/*****************************************************************************
                    The Dark Mod GPL Source Code
 
 This file is part of the The Dark Mod Source Code, originally based 
 on the Doom 3 GPL Source Code as published in 2011.
 
 The Dark Mod 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. For details, see LICENSE.TXT.
 
 Project: The Dark Mod (http://www.thedarkmod.com/)
 
******************************************************************************/

#include "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;
}
