/* -*- 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.lang.*; import com.sun.star.container.*; import com.sun.star.beans.*; import com.sun.star.form.*; import com.sun.star.sdbc.*; /**************************************************************************/ /** A helper class for recursively locking control models which are bound to a specific field */ class LockControlModels extends ComponentTreeTraversal { private String m_sDataField; private Boolean m_aLockIt; private int m_nLevel; // nesting level relative to the form we started with /* ------------------------------------------------------------------ */ public LockControlModels( String sDataField, boolean bLockIt ) { m_sDataField = sDataField; m_aLockIt = Boolean.valueOf( bLockIt ); m_nLevel = 0; } /* ------------------------------------------------------------------ */ @Override protected boolean shouldStepInto( XIndexContainer xContainer ) { if ( !super.shouldStepInto( xContainer ) ) return false; // don't try to be more clever than our base class XForm xForm = UnoRuntime.queryInterface( XForm.class, xContainer ); if ( ( null != xForm ) && ( m_nLevel > 1 ) ) // don't step into sub forms - we only handle the form we were originally // applied to return false; return true; } /* ------------------------------------------------------------------ */ @Override public void handle( Object aFormComponent ) throws com.sun.star.uno.Exception { // entering this nesting level ++m_nLevel; // check if the component has a DataField property XPropertySet xCompProps = UNO.queryPropertySet( aFormComponent ); XPropertySetInfo xPSI = null; if ( null != xCompProps ) xPSI = xCompProps.getPropertySetInfo(); if ( ( null != xPSI ) && xPSI.hasPropertyByName( "DataField" ) ) { // indeed it has .... String sDataField = (String)xCompProps.getPropertyValue( "DataField" ); if ( sDataField.equals( m_sDataField ) ) { // we found a control model which is bound to what we're looking for xCompProps.setPropertyValue( "ReadOnly", m_aLockIt ); } } // allow the super class to step down, if possible super.handle( aFormComponent ); // leaving this nesting level --m_nLevel; } } /**************************************************************************/ /** a class which automatically handles control locking.
The class has to be bound to a form. Upon every movement of the form, all controls which are bound to a (to be specified) field are locked on existing and unlocked on new records.
*/ class ControlLock implements XRowSetListener { private XPropertySet m_xForm; private String m_sDataField; private boolean m_bLockingEnabled; private boolean m_bPreviousRoundLock; /* ------------------------------------------------------------------ */ ControlLock( XPropertySet xForm, String sBoundDataField ) { m_xForm = xForm; m_sDataField = sBoundDataField; m_bLockingEnabled = false; m_bPreviousRoundLock = false; } /* ------------------------------------------------------------------ */ /** updates the locks on the affected controls */ private void updateLocks( ) { try { // first determine if we need to lock Boolean aIsNewRecord = (Boolean)m_xForm.getPropertyValue( "IsNew" ); boolean bNeedLock = m_bLockingEnabled && !aIsNewRecord.booleanValue(); if ( m_bPreviousRoundLock != bNeedLock ) { LockControlModels aLocker = new LockControlModels( m_sDataField, bNeedLock ); aLocker.handle( m_xForm ); m_bPreviousRoundLock = bNeedLock; } // please note that we choose the expensive way here: We always loop through // _all_ control models belonging to the form. This clearly slows down the // whole process. // A better solution would be to cache the affected control models. Then we // could either rely on the fact that the model hierarchy is static, or we // could add ourself as container listener to the form. } catch(com.sun.star.uno.Exception e) { System.out.println(e); e.printStackTrace(); } } /* ------------------------------------------------------------------ */ /** enables the locking in generalIf the control models are really locked depends on the current record of the form: on the insert row, controls are never locked.
*/ public void enableLock( boolean bLock ) { // remember this new setting m_bLockingEnabled = bLock; // add or remove ourself as listener to get notified of cursor moves XRowSet xRowSet = UnoRuntime.queryInterface( XRowSet.class, m_xForm ); if ( m_bLockingEnabled ) { xRowSet.addRowSetListener( this ); } else { xRowSet.removeRowSetListener( this ); } // update the locks updateLocks(); } /* ================================================================== = UNO callbacks ================================================================== */ /* ------------------------------------------------------------------ */ // XResetListener overridables /* ------------------------------------------------------------------ */ public void cursorMoved( EventObject aEvent ) throws com.sun.star.uno.RuntimeException { updateLocks( ); } /* ------------------------------------------------------------------ */ public void rowChanged( EventObject aEvent ) throws com.sun.star.uno.RuntimeException { // not interested in } /* ------------------------------------------------------------------ */ public void rowSetChanged( EventObject aEvent ) throws com.sun.star.uno.RuntimeException { // not interested in } /* ------------------------------------------------------------------ */ // XEventListener overridables /* ------------------------------------------------------------------ */ public void disposing( EventObject aEvent ) { // not interested in } } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */