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package org.eclipse.swt.widgets;
/*
* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
* This file is 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
*/
import org.eclipse.swt.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.gtk.*;
/**
* Instances of this class allow the user to navigate
* the file system and select a directory.
* <p>
* IMPORTANT: This class is intended to be subclassed <em>only</em>
* within the SWT implementation.
* </p>
*/
public class DirectoryDialog extends Dialog {
String message = "", filterPath = "";
/**
* Constructs a new instance of this class given only its
* parent.
* <p>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the dialog on the currently active
* display if there is one. If there is no current display, the
* dialog is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @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.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>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the dialog on the currently active
* display if there is one. If there is no current display, the
* dialog is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @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, int style) {
super (parent, style);
checkSubclass ();
}
/**
* Returns the path which the dialog will use to filter
* the directories it shows.
*
* @return the filter path
*/
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 () {
byte [] titleBytes = Converter.wcsToMbcs (null, title, true);
int handle = OS.gtk_file_selection_new (titleBytes);
if (parent != null) {
OS.gtk_window_set_transient_for (handle, parent.topHandle ());
}
String answer = null;
if (filterPath != null) {
int length = filterPath.length ();
char [] buffer = new char [length + 1];
filterPath.getChars (0, length, buffer, 0);
int utf8Ptr = OS.g_utf16_to_utf8 (buffer, -1, null, null, null);
int fileNamePtr = OS.g_filename_from_utf8 (utf8Ptr, -1, null, null, null);
OS.gtk_file_selection_set_filename (handle, fileNamePtr);
OS.g_free (utf8Ptr);
OS.g_free (fileNamePtr);
}
GtkFileSelection selection = new GtkFileSelection ();
OS.memmove (selection, handle);
OS.gtk_file_selection_hide_fileop_buttons (handle);
int fileListParent = OS.gtk_widget_get_parent (selection.file_list);
OS.gtk_widget_hide (selection.file_list);
OS.gtk_widget_hide (fileListParent);
int response = OS.gtk_dialog_run (handle);
if (response == OS.GTK_RESPONSE_OK) {
int fileNamePtr = OS.gtk_file_selection_get_filename (handle);
int utf8Ptr = OS.g_filename_to_utf8 (fileNamePtr, -1, null, null, null);
int [] items_written = new int [1];
int utf16Ptr = OS.g_utf8_to_utf16 (utf8Ptr, -1, null, items_written, null);
int length = items_written [0];
char [] buffer = new char [length];
OS.memmove (buffer, utf16Ptr, length * 2);
String osAnswer = new String (buffer);
OS.g_free (utf16Ptr);
OS.g_free (utf8Ptr);
if (osAnswer != null) {
answer = osAnswer;
// add trailing separator if not already present
char separator = System.getProperty ("file.separator").charAt (0);
int separatorIndex = answer.lastIndexOf (separator);
if (separatorIndex != answer.length () - 1) answer += separator;
}
}
OS.gtk_widget_destroy (handle);
return answer;
}
/**
* Sets the path which the dialog will use to filter
* the directories it shows to the argument, which may be
* null.
*
* @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
*/
public void setMessage (String string) {
/*
* The native Gtk file selection dialog does not support message
* strings other than the dialog title. However, we maintain the set
* message so at least the application programs get back the same string.
*/
message = string;
}
}
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