/************************************************************** * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * *************************************************************/ // __________ Imports __________ import com.sun.star.uno.UnoRuntime; import java.awt.*; import javax.swing.*; import java.lang.String; // __________ Implementation __________ /** * Implement a view to show status informations * of currently loaded document of a document view. * It use seperate listener threads to get this informations * and actualize it automaticly if frame broadcast changes of * his contained document. * Threads are neccessary to prevent this view against deadlocks. * These deadlocks can occure 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 occure. * Why? UNO had created a new thread for our synchronous call * inside the office process and so exist different threads * for this constallation. * * @author Andreas Schlüns * @created 20.06.2002 15:08 */ public class StatusView extends JPanel implements IShutdownListener { // ____________________ /** * const * These URL's describe available feature states. */ public static final String FEATUREURL_FONT = "slot:10007"; public static final String FEATUREURL_SIZE = "slot:10015"; public static final String FEATUREURL_BOLD = "slot:10009"; public static final String FEATUREURL_ITALIC = "slot:10008"; public static final String FEATUREURL_UNDERLINE = "slot:10014"; // ____________________ /** * const * These values are used to show current state of showed feature. */ public static final String FONT_OFF = "unknown" ; public static final String SIZE_OFF = "0.0" ; public static final String BOLD_OFF = "-" ; public static final String ITALIC_OFF = "-" ; public static final String UNDERLINE_OFF = "-" ; public static final String FONT_ON = "" ; public static final String SIZE_ON = "" ; public static final String BOLD_ON = "X" ; public static final String ITALIC_ON = "X" ; public 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 JLabel m_laFontValue ; private JLabel m_laSizeValue ; private JLabel m_laBoldValue ; private JLabel m_laUnderlineValue ; private 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 imedatly. * We create one status listener for every control we whish to update. * And because the environment of the frame can be changed - these * listener refresh himself internaly for frame action events too. * So we register it as such frame action listener only here. * Rest is done automaticly ... * * @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 herself on this frame and // show her received informations automaticly on setted 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. Otherwhise 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; } }