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

#include "Gwen/Controls/ScrollBar.h"
#include "Gwen/Controls/ScrollBarButton.h"
#include "Gwen/Controls/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, false, 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) return false;

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