397 lines
9.6 KiB
Java
397 lines
9.6 KiB
Java
/* FileDialog.java -- A filename selection dialog box
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Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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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.Serializable;
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/**
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* This class implements a file selection dialog box widget.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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* @author Tom Tromey (tromey@redhat.com)
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*/
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public class FileDialog extends Dialog implements Serializable
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{
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/*
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* Static Variables
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*/
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/**
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* Indicates that the purpose of the dialog is for opening a file.
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*/
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public static final int LOAD = 0;
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/**
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* Indicates that the purpose of the dialog is for saving a file.
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*/
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public static final int SAVE = 1;
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// Serialization constant
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private static final long serialVersionUID = 5035145889651310422L;
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/*************************************************************************/
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/*
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* Instance Variables
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*/
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/**
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* @serial The directory for this file dialog.
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*/
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private String dir;
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/**
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* @serial The filename for this file dialog
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*/
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private String file;
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/**
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* @serial The filter for selecting filenames to display
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*/
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private FilenameFilter filter;
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/**
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* @serial The mode of this dialog, either <code>LOAD</code> or
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* <code>SAVE</code>.
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*/
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private int mode;
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/**
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* The number used to generate the name returned by getName.
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*/
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private static transient long next_file_dialog_number;
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/*************************************************************************/
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/*
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* Constructors
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*/
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/**
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* Initializes a new instance of <code>FileDialog</code> with the specified
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* parent. This dialog will have no title and will be for loading a file.
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*
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* @param parent The parent dialog for this.
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*
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* @since 1.5
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*/
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public FileDialog(Dialog parent)
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{
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this(parent, "", LOAD);
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}
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/**
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* Initialized a new instance of <code>FileDialog</code> with the
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* specified parent and title. This dialog will be for opening a file.
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*
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* @param parent The parent dialog for this.
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* @param title The title for this dialog.
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*
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* @since 1.5
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*/
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public FileDialog(Dialog parent, String title)
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{
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this(parent, title, LOAD);
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}
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/**
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* Initialized a new instance of <code>FileDialog</code> with the specified
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* parent, title, and mode.
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*
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* @param parent The parent dialog for this.
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* @param title The title for this dialog.
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* @param mode The mode of the dialog, either <code>LOAD</code> or
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* <code>SAVE</code>.
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* @throws IllegalArgumentException - if illegal mode, if
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* GraphicsEnvironment.isHeadless or if parent is null.
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*
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* @since 1.5
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*/
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public FileDialog(Dialog parent, String title, int mode)
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{
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super(parent, title, true);
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// Other IllegalArgumentException cases are taken care of in Window.java
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if (mode != LOAD && mode != SAVE)
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throw new IllegalArgumentException (
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"Mode argument must be either LOAD or SAVE");
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setMode(mode);
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}
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/**
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* Initializes a new instance of <code>FileDialog</code> with the
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* specified parent. This dialog will have no title and will be for
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* loading a file.
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*
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* @param parent The parent frame for this dialog.
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*/
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public
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FileDialog(Frame parent)
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{
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this(parent, "", LOAD);
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}
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/*************************************************************************/
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/**
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* Initialized a new instance of <code>FileDialog</code> with the
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* specified parent and title. This dialog will be for opening a file.
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*
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* @param parent The parent frame for this dialog.
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* @param title The title for this dialog.
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*/
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public
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FileDialog(Frame parent, String title)
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{
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this(parent, title, LOAD);
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}
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/*************************************************************************/
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/**
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* Initialized a new instance of <code>FileDialog</code> with the
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* specified parent, title, and mode.
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*
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* @param parent The parent frame for this dialog.
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* @param title The title for this dialog.
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* @param mode The mode of the dialog, either <code>LOAD</code> or
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* <code>SAVE</code>.
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*
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* @exception IllegalArgumentException If an illegal file dialog mode
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* is supplied.
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*/
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public
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FileDialog(Frame parent, String title, int mode)
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{
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super(parent, title, true);
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if ((mode != LOAD) && (mode != SAVE))
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throw new IllegalArgumentException (
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"Mode argument must be either LOAD or SAVE");
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setMode (mode);
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}
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/*************************************************************************/
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/*
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* Instance Methods
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*/
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/**
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* Returns the mode of this dialog, either <code>LOAD</code> or
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* <code>SAVE</code>.
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*
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* @return The mode of this dialog.
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*/
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public int
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getMode()
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{
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return(mode);
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}
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/*************************************************************************/
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/**
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* Sets the mode of this dialog to either <code>LOAD</code> or
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* <code>SAVE</code>. This method is only effective before the native
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* peer is created.
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*
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* @param mode The new mode of this file dialog.
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*
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* @exception IllegalArgumentException If an illegal file dialog mode
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* is supplied.
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*/
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public void
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setMode(int mode)
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{
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if ((mode != LOAD) && (mode != SAVE))
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throw new IllegalArgumentException("Bad mode: " + mode);
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this.mode = mode;
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}
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/*************************************************************************/
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/**
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* Returns the directory for this file dialog.
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*
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* @return The directory for this file dialog.
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*/
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public String
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getDirectory()
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{
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return(dir);
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}
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/*************************************************************************/
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/**
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* Sets the directory for this file dialog.
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*
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* @param dir The new directory for this file dialog.
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*/
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public synchronized void
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setDirectory(String dir)
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{
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this.dir = dir;
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if (peer != null)
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{
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FileDialogPeer f = (FileDialogPeer) peer;
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f.setDirectory (dir);
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}
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}
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/*************************************************************************/
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/**
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* Returns the file that is selected in this dialog.
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*
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* @return The file that is selected in this dialog.
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*/
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public String
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getFile()
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{
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return(file);
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}
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/*************************************************************************/
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/**
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* Sets the selected file for this dialog.
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*
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* @param file The selected file for this dialog.
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*/
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public synchronized void
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setFile(String file)
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{
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if ("".equals(file))
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this.file = null;
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else
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this.file = file;
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if (peer != null)
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{
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FileDialogPeer f = (FileDialogPeer) peer;
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f.setFile (file);
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}
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}
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/*************************************************************************/
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/**
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* Returns the filename filter being used by this dialog.
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*
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* @return The filename filter being used by this dialog.
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*/
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public FilenameFilter
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getFilenameFilter()
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{
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return(filter);
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}
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/*************************************************************************/
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/**
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* Sets the filename filter used by this dialog.
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*
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* @param filter The new filename filter for this file dialog box.
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*/
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public synchronized void
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setFilenameFilter(FilenameFilter filter)
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{
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this.filter = filter;
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if (peer != null)
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{
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FileDialogPeer f = (FileDialogPeer) peer;
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f.setFilenameFilter (filter);
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}
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}
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/*************************************************************************/
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/**
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* Creates the native peer for this file dialog box.
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*/
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public void
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addNotify()
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{
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if (peer == null)
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peer = getToolkit ().createFileDialog (this);
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super.addNotify ();
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}
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/*************************************************************************/
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/**
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* Returns a debugging string for this object.
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*
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* @return A debugging string for this object.
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*/
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protected String
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paramString()
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{
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return ("dir=" + dir + ",file=" + file +
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",mode=" + mode + "," + super.paramString());
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}
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/**
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* Generate a unique name for this <code>FileDialog</code>.
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*
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* @return A unique name for this <code>FileDialog</code>.
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*/
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String
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generateName()
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{
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return "filedlg" + getUniqueLong();
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}
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private static synchronized long
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getUniqueLong()
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{
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return next_file_dialog_number++;
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}
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} // class FileDialog
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