vzordercmd.cpp

/* This file is part of the KDE project
   Copyright (C) 2002, 2003 The Karbon Developers
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#include <tdelocale.h>
 
#include "vzordercmd.h"
#include "vselection.h"
#include "vdocument.h"
#include "vlayer.h"
 
VZOrderCmd::VZOrderCmd( VDocument *doc, VOrder state )
    : VCommand( doc, i18n( "Order Selection" ) ), m_state( state )
{
    m_selection = document()->selection()->clone();
}
 
VZOrderCmd::VZOrderCmd( VDocument *doc, VObject *obj, VOrder state )
    : VCommand( doc, i18n( "Order Selection" ) ), m_state( state )
{
    m_selection = new VSelection();
    m_selection->append( obj );
}
 
VZOrderCmd::~VZOrderCmd()
{
    delete( m_selection );
}
 
void
VZOrderCmd::execute()
{
    if( m_state == sendToBack )
    {
        VObjectListIterator itr( document()->selection()->objects() );
        for ( itr.toLast() ; itr.current() ; --itr )
        {
            // remove from old layer
            VObjectList objects;
            VLayerListIterator litr( document()->layers() );
 
            for ( ; litr.current(); ++litr )
            {
                objects = litr.current()->objects();
                VObjectListIterator itr2( objects );
                for ( ; itr2.current(); ++itr2 )
                    if( itr2.current() == itr.current() )
                    {
                        litr.current()->sendToBack( *itr2.current() );
                        itr2.current()->setState( VObject::selected );
                    }
            }
        }
    }
    else if( m_state == bringToFront )
    {
        VObjectListIterator itr( document()->selection()->objects() );
        for ( ; itr.current() ; ++itr )
        {
            // remove from old layer
            VObjectList objects;
            VLayerListIterator litr( document()->layers() );
 
            for ( ; litr.current(); ++litr )
            {
                objects = litr.current()->objects();
                VObjectListIterator itr2( objects );
                for ( ; itr2.current(); ++itr2 )
                    if( itr2.current() == itr.current() )
                    {
                        litr.current()->bringToFront( *itr2.current() );
                        itr2.current()->setState( VObject::selected );
                    }
            }
        }
    }
    else if( m_state == up || m_state == down )
    {
        VSelection selection = *m_selection;
        // TODO : this doesn't work for objects inside groups!
        VLayerListIterator litr( document()->layers() );
        while( !selection.objects().isEmpty() && litr.current() )
        {
            for ( ; litr.current(); ++litr )
            {
                if( litr.current()->state() == VObject::deleted )
                    continue;
                VObjectList objects = litr.current()->objects();
                VObjectList todo;
                VObjectListIterator objectItr( objects );
                // find all selected VObjects that are in the current layer
                for ( ; objectItr.current(); ++objectItr )
                {
                    VObjectListIterator selectionItr( selection.objects() );
                    for ( ; selectionItr.current() ; ++selectionItr )
                    {
                        if( objectItr.current() == selectionItr.current() )
                        {
                            if( m_state == up )
                                todo.prepend( objectItr.current() );
                            else
                                todo.append( objectItr.current() );
                        }
                    }
                }
 
                kdDebug(38000) << "todo.count() : " << todo.count() << endl;
 
                // we have found the affected vobjects in this vlayer
                VObjectListIterator todoItr( todo );
                for ( ; todoItr.current(); ++todoItr )
                {
                    if( m_state == up )
                        litr.current()->upwards( *todoItr.current() );
                    else
                        litr.current()->downwards( *todoItr.current() );
                    // remove from selection
                    selection.take( *todoItr.current() );
                    // make sure object stays selected
                    todoItr.current()->setState( VObject::selected );
                }
            }
        }
    }
    setSuccess( true );
}
 
void
VZOrderCmd::unexecute()
{
    if( m_state == sendToBack )
    {
        m_state = bringToFront;
        execute();
        m_state = sendToBack;
    }
    else if( m_state == bringToFront )
    {
        m_state = sendToBack;
        execute();
        m_state = bringToFront;
    }
    else if( m_state == up )
    {
        m_state = down;
        execute();
        m_state = up;
    }
    else if( m_state == down )
    {
        m_state = up;
        execute();
        m_state = down;
    }
    setSuccess( false );
}