mirror of git://gcc.gnu.org/git/gcc.git
516 lines
13 KiB
Java
516 lines
13 KiB
Java
/* Dialog.java -- An AWT dialog box
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Copyright (C) 1999, 2000, 2001, 2002 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 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.DialogPeer;
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/**
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* A dialog box widget class.
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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 Dialog extends Window
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{
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/*
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* Static Variables
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*/
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// Serialization constant
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private static final long serialVersionUID = 5920926903803293709L;
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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 Indicates whether or not this dialog box is modal.
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*/
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private boolean modal;
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/**
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* @serial Indicates whether or not this dialog box is resizable.
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*/
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private boolean resizable = true;
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/**
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* @serial The title string for this dialog box, which can be
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* <code>null</code>.
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*/
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private String title;
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/**
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* This field indicates whether the dialog is undecorated or not.
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*/
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private boolean undecorated = false;
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/**
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* Indicates that we are blocked for modality in show
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*/
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private boolean blocked = false;
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/**
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* Secondary EventQueue to handle AWT events while
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* we are blocked for modality in show
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*/
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private EventQueue eq2 = null;
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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>Dialog</code> with the specified
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* parent, that is resizable and not modal, and which has no title.
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*
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* @param parent The parent frame of this dialog box.
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*
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* @exception IllegalArgumentException If the owner's GraphicsConfiguration
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* is not from a screen device, or if owner is null. This exception is always
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* thrown when GraphicsEnvironment.isHeadless() returns true.
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*/
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public
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Dialog(Frame parent)
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{
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this(parent, "", false);
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}
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/*************************************************************************/
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified
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* parent and modality, that is resizable and which has no title.
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*
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* @param parent The parent frame of this dialog box.
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* @param modal <code>true</code> if this dialog box is modal,
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* <code>false</code> otherwise.
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*
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* @exception IllegalArgumentException If the owner's GraphicsConfiguration
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* is not from a screen device, or if owner is null. This exception is always
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* thrown when GraphicsEnvironment.isHeadless() returns true.
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*/
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public
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Dialog(Frame parent, boolean modal)
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{
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this(parent, "", modal);
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}
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/*************************************************************************/
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified
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* parent, that is resizable and not modal, and which has the specified
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* title.
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*
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* @param parent The parent frame of this dialog box.
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* @param title The title string for this dialog box.
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*
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* @exception IllegalArgumentException If the owner's GraphicsConfiguration
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* is not from a screen device, or if owner is null. This exception is always
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* thrown when GraphicsEnvironment.isHeadless() returns true.
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*/
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public
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Dialog(Frame parent, String title)
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{
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this(parent, title, false);
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}
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/*************************************************************************/
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified,
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* parent, title, and modality, that is resizable.
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*
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* @param parent The parent frame of this dialog box.
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* @param title The title string for this dialog box.
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* @param modal <code>true</code> if this dialog box is modal,
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* <code>false</code> otherwise.
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*
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* @exception IllegalArgumentException If owner is null or
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* GraphicsEnvironment.isHeadless() returns true.
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*/
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public
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Dialog(Frame parent, String title, boolean modal)
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{
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this (parent, title, modal, parent.getGraphicsConfiguration ());
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}
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified,
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* parent, title, modality and <code>GraphicsConfiguration</code>,
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* that is resizable.
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*
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* @param parent The parent frame of this dialog box.
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* @param title The title string for this dialog box.
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* @param modal <code>true</code> if this dialog box is modal,
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* <code>false</code> otherwise.
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* @param gc The <code>GraphicsConfiguration</code> object to use.
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*
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* @exception IllegalArgumentException If owner is null, the
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* GraphicsConfiguration is not a screen device or
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* GraphicsEnvironment.isHeadless() returns true.
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*
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* @since 1.4
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*/
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public
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Dialog (Frame parent, String title, boolean modal, GraphicsConfiguration gc)
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{
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super (parent, gc);
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// A null title is equivalent to an empty title
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this.title = (title != null) ? title : "";
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this.modal = modal;
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visible = false;
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setLayout(new BorderLayout());
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}
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified,
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* parent, that is resizable.
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*
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* @exception IllegalArgumentException If parent is null. This exception is
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* always thrown when GraphicsEnvironment.isHeadless() returns true.
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*
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* @since 1.2
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*/
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public
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Dialog (Dialog owner)
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{
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this (owner, "", false, owner.getGraphicsConfiguration ());
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}
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified,
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* parent and title, that is resizable.
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*
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* @exception IllegalArgumentException If parent is null. This exception is
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* always thrown when GraphicsEnvironment.isHeadless() returns true.
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*
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* @since 1.2
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*/
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public
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Dialog (Dialog owner, String title)
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{
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this (owner, title, false, owner.getGraphicsConfiguration ());
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}
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified,
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* parent, title and modality, that is resizable.
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*
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* @exception IllegalArgumentException If parent is null. This exception is
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* always thrown when GraphicsEnvironment.isHeadless() returns true.
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*
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* @since 1.2
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*/
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public
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Dialog (Dialog owner, String title, boolean modal)
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{
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this (owner, title, modal, owner.getGraphicsConfiguration ());
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}
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/**
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* Initializes a new instance of <code>Dialog</code> with the specified,
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* parent, title, modality and <code>GraphicsConfiguration</code>,
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* that is resizable.
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*
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* @exception IllegalArgumentException If parent is null, the
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* GraphicsConfiguration is not a screen device or
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* GraphicsEnvironment.isHeadless() returns true.
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*
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* @since 1.4
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*/
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public
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Dialog (Dialog parent, String title, boolean modal, GraphicsConfiguration gc)
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{
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super (parent, parent.getGraphicsConfiguration ());
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// A null title is equivalent to an empty title
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this.title = (title != null) ? title : "";
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this.modal = modal;
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visible = false;
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setLayout (new BorderLayout ());
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}
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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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* Returns the title of this dialog box.
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*
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* @return The title of this dialog box.
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*/
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public String
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getTitle()
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{
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return(title);
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}
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/*************************************************************************/
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/**
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* Sets the title of this dialog box to the specified string.
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*
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* @param title The new title.
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*/
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public synchronized void
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setTitle(String title)
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{
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// A null title is equivalent to an empty title
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this.title = (title != null) ? title : "";
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if (peer != null)
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{
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DialogPeer d = (DialogPeer) peer;
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d.setTitle (title);
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}
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}
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/*************************************************************************/
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/**
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* Tests whether or not this dialog box is modal.
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*
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* @return <code>true</code> if this dialog box is modal,
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* <code>false</code> otherwise.
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*/
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public boolean
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isModal()
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{
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return(modal);
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}
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/*************************************************************************/
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/**
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* Changes the modality of this dialog box. This can only be done before
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* the peer is created.
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*
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* @param modal <code>true</code> to make this dialog box modal,
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* <code>false</code> to make it non-modal.
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*/
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public void
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setModal(boolean modal)
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{
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this.modal = modal;
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}
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/*************************************************************************/
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/**
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* Tests whether or not this dialog box is resizable.
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*
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* @return <code>true</code> if this dialog is resizable, <code>false</code>,
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* otherwise.
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*/
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public boolean
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isResizable()
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{
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return(resizable);
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}
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/*************************************************************************/
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/**
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* Changes the resizability of this dialog box.
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*
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* @param resizable <code>true</code> to make this dialog resizable,
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* <code>false</code> to make it non-resizable.
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*/
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public synchronized void
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setResizable(boolean resizable)
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{
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this.resizable = resizable;
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if (peer != null)
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{
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DialogPeer d = (DialogPeer) peer;
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d.setResizable (resizable);
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}
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}
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/*************************************************************************/
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/**
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* Creates this object's native peer.
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*/
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public synchronized void
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addNotify()
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{
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if (peer == null)
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peer = getToolkit ().createDialog (this);
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super.addNotify ();
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}
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/*************************************************************************/
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/**
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* Makes this dialog visible and brings it to the front.
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* If the dialog is modal and is not already visible, this call will not
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* return until the dialog is hidden by someone calling hide or dispose.
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* If this is the event dispatching thread we must ensure that another event
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* thread runs while the one which invoked this method is blocked.
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*/
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public synchronized void
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show()
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{
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super.show();
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if (isModal())
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{
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// If already shown (and blocked) just return
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if (blocked)
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return;
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/* If show is called in the dispatch thread for a modal dialog it will
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block so we must run another thread so the events keep being
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dispatched.*/
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if (EventQueue.isDispatchThread ())
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{
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EventQueue eq = Toolkit.getDefaultToolkit().getSystemEventQueue();
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eq2 = new EventQueue ();
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eq.push (eq2);
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}
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try
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{
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blocked = true;
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wait ();
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blocked = false;
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}
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catch (InterruptedException e)
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{
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blocked = false;
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}
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if (eq2 != null)
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{
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eq2.pop ();
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eq2 = null;
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}
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}
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}
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/*************************************************************************/
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/**
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* Hides the Dialog and then
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* causes show() to return if it is currently blocked.
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*/
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public synchronized void
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hide ()
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{
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if (blocked)
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{
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notifyAll ();
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}
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super.hide();
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}
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/*************************************************************************/
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/**
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* Disposes the Dialog and then causes show() to return
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* if it is currently blocked.
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*/
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public synchronized void
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dispose ()
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{
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if (blocked)
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{
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notifyAll ();
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}
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super.dispose();
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}
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/*************************************************************************/
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/**
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* Returns a debugging string for this component.
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*
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* @return A debugging string for this component.
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*/
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protected String
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paramString()
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{
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return ("title+" + title + ",modal=" + modal +
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",resizable=" + resizable + "," + super.paramString());
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}
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/**
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* Returns whether this frame is undecorated or not.
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*
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* @since 1.4
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*/
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public boolean isUndecorated ()
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{
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return undecorated;
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}
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/**
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* Disables or enables decorations for this frame. This method can only be
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* called while the frame is not displayable.
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*
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* @exception IllegalComponentStateException If this frame is displayable.
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*
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* @since 1.4
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*/
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public void setUndecorated (boolean undecorated)
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{
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if (isDisplayable ())
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throw new IllegalComponentStateException ();
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this.undecorated = undecorated;
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}
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} // class Dialog
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