MyGameFramework/lib/gwen/controls/gwen_scrollbar.cpp

/*
	GWEN
	Copyright (c) 2010 Facepunch Studios
	See license in Gwen.h
*/


#include "gwen_scrollbar.h"
#include "gwen_scrollbarbutton.h"
#include "gwen_scrollbarbar.h"

using namespace Gwen;
using namespace Gwen::Controls;
using namespace Gwen::ControlsInternal;


GWEN_CONTROL_CONSTRUCTOR( BaseScrollBar )
{
	for (int i = 0; i < 2; i++)
	{
		m_ScrollButton[i] = new ScrollBarButton( this );
	}
	
	m_Bar = new ScrollBarBar( this );

	SetBounds( 0, 0, 15, 15 );
	m_bDepressed = false;

	m_fScrolledAmount = 0;
	m_fContentSize = 0;
	m_fViewableContentSize = 0;

	SetNudgeAmount( 20 );
}

void BaseScrollBar::Render( Skin::Base* skin )
{
	skin->DrawScrollBar( this, IsHorizontal(), m_bDepressed );
}

void BaseScrollBar::OnBarMoved( Controls::Base* /*control*/ )
{
	onBarMoved.Call( this );
}

void BaseScrollBar::BarMovedNotification()
{
	OnBarMoved( this );
}

void BaseScrollBar::SetContentSize( float size )
{
	if ( m_fContentSize != size )
	{
		Invalidate();
	}

	m_fContentSize = size;
	
}
void BaseScrollBar::SetViewableContentSize( float size )
{
	if ( m_fViewableContentSize != size )
		Invalidate();

	m_fViewableContentSize = size;
}

bool BaseScrollBar::SetScrolledAmount( float amount, bool forceUpdate )
{
	if ( m_fScrolledAmount == amount && !forceUpdate ) return false;

	m_fScrolledAmount = amount;
	Invalidate();
	BarMovedNotification();
	return true;
}