| /******************************************************************************* |
| * Copyright (c) 2000, 2012 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.win32.*; |
| 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 <em>not</em> intended to be subclassed. |
| * </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 = ""; //$NON-NLS-1$//$NON-NLS-2$ |
| String directoryPath; |
| |
| /** |
| * 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 (); |
| } |
| |
| long /*int*/ BrowseCallbackProc (long /*int*/ hwnd, long /*int*/ uMsg, long /*int*/ lParam, long /*int*/ lpData) { |
| switch ((int)/*64*/uMsg) { |
| case OS.BFFM_INITIALIZED: |
| if (filterPath != null && filterPath.length () != 0) { |
| /* Use the character encoding for the default locale */ |
| TCHAR buffer = new TCHAR (0, filterPath.replace ('/', '\\'), true); |
| OS.SendMessage (hwnd, OS.BFFM_SETSELECTION, 1, buffer); |
| } |
| if (title != null && title.length () != 0) { |
| /* Use the character encoding for the default locale */ |
| TCHAR buffer = new TCHAR (0, title, true); |
| OS.SetWindowText (hwnd, buffer); |
| } |
| break; |
| case OS.BFFM_VALIDATEFAILEDA: |
| case OS.BFFM_VALIDATEFAILEDW: |
| /* Use the character encoding for the default locale */ |
| int length = OS.IsUnicode ? OS.wcslen (lParam) : OS.strlen (lParam); |
| TCHAR buffer = new TCHAR (0, length); |
| int byteCount = buffer.length () * TCHAR.sizeof; |
| OS.MoveMemory (buffer, lParam, byteCount); |
| directoryPath = buffer.toString (0, length); |
| break; |
| } |
| return 0; |
| } |
| |
| /** |
| * 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 () { |
| if (OS.IsWinCE) error (SWT.ERROR_NOT_IMPLEMENTED); |
| |
| long /*int*/ hHeap = OS.GetProcessHeap (); |
| |
| /* Get the owner HWND for the dialog */ |
| long /*int*/ hwndOwner = 0; |
| if (parent != null) hwndOwner = parent.handle; |
| |
| /* Copy the message to OS memory */ |
| long /*int*/ lpszTitle = 0; |
| if (message.length () != 0) { |
| String string = message; |
| if (string.indexOf ('&') != -1) { |
| int length = string.length (); |
| char [] buffer = new char [length * 2]; |
| int index = 0; |
| for (int i=0; i<length; i++) { |
| char ch = string.charAt (i); |
| if (ch == '&') buffer [index++] = '&'; |
| buffer [index++] = ch; |
| } |
| string = new String (buffer, 0, index); |
| } |
| /* Use the character encoding for the default locale */ |
| TCHAR buffer = new TCHAR (0, string, true); |
| int byteCount = buffer.length () * TCHAR.sizeof; |
| lpszTitle = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, byteCount); |
| OS.MoveMemory (lpszTitle, buffer, byteCount); |
| } |
| |
| /* Create the BrowseCallbackProc */ |
| Callback callback = new Callback (this, "BrowseCallbackProc", 4); //$NON-NLS-1$ |
| long /*int*/ lpfn = callback.getAddress (); |
| if (lpfn == 0) error (SWT.ERROR_NO_MORE_CALLBACKS); |
| |
| /* Make the parent shell be temporary modal */ |
| Dialog oldModal = null; |
| Display display = parent.getDisplay (); |
| if ((style & (SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL)) != 0) { |
| oldModal = display.getModalDialog (); |
| display.setModalDialog (this); |
| } |
| |
| directoryPath = null; |
| BROWSEINFO lpbi = new BROWSEINFO (); |
| lpbi.hwndOwner = hwndOwner; |
| lpbi.lpszTitle = lpszTitle; |
| lpbi.ulFlags = OS.BIF_NEWDIALOGSTYLE | OS.BIF_RETURNONLYFSDIRS | OS.BIF_EDITBOX | OS.BIF_VALIDATE; |
| lpbi.lpfn = lpfn; |
| /* |
| * Bug in Windows. On some hardware configurations, SHBrowseForFolder() |
| * causes warning dialogs with the message "There is no disk in the drive |
| * Please insert a disk into \Device\Harddisk0\DR0". This is possibly |
| * caused by SHBrowseForFolder() calling internally GetVolumeInformation(). |
| * MSDN for GetVolumeInformation() says: |
| * |
| * "If you are attempting to obtain information about a floppy drive |
| * that does not have a floppy disk or a CD-ROM drive that does not |
| * have a compact disc, the system displays a message box asking the |
| * user to insert a floppy disk or a compact disc, respectively. |
| * To prevent the system from displaying this message box, call the |
| * SetErrorMode function with SEM_FAILCRITICALERRORS." |
| * |
| * The fix is to save and restore the error mode using SetErrorMode() |
| * with the SEM_FAILCRITICALERRORS flag around SHBrowseForFolder(). |
| */ |
| int oldErrorMode = OS.SetErrorMode (OS.SEM_FAILCRITICALERRORS); |
| |
| display.sendPreExternalEventDispatchEvent (); |
| /* |
| * Bug in Windows. When a WH_MSGFILTER hook is used to run code |
| * during the message loop for SHBrowseForFolder(), running code |
| * in the hook can cause a GP. Specifically, SetWindowText() |
| * for static controls seemed to make the problem happen. |
| * The fix is to disable async messages while the directory |
| * dialog is open. |
| * |
| * NOTE: This only happens in versions of the comctl32.dll |
| * earlier than 6.0. |
| */ |
| boolean oldRunMessages = display.runMessages; |
| if (OS.COMCTL32_MAJOR < 6) display.runMessages = false; |
| long /*int*/ lpItemIdList = OS.SHBrowseForFolder (lpbi); |
| if (OS.COMCTL32_MAJOR < 6) display.runMessages = oldRunMessages; |
| display.sendPostExternalEventDispatchEvent (); |
| OS.SetErrorMode (oldErrorMode); |
| |
| /* Clear the temporary dialog modal parent */ |
| if ((style & (SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL)) != 0) { |
| display.setModalDialog (oldModal); |
| } |
| |
| boolean success = lpItemIdList != 0; |
| if (success) { |
| /* Use the character encoding for the default locale */ |
| TCHAR buffer = new TCHAR (0, OS.MAX_PATH); |
| if (OS.SHGetPathFromIDList (lpItemIdList, buffer)) { |
| directoryPath = buffer.toString (0, buffer.strlen ()); |
| filterPath = directoryPath; |
| } |
| } |
| |
| /* Free the BrowseCallbackProc */ |
| callback.dispose (); |
| |
| /* Free the OS memory */ |
| if (lpszTitle != 0) OS.HeapFree (hHeap, 0, lpszTitle); |
| |
| /* Free the pointer to the ITEMIDLIST */ |
| long /*int*/ [] ppMalloc = new long /*int*/ [1]; |
| if (OS.SHGetMalloc (ppMalloc) == OS.S_OK) { |
| /* void Free (struct IMalloc *this, void *pv); */ |
| OS.VtblCall (5, ppMalloc [0], lpItemIdList); |
| } |
| |
| /* |
| * This code is intentionally commented. On some |
| * platforms, the owner window is repainted right |
| * away when a dialog window exits. This behavior |
| * is currently unspecified. |
| */ |
| // if (hwndOwner != 0) OS.UpdateWindow (hwndOwner); |
| |
| /* Return the directory path */ |
| if (!success) return null; |
| return directoryPath; |
| } |
| |
| /** |
| * 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; |
| } |
| |
| } |