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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
commit940b4d1848e8c70ab7642901a68594e8016caffc (patch)
treeeb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /odk/examples/DevelopersGuide/OfficeDev/DesktopEnvironment/StatusView.java
parentInitial commit. (diff)
downloadlibreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.tar.xz
libreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.zip
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/* -*- 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: */