author | darcy |
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changeset 58309 | c6f8b2c3dc66 |
parent 54871 | c2e4aef5edf2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1995, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.awt; |
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import java.awt.peer.FileDialogPeer; |
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import java.io.FilenameFilter; |
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import java.io.IOException; |
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import java.io.ObjectInputStream; |
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import java.io.File; |
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import sun.awt.AWTAccessor; |
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/** |
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* The {@code FileDialog} class displays a dialog window |
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* from which the user can select a file. |
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* <p> |
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* Since it is a modal dialog, when the application calls |
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* its {@code show} method to display the dialog, |
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* it blocks the rest of the application until the user has |
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* chosen a file. |
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* |
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* @see Window#show |
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* |
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* @author Sami Shaio |
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* @author Arthur van Hoff |
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* @since 1.0 |
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*/ |
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public class FileDialog extends Dialog { |
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/** |
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* This constant value indicates that the purpose of the file |
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* dialog window is to locate a file from which to read. |
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*/ |
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public static final int LOAD = 0; |
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/** |
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* This constant value indicates that the purpose of the file |
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* dialog window is to locate a file to which to write. |
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*/ |
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public static final int SAVE = 1; |
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/* |
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* There are two {@code FileDialog} modes: {@code LOAD} and |
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* {@code SAVE}. |
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* This integer will represent one or the other. |
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* If the mode is not specified it will default to {@code LOAD}. |
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* |
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* @serial |
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* @see getMode() |
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* @see setMode() |
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* @see java.awt.FileDialog#LOAD |
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* @see java.awt.FileDialog#SAVE |
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*/ |
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int mode; |
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/* |
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* The string specifying the directory to display |
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* in the file dialog. This variable may be {@code null}. |
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* |
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* @serial |
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* @see getDirectory() |
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* @see setDirectory() |
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*/ |
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String dir; |
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/* |
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* The string specifying the initial value of the |
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* filename text field in the file dialog. |
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* This variable may be {@code null}. |
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* |
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* @serial |
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* @see getFile() |
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* @see setFile() |
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*/ |
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String file; |
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/** |
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* Contains the File instances for all the files that the user selects. |
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* |
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* @serial |
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* @see #getFiles |
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* @since 1.7 |
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*/ |
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private File[] files; |
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/** |
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* Represents whether the file dialog allows the multiple file selection. |
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* |
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* @serial |
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* @see #setMultipleMode |
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* @see #isMultipleMode |
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* @since 1.7 |
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*/ |
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private boolean multipleMode = false; |
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/* |
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* The filter used as the file dialog's filename filter. |
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* The file dialog will only be displaying files whose |
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* names are accepted by this filter. |
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* This variable may be {@code null}. |
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* |
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* @serial |
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* @see #getFilenameFilter() |
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* @see #setFilenameFilter() |
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* @see FileNameFilter |
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*/ |
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@SuppressWarnings("serial") // Not statically typed as Serializable |
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FilenameFilter filter; |
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private static final String base = "filedlg"; |
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private static int nameCounter = 0; |
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/* |
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* JDK 1.1 serialVersionUID |
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*/ |
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private static final long serialVersionUID = 5035145889651310422L; |
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static { |
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/* ensure that the necessary native libraries are loaded */ |
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Toolkit.loadLibraries(); |
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if (!GraphicsEnvironment.isHeadless()) { |
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initIDs(); |
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} |
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} |
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static { |
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AWTAccessor.setFileDialogAccessor( |
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new AWTAccessor.FileDialogAccessor() { |
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public void setFiles(FileDialog fileDialog, File[] files) { |
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fileDialog.setFiles(files); |
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} |
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public void setFile(FileDialog fileDialog, String file) { |
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fileDialog.file = ("".equals(file)) ? null : file; |
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} |
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public void setDirectory(FileDialog fileDialog, String directory) { |
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fileDialog.dir = ("".equals(directory)) ? null : directory; |
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} |
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public boolean isMultipleMode(FileDialog fileDialog) { |
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synchronized (fileDialog.getObjectLock()) { |
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return fileDialog.multipleMode; |
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} |
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} |
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}); |
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} |
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/** |
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* Initialize JNI field and method IDs for fields that may be |
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accessed from C. |
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*/ |
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private static native void initIDs(); |
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/** |
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* Creates a file dialog for loading a file. The title of the |
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* file dialog is initially empty. This is a convenience method for |
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* {@code FileDialog(parent, "", LOAD)}. |
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* <p> |
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* <strong>Note:</strong> Some platforms may not support |
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* showing the user-specified title in a file dialog. |
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* In this situation, either no title will be displayed in the file dialog's |
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* title bar or, on some systems, the file dialog's title bar will not be |
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* displayed. |
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* |
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* @param parent the owner of the dialog |
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* @since 1.1 |
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*/ |
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public FileDialog(Frame parent) { |
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this(parent, "", LOAD); |
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} |
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/** |
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* Creates a file dialog window with the specified title for loading |
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* a file. The files shown are those in the current directory. |
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* This is a convenience method for |
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* {@code FileDialog(parent, title, LOAD)}. |
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* <p> |
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* <strong>Note:</strong> Some platforms may not support |
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* showing the user-specified title in a file dialog. |
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* In this situation, either no title will be displayed in the file dialog's |
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* title bar or, on some systems, the file dialog's title bar will not be |
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* displayed. |
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* |
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* @param parent the owner of the dialog |
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* @param title the title of the dialog |
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*/ |
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public FileDialog(Frame parent, String title) { |
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this(parent, title, LOAD); |
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} |
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/** |
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* Creates a file dialog window with the specified title for loading |
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* or saving a file. |
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* <p> |
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* If the value of {@code mode} is {@code LOAD}, then the |
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* file dialog is finding a file to read, and the files shown are those |
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* in the current directory. If the value of |
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* {@code mode} is {@code SAVE}, the file dialog is finding |
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* a place to write a file. |
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* <p> |
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* <strong>Note:</strong> Some platforms may not support |
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* showing the user-specified title in a file dialog. |
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* In this situation, either no title will be displayed in the file dialog's |
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* title bar or, on some systems, the file dialog's title bar will not be |
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* displayed. |
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* |
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* @param parent the owner of the dialog |
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* @param title the title of the dialog |
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* @param mode the mode of the dialog; either |
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* {@code FileDialog.LOAD} or {@code FileDialog.SAVE} |
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* @exception IllegalArgumentException if an illegal file |
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* dialog mode is supplied |
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* @see java.awt.FileDialog#LOAD |
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* @see java.awt.FileDialog#SAVE |
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*/ |
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public FileDialog(Frame parent, String title, int mode) { |
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super(parent, title, true); |
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this.setMode(mode); |
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setLayout(null); |
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} |
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/** |
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* Creates a file dialog for loading a file. The title of the |
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* file dialog is initially empty. This is a convenience method for |
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* {@code FileDialog(parent, "", LOAD)}. |
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* <p> |
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* <strong>Note:</strong> Some platforms may not support |
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* showing the user-specified title in a file dialog. |
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* In this situation, either no title will be displayed in the file dialog's |
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* title bar or, on some systems, the file dialog's title bar will not be |
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* displayed. |
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* |
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* @param parent the owner of the dialog |
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* @exception java.lang.IllegalArgumentException if the {@code parent}'s |
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* {@code GraphicsConfiguration} |
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* is not from a screen device; |
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* @exception java.lang.IllegalArgumentException if {@code parent} |
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* is {@code null}; this exception is always thrown when |
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* {@code GraphicsEnvironment.isHeadless} |
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* returns {@code true} |
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* @see java.awt.GraphicsEnvironment#isHeadless |
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* @since 1.5 |
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*/ |
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public FileDialog(Dialog parent) { |
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this(parent, "", LOAD); |
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} |
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/** |
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* Creates a file dialog window with the specified title for loading |
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* a file. The files shown are those in the current directory. |
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* This is a convenience method for |
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* {@code FileDialog(parent, title, LOAD)}. |
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* <p> |
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* <strong>Note:</strong> Some platforms may not support |
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* showing the user-specified title in a file dialog. |
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* In this situation, either no title will be displayed in the file dialog's |
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* title bar or, on some systems, the file dialog's title bar will not be |
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* displayed. |
2 | 279 |
* |
280 |
* @param parent the owner of the dialog |
|
35667 | 281 |
* @param title the title of the dialog; a {@code null} value |
2 | 282 |
* will be accepted without causing a |
35667 | 283 |
* {@code NullPointerException} to be thrown |
284 |
* @exception java.lang.IllegalArgumentException if the {@code parent}'s |
|
285 |
* {@code GraphicsConfiguration} |
|
2 | 286 |
* is not from a screen device; |
35667 | 287 |
* @exception java.lang.IllegalArgumentException if {@code parent} |
288 |
* is {@code null}; this exception is always thrown when |
|
289 |
* {@code GraphicsEnvironment.isHeadless} |
|
290 |
* returns {@code true} |
|
2 | 291 |
* @see java.awt.GraphicsEnvironment#isHeadless |
292 |
* @since 1.5 |
|
293 |
*/ |
|
294 |
public FileDialog(Dialog parent, String title) { |
|
295 |
this(parent, title, LOAD); |
|
296 |
} |
|
297 |
||
298 |
/** |
|
299 |
* Creates a file dialog window with the specified title for loading |
|
300 |
* or saving a file. |
|
301 |
* <p> |
|
35667 | 302 |
* If the value of {@code mode} is {@code LOAD}, then the |
2 | 303 |
* file dialog is finding a file to read, and the files shown are those |
304 |
* in the current directory. If the value of |
|
35667 | 305 |
* {@code mode} is {@code SAVE}, the file dialog is finding |
2 | 306 |
* a place to write a file. |
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* <p> |
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* <strong>Note:</strong> Some platforms may not support |
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* showing the user-specified title in a file dialog. |
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* In this situation, either no title will be displayed in the file dialog's |
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* title bar or, on some systems, the file dialog's title bar will not be |
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* displayed. |
2 | 313 |
* |
314 |
* @param parent the owner of the dialog |
|
35667 | 315 |
* @param title the title of the dialog; a {@code null} value |
2 | 316 |
* will be accepted without causing a |
35667 | 317 |
* {@code NullPointerException} to be thrown |
2 | 318 |
* @param mode the mode of the dialog; either |
35667 | 319 |
* {@code FileDialog.LOAD} or {@code FileDialog.SAVE} |
2 | 320 |
* @exception java.lang.IllegalArgumentException if an illegal |
321 |
* file dialog mode is supplied; |
|
35667 | 322 |
* @exception java.lang.IllegalArgumentException if the {@code parent}'s |
323 |
* {@code GraphicsConfiguration} |
|
2 | 324 |
* is not from a screen device; |
35667 | 325 |
* @exception java.lang.IllegalArgumentException if {@code parent} |
326 |
* is {@code null}; this exception is always thrown when |
|
327 |
* {@code GraphicsEnvironment.isHeadless} |
|
328 |
* returns {@code true} |
|
2 | 329 |
* @see java.awt.GraphicsEnvironment#isHeadless |
330 |
* @see java.awt.FileDialog#LOAD |
|
331 |
* @see java.awt.FileDialog#SAVE |
|
332 |
* @since 1.5 |
|
333 |
*/ |
|
334 |
public FileDialog(Dialog parent, String title, int mode) { |
|
335 |
super(parent, title, true); |
|
336 |
this.setMode(mode); |
|
337 |
setLayout(null); |
|
338 |
} |
|
339 |
||
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340 |
|
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341 |
/** |
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342 |
* {@inheritDoc} |
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* <p> |
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344 |
* <strong>Note:</strong> Some platforms may not support |
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* showing the user-specified title in a file dialog. |
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* In this situation, either no title will be displayed in the file dialog's |
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* title bar or, on some systems, the file dialog's title bar will not be |
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* displayed. |
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349 |
*/ |
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350 |
@Override |
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351 |
public void setTitle(String title) { |
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super.setTitle(title); |
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353 |
} |
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354 |
|
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355 |
|
2 | 356 |
/** |
35667 | 357 |
* Constructs a name for this component. Called by {@code getName()} |
358 |
* when the name is {@code null}. |
|
2 | 359 |
*/ |
360 |
String constructComponentName() { |
|
361 |
synchronized (FileDialog.class) { |
|
362 |
return base + nameCounter++; |
|
363 |
} |
|
364 |
} |
|
365 |
||
366 |
/** |
|
367 |
* Creates the file dialog's peer. The peer allows us to change the look |
|
368 |
* of the file dialog without changing its functionality. |
|
369 |
*/ |
|
370 |
public void addNotify() { |
|
371 |
synchronized(getTreeLock()) { |
|
30469 | 372 |
if (parent != null && parent.peer == null) { |
2 | 373 |
parent.addNotify(); |
374 |
} |
|
375 |
if (peer == null) |
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peer = getComponentFactory().createFileDialog(this); |
2 | 377 |
super.addNotify(); |
378 |
} |
|
379 |
} |
|
380 |
||
381 |
/** |
|
382 |
* Indicates whether this file dialog box is for loading from a file |
|
383 |
* or for saving to a file. |
|
384 |
* |
|
385 |
* @return the mode of this file dialog window, either |
|
35667 | 386 |
* {@code FileDialog.LOAD} or |
387 |
* {@code FileDialog.SAVE} |
|
2 | 388 |
* @see java.awt.FileDialog#LOAD |
389 |
* @see java.awt.FileDialog#SAVE |
|
390 |
* @see java.awt.FileDialog#setMode |
|
391 |
*/ |
|
392 |
public int getMode() { |
|
393 |
return mode; |
|
394 |
} |
|
395 |
||
396 |
/** |
|
35667 | 397 |
* Sets the mode of the file dialog. If {@code mode} is not |
398 |
* a legal value, an exception will be thrown and {@code mode} |
|
2 | 399 |
* will not be set. |
400 |
* |
|
401 |
* @param mode the mode for this file dialog, either |
|
35667 | 402 |
* {@code FileDialog.LOAD} or |
403 |
* {@code FileDialog.SAVE} |
|
2 | 404 |
* @see java.awt.FileDialog#LOAD |
405 |
* @see java.awt.FileDialog#SAVE |
|
406 |
* @see java.awt.FileDialog#getMode |
|
407 |
* @exception IllegalArgumentException if an illegal file |
|
408 |
* dialog mode is supplied |
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409 |
* @since 1.1 |
2 | 410 |
*/ |
411 |
public void setMode(int mode) { |
|
412 |
switch (mode) { |
|
413 |
case LOAD: |
|
414 |
case SAVE: |
|
415 |
this.mode = mode; |
|
416 |
break; |
|
417 |
default: |
|
418 |
throw new IllegalArgumentException("illegal file dialog mode"); |
|
419 |
} |
|
420 |
} |
|
421 |
||
422 |
/** |
|
423 |
* Gets the directory of this file dialog. |
|
424 |
* |
|
35667 | 425 |
* @return the (potentially {@code null} or invalid) |
426 |
* directory of this {@code FileDialog} |
|
2 | 427 |
* @see java.awt.FileDialog#setDirectory |
428 |
*/ |
|
429 |
public String getDirectory() { |
|
430 |
return dir; |
|
431 |
} |
|
432 |
||
433 |
/** |
|
434 |
* Sets the directory of this file dialog window to be the |
|
35667 | 435 |
* specified directory. Specifying a {@code null} or an |
2 | 436 |
* invalid directory implies an implementation-defined default. |
437 |
* This default will not be realized, however, until the user |
|
35667 | 438 |
* has selected a file. Until this point, {@code getDirectory()} |
2 | 439 |
* will return the value passed into this method. |
440 |
* <p> |
|
441 |
* Specifying "" as the directory is exactly equivalent to |
|
35667 | 442 |
* specifying {@code null} as the directory. |
2 | 443 |
* |
444 |
* @param dir the specified directory |
|
445 |
* @see java.awt.FileDialog#getDirectory |
|
446 |
*/ |
|
447 |
public void setDirectory(String dir) { |
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448 |
this.dir = (dir != null && dir.isEmpty()) ? null : dir; |
2 | 449 |
FileDialogPeer peer = (FileDialogPeer)this.peer; |
450 |
if (peer != null) { |
|
451 |
peer.setDirectory(this.dir); |
|
452 |
} |
|
453 |
} |
|
454 |
||
455 |
/** |
|
456 |
* Gets the selected file of this file dialog. If the user |
|
35667 | 457 |
* selected {@code CANCEL}, the returned file is {@code null}. |
2 | 458 |
* |
459 |
* @return the currently selected file of this file dialog window, |
|
35667 | 460 |
* or {@code null} if none is selected |
2 | 461 |
* @see java.awt.FileDialog#setFile |
462 |
*/ |
|
463 |
public String getFile() { |
|
464 |
return file; |
|
465 |
} |
|
466 |
||
467 |
/** |
|
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468 |
* Returns files that the user selects. |
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|
469 |
* <p> |
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470 |
* If the user cancels the file dialog, |
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* then the method returns an empty array. |
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472 |
* |
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473 |
* @return files that the user selects or an empty array |
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|
474 |
* if the user cancels the file dialog. |
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|
475 |
* @see #setFile(String) |
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|
476 |
* @see #getFile |
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|
477 |
* @since 1.7 |
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|
478 |
*/ |
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|
479 |
public File[] getFiles() { |
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|
480 |
synchronized (getObjectLock()) { |
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|
481 |
if (files != null) { |
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|
482 |
return files.clone(); |
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|
483 |
} else { |
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|
484 |
return new File[0]; |
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|
485 |
} |
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|
486 |
} |
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|
487 |
} |
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|
488 |
|
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|
489 |
/** |
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|
490 |
* Stores the names of all the files that the user selects. |
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|
491 |
* |
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|
492 |
* Note that the method is private and it's intended to be used |
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|
493 |
* by the peers through the AWTAccessor API. |
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|
494 |
* |
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|
495 |
* @param files the array that contains the short names of |
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|
496 |
* all the files that the user selects. |
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|
497 |
* |
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|
498 |
* @see #getFiles |
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|
499 |
* @since 1.7 |
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|
500 |
*/ |
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|
501 |
private void setFiles(File[] files) { |
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|
502 |
synchronized (getObjectLock()) { |
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503 |
this.files = files; |
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504 |
} |
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505 |
} |
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506 |
|
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|
507 |
/** |
2 | 508 |
* Sets the selected file for this file dialog window to be the |
509 |
* specified file. This file becomes the default file if it is set |
|
510 |
* before the file dialog window is first shown. |
|
511 |
* <p> |
|
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|
512 |
* When the dialog is shown, the specified file is selected. The kind of |
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|
513 |
* selection depends on the file existence, the dialog type, and the native |
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|
514 |
* platform. E.g., the file could be highlighted in the file list, or a |
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|
515 |
* file name editbox could be populated with the file name. |
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|
516 |
* <p> |
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|
517 |
* This method accepts either a full file path, or a file name with an |
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|
518 |
* extension if used together with the {@code setDirectory} method. |
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|
519 |
* <p> |
2 | 520 |
* Specifying "" as the file is exactly equivalent to specifying |
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|
521 |
* {@code null} as the file. |
2 | 522 |
* |
523 |
* @param file the file being set |
|
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|
524 |
* @see #getFile |
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|
525 |
* @see #getFiles |
2 | 526 |
*/ |
527 |
public void setFile(String file) { |
|
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|
528 |
this.file = (file != null && file.isEmpty()) ? null : file; |
2 | 529 |
FileDialogPeer peer = (FileDialogPeer)this.peer; |
530 |
if (peer != null) { |
|
531 |
peer.setFile(this.file); |
|
532 |
} |
|
533 |
} |
|
534 |
||
535 |
/** |
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* Enables or disables multiple file selection for the file dialog. |
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* |
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* @param enable if {@code true}, multiple file selection is enabled; |
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* {@code false} - disabled. |
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* @see #isMultipleMode |
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* @since 1.7 |
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*/ |
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543 |
public void setMultipleMode(boolean enable) { |
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synchronized (getObjectLock()) { |
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this.multipleMode = enable; |
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} |
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} |
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548 |
|
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/** |
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* Returns whether the file dialog allows the multiple file selection. |
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* |
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* @return {@code true} if the file dialog allows the multiple |
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* file selection; {@code false} otherwise. |
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* @see #setMultipleMode |
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* @since 1.7 |
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556 |
*/ |
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public boolean isMultipleMode() { |
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synchronized (getObjectLock()) { |
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559 |
return multipleMode; |
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} |
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} |
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562 |
|
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563 |
/** |
2 | 564 |
* Determines this file dialog's filename filter. A filename filter |
565 |
* allows the user to specify which files appear in the file dialog |
|
566 |
* window. Filename filters do not function in Sun's reference |
|
567 |
* implementation for Microsoft Windows. |
|
568 |
* |
|
569 |
* @return this file dialog's filename filter |
|
570 |
* @see java.io.FilenameFilter |
|
571 |
* @see java.awt.FileDialog#setFilenameFilter |
|
572 |
*/ |
|
573 |
public FilenameFilter getFilenameFilter() { |
|
574 |
return filter; |
|
575 |
} |
|
576 |
||
577 |
/** |
|
578 |
* Sets the filename filter for this file dialog window to the |
|
579 |
* specified filter. |
|
580 |
* Filename filters do not function in Sun's reference |
|
581 |
* implementation for Microsoft Windows. |
|
582 |
* |
|
583 |
* @param filter the specified filter |
|
584 |
* @see java.io.FilenameFilter |
|
585 |
* @see java.awt.FileDialog#getFilenameFilter |
|
586 |
*/ |
|
587 |
public synchronized void setFilenameFilter(FilenameFilter filter) { |
|
588 |
this.filter = filter; |
|
589 |
FileDialogPeer peer = (FileDialogPeer)this.peer; |
|
590 |
if (peer != null) { |
|
591 |
peer.setFilenameFilter(filter); |
|
592 |
} |
|
593 |
} |
|
594 |
||
595 |
/** |
|
35667 | 596 |
* Reads the {@code ObjectInputStream} and performs |
2 | 597 |
* a backwards compatibility check by converting |
35667 | 598 |
* either a {@code dir} or a {@code file} |
599 |
* equal to an empty string to {@code null}. |
|
2 | 600 |
* |
35667 | 601 |
* @param s the {@code ObjectInputStream} to read |
2 | 602 |
*/ |
603 |
private void readObject(ObjectInputStream s) |
|
604 |
throws ClassNotFoundException, IOException |
|
605 |
{ |
|
606 |
s.defaultReadObject(); |
|
607 |
||
608 |
// 1.1 Compatibility: "" is not converted to null in 1.1 |
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if (dir != null && dir.isEmpty()) { |
2 | 610 |
dir = null; |
611 |
} |
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612 |
if (file != null && file.isEmpty()) { |
2 | 613 |
file = null; |
614 |
} |
|
615 |
} |
|
616 |
||
617 |
/** |
|
35667 | 618 |
* Returns a string representing the state of this {@code FileDialog} |
2 | 619 |
* window. This method is intended to be used only for debugging purposes, |
620 |
* and the content and format of the returned string may vary between |
|
621 |
* implementations. The returned string may be empty but may not be |
|
35667 | 622 |
* {@code null}. |
2 | 623 |
* |
624 |
* @return the parameter string of this file dialog window |
|
625 |
*/ |
|
626 |
protected String paramString() { |
|
627 |
String str = super.paramString(); |
|
628 |
str += ",dir= " + dir; |
|
629 |
str += ",file= " + file; |
|
630 |
return str + ((mode == LOAD) ? ",load" : ",save"); |
|
631 |
} |
|
632 |
||
633 |
boolean postsOldMouseEvents() { |
|
634 |
return false; |
|
635 |
} |
|
636 |
} |