Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 199 insertions, 0 deletions

diff --git a/odk/examples/DevelopersGuide/Forms/TableCellTextBinding.java b/odk/examples/DevelopersGuide/Forms/TableCellTextBinding.java
new file mode 100644
index 000000000..23a9e4226
--- /dev/null
+++ b/odk/examples/DevelopersGuide/Forms/TableCellTextBinding.java
@@ -0,0 +1,199 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   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 .
+ */
+import com.sun.star.uno.Type;
+import com.sun.star.uno.UnoRuntime;
+import com.sun.star.table.XCell;
+import com.sun.star.util.XModifyListener;
+import com.sun.star.text.XTextRange;
+
+/** a value binding to be connected to a form control
+
+    This binding synchronizes the text contained in a table cell (which you must
+    pass upon construction) to the text in an XBindableValue.
+
+    Well, in real it does not synchronize both directions. The ValueBinding
+    service has not much room for own activity: It allows notification of changes
+    in the own value, and it allows external instances to set the current value.
+
+    Note that we implement this binding as a separate thread, which is (more or
+    less permanently) polling for a new text at the cell. This is unfortunate, but
+    sadly the Writer table cells do not support actively notifying changes in their
+    content to other interested parties.
+*/
+public class TableCellTextBinding
+                extends     java.lang.Thread
+                implements  com.sun.star.form.binding.XValueBinding,
+                            com.sun.star.util.XModifyBroadcaster
+{
+    private XTextRange  m_cellText;
+    private Object      m_writeSignal;
+    private String      m_newCellText;
+    private String      m_lastKnownCellText;
+    private boolean     m_haveNewCellText;
+    private java.util.List<XModifyListener>  m_listeners;
+
+    /** Creates a new instance of TableCellTextBinding */
+    public TableCellTextBinding( XCell cell )
+    {
+        m_cellText = UnoRuntime.queryInterface( XTextRange.class, cell );
+
+        m_newCellText = "";
+        m_listeners = new java.util.LinkedList<XModifyListener>();
+
+        start();
+    }
+
+    /** retrieves the list of data types which this binding can exchange
+    */
+    public com.sun.star.uno.Type[] getSupportedValueTypes()
+    {
+        try
+        {
+            // well, only strings here ...
+            return new Type[] {
+                getStringType()
+            };
+        }
+        catch( java.lang.Exception e )
+        {
+        }
+        return new Type[] { };
+    }
+
+    /** retrieves the current value
+    */
+    public Object getValue(com.sun.star.uno.Type type) throws com.sun.star.form.binding.IncompatibleTypesException
+    {
+        if ( !type.equals( getStringType() ) )
+            throw new com.sun.star.form.binding.IncompatibleTypesException();
+
+        return m_cellText.getString();
+    }
+
+    /** sets a new value
+    */
+    public void setValue(Object obj) throws com.sun.star.form.binding.IncompatibleTypesException
+    {
+        String text;
+        try
+        {
+            text = (String)obj;
+        }
+        catch( java.lang.ClassCastException e )
+        {
+            throw new com.sun.star.form.binding.IncompatibleTypesException();
+        }
+        // remember the new text
+        synchronized( m_newCellText )
+        {
+            m_newCellText = text;
+            m_haveNewCellText = true;
+        }
+        // and wake up the thread which is waiting for it
+        synchronized( m_writeSignal )
+        {
+            m_writeSignal.notify();
+        }
+    }
+
+    /** determines whether a given value type is supported
+    */
+    public boolean supportsType(com.sun.star.uno.Type type)
+    {
+        return type.equals( getStringType() );
+    }
+
+    /** retrieves the UNO type for the string class
+    */
+    private static final Type getStringType()
+    {
+        return new com.sun.star.uno.Type( String.class );
+    }
+
+    /** runs the thread
+    */
+    @Override
+    public void run()
+    {
+        try
+        {
+            m_writeSignal = new Object();
+            while ( true )
+            {
+                // go sleep a while
+                synchronized( m_writeSignal )
+                {
+                    m_writeSignal.wait( 200 );
+                }
+
+                // if there's new text in the control, propagate it to the cell
+                synchronized ( m_newCellText )
+                {
+                    if ( m_haveNewCellText )
+                    {
+                        m_cellText.setString( m_newCellText );
+                        m_lastKnownCellText = m_newCellText;
+                    }
+                    m_haveNewCellText = false;
+                }
+
+                // if there's new text in the cell, propagate it to the control
+                String currentCellText = m_cellText.getString();
+                if ( !currentCellText.equals( m_lastKnownCellText ) )
+                {
+                    m_lastKnownCellText = currentCellText;
+                    // notify the modification
+                    synchronized( m_listeners )
+                    {
+                        com.sun.star.lang.EventObject eventSource = new com.sun.star.lang.EventObject( this );
+
+                        java.util.Iterator<XModifyListener> loop = m_listeners.iterator();
+                        while ( loop.hasNext() )
+                        {
+                            loop.next().modified( eventSource );
+                        }
+                    }
+                }
+            }
+        }
+        catch( java.lang.Exception e )
+        {
+            e.printStackTrace(System.err);
+        }
+    }
+
+    public void addModifyListener(com.sun.star.util.XModifyListener xModifyListener)
+    {
+        synchronized( m_listeners )
+        {
+            m_listeners.add( xModifyListener );
+        }
+    }
+
+    public void removeModifyListener(com.sun.star.util.XModifyListener xModifyListener)
+    {
+        synchronized( m_listeners )
+        {
+            m_listeners.remove( xModifyListener );
+        }
+    }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */