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

#include "Gwen/Gwen.h"
#include "Gwen/Skin.h"
#include "Gwen/Controls/TabButton.h"
#include "Gwen/Controls/TabControl.h"
#include "Gwen/Controls/Highlight.h"
#include "Gwen/DragAndDrop.h"

using namespace Gwen;
using namespace Gwen::Controls;

GWEN_CONTROL_CONSTRUCTOR(TabButton)
{
	m_Page = NULL;
	m_Control = NULL;

	SetPadding(Padding(2, 2, 2, 2));

	DragAndDrop_SetPackage(true, "TabButtonMove");
	SetAlignment(Pos::Top | Pos::Left);
	SetTextPadding(Padding(5, 3, 3, 3));
}

void TabButton::Render(Skin::Base* skin)
{
	skin->DrawTabButton(this, m_Page && m_Page->Visible());
}

void TabButton::SetTabControl(TabControl* ctrl)
{
	if (m_Control == ctrl) return;

	if (m_Control)
	{
		m_Control->OnLoseTab(this);
	}

	m_Control = ctrl;
}

bool TabButton::DragAndDrop_ShouldStartDrag()
{
	return m_Control->DoesAllowDrag();
}

bool TabButton::OnKeyUp(bool bDown)
{
	OnKeyLeft(bDown);
	return true;
}
bool TabButton::OnKeyDown(bool bDown)
{
	OnKeyRight(bDown);
	return true;
}

bool TabButton::OnKeyLeft(bool bDown)
{
	if (bDown)
	{
		Base::List::reverse_iterator it = std::find(m_Parent->Children.rbegin(), m_Parent->Children.rend(), this);
		if (it != m_Parent->Children.rend() && (++it != m_Parent->Children.rend()))
		{
			Base* pNextTab = *it;
			GetTabControl()->OnTabPressed(pNextTab);
			Gwen::KeyboardFocus = pNextTab;
		}
	}

	return true;
}
bool TabButton::OnKeyRight(bool bDown)
{
	if (bDown)
	{
		Base::List::iterator it = std::find(m_Parent->Children.begin(), m_Parent->Children.end(), this);
		if (it != m_Parent->Children.end() && (++it != m_Parent->Children.end()))
		{
			Base* pNextTab = *it;
			GetTabControl()->OnTabPressed(pNextTab);
			Gwen::KeyboardFocus = pNextTab;
		}
	}

	return true;
}