelectedEditor() {
	return selectedEditor;
	}
	public void handleEvent(Event event) {
	if (event.type == SWT.MouseDoubleClick){
	handleDoubleClickEvent();
	return;
	}
	if (event.widget == externalButton) {
	fillEditorTable();
	} else if (event.widget == browseExternalEditorsButton) {
	promptForExternalEditor();
	} else if (event.widget == editorTable) {
	if (editorTable.getSelectionIndex() != -1){
	selectedEditor = (EditorDescriptor)editorTable.getSelection()[0].getData();
	} else {
	selectedEditor = null;
	okButton.setEnabled(false);
	}
	}
	updateEnableState();
	}
	protected void promptForExternalEditor() {
	FileDialog dialog = new FileDialog(getShell(), SWT.OPEN \| SWT.PRIMARY_MODAL);
	dialog.setFilterExtensions(Executable_Filters);
	String result = dialog.open();
	if (result != null) {
	EditorDescriptor editor = EditorDescriptor.createForProgram(result);
	// pretend we had obtained it from the list of os registered editors
	TableItem ti = new TableItem(editorTable, SWT.NULL);
	ti.setData(editor);
	ti.setText(editor.getLabel());
	Image image = editor.getImageDescriptor().createImage();
	ti.setImage(image);

	// need to pass an array to setSelection -- 1FSKYVO: SWT:ALL - inconsistent setSelection api on Table
	editorTable.setSelection(new TableItem[] {ti});
	editorTable.showSelection();
	editorTable.setFocus();
	selectedEditor = editor;

	/* add to our collection of cached external editors in case the user
	flips back and forth between internal/external */
	IEditorDescriptor[] newEditors = new IEditorDescriptor[externalEditors.length + 1];
	System.arraycopy(externalEditors,0,newEditors,0,externalEditors.length);
	newEditors[newEditors.length-1] = editor;
	externalEditors = newEditors;

	Image[] newImages = new Image[externalEditorImages.length+1];
	System.arraycopy(externalEditorImages, 0, newImages, 0, externalEditorImages.length);
	newImages[newImages.length-1] = image;
	externalEditorImages = newImages;
	}
	}
	/**
	* Handle a double click event on the list
	*/
	protected void handleDoubleClickEvent() {
	buttonPressed(IDialogConstants.OK_ID);
	}
	/**
	* Use the dialog store to restore widget values to the values that they held
	* last time this wizard was used to completion
	*/
	protected void restoreWidgetValues() {
	IDialogSettings settings = getDialogSettings();
	boolean wasExternal = settings.getBoolean(STORE_ID_INTERNAL_EXTERNAL);
	internalButton.setSelection(!wasExternal);
	externalButton.setSelection(wasExternal);
	}
	/**
	* Since Finish was pressed, write widget values to the dialog store so that they
	* will persist into the next invocation of this wizard page
	*/
	protected void saveWidgetValues() {
	IDialogSettings settings = getDialogSettings();
	// record whether use was viewing internal or external editors
	settings.put(STORE_ID_INTERNAL_EXTERNAL,!internalButton.getSelection());
	}
	/**
	* Set the message displayed by this message dialog
	*/
	public void setMessage(String aMessage) {
	message = aMessage;
	}
	/**
	* Set the editors which will not appear in the dialog.
	*
	* @param editors an array of editors
	*/
	public void setEditorsToFilter(IEditorDescriptor[] editors) {
	editorsToFilter = editors;
	}

	public void updateEnableState() {
	boolean enableExternal = externalButton.getSelection();
	browseExternalEditorsButton.setEnabled(enableExternal);
	updateOkButton();
	}
	protected void createButtonsForButtonBar(Composite parent) {
	okButton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
	createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
	//initially there is no selection so OK button should not be enabled
	okButton.setEnabled(false);

	}
	/**
	* Update the button enablement state.
	*/
	protected void updateOkButton() {
	// Buttons are null during dialog creation
	if (okButton == null)
	return;
	// If there is no selection, do not enable OK button
	if (editorTable.getSelectionCount() == 0){
	okButton.setEnabled(false);
	return;
	}
	// At this point, there is a selection
	okButton.setEnabled(selectedEditor != null);
	}
	}