#include "Gwen/Controls/PanelListPanel.h"

using namespace Gwen;
using namespace Controls;

GWEN_CONTROL_CONSTRUCTOR(PanelListPanel)
{
	m_bVertical = false;
	m_bSizeToChildren = true;
	m_iControlSpacing = 5;
	m_iLineSpacing = 5;
	m_bWrapping = true;
}

void PanelListPanel::Render(Gwen::Skin::Base* /*skin*/)
{
}

Gwen::Point PanelListPanel::GetBiggestChildSize()
{
	int width = 0;
	int height = 0;

	for (Base::List::iterator it = Children.begin(); it != Children.end(); ++it)
	{
		Controls::Base* pChild = *it;
		if (pChild->Width() > width)
			width = pChild->Width();

		if (pChild->Height() > height)
			height = pChild->Height();
	}

	return Gwen::Point(width, height);
}

void PanelListPanel::DoVerticalLayout()
{
	int panelWidth = 0;
	int panelX = GetPadding().left;
	int panelY = GetPadding().top;
	int lastPanelY = panelY;
	int testWrap = 0;

	Gwen::Point childSize = GetBiggestChildSize();
	//Lay my children out accordingly
	for (Base::List::iterator it = Children.begin(); it != Children.end(); ++it)
	{
		Controls::Base* pChild = *it;
		testWrap = lastPanelY + m_iControlSpacing + childSize.y;
		if (m_bWrapping && testWrap > Height() - GetPadding().bottom)
		{
			panelY = GetPadding().top;
			panelX = GetPadding().left + panelWidth + m_iLineSpacing;
			lastPanelY = panelY + m_iControlSpacing + childSize.y;
		}
		else
		{
			panelY = lastPanelY;
			lastPanelY = testWrap;
		}

		pChild->SetPos(panelX, panelY);

		if (pChild->X() + childSize.x > panelWidth)
			panelWidth = pChild->X() + childSize.x;
	}

	if (m_bSizeToChildren)
	{
		Gwen::Point childrenSizeTotal = ChildrenSize();
		SetSize(childrenSizeTotal.x, Height());
	}
}

void PanelListPanel::DoHorizontalLayout()
{
	int panelHeight = 0;
	int panelX = GetPadding().left;
	int panelY = GetPadding().top;
	int lastPanelX = panelX;
	int testWrap = 0;

	Gwen::Point childSize = GetBiggestChildSize();

	for (Base::List::iterator it = Children.begin(); it != Children.end(); ++it)
	{
		Controls::Base* pChild = *it;

		testWrap = lastPanelX + m_iControlSpacing + childSize.x;
		if (m_bWrapping && testWrap > Width() - GetPadding().right)
		{
			panelX = GetPadding().left;
			panelY = GetPadding().top + panelHeight + m_iLineSpacing;
			lastPanelX = panelX + m_iControlSpacing + childSize.x;
		}
		else
		{
			panelX = lastPanelX;
			lastPanelX = testWrap;
		}

		pChild->SetPos(panelX, panelY);

		if (pChild->Y() + childSize.y > panelHeight)
			panelHeight = pChild->Y() + childSize.y;
	}

	if (m_bSizeToChildren)
	{
		Gwen::Point childrenSizeTotal = ChildrenSize();
		SetSize(Width(), childrenSizeTotal.y);
	}
}

void PanelListPanel::Layout(Skin::Base* skin)
{
	BaseClass::Layout(skin);
	if (IsHorizontalLayout())
		DoHorizontalLayout();
	else
		DoVerticalLayout();
}