void CompoundPlug::setInput( PlugPtr input )
{
if( input.get() == getInput<Plug>() )
{
return;
}
// unfortunately we have to duplicate the check in Plug::setInput()
// ourselves as we delay calling Plug::setInput() until we've connected
// the children, but need to do the check first.
/// \todo I think there's a case for not having CompoundPlug at all,
/// and having Plug have all its functionality.
if( input && !acceptsInput( input ) )
{
std::string what = boost::str(
boost::format( "Plug \"%s\" rejects input \"%s\"." )
% fullName()
% input->fullName()
);
throw IECore::Exception( what );
}
{
// we use the plugInputChangedConnection to trigger calls to updateInputFromChildInputs()
// when child inputs are changed by code elsewhere. it would be counterproductive for
// us to call updateInputFromChildInputs() while we ourselves are changing those inputs,
// so we temporarily block the connection.
BlockedConnection block( m_plugInputChangedConnection );
if( !input )
{
for( ChildContainer::const_iterator it = children().begin(); it!=children().end(); it++ )
{
IECore::staticPointerCast<Plug>( *it )->setInput( 0 );
}
}
else
{
CompoundPlugPtr p = IECore::staticPointerCast<CompoundPlug>( input );
ChildContainer::const_iterator it1, it2;
for( it1 = children().begin(), it2 = p->children().begin(); it1!=children().end(); it1++, it2++ )
{
IECore::staticPointerCast<Plug>( *it1 )->setInput( IECore::staticPointerCast<Plug>( *it2 ) );
}
}
}
// we connect ourselves last, so that all our child plugs are correctly connected
// before we signal our own connection change.
ValuePlug::setInput( input );
}
