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Diffstat (limited to 'odk/examples/DevelopersGuide/Forms/ComponentTreeTraversal.java')
| -rw-r--r-- | odk/examples/DevelopersGuide/Forms/ComponentTreeTraversal.java | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/odk/examples/DevelopersGuide/Forms/ComponentTreeTraversal.java b/odk/examples/DevelopersGuide/Forms/ComponentTreeTraversal.java new file mode 100644 index 000000000000..60f46b54eca1 --- /dev/null +++ b/odk/examples/DevelopersGuide/Forms/ComponentTreeTraversal.java @@ -0,0 +1,91 @@ +/************************************************************************* + * + * 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.container.*; +import com.sun.star.lang.*; + +/**************************************************************************/ +/** an abstract interface for components doing an action on a form component +*/ +interface IFormComponentAction +{ + public abstract void handle( Object aFormComponent ) throws java.lang.Exception; +}; + +/**************************************************************************/ +/** a helper class for travelling a form component tree +*/ +class ComponentTreeTraversal implements IFormComponentAction +{ + /* ------------------------------------------------------------------ */ + /** Indicator method to decide wether to step down the tree. + + <p>The default implementation checks if the container given is a grid + control model or a <service scope="com.sun.star.form">FormComponents</service> + instance.</p> + */ + protected boolean shouldStepInto( XIndexContainer xContainer ) throws com.sun.star.uno.Exception + { + // step down the tree, if possible + XServiceInfo xSI = UNO.queryServiceInfo( xContainer ); + if ( null != xSI + && ( xSI.supportsService( "com.sun.star.form.FormComponents" ) + || xSI.supportsService( "com.sun.star.form.component.GridControl" ) + ) + ) + { + return true; + } + else + { + return false; + } + } + /* ------------------------------------------------------------------ */ + public void handle( Object aFormComponent ) throws com.sun.star.uno.Exception + { + XIndexContainer xCont = UNO.queryIndexContainer( aFormComponent ); + if ( ( null != xCont ) + && shouldStepInto( xCont ) + ) + { + for ( int i=0; i<xCont.getCount(); ++i ) + { + handle( xCont.getByIndex( i ) ); + } + } + } +} + |