58 lines
1.9 KiB
Java
58 lines
1.9 KiB
Java
import com.sun.star.uno.*;
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import com.sun.star.container.*;
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import com.sun.star.lang.*;
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/**************************************************************************/
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/** an abstract interface for components doing an action on a form component
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*/
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interface IFormComponentAction
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{
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public abstract void handle( Object aFormComponent ) throws java.lang.Exception;
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};
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/**************************************************************************/
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/** a helper class for travelling a form component tree
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*/
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class ComponentTreeTraversal implements IFormComponentAction
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{
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/* ------------------------------------------------------------------ */
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/** Indicator method to decide wether to step down the tree.
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<p>The default implementation checks if the container given is a grid
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control model or a <service scope="com.sun.star.form">FormComponents</service>
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instance.</p>
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*/
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protected boolean shouldStepInto( XIndexContainer xContainer ) throws com.sun.star.uno.Exception
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{
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// step down the tree, if possible
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XServiceInfo xSI = UNO.queryServiceInfo( xContainer );
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if ( null != xSI
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&& ( xSI.supportsService( "com.sun.star.form.FormComponents" )
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|| xSI.supportsService( "com.sun.star.form.component.GridControl" )
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)
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)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/* ------------------------------------------------------------------ */
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public void handle( Object aFormComponent ) throws com.sun.star.uno.Exception
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{
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XIndexContainer xCont = UNO.queryIndexContainer( aFormComponent );
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if ( ( null != xCont )
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&& shouldStepInto( xCont )
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)
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{
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for ( int i=0; i<xCont.getCount(); ++i )
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{
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handle( xCont.getByIndex( i ) );
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}
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}
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}
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}
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