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/*******************************************************************************
* Copyright (c) 2000, 2009 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.photon.*;
import org.eclipse.swt.*;
/**
* Instances of this class allow the user to navigate
* the file system and select a directory.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>(none)</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>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#directorydialog">DirectoryDialog snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class DirectoryDialog extends Dialog {
String message = "", filterPath = "";
/**
* 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 DirectoryDialog (Shell parent) {
this (parent, SWT.APPLICATION_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 DirectoryDialog (Shell parent, int style) {
super (parent, checkStyle (parent, style));
checkSubclass ();
}
/**
* Returns the path which the dialog will use to filter
* the directories it shows.
*
* @return the filter path
*
* @see #setFilterPath
*/
public String getFilterPath () {
return filterPath;
}
/**
* Returns the dialog's message, which is a description of
* the purpose for which it was opened. This message will be
* visible on the dialog while it is open.
*
* @return the message
*/
public String getMessage () {
return message;
}
/**
* Makes the dialog visible and brings it to the front
* of the display.
*
* @return a string describing the absolute path of the selected directory,
* 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 () {
int parentHandle = 0;
if (parent != null && OS.PtWidgetIsRealized(parent.shellHandle)) {
parentHandle = parent.shellHandle;
}
byte [] title = null;
if (this.title != null) title = Converter.wcsToMbcs (null, this.title, true);
byte [] root_dir = null;
if (filterPath != null) {
root_dir = Converter.wcsToMbcs (null, filterPath, true);
}
byte [] file_spec = null;
int flags = OS.Pt_FSR_NO_FCHECK | OS.Pt_FSR_NO_SELECT_FILES | OS.Pt_FSR_SELECT_DIRS;
PtFileSelectionInfo_t info = new PtFileSelectionInfo_t ();
OS.PtFileSelection (parentHandle, null, title, root_dir, file_spec, null, null, null, info, flags);
if (info.ret == OS.Pt_FSDIALOG_BTN2) return null;
int length = 0;
while (length < info.path.length && info.path [length] != 0) length++;
byte [] path = new byte [length];
System.arraycopy (info.path, 0, path, 0, length);
return filterPath = new String (Converter.mbcsToWcs (null, path));
}
/**
* Sets the path that the dialog will use to filter
* the directories it shows to the argument, which may
* be null. If the string is null, then the operating
* system's default filter path will be used.
* <p>
* Note that the path string is platform dependent.
* For convenience, either '/' or '\' can be used
* as a path separator.
* </p>
*
* @param string the filter path
*/
public void setFilterPath (String string) {
filterPath = string;
}
/**
* Sets the dialog's message, which is a description of
* the purpose for which it was opened. This message will be
* visible on the dialog while it is open.
*
* @param string the message
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
*/
public void setMessage (String string) {
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
message = string;
}
}
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