#pragma once

inline double CalculateDelay(double state) {
	return pow(state, 2);
}

class OrderListUI : public CTileLayoutUI
{
public:
	enum { SCROLL_TIMERID = 10 };

	OrderListUI() : m_uButtonState(0), m_dwDelayDeltaY(0), m_dwDelayNum(0), m_dwDelayLeft(0)
	{
		SetItemSize(CSize(1000, 200));
	}

	//刷新
	void Refresh();

	void DoEvent(TEventUI& event)
	{
		if (!IsMouseEnabled() && event.Type > UIEVENT__MOUSEBEGIN && event.Type < UIEVENT__MOUSEEND) {
			if (m_pParent != NULL) m_pParent->DoEvent(event);
			else CTileLayoutUI::DoEvent(event);
			return;
		}

		if (event.Type == UIEVENT_TIMER && event.wParam == SCROLL_TIMERID)
		{
			if ((m_uButtonState & UISTATE_CAPTURED) != 0) {
				POINT pt = m_pManager->GetMousePos();
				LONG cy = (pt.y - m_ptLastMouse.y);
				m_ptLastMouse = pt;
				SIZE sz = GetScrollPos();
				sz.cy -= cy;
				SetScrollPos(sz);
				return;
			}
			else if (m_dwDelayLeft > 0) {
				--m_dwDelayLeft;
				SIZE sz = GetScrollPos();
				LONG lDeltaY = (LONG)(CalculateDelay((double)m_dwDelayLeft / m_dwDelayNum) * m_dwDelayDeltaY);
				if ((lDeltaY > 0 && sz.cy != 0) || (lDeltaY < 0 && sz.cy != GetScrollRange().cy)) {
					sz.cy -= lDeltaY;
					SetScrollPos(sz);
					return;
				}
			}
			m_dwDelayDeltaY = 0;
			m_dwDelayNum = 0;
			m_dwDelayLeft = 0;
			m_pManager->KillTimer(this, SCROLL_TIMERID);
			return;
		}
		if (event.Type == UIEVENT_BUTTONDOWN && IsEnabled())
		{
			m_uButtonState |= UISTATE_CAPTURED;
			m_ptLastMouse = event.ptMouse;
			m_dwDelayDeltaY = 0;
			m_dwDelayNum = 0;
			m_dwDelayLeft = 0;
			::SetCursor(::LoadCursor(NULL, MAKEINTRESOURCE(IDC_HAND)));
			m_pManager->SetTimer(this, SCROLL_TIMERID, 50U);
			return;
		}
		if (event.Type == UIEVENT_BUTTONUP)
		{
			if ((m_uButtonState & UISTATE_CAPTURED) != 0) {
				m_uButtonState &= ~UISTATE_CAPTURED;
				::SetCursor(::LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW)));
				if (m_ptLastMouse.y != event.ptMouse.y) {
					m_dwDelayDeltaY = (event.ptMouse.y - m_ptLastMouse.y);
					if (m_dwDelayDeltaY > 120) m_dwDelayDeltaY = 120;
					else if (m_dwDelayDeltaY < -120) m_dwDelayDeltaY = -120;
					m_dwDelayNum = (DWORD)sqrt((double)abs(m_dwDelayDeltaY)) * 5;
					m_dwDelayLeft = m_dwDelayNum;
				}
				else
					m_pManager->KillTimer(this, SCROLL_TIMERID);
			}
			return;
		}
		if (event.Type == UIEVENT_SCROLLWHEEL)
		{
			LONG lDeltaY = 0;
			if (m_dwDelayNum > 0) lDeltaY = (LONG)(CalculateDelay((double)m_dwDelayLeft / m_dwDelayNum) * m_dwDelayDeltaY);
			switch (LOWORD(event.wParam)) {
			case SB_LINEUP:
				if (m_dwDelayDeltaY >= 0) m_dwDelayDeltaY = lDeltaY + 8;
				else m_dwDelayDeltaY = lDeltaY + 12;
				break;
			case SB_LINEDOWN:
				if (m_dwDelayDeltaY <= 0) m_dwDelayDeltaY = lDeltaY - 8;
				else m_dwDelayDeltaY = lDeltaY - 12;
				break;
			}
			if (m_dwDelayDeltaY > 100) m_dwDelayDeltaY = 100;
			else if (m_dwDelayDeltaY < -100) m_dwDelayDeltaY = -100;
			m_dwDelayNum = (DWORD)sqrt((double)abs(m_dwDelayDeltaY)) * 5;
			m_dwDelayLeft = m_dwDelayNum;
			m_pManager->SetTimer(this, SCROLL_TIMERID, 50U);
			return;
		}
		CTileLayoutUI::DoEvent(event);
	}

private:
	UINT m_uButtonState;
	POINT m_ptLastMouse;
	LONG m_dwDelayDeltaY;
	DWORD m_dwDelayNum;
	DWORD m_dwDelayLeft;

	int m_status = 1; //1：未处理 2：已确认 3：配送中 4：成功 5：失败 6：退款中
};