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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.
*
*************************************************************************/
/**************************************************************************/
import com.sun.star.uno.*;
import com.sun.star.beans.*;
import com.sun.star.form.*;
import com.sun.star.lang.*;
import com.sun.star.sdb.*;
import com.sun.star.task.*;
/**************************************************************************/
/** helper class for validating a grid field before it is updated
<p>Actually, the mechanism for validating the field is not restricted to
grid control fields. Instead, it can be used for any bound controls.</p>
*/
class GridFieldValidator implements XUpdateListener
{
private XComponentContext m_xCtx;
private XPropertySet m_xWatchedColumn;
private boolean m_bWatching;
/* ------------------------------------------------------------------ */
public GridFieldValidator( XComponentContext xCtx, XPropertySet xWatchedGridColumn )
{
// remember
m_xCtx = xCtx;
m_xWatchedColumn = xWatchedGridColumn;
DocumentHelper.getDocumentForComponent(xWatchedGridColumn,
xCtx);
m_bWatching = false;
}
/* ------------------------------------------------------------------ */
public void enableColumnWatch( boolean bEnable )
{
if ( bEnable == m_bWatching )
return;
XUpdateBroadcaster xUpdate = UnoRuntime.queryInterface(
XUpdateBroadcaster.class, m_xWatchedColumn );
if ( bEnable )
xUpdate.addUpdateListener( this );
else
xUpdate.removeUpdateListener( this );
m_bWatching = bEnable;
}
/* ------------------------------------------------------------------ */
/** shows a message that we can't do several things due to an implementation error
*/
private void showInvalidValueMessage( )
{
try
{
// build the message we want to show
String sMessage = "The column \"";
sMessage += FLTools.getLabel( m_xWatchedColumn );
sMessage += "\" is not allowed to contain empty strings.";
SQLContext aError = new SQLContext(
"Invalid Value Entered",
null,
"S1000",
0,
new Any( new Type(), null ),
sMessage
);
// instantiate an interaction handler who can handle SQLExceptions
XInteractionHandler xHandler = UnoRuntime.queryInterface(
XInteractionHandler.class,
m_xCtx.getServiceManager().createInstanceWithContext(
"com.sun.star.task.InteractionHandler", m_xCtx ) );
// create a new request and execute it
InteractionRequest aRequest = new InteractionRequest( aError );
xHandler.handle( aRequest );
}
catch( com.sun.star.uno.Exception e )
{
System.out.println(e);
e.printStackTrace();
}
}
/* ------------------------------------------------------------------ */
// XUpdateListener overridables
/* ------------------------------------------------------------------ */
public boolean approveUpdate( EventObject aEvent ) throws com.sun.star.uno.RuntimeException
{
boolean bApproved = true;
try
{
// the control model which fired the event
XPropertySet xSourceProps = UNO.queryPropertySet( aEvent.Source );
String sNewText = (String)xSourceProps.getPropertyValue( "Text" );
if ( 0 == sNewText.length() )
{
// say that the value is invalid
showInvalidValueMessage( );
bApproved = false;
// reset the control value
// for this, we take the current value from the row set field the control
// is bound to, and forward it to the control model
XColumn xBoundColumn = UNO.queryColumn( xSourceProps.getPropertyValue( "BoundField" ) );
if ( null != xBoundColumn )
{
xSourceProps.setPropertyValue( "Text", xBoundColumn.getString() );
}
}
}
catch( com.sun.star.uno.Exception e )
{
System.out.println(e);
e.printStackTrace();
}
return bApproved;
}
/* ------------------------------------------------------------------ */
public void updated( EventObject aEvent ) throws com.sun.star.uno.RuntimeException
{
}
/* ------------------------------------------------------------------ */
// XEventListener overridables
/* ------------------------------------------------------------------ */
public void disposing( EventObject aEvent )
{
// not interested in
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
