The Diffraction Grating Calculator

// GridCellCombo.cpp: implementation of the CGridCellCombo class.
//
//////////////////////////////////////////////////////////////////////

#include "StdAfx.h"
#include "GridCtrl.h"
#include "GridCellCombo.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

IMPLEMENT_DYNCREATE(CGridCellCombo, CGridCell)

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CGridCellCombo::CGridCellCombo()
:CGridCell(), m_cmbStringList(0)
{
	m_dwStyle = CBS_DROPDOWNLIST;
}

CGridCellCombo::CGridCellCombo(DWORD dwStyle) 
:CGridCell(), m_cmbStringList(0)
{
	Init(dwStyle);
}

CGridCellCombo::~CGridCellCombo()
{
	int nCount = m_cmbStringList.GetObjectCount();
	for(int i = 0; i < nCount; i++)
	{
		delete (CString*) m_cmbStringList.GetObjectByIdx(0);
		m_cmbStringList.DeleteObjectIdx(0);
	}
}

int CGridCellCombo::AddString(CString sText)
{
	CString *psTmp = new CString(sText);
	if(!psTmp)
		throw;

	return m_cmbStringList.AddObject(psTmp);
}

BOOL CGridCellCombo::Edit(int nRow, int nCol, CRect rect, CPoint /* point */, 
							 UINT nID, UINT nChar)
{
	m_bEditing = TRUE;

	// CInPlaceCombo auto-deletes itself
	m_pEditWnd = new CInPlaceCombo(GetGrid(), rect,
		m_dwStyle|DTS_UPDOWN, nID, nRow, nCol, 
		GetTextClr(), GetBackClr(), GetText(), nChar, &m_cmbStringList);

	return TRUE;
}

CWnd* CGridCellCombo::GetEditWnd() const
{
	return m_pEditWnd;
}

void CGridCellCombo::EndEdit()
{
	if (m_pEditWnd) 
		((CInPlaceCombo*)m_pEditWnd)->EndEdit();
}


/////////////////////////////////////////////////////////////////////////////
// CInPlaceDateTime

CInPlaceCombo::CInPlaceCombo(CWnd* pParent, CRect& rect, DWORD dwStyle, UINT nID,
								   int nRow, int nColumn, 
								   COLORREF crFore, COLORREF crBack,
								   CString sText,
								   UINT nFirstChar,
								   CObjectList* pList)
{
	int nCount = pList->GetObjectCount();

	CRect cmbRect;
	cmbRect.left = rect.left;
	cmbRect.top = rect.top;
	cmbRect.right = rect.right;
	cmbRect.bottom = rect.top + (min(nCount, 10) + 2) * rect.Height(); 
	
	m_crForeClr     = crFore;
	m_crBackClr     = crBack;
	m_nRow          = nRow;
	m_nCol          = nColumn;
	m_nLastChar     = 0; 
	m_bExitOnArrows = FALSE;
	m_sText        = sText;

	DWORD dwStl = WS_CHILD|WS_VISIBLE|WS_VSCROLL|dwStyle;

	if (!Create(dwStl, cmbRect, pParent, nID)) 
		return;

	SetFont(pParent->GetFont());
	SetFocus();

	CString* psTmp = NULL;
	for(int i = 0; i < nCount; i++)
	{
		psTmp = (CString*) pList->GetObjectByIdx(i);
		if(psTmp)
			AddString(*psTmp);
	}

	SetCurSel(FindStringExact(0, sText));

	switch (nFirstChar) 
	{
		case VK_LBUTTON: 
		case VK_RETURN: return;
		case VK_BACK:   break;
		case VK_DOWN: 
		case VK_UP:   
		case VK_RIGHT:
		case VK_LEFT:  
		case VK_NEXT:  
		case VK_PRIOR: 
		case VK_HOME:  
		case VK_END:    return;
		default:        break;
	}
	SendMessage(WM_CHAR, nFirstChar);
}

CInPlaceCombo::~CInPlaceCombo()
{
}

void CInPlaceCombo::EndEdit()
{
	CString str;
	if (::IsWindow(m_hWnd)) 
		GetWindowText(str);

	// Send Notification to parent
	GV_DISPINFO dispinfo;

	dispinfo.hdr.hwndFrom = GetSafeHwnd();
	dispinfo.hdr.idFrom   = GetDlgCtrlID();
	dispinfo.hdr.code     = GVN_ENDLABELEDIT;

	dispinfo.item.mask    = LVIF_TEXT|LVIF_PARAM;
	dispinfo.item.row     = m_nRow;
	dispinfo.item.col     = m_nCol;
	dispinfo.item.strText = str;
	dispinfo.item.lParam  = (LPARAM) m_nLastChar; 

	CWnd* pOwner = GetOwner();
	if (IsWindow(pOwner->GetSafeHwnd())) {
		pOwner->SendMessage(WM_NOTIFY, GetDlgCtrlID(), (LPARAM)&dispinfo);
	}

	// Close this window (PostNcDestroy will delete this)
	if (::IsWindow(m_hWnd)) {
		PostMessage(WM_CLOSE, 0, 0);
	}
}

void CInPlaceCombo::PostNcDestroy() 
{
	CComboBox::PostNcDestroy();
	delete this;
}

BEGIN_MESSAGE_MAP(CInPlaceCombo, CComboBox)
	//{{AFX_MSG_MAP(CInPlaceDateTime)
	ON_CONTROL_REFLECT(CBN_SELCHANGE, OnSelChange)
	ON_WM_KILLFOCUS()
	ON_WM_KEYDOWN()
	ON_WM_KEYUP()
	ON_WM_GETDLGCODE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CInPlaceDateTime message handlers
void CInPlaceCombo::OnSelChange()
{
	EndEdit();
}

void CInPlaceCombo::OnKillFocus(CWnd* pNewWnd) 
{
	CComboBox::OnKillFocus(pNewWnd);

	if (GetSafeHwnd() == pNewWnd->GetSafeHwnd()) {
		return;
	}
	EndEdit();
}

UINT CInPlaceCombo::OnGetDlgCode() 
{
	return DLGC_WANTALLKEYS;
}

void CInPlaceCombo::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	if (( nChar == VK_PRIOR || nChar == VK_NEXT ||
		nChar == VK_DOWN  || nChar == VK_UP   ||
		nChar == VK_RIGHT || nChar == VK_LEFT) &&
		(m_bExitOnArrows  || GetKeyState(VK_CONTROL) < 0))
	{
		m_nLastChar = nChar;
		GetParent()->SetFocus();
		return;
	}

	CComboBox::OnKeyDown(nChar, nRepCnt, nFlags);
}

void CInPlaceCombo::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	if (nChar == VK_TAB || nChar == VK_RETURN || nChar == VK_ESCAPE)
	{
		m_nLastChar = nChar;
		GetParent()->SetFocus();    // This will destroy this window
		return;
	}

	CComboBox::OnKeyUp(nChar, nRepCnt, nFlags);
}