GEZOrderModifier.cpp

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 Source Code 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "../../idlib/precompiled.h"
#pragma hdrstop

#include "GEApp.h"
#include "GEZOrderModifier.h"


rvGEZOrderModifier::rvGEZOrderModifier ( const char* name, idWindow* window, EZOrderChange change ) :
        rvGEModifier ( name, window )
{
        int                     count;
        int                     index;
        idWindow*       parent;
        
        parent = window->GetParent ( );
        if ( !parent ) 
        {
                return;
        }
        
        count = parent->GetChildCount ( );
        index = parent->GetChildIndex ( mWindow );
                                
        if ( index + 1 >= count )
        {
                mUndoBefore = NULL;
        }
        else
        {
                mUndoBefore = parent->GetChild ( index + 1 );
        }
        
        switch ( change )
        {
                case ZO_FORWARD:
                        index+=2;                       
                        break;
                
                case ZO_BACKWARD:
                        if ( index == 0 )
                        {
                                index = 1;
                        }
                        else
                        {
                                index-=1;
                        }
                        break;
                        
                case ZO_BACK:
                        index = 0;
                        break;
                        
                case ZO_FRONT:
                        index = count;
                        break;
        }

        if ( index >= count )
        {
                mBefore = NULL;
        }
        else
        {
                mBefore = parent->GetChild ( index );
        }
}

bool rvGEZOrderModifier::Apply ( void )
{
        idWindow* parent;
        
        parent = mWindow->GetParent ( );
        
        parent->RemoveChild ( mWindow );
        parent->InsertChild ( mWindow, mBefore );       

        return true;
}

bool rvGEZOrderModifier::Undo ( void )
{
        idWindow* parent;
        
        parent = mWindow->GetParent ( );
        
        parent->RemoveChild ( mWindow );
        parent->InsertChild ( mWindow, mUndoBefore );   
        
        return true;
}

bool rvGEZOrderModifier::IsValid ( void )
{
        if ( !mWindow->GetParent ( ) )
        {
                return false;
        }
        
        return true;
}