bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/FileDialog.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * 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
  *******************************************************************************/
 package org.eclipse.swt.widgets;


 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.motif.*;
 import org.eclipse.swt.*;

 /**
  * Instances of this class allow the user to navigate
  * the file system and select or enter a file name.
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>SAVE, OPEN, MULTI</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</dd>
  * </dl>
  * <p>
  * IMPORTANT: This class is intended to be subclassed <em>only</em>
  * within the SWT implementation.
  * </p>
  */
 public class FileDialog extends Dialog {
 	int dialog;
 	String [] filterNames = new String [0];
 	String [] filterExtensions = new String [0];
 	String [] fileNames = new String [0];
 	String fileName = ""; //$NON-NLS-1$
 	String filterPath = ""; //$NON-NLS-1$
 	String fullPath;
 	static final String FILTER = "*"; //$NON-NLS-1$
 	static final char SEPARATOR = System.getProperty ("file.separator").charAt (0); //$NON-NLS-1$

 /**
  * Constructs a new instance of this class given only its parent.
  *
  * @param parent a shell which will be the parent of the new instance
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
  *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
  * </ul>
  */
 public FileDialog (Shell parent) {
 	this (parent, SWT.PRIMARY_MODAL);
 }

 /**
  * Constructs a new instance of this class given its parent
  * and a style value describing its behavior and appearance.
  * <p>
  * The style value is either one of the style constants defined in
  * class <code>SWT</code> which is applicable to instances of this
  * class, or must be built by <em>bitwise OR</em>'ing together
  * (that is, using the <code>int</code> "|" operator) two or more
  * of those <code>SWT</code> style constants. The class description
  * lists the style constants that are applicable to the class.
  * Style bits are also inherited from superclasses.
  * </p>
  *
  * @param parent a shell which will be the parent of the new instance
  * @param style the style of dialog to construct
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
  *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
  * </ul>
  */
 public FileDialog (Shell parent, int style) {
 	super (parent, style);
 	checkSubclass ();
 }

 int cancelPressed (int widget, int client, int call) {
 	OS.XtUnmanageChild (widget);
 	return 0;
 }
 /**
  * Returns the path of the first file that was
  * selected in the dialog relative to the filter path
  *
  * @return the relative path of the file
  */
 public String getFileName () {
 	return fileName;
 }

 /**
  * Returns the paths of all files that were selected
  * in the dialog relative to the filter path.
  *
  * @return the relative paths of the files
  */
 public String [] getFileNames () {
 	return fileNames;
 }

 /**
  * Returns the file extensions which the dialog will
  * use to filter the files it shows.
  *
  * @return the file extensions filter
  */
 public String [] getFilterExtensions () {
 	return filterExtensions;
 }

 /**
  * Returns the file names which the dialog will
  * use to filter the files it shows.
  *
  * @return the file name filter
  */
 public String [] getFilterNames () {
 	return filterNames;
 }

 /**
  * Returns the directory path that the dialog will use.
  * File names in this path will appear in the dialog,
  * filtered according to the filter extensions.
  *
  * @return the directory path string
  *
  * @see #setFilterExtensions
  */
 public String getFilterPath () {
 	return filterPath;
 }

 int itemSelected (int widget, int client, int call) {
 	/* this callback will only be hooked if the dialog style is MULTI */
 	int fileList = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_LIST);
 	if (fileList == 0) return 0;
 	int selectionText = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_TEXT);
 	if (selectionText == 0) return 0;

 	int [] argList = {OS.XmNselectedItems, 0, OS.XmNselectedItemCount, 0};
 	OS.XtGetValues (fileList, argList, argList.length / 2);
 	int items = argList [1], itemCount = argList [3];
 	int ptr = 0;
 	if (itemCount == 0) {
 		int [] argList2 = {OS.XmNdirectory, 0};
 		OS.XtGetValues (dialog, argList2, argList2.length / 2);
 		ptr = argList2 [1];
 	} else {
 		int [] buffer = new int [1];
 		OS.memmove (buffer, items, 4);
 		ptr = buffer [0];
 	}
 	if (ptr == 0) return 0;
 	Display display = parent.getDisplay ();
 	int [] table = new int [] {display.tabMapping, display.crMapping};
 	int address = OS.XmStringUnparse (
 		ptr,
 		null,
 		OS.XmCHARSET_TEXT,
 		OS.XmCHARSET_TEXT,
 		table,
 		table.length,
 		OS.XmOUTPUT_ALL);
 	if (itemCount == 0) OS.XmStringFree (ptr);
 	if (address == 0) return 0;
 	int length = OS.strlen (address);
 	byte [] buffer = new byte [length + 1];
 	OS.memmove (buffer, address, length);
 	OS.XtFree (address);

 	OS.XmTextSetString (selectionText, buffer);
 	OS.XmTextSetInsertionPosition (selectionText, OS.XmTextGetLastPosition (selectionText));
 	return 0;
 }

 int okPressed (int widget, int client, int call) {
 	String fullPath = null, fileName = null;
 	String [] fileNames = null;

 	int [] argList = {OS.XmNdirSpec, 0, OS.XmNdirectory, 0};
 	OS.XtGetValues (dialog, argList, argList.length / 2);

 	int xmString1 = argList [1];
 	Display display = parent.getDisplay ();
 	int [] table = new int [] {display.tabMapping, display.crMapping};
 	int ptr = OS.XmStringUnparse (
 		xmString1,
 		null,
 		OS.XmCHARSET_TEXT,
 		OS.XmCHARSET_TEXT,
 		table,
 		table.length,
 		OS.XmOUTPUT_ALL);
 	if (ptr != 0) {
 		int length = OS.strlen (ptr);
 		byte [] buffer = new byte [length];
 		OS.memmove (buffer, ptr, length);
 		OS.XtFree (ptr);
 		/* Use the character encoding for the default locale */
 		fullPath = new String (Converter.mbcsToWcs (null, buffer)).trim();
 	}
 	OS.XmStringFree (xmString1);

 	if ((style & SWT.MULTI) != 0) {
 		int fileList = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_LIST);
 		if (fileList == 0) return 0;
 		int [] argList2 = {OS.XmNselectedItems, 0, OS.XmNselectedItemCount, 0};
 		OS.XtGetValues (fileList, argList2, argList2.length / 2);
 		int items = argList2 [1], itemCount = argList2 [3];
 		int [] buffer1 = new int [1];
 		fileNames = new String [itemCount];
 		boolean match = false;
 		for (int i = 0; i < itemCount; i++) {
 			OS.memmove (buffer1, items, 4);
 			ptr = buffer1 [0];
 			int address = OS.XmStringUnparse (
 				ptr,
 				null,
 				OS.XmCHARSET_TEXT,
 				OS.XmCHARSET_TEXT,
 				table,
 				table.length,
 				OS.XmOUTPUT_ALL);
 			if (address != 0) {
 				int length = OS.strlen (address);
 				byte [] buffer = new byte [length];
 				OS.memmove (buffer, address, length);
 				OS.XtFree (address);
 				/* Use the character encoding for the default locale */
 				String fullFilename = new String (Converter.mbcsToWcs (null, buffer));
 				int index = fullFilename.lastIndexOf (SEPARATOR);
 				fileNames [i] = fullFilename.substring (index + 1, fullFilename.length ());
 				if (fullFilename.equals (fullPath)) match = true;
 			}
 			items += 4;
 		}
 		if (match) {
 			fileName = fileNames [0];
 		} else {
 			/* The user has modified the text field such that it doesn't match any
 			 * of the selected files, so use this value instead
 			 */
 			int index = fullPath.lastIndexOf (SEPARATOR);
 			fileName = fullPath.substring (index + 1, fullPath.length ());
 			fileNames = new String [] {fileName};
 		}
 	} else {
 		int index = fullPath.lastIndexOf (SEPARATOR);
 		fileName = fullPath.substring (index + 1, fullPath.length ());
 		fileNames = new String [] {fileName};
 	}

 	// if no file selected then go into the current directory
 	if (fileName.equals("")) { //$NON-NLS-1$
 		int [] argList1 = {OS.XmNdirMask, 0};
 		OS.XtGetValues (dialog, argList1, argList1.length / 2);
 		int directoryHandle = argList1[1];
 		int [] argList2 = {OS.XmNpattern,directoryHandle};
 		OS.XtSetValues (dialog, argList2, argList2.length / 2);
 		OS.XmStringFree (directoryHandle);
 		return 0;
 	}

 	int xmString2 = argList [3];
 	ptr = OS.XmStringUnparse (
 		xmString2,
 		null,
 		OS.XmCHARSET_TEXT,
 		OS.XmCHARSET_TEXT,
 		table,
 		table.length,
 		OS.XmOUTPUT_ALL);
 	if (ptr != 0) {
 		int length = OS.strlen (ptr);
 		byte [] buffer = new byte [length];
 		OS.memmove (buffer, ptr, length);
 		OS.XtFree (ptr);
 		/* Use the character encoding for the default locale */
 		filterPath = new String (Converter.mbcsToWcs (null, buffer));
 	}
 	OS.XmStringFree (xmString2);
 	int length = filterPath.length ();
 	if (length > 0) {
 		if (filterPath.charAt (length - 1) == SEPARATOR) {
 			filterPath = filterPath.substring (0, length - 1);
 		}
 	}

 	this.fullPath = fullPath;
 	this.fileName = fileName;
 	this.fileNames = fileNames;
 	OS.XtUnmanageChild (widget);
 	return 0;
 }

 /**
  * Makes the dialog visible and brings it to the front
  * of the display.
  *
  * @return a string describing the absolute path of the first selected file,
  *         or null if the dialog was cancelled or an error occurred
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
  * </ul>
  */
 public String open () {
 	/* Compute the dialog title */
 	/*
 	* Feature in Motif.  It is not possible to set a shell
 	* title to an empty string.  The fix is to set the title
 	* to be a single space.
 	*/
 	String string = title;
 	if (string.length () == 0) string = " "; //$NON-NLS-1$
 	/* Use the character encoding for the default locale */
 	byte [] buffer1 = Converter.wcsToMbcs (null, string, true);
 	int xmStringPtr1 = OS.XmStringParseText (
 		buffer1,
 		0,
 		OS.XmFONTLIST_DEFAULT_TAG,
 		OS.XmCHARSET_TEXT,
 		null,
 		0,
 		0);

 	fullPath = null;
 	fileNames = new String [0];

 	/* Compute the filter */
 	String mask = FILTER;
 	if (filterExtensions == null) filterExtensions = new String [0];
 	if (filterNames == null) filterNames = new String [0];
 	if (filterExtensions.length != 0) {
 		/* Motif does not support multiple filters, so ignore them
 		 * if there are more than one, or if there is a ; separator.
 		 */
 		if (filterExtensions.length == 1) {
 			String filter = filterExtensions [0];
 			if (filter.indexOf (';', 0) == -1) mask = filter;
 		}
 	}
 	/* Use the character encoding for the default locale */
 	byte [] buffer2 = Converter.wcsToMbcs (null, mask, true);
 	int xmStringPtr2 = OS.XmStringParseText (
 		buffer2,
 		0,
 		OS.XmFONTLIST_DEFAULT_TAG,
 		OS.XmCHARSET_TEXT,
 		null,
 		0,
 		0);

 	/* Compute the filter path */
 	if (filterPath == null) filterPath = ""; //$NON-NLS-1$
 	int length = filterPath.length ();
 	if (length == 0 || filterPath.charAt (length - 1) != SEPARATOR) {
 		filterPath += SEPARATOR;
 	}
 	/* Use the character encoding for the default locale */
 	byte [] buffer3 = Converter.wcsToMbcs (null, filterPath, true);
 	int xmStringPtr3 = OS.XmStringParseText (
 		buffer3,
 		0,
 		OS.XmFONTLIST_DEFAULT_TAG,
 		OS.XmCHARSET_TEXT,
 		null,
 		0,
 		0);

 	/* Create the dialog */
 	Display display = parent.display;
 	int [] argList1 = {
 		OS.XmNresizePolicy, OS.XmRESIZE_NONE,
 		OS.XmNdialogStyle, OS.XmDIALOG_PRIMARY_APPLICATION_MODAL,
 		OS.XmNwidth, OS.XDisplayWidth (display.xDisplay, OS.XDefaultScreen (display.xDisplay)) * 4 / 9,
 		OS.XmNpathMode, OS.XmPATH_MODE_FULL,
 		OS.XmNdialogTitle, xmStringPtr1,
 		OS.XmNpattern, xmStringPtr2,
 		OS.XmNdirMask, xmStringPtr3,
 	};
 	/*
 	* Bug in AIX. The dialog does not responde to input, if the parent
 	* is not realized.  The fix is to realized the parent.
 	*/
 	if (OS.IsAIX) parent.realizeWidget ();
 	int parentHandle = parent.shellHandle;
 	/*
 	* Feature in Linux.  For some reason, the XmCreateFileSelectionDialog()
 	* will not accept NULL for the widget name.  This works fine on the other
 	* Motif platforms and in the other XmCreate calls on Linux.  The fix is
 	* to pass in a NULL terminated string, not a NULL pointer.
 	*/
 	byte [] name = new byte [] {0};
 	dialog = OS.XmCreateFileSelectionDialog (parentHandle, name, argList1, argList1.length / 2);
 	int child = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_HELP_BUTTON);
 	if (child != 0) OS.XtUnmanageChild (child);
 	OS.XmStringFree (xmStringPtr1);
 	OS.XmStringFree (xmStringPtr2);
 	OS.XmStringFree (xmStringPtr3);

 	/*
 	 * Can override the selection text field if necessary now that
 	 * its initial value has been computed by the platform dialog.
 	 */
 	if (fileName != null && fileName.length() > 0) {
 		/* Use the character encoding for the default locale */
 		byte [] buffer4 = Converter.wcsToMbcs (null, fileName, true);
 		int xmStringPtr4 = OS.XmStringParseText (
 				buffer4,
 				0,
 				OS.XmFONTLIST_DEFAULT_TAG,
 				OS.XmCHARSET_TEXT,
 				null,
 				0,
 				0);
 		int [] argList2 = {OS.XmNdirSpec, 0};
 		OS.XtGetValues (dialog, argList2, argList2.length / 2);
 		int oldDirSpec = argList2 [1];
 		int newDirSpec = OS.XmStringConcat (oldDirSpec, xmStringPtr4);
 		argList2 [1] = newDirSpec;
 		OS.XtSetValues (dialog, argList2, argList2.length / 2);
 		OS.XmStringFree (xmStringPtr4);
 		OS.XmStringFree (oldDirSpec);
 		OS.XmStringFree (newDirSpec);
 	}

 	/* Hook the callbacks. */
 	Callback cancelCallback = new Callback (this, "cancelPressed", 3); //$NON-NLS-1$
 	int cancelAddress = cancelCallback.getAddress ();
 	if (cancelAddress == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
 	OS.XtAddCallback (dialog, OS.XmNcancelCallback, cancelAddress, 0);
 	Callback okCallback = new Callback (this, "okPressed", 3); //$NON-NLS-1$
 	int okAddress = okCallback.getAddress ();
 	if (okAddress == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
 	OS.XtAddCallback (dialog, OS.XmNokCallback, okAddress, 0);
 	Callback selectCallback = null;
 	if ((style & SWT.MULTI) != 0) {
 		child = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_LIST);
 		if (child != 0) {
 			int [] argList3 = {OS.XmNselectionPolicy, OS.XmEXTENDED_SELECT};
 			OS.XtSetValues(child, argList3, argList3.length / 2);
 			selectCallback = new Callback (this, "itemSelected", 3); //$NON-NLS-1$
 			int selectAddress = selectCallback.getAddress ();
 			if (selectAddress == 0) error (SWT.ERROR_NO_MORE_CALLBACKS);
 			OS.XtAddCallback (child, OS.XmNextendedSelectionCallback, selectAddress, 0);
 		}
 	}

 	OS.XtManageChild (dialog);

 	// Should be a pure OS message loop (no SWT AppContext)
 	while (OS.XtIsRealized (dialog) && OS.XtIsManaged (dialog))
 		if (!display.readAndDispatch ()) display.sleep ();

 	/* Destroy the dialog and update the display. */
 	if (OS.XtIsRealized (dialog)) OS.XtDestroyWidget (dialog);
 	okCallback.dispose ();
 	cancelCallback.dispose ();
 	if (selectCallback != null) selectCallback.dispose ();
 	return fullPath;
 }

 /**
  * Set the initial filename which the dialog will
  * select by default when opened to the argument,
  * which may be null.  The name will be prefixed with
  * the filter path when one is supplied.
  *
  * @param string the file name
  */
 public void setFileName (String string) {
 	fileName = string;
 }

 /**
  * Set the file extensions which the dialog will
  * use to filter the files it shows to the argument,
  * which may be null.
  *
  * @param extensions the file extension filter
  */
 public void setFilterExtensions (String [] extensions) {
 	filterExtensions = extensions;
 }

 /**
  * Sets the file names which the dialog will
  * use to filter the files it shows to the argument,
  * which may be null.
  *
  * @param names the file name filter
  */
 public void setFilterNames (String [] names) {
 	filterNames = names;
 }

 /**
  * Sets the directory path that the dialog will use
  * to the argument, which may be null. File names in this
  * path will appear in the dialog, filtered according
  * to the filter extensions.
  *
  * @param string the directory path
  *
  * @see #setFilterExtensions
  */
 public void setFilterPath (String string) {
 	filterPath = string;
 }
 }
	/*******************************************************************************
	* 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
	*******************************************************************************/
	package org.eclipse.swt.widgets;


	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.motif.*;
	import org.eclipse.swt.*;

	/**
	* Instances of this class allow the user to navigate
	* the file system and select or enter a file name.
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>SAVE, OPEN, MULTI</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</dd>
	* </dl>
	* <p>
	* IMPORTANT: This class is intended to be subclassed <em>only</em>
	* within the SWT implementation.
	* </p>
	*/
	public class FileDialog extends Dialog {
	int dialog;
	String [] filterNames = new String [0];
	String [] filterExtensions = new String [0];
	String [] fileNames = new String [0];
	String fileName = ""; //$NON-NLS-1$
	String filterPath = ""; //$NON-NLS-1$
	String fullPath;
	static final String FILTER = "*"; //$NON-NLS-1$
	static final char SEPARATOR = System.getProperty ("file.separator").charAt (0); //$NON-NLS-1$

	/**
	* Constructs a new instance of this class given only its parent.
	*
	* @param parent a shell which will be the parent of the new instance
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
	* </ul>
	*/
	public FileDialog (Shell parent) {
	this (parent, SWT.PRIMARY_MODAL);
	}

	/**
	* Constructs a new instance of this class given its parent
	* and a style value describing its behavior and appearance.
	* <p>
	* The style value is either one of the style constants defined in
	* class <code>SWT</code> which is applicable to instances of this
	* class, or must be built by <em>bitwise OR</em>'ing together
	* (that is, using the <code>int</code> "\|" operator) two or more
	* of those <code>SWT</code> style constants. The class description
	* lists the style constants that are applicable to the class.
	* Style bits are also inherited from superclasses.
	* </p>
	*
	* @param parent a shell which will be the parent of the new instance
	* @param style the style of dialog to construct
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
	* </ul>
	*/
	public FileDialog (Shell parent, int style) {
	super (parent, style);
	checkSubclass ();
	}

	int cancelPressed (int widget, int client, int call) {
	OS.XtUnmanageChild (widget);
	return 0;
	}
	/**
	* Returns the path of the first file that was
	* selected in the dialog relative to the filter path
	*
	* @return the relative path of the file
	*/
	public String getFileName () {
	return fileName;
	}

	/**
	* Returns the paths of all files that were selected
	* in the dialog relative to the filter path.
	*
	* @return the relative paths of the files
	*/
	public String [] getFileNames () {
	return fileNames;
	}

	/**
	* Returns the file extensions which the dialog will
	* use to filter the files it shows.
	*
	* @return the file extensions filter
	*/
	public String [] getFilterExtensions () {
	return filterExtensions;
	}

	/**
	* Returns the file names which the dialog will
	* use to filter the files it shows.
	*
	* @return the file name filter
	*/
	public String [] getFilterNames () {
	return filterNames;
	}

	/**
	* Returns the directory path that the dialog will use.
	* File names in this path will appear in the dialog,
	* filtered according to the filter extensions.
	*
	* @return the directory path string
	*
	* @see #setFilterExtensions
	*/
	public String getFilterPath () {
	return filterPath;
	}

	int itemSelected (int widget, int client, int call) {
	/* this callback will only be hooked if the dialog style is MULTI */
	int fileList = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_LIST);
	if (fileList == 0) return 0;
	int selectionText = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_TEXT);
	if (selectionText == 0) return 0;

	int [] argList = {OS.XmNselectedItems, 0, OS.XmNselectedItemCount, 0};
	OS.XtGetValues (fileList, argList, argList.length / 2);
	int items = argList [1], itemCount = argList [3];
	int ptr = 0;
	if (itemCount == 0) {
	int [] argList2 = {OS.XmNdirectory, 0};
	OS.XtGetValues (dialog, argList2, argList2.length / 2);
	ptr = argList2 [1];
	} else {
	int [] buffer = new int [1];
	OS.memmove (buffer, items, 4);
	ptr = buffer [0];
	}
	if (ptr == 0) return 0;
	Display display = parent.getDisplay ();
	int [] table = new int [] {display.tabMapping, display.crMapping};
	int address = OS.XmStringUnparse (
	ptr,
	null,
	OS.XmCHARSET_TEXT,
	OS.XmCHARSET_TEXT,
	table,
	table.length,
	OS.XmOUTPUT_ALL);
	if (itemCount == 0) OS.XmStringFree (ptr);
	if (address == 0) return 0;
	int length = OS.strlen (address);
	byte [] buffer = new byte [length + 1];
	OS.memmove (buffer, address, length);
	OS.XtFree (address);

	OS.XmTextSetString (selectionText, buffer);
	OS.XmTextSetInsertionPosition (selectionText, OS.XmTextGetLastPosition (selectionText));
	return 0;
	}

	int okPressed (int widget, int client, int call) {
	String fullPath = null, fileName = null;
	String [] fileNames = null;

	int [] argList = {OS.XmNdirSpec, 0, OS.XmNdirectory, 0};
	OS.XtGetValues (dialog, argList, argList.length / 2);

	int xmString1 = argList [1];
	Display display = parent.getDisplay ();
	int [] table = new int [] {display.tabMapping, display.crMapping};
	int ptr = OS.XmStringUnparse (
	xmString1,
	null,
	OS.XmCHARSET_TEXT,
	OS.XmCHARSET_TEXT,
	table,
	table.length,
	OS.XmOUTPUT_ALL);
	if (ptr != 0) {
	int length = OS.strlen (ptr);
	byte [] buffer = new byte [length];
	OS.memmove (buffer, ptr, length);
	OS.XtFree (ptr);
	/* Use the character encoding for the default locale */
	fullPath = new String (Converter.mbcsToWcs (null, buffer)).trim();
	}
	OS.XmStringFree (xmString1);

	if ((style & SWT.MULTI) != 0) {
	int fileList = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_LIST);
	if (fileList == 0) return 0;
	int [] argList2 = {OS.XmNselectedItems, 0, OS.XmNselectedItemCount, 0};
	OS.XtGetValues (fileList, argList2, argList2.length / 2);
	int items = argList2 [1], itemCount = argList2 [3];
	int [] buffer1 = new int [1];
	fileNames = new String [itemCount];
	boolean match = false;
	for (int i = 0; i < itemCount; i++) {
	OS.memmove (buffer1, items, 4);
	ptr = buffer1 [0];
	int address = OS.XmStringUnparse (
	ptr,
	null,
	OS.XmCHARSET_TEXT,
	OS.XmCHARSET_TEXT,
	table,
	table.length,
	OS.XmOUTPUT_ALL);
	if (address != 0) {
	int length = OS.strlen (address);
	byte [] buffer = new byte [length];
	OS.memmove (buffer, address, length);
	OS.XtFree (address);
	/* Use the character encoding for the default locale */
	String fullFilename = new String (Converter.mbcsToWcs (null, buffer));
	int index = fullFilename.lastIndexOf (SEPARATOR);
	fileNames [i] = fullFilename.substring (index + 1, fullFilename.length ());
	if (fullFilename.equals (fullPath)) match = true;
	}
	items += 4;
	}
	if (match) {
	fileName = fileNames [0];
	} else {
	/* The user has modified the text field such that it doesn't match any
	* of the selected files, so use this value instead
	*/
	int index = fullPath.lastIndexOf (SEPARATOR);
	fileName = fullPath.substring (index + 1, fullPath.length ());
	fileNames = new String [] {fileName};
	}
	} else {
	int index = fullPath.lastIndexOf (SEPARATOR);
	fileName = fullPath.substring (index + 1, fullPath.length ());
	fileNames = new String [] {fileName};
	}

	// if no file selected then go into the current directory
	if (fileName.equals("")) { //$NON-NLS-1$
	int [] argList1 = {OS.XmNdirMask, 0};
	OS.XtGetValues (dialog, argList1, argList1.length / 2);
	int directoryHandle = argList1[1];
	int [] argList2 = {OS.XmNpattern,directoryHandle};
	OS.XtSetValues (dialog, argList2, argList2.length / 2);
	OS.XmStringFree (directoryHandle);
	return 0;
	}

	int xmString2 = argList [3];
	ptr = OS.XmStringUnparse (
	xmString2,
	null,
	OS.XmCHARSET_TEXT,
	OS.XmCHARSET_TEXT,
	table,
	table.length,
	OS.XmOUTPUT_ALL);
	if (ptr != 0) {
	int length = OS.strlen (ptr);
	byte [] buffer = new byte [length];
	OS.memmove (buffer, ptr, length);
	OS.XtFree (ptr);
	/* Use the character encoding for the default locale */
	filterPath = new String (Converter.mbcsToWcs (null, buffer));
	}
	OS.XmStringFree (xmString2);
	int length = filterPath.length ();
	if (length > 0) {
	if (filterPath.charAt (length - 1) == SEPARATOR) {
	filterPath = filterPath.substring (0, length - 1);
	}
	}

	this.fullPath = fullPath;
	this.fileName = fileName;
	this.fileNames = fileNames;
	OS.XtUnmanageChild (widget);
	return 0;
	}

	/**
	* Makes the dialog visible and brings it to the front
	* of the display.
	*
	* @return a string describing the absolute path of the first selected file,
	* or null if the dialog was cancelled or an error occurred
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
	* </ul>
	*/
	public String open () {
	/* Compute the dialog title */
	/*
	* Feature in Motif. It is not possible to set a shell
	* title to an empty string. The fix is to set the title
	* to be a single space.
	*/
	String string = title;
	if (string.length () == 0) string = " "; //$NON-NLS-1$
	/* Use the character encoding for the default locale */
	byte [] buffer1 = Converter.wcsToMbcs (null, string, true);
	int xmStringPtr1 = OS.XmStringParseText (
	buffer1,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);

	fullPath = null;
	fileNames = new String [0];

	/* Compute the filter */
	String mask = FILTER;
	if (filterExtensions == null) filterExtensions = new String [0];
	if (filterNames == null) filterNames = new String [0];
	if (filterExtensions.length != 0) {
	/* Motif does not support multiple filters, so ignore them
	* if there are more than one, or if there is a ; separator.
	*/
	if (filterExtensions.length == 1) {
	String filter = filterExtensions [0];
	if (filter.indexOf (';', 0) == -1) mask = filter;
	}
	}
	/* Use the character encoding for the default locale */
	byte [] buffer2 = Converter.wcsToMbcs (null, mask, true);
	int xmStringPtr2 = OS.XmStringParseText (
	buffer2,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);

	/* Compute the filter path */
	if (filterPath == null) filterPath = ""; //$NON-NLS-1$
	int length = filterPath.length ();
	if (length == 0 \|\| filterPath.charAt (length - 1) != SEPARATOR) {
	filterPath += SEPARATOR;
	}
	/* Use the character encoding for the default locale */
	byte [] buffer3 = Converter.wcsToMbcs (null, filterPath, true);
	int xmStringPtr3 = OS.XmStringParseText (
	buffer3,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);

	/* Create the dialog */
	Display display = parent.display;
	int [] argList1 = {
	OS.XmNresizePolicy, OS.XmRESIZE_NONE,
	OS.XmNdialogStyle, OS.XmDIALOG_PRIMARY_APPLICATION_MODAL,
	OS.XmNwidth, OS.XDisplayWidth (display.xDisplay, OS.XDefaultScreen (display.xDisplay)) * 4 / 9,
	OS.XmNpathMode, OS.XmPATH_MODE_FULL,
	OS.XmNdialogTitle, xmStringPtr1,
	OS.XmNpattern, xmStringPtr2,
	OS.XmNdirMask, xmStringPtr3,
	};
	/*
	* Bug in AIX. The dialog does not responde to input, if the parent
	* is not realized. The fix is to realized the parent.
	*/
	if (OS.IsAIX) parent.realizeWidget ();
	int parentHandle = parent.shellHandle;
	/*
	* Feature in Linux. For some reason, the XmCreateFileSelectionDialog()
	* will not accept NULL for the widget name. This works fine on the other
	* Motif platforms and in the other XmCreate calls on Linux. The fix is
	* to pass in a NULL terminated string, not a NULL pointer.
	*/
	byte [] name = new byte [] {0};
	dialog = OS.XmCreateFileSelectionDialog (parentHandle, name, argList1, argList1.length / 2);
	int child = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_HELP_BUTTON);
	if (child != 0) OS.XtUnmanageChild (child);
	OS.XmStringFree (xmStringPtr1);
	OS.XmStringFree (xmStringPtr2);
	OS.XmStringFree (xmStringPtr3);

	/*
	* Can override the selection text field if necessary now that
	* its initial value has been computed by the platform dialog.
	*/
	if (fileName != null && fileName.length() > 0) {
	/* Use the character encoding for the default locale */
	byte [] buffer4 = Converter.wcsToMbcs (null, fileName, true);
	int xmStringPtr4 = OS.XmStringParseText (
	buffer4,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	int [] argList2 = {OS.XmNdirSpec, 0};
	OS.XtGetValues (dialog, argList2, argList2.length / 2);
	int oldDirSpec = argList2 [1];
	int newDirSpec = OS.XmStringConcat (oldDirSpec, xmStringPtr4);
	argList2 [1] = newDirSpec;
	OS.XtSetValues (dialog, argList2, argList2.length / 2);
	OS.XmStringFree (xmStringPtr4);
	OS.XmStringFree (oldDirSpec);
	OS.XmStringFree (newDirSpec);
	}

	/* Hook the callbacks. */
	Callback cancelCallback = new Callback (this, "cancelPressed", 3); //$NON-NLS-1$
	int cancelAddress = cancelCallback.getAddress ();
	if (cancelAddress == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
	OS.XtAddCallback (dialog, OS.XmNcancelCallback, cancelAddress, 0);
	Callback okCallback = new Callback (this, "okPressed", 3); //$NON-NLS-1$
	int okAddress = okCallback.getAddress ();
	if (okAddress == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
	OS.XtAddCallback (dialog, OS.XmNokCallback, okAddress, 0);
	Callback selectCallback = null;
	if ((style & SWT.MULTI) != 0) {
	child = OS.XmFileSelectionBoxGetChild (dialog, OS.XmDIALOG_LIST);
	if (child != 0) {
	int [] argList3 = {OS.XmNselectionPolicy, OS.XmEXTENDED_SELECT};
	OS.XtSetValues(child, argList3, argList3.length / 2);
	selectCallback = new Callback (this, "itemSelected", 3); //$NON-NLS-1$
	int selectAddress = selectCallback.getAddress ();
	if (selectAddress == 0) error (SWT.ERROR_NO_MORE_CALLBACKS);
	OS.XtAddCallback (child, OS.XmNextendedSelectionCallback, selectAddress, 0);
	}
	}

	OS.XtManageChild (dialog);

	// Should be a pure OS message loop (no SWT AppContext)
	while (OS.XtIsRealized (dialog) && OS.XtIsManaged (dialog))
	if (!display.readAndDispatch ()) display.sleep ();

	/* Destroy the dialog and update the display. */
	if (OS.XtIsRealized (dialog)) OS.XtDestroyWidget (dialog);
	okCallback.dispose ();
	cancelCallback.dispose ();
	if (selectCallback != null) selectCallback.dispose ();
	return fullPath;
	}

	/**
	* Set the initial filename which the dialog will
	* select by default when opened to the argument,
	* which may be null. The name will be prefixed with
	* the filter path when one is supplied.
	*
	* @param string the file name
	*/
	public void setFileName (String string) {
	fileName = string;
	}

	/**
	* Set the file extensions which the dialog will
	* use to filter the files it shows to the argument,
	* which may be null.
	*
	* @param extensions the file extension filter
	*/
	public void setFilterExtensions (String [] extensions) {
	filterExtensions = extensions;
	}

	/**
	* Sets the file names which the dialog will
	* use to filter the files it shows to the argument,
	* which may be null.
	*
	* @param names the file name filter
	*/
	public void setFilterNames (String [] names) {
	filterNames = names;
	}

	/**
	* Sets the directory path that the dialog will use
	* to the argument, which may be null. File names in this
	* path will appear in the dialog, filtered according
	* to the filter extensions.
	*
	* @param string the directory path
	*
	* @see #setFilterExtensions
	*/
	public void setFilterPath (String string) {
	filterPath = string;
	}
	}