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| -rw-r--r-- | odk/examples/DevelopersGuide/OfficeDev/DesktopEnvironment/StatusView.java | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/odk/examples/DevelopersGuide/OfficeDev/DesktopEnvironment/StatusView.java b/odk/examples/DevelopersGuide/OfficeDev/DesktopEnvironment/StatusView.java new file mode 100644 index 000000000..92ae178ad --- /dev/null +++ b/odk/examples/DevelopersGuide/OfficeDev/DesktopEnvironment/StatusView.java @@ -0,0 +1,264 @@ +/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * The Contents of this file are made available subject to the terms of + * the BSD license. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Sun Microsystems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + *************************************************************************/ + +// __________ Imports __________ + +import java.awt.*; +import javax.swing.*; + +// __________ Implementation __________ + +/** + * Implement a view to show status information + * of currently loaded document of a document view. + * It uses separate listener threads to get this information + * and actualize it automatically, if frame broadcast changes of + * his contained document. + * Threads are necessary to prevent this view against deadlocks. + * These deadlocks can occur if a listener will be notified + * by the office in an "oneway" method and try to call back + * to the office by using a synchronous method. + * UNO must guarantee order of all these calls ... and if + * the source of arrived event holds a mutex and our synchronous + * call needs this mutex too => a deadlock occurs. + * Why? UNO had created a new thread for our synchronous call + * inside the office process and so exist different threads + * for this constellation. + * + */ +public class StatusView extends JPanel + implements IShutdownListener +{ + + + /** + * const + * These URL's describe available feature states. + */ + private static final String FEATUREURL_FONT = "slot:10007"; + private static final String FEATUREURL_SIZE = "slot:10015"; + private static final String FEATUREURL_BOLD = "slot:10009"; + private static final String FEATUREURL_ITALIC = "slot:10008"; + private static final String FEATUREURL_UNDERLINE = "slot:10014"; + + + + /** + * const + * These values are used to show current state of showed feature. + */ + private static final String FONT_OFF = "unknown" ; + private static final String SIZE_OFF = "0.0" ; + private static final String BOLD_OFF = "-" ; + private static final String ITALIC_OFF = "-" ; + private static final String UNDERLINE_OFF = "-" ; + + private static final String FONT_ON = "" ; + private static final String SIZE_ON = "" ; + private static final String BOLD_ON = "X" ; + private static final String ITALIC_ON = "X" ; + private static final String UNDERLINE_ON = "X" ; + + + + /** + * @member mlaFontValue shows status of font name + * @member mlaSizeValue shows status of font size + * @member mlaBoldValue shows status of font style bold + * @member mlaUnderlineValue shows status of font style underline + * @member mlaItalicValue shows status of font style italic + * + * @member maFontListener threadsafe(!) helper to listen for status event which describe font name + * @member maSizeListener threadsafe(!) helper to listen for status event which describe font size + * @member maBoldListener threadsafe(!) helper to listen for status event which describe font style bold + * @member maUnderlineListener threadsafe(!) helper to listen for status event which describe font style underline + * @member maItalicListener threadsafe(!) helper to listen for status event which describe font style italic + */ + private final JLabel m_laFontValue ; + private final JLabel m_laSizeValue ; + private final JLabel m_laBoldValue ; + private final JLabel m_laUnderlineValue ; + private final JLabel m_laItalicValue ; + + private StatusListener m_aFontListener ; + private StatusListener m_aSizeListener ; + private StatusListener m_aBoldListener ; + private StatusListener m_aUnderlineListener ; + private StatusListener m_aItalicListener ; + + + + /** + * ctor + * Create view controls on startup and initialize it with default values. + * Filling of view items can be done by special set-methods. + * We don't start listening here! see setFrame() for that ... + */ + StatusView() + { + this.setLayout(new GridBagLayout()); + + GridBagConstraints aConstraint = new GridBagConstraints(); + aConstraint.anchor = GridBagConstraints.NORTHWEST; + aConstraint.insets = new Insets(2,2,2,2); + aConstraint.gridy = 0; + aConstraint.gridx = 0; + + JLabel laFont = new JLabel("Font" ); + JLabel laSize = new JLabel("Size" ); + JLabel laBold = new JLabel("Bold" ); + JLabel laUnderline = new JLabel("Underline"); + JLabel laItalic = new JLabel("Italic" ); + + m_laFontValue = new JLabel(); + m_laSizeValue = new JLabel(); + m_laBoldValue = new JLabel(); + m_laUnderlineValue = new JLabel(); + m_laItalicValue = new JLabel(); + + aConstraint.gridx = 0; + this.add( laFont, aConstraint ); + aConstraint.gridx = 1; + this.add( m_laFontValue, aConstraint ); + + ++aConstraint.gridy; + + aConstraint.gridx = 0; + this.add( laSize, aConstraint ); + aConstraint.gridx = 1; + this.add( m_laSizeValue, aConstraint ); + + ++aConstraint.gridy; + + aConstraint.gridx = 0; + this.add( laSize, aConstraint ); + aConstraint.gridx = 1; + this.add( m_laSizeValue, aConstraint ); + + ++aConstraint.gridy; + + aConstraint.gridx = 0; + this.add( laBold, aConstraint ); + aConstraint.gridx = 1; + this.add( m_laBoldValue, aConstraint ); + + ++aConstraint.gridy; + + aConstraint.gridx = 0; + this.add( laUnderline, aConstraint ); + aConstraint.gridx = 1; + this.add( m_laUnderlineValue, aConstraint ); + + ++aConstraint.gridy; + + aConstraint.gridx = 0; + this.add( laItalic, aConstraint ); + aConstraint.gridx = 1; + this.add( m_laItalicValue, aConstraint ); + + m_laFontValue.setEnabled (false); + m_laSizeValue.setEnabled (false); + m_laBoldValue.setEnabled (false); + m_laItalicValue.setEnabled (false); + m_laUnderlineValue.setEnabled(false); + + m_laFontValue.setText (FONT_OFF ); + m_laSizeValue.setText (SIZE_OFF ); + m_laBoldValue.setText (BOLD_OFF ); + m_laItalicValue.setText (ITALIC_OFF ); + m_laUnderlineValue.setText(UNDERLINE_OFF); + } + + + + /* + * Set new frame for this view and start listening for events immediately. + * We create one status listener for every control we wish to update. + * And because the environment of the frame can be changed - these + * listener refresh himself internally for frame action events too. + * So we register it as such frame action listener only here. + * Rest is done automatically... + * + * @param xFrame + * will be used as source of possible status events + */ + public void setFrame(com.sun.star.frame.XFrame xFrame) + { + if (xFrame==null) + return; + + // create some listener on given frame for available status events + // Created listener instances will register themselves on this frame and + // show it received information automatically on set UI controls. + m_aFontListener = new StatusListener(m_laFontValue ,FONT_ON ,FONT_OFF ,xFrame, FEATUREURL_FONT ); + m_aSizeListener = new StatusListener(m_laSizeValue ,SIZE_ON ,SIZE_OFF ,xFrame, FEATUREURL_SIZE ); + m_aBoldListener = new StatusListener(m_laBoldValue ,BOLD_ON ,BOLD_OFF ,xFrame, FEATUREURL_BOLD ); + m_aItalicListener = new StatusListener(m_laItalicValue ,ITALIC_ON ,ITALIC_OFF ,xFrame, FEATUREURL_ITALIC ); + m_aUnderlineListener = new StatusListener(m_laUnderlineValue,UNDERLINE_ON,UNDERLINE_OFF,xFrame, FEATUREURL_UNDERLINE); + + m_aFontListener.startListening(); + m_aSizeListener.startListening(); + m_aBoldListener.startListening(); + m_aItalicListener.startListening(); + m_aUnderlineListener.startListening(); + } + + + + /** + * If this java application shutdown - we must cancel all current existing + * listener connections. Otherwise the office will run into some + * DisposedExceptions if it tries to use these forgotten listener references. + * And of course it can die doing that. + * We are registered at a central object to be informed if the VM will exit. + * So we can react. + */ + public void shutdown() + { + m_aFontListener.shutdown(); + m_aSizeListener.shutdown(); + m_aBoldListener.shutdown(); + m_aItalicListener.shutdown(); + m_aUnderlineListener.shutdown(); + + m_aFontListener = null; + m_aSizeListener = null; + m_aBoldListener = null; + m_aItalicListener = null; + m_aUnderlineListener = null; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |