editcell.cpp

一个fir滤波器Designer的例子

// EditCell.cpp : implementation file

#include "stdafx.h"
#include "ListCtrl.h"
#include "EditCell.h"

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

/////////////////////////////////////////////////////////////////////////////
// EditCell

EditCell::EditCell (EditListCtrl* pCtrl, int iItem, int iSubItem, CString sInitText)
:   bEscape (FALSE)
{
    pListCtrl = pCtrl;
    Item = iItem;
    SubItem = iSubItem;
    InitText = sInitText;
}

EditCell::~EditCell()
{
}

BEGIN_MESSAGE_MAP(EditCell, CEdit)
//{{AFX_MSG_MAP(EditCell)
ON_WM_KILLFOCUS()
ON_WM_NCDESTROY()
ON_WM_CHAR()
ON_WM_CREATE()
ON_WM_GETDLGCODE()
ON_WM_KEYUP()
ON_WM_KEYDOWN()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// EditCell message handlers

void EditCell::SetListText()
{
    CString Text;
    GetWindowText (Text);
	
	if(Text.GetLength()==0)
	{
		Text="0";
	}
    // Send Notification to parent of ListView ctrl
    LV_DISPINFO dispinfo;
    dispinfo.hdr.hwndFrom = GetParent()->m_hWnd;
    dispinfo.hdr.idFrom = GetDlgCtrlID();
    dispinfo.hdr.code = LVN_ENDLABELEDIT;
	
    dispinfo.item.mask = LVIF_TEXT;
    dispinfo.item.iItem = Item;
    dispinfo.item.iSubItem = SubItem;
    dispinfo.item.pszText = bEscape ? NULL : LPTSTR ((LPCTSTR) Text);
    dispinfo.item.cchTextMax = Text.GetLength();
    GetParent()->GetParent()->SendMessage (WM_NOTIFY, GetParent()->GetDlgCtrlID(), (LPARAM) &dispinfo);
}

BOOL EditCell::PreTranslateMessage (MSG* pMsg) 
{
    if (pMsg->message == WM_KEYDOWN)
    {
		if (pMsg->wParam == VK_RETURN || pMsg->wParam == VK_DELETE || 
			pMsg->wParam == VK_ESCAPE || pMsg->wParam == VK_TAB || 
			pMsg->wParam == VK_UP || pMsg->wParam == VK_DOWN || GetKeyState (VK_CONTROL))
		{
			::TranslateMessage (pMsg);
			::DispatchMessage (pMsg);
			return TRUE;		    	// DO NOT process further
		}
    }
    return CEdit::PreTranslateMessage (pMsg);
}

void EditCell::OnKillFocus (CWnd* pNewWnd) 
{
    CEdit::OnKillFocus(pNewWnd);
    SetListText();
    DestroyWindow();
}

void EditCell::OnNcDestroy() 
{
    CEdit::OnNcDestroy();
    delete this;
}

void EditCell::OnKeyDown (UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    // Up and down are in the OnKeyDown so that the user can hold down the arrow
    // keys to scroll through the entries.
    switch (nChar)
    {
	case VK_UP :
		{
			if (Item > 0 && SubItem==1)
				pListCtrl->EditSubItem (Item - 1, SubItem);
			return;
		}
	case VK_DOWN :
		{
			if (SubItem==1)
				pListCtrl->EditSubItem (Item + 1, SubItem);
			return;
		}
    }
    CEdit::OnKeyDown(nChar, nRepCnt, nFlags);
}

void EditCell::OnKeyUp (UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    switch (nChar)
    {
	case VK_NEXT :
		{
			int Count = pListCtrl->GetItemCount();
			int NewItem = Item + pListCtrl->GetCountPerPage();
			if (Count > NewItem)
				pListCtrl->EditSubItem (NewItem, SubItem);
			else
				pListCtrl->EditSubItem (Count - 1, SubItem);
			return;
		}
	case VK_PRIOR :
		{
			int NewItem = Item - pListCtrl->GetCountPerPage();
			if (NewItem > 0)
				pListCtrl->EditSubItem (NewItem, SubItem);
			else
				pListCtrl->EditSubItem (0, SubItem);
			return;
		}
    }
    CEdit::OnKeyUp (nChar, nRepCnt, nFlags);
}

void EditCell::OnChar (UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    switch (nChar)
    {
	case VK_ESCAPE :
		{
			if (nChar == VK_ESCAPE)
				bEscape = TRUE;
			GetParent()->SetFocus();
			return;
		}
	case VK_RETURN :
		{
			pListCtrl->EditSubItem (Item + 1, 1);
			return;
		}
    }
	if(nChar>='0'&&nChar<='9'||nChar==VK_BACK||nChar=='-')
	{
		CEdit::OnChar (nChar, nRepCnt, nFlags);
	}
}

int EditCell::OnCreate (LPCREATESTRUCT lpCreateStruct) 
{
    if (CEdit::OnCreate (lpCreateStruct) == -1)
		return -1;
    // Set the proper font
    CFont* Font = GetParent()->GetFont();
    SetFont (Font);
	
    SetWindowText (InitText);
    SetFocus();
    SetSel (0,-1);
    return 0;
}

UINT EditCell::OnGetDlgCode() 
{
    return CEdit::OnGetDlgCode() | DLGC_WANTARROWS | DLGC_WANTTAB;
}