// SizingDialog.h: interface for the CSizingDialog class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_SIZINGDIALOG_H__5C154C94_9FEF_11D3_82D8_0020182B97FC__INCLUDED_)
#define AFX_SIZINGDIALOG_H__5C154C94_9FEF_11D3_82D8_0020182B97FC__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

//#define SD_TOP	0x00000001
#define SD_HORZ		0x00000002
//#define SD_LEFT	0x00000010
#define SD_VERT		0x00000020
#define SD_MOVING   0x00010000
#define SD_SIZING   0x00020000

#define RECT_WIPE(rc) (rc.left = rc.top = rc.right = rc.bottom = 0)
#define IS_RECT_EMPTY(rc) ((rc.left == 0) && (rc.top == 0) && (rc.right == 0) && (rc.bottom == 0))
#define POINT_WIPE(pt) (pt.x = pt.y = 0)
#define IS_POINT_EMPTY(pt) ((pt.x == 0) && (pt.y == 0))

template<class T>
class CSizingDialog
{
public:
	CSizingDialog()
		{ POINT_WIPE(m_ptMin); }

	bool SetMin(UINT nID);
	bool SetMin(LPPOINT pt);

	bool SetControlSizing(UINT nID, DWORD dwLocation);

BEGIN_MSG_MAP(CSizingDialog<T>)
	MESSAGE_HANDLER(WM_SIZE, OnSize)
	MESSAGE_HANDLER(WM_GETMINMAXINFO, OnGetMinMaxInfo)
END_MSG_MAP()

protected:
//	LRESULT OnInitDialog(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
	LRESULT OnSize(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
	LRESULT OnGetMinMaxInfo(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);

	struct POS_DATA
	{
		DWORD	dwLocation;
		UINT	nID;
		RECT	rcOffsets;
	};

	typedef vector<POS_DATA> pos_array;
	pos_array m_aPositions;
	POINT m_ptMin;
};

template <class T>
bool CSizingDialog<T>::SetMin(LPPOINT pt)
{
	m_ptMin.x = pt.x;
	m_ptMin.y = pt.y;
	return true;
}
template <class T>
bool CSizingDialog<T>::SetControlSizing(UINT nID, DWORD dwLocation)
{
	T* pThis = (T*)this;
	ASSERT(dwLocation);
	ASSERT(pThis->GetDlgItem(nID));

	POS_DATA ps;
	ps.dwLocation = dwLocation;
	ps.nID = nID;

	RECT rcDlg;
	if(!pThis->GetClientRect(&rcDlg))
		return false;

	RECT rcCtl;
	if(!::GetWindowRect(pThis->GetDlgItem(nID), &rcCtl))
		return false;

	if(!pThis->ScreenToClient(&rcCtl))
		return false;

	ps.rcOffsets.left = rcCtl.left - rcDlg.left;
	ps.rcOffsets.top = rcCtl.top - rcDlg.top;
	ps.rcOffsets.right = rcDlg.right - rcCtl.right;
	ps.rcOffsets.bottom = rcDlg.bottom - rcCtl.bottom;

	m_aPositions.push_back(ps);

	return true;
}

template <class T>
bool CSizingDialog<T>::SetMin(UINT nID)
{
	T* pThis = (T*)this;

	ASSERT(pThis->GetDlgItem(nID));
	RECT rcCtl;
	if(!::GetWindowRect(pThis->GetDlgItem(nID), &rcCtl))
		return false;

	RECT rcDlg;
	if(!pThis->GetWindowRect(&rcDlg))
		return false;

	m_ptMin.x = rcCtl.right - rcDlg.left;
	m_ptMin.y = rcCtl.bottom - rcDlg.top;

	return true;
}


template <class T>
LRESULT CSizingDialog<T>::OnGetMinMaxInfo(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
	if(IS_POINT_EMPTY(m_ptMin))
		return 0;

	LPMINMAXINFO lpmmi = (LPMINMAXINFO) lParam; // address of structure 
	lpmmi->ptMinTrackSize = m_ptMin;
	return 0;
}

template <class T>
LRESULT CSizingDialog<T>::OnSize(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
	T* pThis = (T*)this;
	UINT nWidth = LOWORD(lParam);  // width of client area 
	UINT nHeight = HIWORD(lParam); // height of client area 	

	for(pos_array::iterator iter = m_aPositions.begin(); iter != m_aPositions.end(); iter++)
	{
		RECT rc;
		if(!::GetWindowRect(pThis->GetDlgItem(iter->nID), &rc))
			continue;
		if(!pThis->ScreenToClient(&rc))
			continue;
				
		if(iter->dwLocation & SD_MOVING)
		{
			::SetWindowPos(pThis->GetDlgItem(iter->nID), NULL, 
						   (iter->dwLocation & SD_HORZ) ? 
								nWidth - iter->rcOffsets.right - rc.right + rc.left : 
								rc.left,
						   (iter->dwLocation & SD_VERT) ?
								nHeight - iter->rcOffsets.bottom - rc.bottom + rc.top :
								rc.top,
						   0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_DEFERERASE);
		}
		else if(iter->dwLocation & SD_SIZING)
		{
			::SetWindowPos(pThis->GetDlgItem(iter->nID), NULL, 0, 0, 
						   (iter->dwLocation & SD_HORZ) ?
								nWidth - iter->rcOffsets.right - rc.left :
								rc.right - rc.left,
						   (iter->dwLocation & SD_VERT) ?
								nHeight - iter->rcOffsets.bottom - rc.top :
								rc.bottom - rc.top,
						   SWP_NOMOVE | SWP_NOZORDER | SWP_DEFERERASE);
		}
	}

	return 0;
}

#endif // !defined(AFX_SIZINGDIALOG_H__5C154C94_9FEF_11D3_82D8_0020182B97FC__INCLUDED_)