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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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winctrl3.cpp
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1998-06-16
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// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#include "stdafx.h"
#ifdef AFX_CORE4_SEG
#pragma code_seg(AFX_CORE4_SEG)
#endif
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define new DEBUG_NEW
/////////////////////////////////////////////////////////////////////////////
// _AFX_CHECKLIST_STATE
class _AFX_CHECKLIST_STATE : public CNoTrackObject
{
public:
_AFX_CHECKLIST_STATE();
virtual ~_AFX_CHECKLIST_STATE();
HBITMAP m_hbitmapCheck;
CSize m_sizeCheck;
};
_AFX_CHECKLIST_STATE::_AFX_CHECKLIST_STATE()
{
CBitmap bitmap;
#ifndef _AFX_NO_CTL3D_SUPPORT
if (afxData.bWin4 || AfxGetCtl3dState()->m_pfnSubclassDlgEx != NULL)
#else
if (afxData.bWin4)
#endif
VERIFY(bitmap.LoadBitmap(AFX_IDB_CHECKLISTBOX_95));
else
VERIFY(bitmap.LoadBitmap(AFX_IDB_CHECKLISTBOX_NT));
BITMAP bm;
bitmap.GetObject(sizeof (BITMAP), &bm);
m_sizeCheck.cx = bm.bmWidth / 3;
m_sizeCheck.cy = bm.bmHeight;
m_hbitmapCheck = (HBITMAP)bitmap.Detach();
}
_AFX_CHECKLIST_STATE::~_AFX_CHECKLIST_STATE()
{
if (m_hbitmapCheck != NULL)
::DeleteObject(m_hbitmapCheck);
}
EXTERN_PROCESS_LOCAL(_AFX_CHECKLIST_STATE, _afxChecklistState)
/////////////////////////////////////////////////////////////////////////////
// AFX_CHECK_DATA
struct AFX_CHECK_DATA
{
public:
int m_nCheck;
BOOL m_bEnabled;
DWORD m_dwUserData;
AFX_CHECK_DATA()
{
m_nCheck = 0;
m_bEnabled = TRUE;
m_dwUserData = 0;
};
};
/////////////////////////////////////////////////////////////////////////////
// CCheckListBox
BEGIN_MESSAGE_MAP(CCheckListBox, CListBox)
//{{AFX_MSG_MAP(CCheckListBox)
ON_WM_LBUTTONDOWN()
ON_WM_KEYDOWN()
ON_WM_CREATE()
ON_WM_LBUTTONDBLCLK()
ON_MESSAGE(WM_SETFONT, OnSetFont)
ON_MESSAGE(LB_ADDSTRING, OnLBAddString)
ON_MESSAGE(LB_FINDSTRING, OnLBFindString)
ON_MESSAGE(LB_FINDSTRINGEXACT, OnLBFindStringExact)
ON_MESSAGE(LB_GETITEMDATA, OnLBGetItemData)
ON_MESSAGE(LB_GETTEXT, OnLBGetText)
ON_MESSAGE(LB_INSERTSTRING, OnLBInsertString)
ON_MESSAGE(LB_SELECTSTRING, OnLBSelectString)
ON_MESSAGE(LB_SETITEMDATA, OnLBSetItemData)
ON_MESSAGE(LB_SETITEMHEIGHT, OnLBSetItemHeight)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
BOOL CCheckListBox::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID)
{
if (!(dwStyle & LBS_OWNERDRAWVARIABLE)) //must be one or the other
dwStyle |= LBS_OWNERDRAWFIXED;
return CListBox::Create(dwStyle, rect, pParentWnd, nID);
}
void CCheckListBox::SetCheckStyle(UINT nStyle)
{
ASSERT(nStyle == 0 || nStyle == BS_CHECKBOX ||
nStyle == BS_AUTOCHECKBOX || nStyle == BS_AUTO3STATE ||
nStyle == BS_3STATE);
m_nStyle = nStyle;
}
void CCheckListBox::SetCheck(int nIndex, int nCheck)
{
ASSERT(::IsWindow(m_hWnd));
if (nCheck == 2)
{
if (m_nStyle == BS_CHECKBOX || m_nStyle == BS_AUTOCHECKBOX)
return;
}
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, nIndex, 0);
if (lResult != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)lResult;
if (pState == NULL)
pState = new AFX_CHECK_DATA;
pState->m_nCheck = nCheck;
VERIFY(DefWindowProc(LB_SETITEMDATA, nIndex, (LPARAM)pState) != LB_ERR);
InvalidateCheck(nIndex);
}
}
int CCheckListBox::GetCheck(int nIndex)
{
ASSERT(::IsWindow(m_hWnd));
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, nIndex, 0);
if (lResult != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)lResult;
if (pState != NULL)
return pState->m_nCheck;
}
return 0; // The default
}
void CCheckListBox::Enable(int nIndex, BOOL bEnabled)
{
ASSERT(::IsWindow(m_hWnd));
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, nIndex, 0);
if (lResult != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)lResult;
if (pState == NULL)
pState = new AFX_CHECK_DATA;
pState->m_bEnabled = bEnabled;
VERIFY(DefWindowProc(LB_SETITEMDATA, nIndex, (LPARAM)pState) != LB_ERR);
InvalidateItem(nIndex);
}
}
int CCheckListBox::IsEnabled(int nIndex)
{
ASSERT(::IsWindow(m_hWnd));
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, nIndex, 0);
if (lResult != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)lResult;
if (pState != NULL)
return pState->m_bEnabled;
}
return TRUE; // The default
}
CRect CCheckListBox::OnGetCheckPosition(CRect, CRect rectCheckBox)
{
return rectCheckBox;
}
void CCheckListBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
// You must override DrawItem and MeasureItem for LBS_OWNERDRAWVARIABLE
ASSERT((GetStyle() & (LBS_OWNERDRAWFIXED | LBS_HASSTRINGS)) ==
(LBS_OWNERDRAWFIXED | LBS_HASSTRINGS));
CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
if (((LONG)(lpDrawItemStruct->itemID) >= 0) &&
(lpDrawItemStruct->itemAction & (ODA_DRAWENTIRE | ODA_SELECT)))
{
int cyItem = GetItemHeight(lpDrawItemStruct->itemID);
BOOL fDisabled = !IsWindowEnabled() || !IsEnabled(lpDrawItemStruct->itemID);
COLORREF newTextColor = fDisabled ?
RGB(0x80, 0x80, 0x80) : GetSysColor(COLOR_WINDOWTEXT); // light gray
COLORREF oldTextColor = pDC->SetTextColor(newTextColor);
COLORREF newBkColor = GetSysColor(COLOR_WINDOW);
COLORREF oldBkColor = pDC->SetBkColor(newBkColor);
if (newTextColor == newBkColor)
newTextColor = RGB(0xC0, 0xC0, 0xC0); // dark gray
if (!fDisabled && ((lpDrawItemStruct->itemState & ODS_SELECTED) != 0))
{
pDC->SetTextColor(GetSysColor(COLOR_HIGHLIGHTTEXT));
pDC->SetBkColor(GetSysColor(COLOR_HIGHLIGHT));
}
if (m_cyText == 0)
VERIFY(cyItem >= CalcMinimumItemHeight());
CString strText;
GetText(lpDrawItemStruct->itemID, strText);
pDC->ExtTextOut(lpDrawItemStruct->rcItem.left,
lpDrawItemStruct->rcItem.top + max(0, (cyItem - m_cyText) / 2),
ETO_OPAQUE, &(lpDrawItemStruct->rcItem), strText, strText.GetLength(), NULL);
pDC->SetTextColor(oldTextColor);
pDC->SetBkColor(oldBkColor);
}
if ((lpDrawItemStruct->itemAction & ODA_FOCUS) != 0)
pDC->DrawFocusRect(&(lpDrawItemStruct->rcItem));
}
void CCheckListBox::MeasureItem(LPMEASUREITEMSTRUCT)
{
// You must override DrawItem and MeasureItem for LBS_OWNERDRAWVARIABLE
ASSERT((GetStyle() & (LBS_OWNERDRAWFIXED | LBS_HASSTRINGS)) ==
(LBS_OWNERDRAWFIXED | LBS_HASSTRINGS));
}
void CCheckListBox::PreDrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
_AFX_CHECKLIST_STATE* pChecklistState = _afxChecklistState;
DRAWITEMSTRUCT drawItem;
memcpy(&drawItem, lpDrawItemStruct, sizeof(DRAWITEMSTRUCT));
if ((((LONG)drawItem.itemID) >= 0) &&
((drawItem.itemAction & (ODA_DRAWENTIRE | ODA_SELECT)) != 0))
{
int cyItem = GetItemHeight(drawItem.itemID);
CDC* pDC = CDC::FromHandle(drawItem.hDC);
COLORREF newBkColor = GetSysColor(COLOR_WINDOW);
BOOL fDisabled = !IsWindowEnabled() || !IsEnabled(drawItem.itemID);
if ((drawItem.itemState & ODS_SELECTED) && !fDisabled)
newBkColor = GetSysColor(COLOR_HIGHLIGHT);
COLORREF oldBkColor = pDC->SetBkColor(newBkColor);
CDC bitmapDC;
if (bitmapDC.CreateCompatibleDC(pDC))
{
int nCheck = GetCheck(drawItem.itemID);
HBITMAP hOldBitmap = (HBITMAP)::SelectObject(bitmapDC.m_hDC, pChecklistState->m_hbitmapCheck);
CRect rectCheck = drawItem.rcItem;
rectCheck.left += 1;
rectCheck.top += 1 + max(0, (cyItem - pChecklistState->m_sizeCheck.cy) / 2);
rectCheck.right = rectCheck.left + pChecklistState->m_sizeCheck.cx;
rectCheck.bottom = rectCheck.top + pChecklistState->m_sizeCheck.cy;
CRect rectItem = drawItem.rcItem;
rectItem.right = rectItem.left + pChecklistState->m_sizeCheck.cx + 2;
CRect rectCheckBox = OnGetCheckPosition(rectItem, rectCheck);
ASSERT(rectCheck.IntersectRect(rectItem, rectCheckBox));
ASSERT((rectCheck == rectCheckBox) && (rectCheckBox.Size() == pChecklistState->m_sizeCheck));
CBrush brush(newBkColor);
pDC->FillRect(rectItem, &brush);
pDC->BitBlt(rectCheckBox.left, rectCheckBox.top,
pChecklistState->m_sizeCheck.cx, pChecklistState->m_sizeCheck.cy, &bitmapDC,
pChecklistState->m_sizeCheck.cx * nCheck, 0, SRCCOPY);
::SelectObject(bitmapDC.m_hDC, hOldBitmap);
}
pDC->SetBkColor(oldBkColor);
}
if (drawItem.itemData != 0 && drawItem.itemData != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)drawItem.itemData;
drawItem.itemData = pState->m_dwUserData;
}
drawItem.rcItem.left = drawItem.rcItem.left + pChecklistState->m_sizeCheck.cx + 2;
DrawItem(&drawItem);
}
void CCheckListBox::PreMeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
int cyItem = CalcMinimumItemHeight();
MEASUREITEMSTRUCT measureItem;
memcpy(&measureItem, lpMeasureItemStruct, sizeof(MEASUREITEMSTRUCT));
measureItem.itemHeight = cyItem;
measureItem.itemWidth = (UINT)-1;
// WINBUG: Windows95 and Windows NT disagree on what this value
// should be. According to the docs, they are both wrong
if (GetStyle() & LBS_OWNERDRAWVARIABLE)
{
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, measureItem.itemID, 0);
if (lResult != LB_ERR)
measureItem.itemData = (UINT)lResult;
else
measureItem.itemData = 0;
// WINBUG: This is only done in the LBS_OWNERDRAWVARIABLE case
// because Windows 95 does not initialize itemData to zero in the
// case of LBS_OWNERDRAWFIXED list boxes (it is stack garbage).
if (measureItem.itemData != 0 && measureItem.itemData != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)measureItem.itemData;
measureItem.itemData = pState->m_dwUserData;
}
}
MeasureItem(&measureItem);
lpMeasureItemStruct->itemHeight = max(measureItem.itemHeight,(UINT) cyItem);
lpMeasureItemStruct->itemWidth = measureItem.itemWidth;
}
int CCheckListBox::PreCompareItem(LPCOMPAREITEMSTRUCT lpCompareItemStruct)
{
COMPAREITEMSTRUCT compareItem;
memcpy(&compareItem, lpCompareItemStruct, sizeof(COMPAREITEMSTRUCT));
if (compareItem.itemData1 != 0 && compareItem.itemData1 != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)compareItem.itemData1;
compareItem.itemData1 = pState->m_dwUserData;
}
if (compareItem.itemData2 != 0 && compareItem.itemData2 != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)compareItem.itemData2;
compareItem.itemData2 = pState->m_dwUserData;
}
return CompareItem(&compareItem);
}
void CCheckListBox::PreDeleteItem(LPDELETEITEMSTRUCT lpDeleteItemStruct)
{
DELETEITEMSTRUCT deleteItem;
memcpy(&deleteItem, lpDeleteItemStruct, sizeof(DELETEITEMSTRUCT));
// WINBUG: The following if block is required because Windows NT
// version 3.51 does not properly fill out the LPDELETEITEMSTRUCT.
if (deleteItem.itemData == 0)
{
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, deleteItem.itemID, 0);
if (lResult != LB_ERR)
deleteItem.itemData = (UINT)lResult;
}
if (deleteItem.itemData != 0 && deleteItem.itemData != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)deleteItem.itemData;
deleteItem.itemData = pState->m_dwUserData;
delete pState;
}
DeleteItem(&deleteItem);
}
BOOL CCheckListBox::OnChildNotify(UINT message, WPARAM wParam, LPARAM lParam,
LRESULT* pResult)
{
switch (message)
{
case WM_DRAWITEM:
ASSERT(pResult == NULL); // no return value expected
PreDrawItem((LPDRAWITEMSTRUCT)lParam);
break;
case WM_MEASUREITEM:
ASSERT(pResult == NULL); // no return value expected
PreMeasureItem((LPMEASUREITEMSTRUCT)lParam);
break;
case WM_COMPAREITEM:
ASSERT(pResult != NULL); // return value expected
*pResult = PreCompareItem((LPCOMPAREITEMSTRUCT)lParam);
break;
case WM_DELETEITEM:
ASSERT(pResult == NULL); // no return value expected
PreDeleteItem((LPDELETEITEMSTRUCT)lParam);
break;
default:
return CListBox::OnChildNotify(message, wParam, lParam, pResult);
}
return TRUE;
}
#ifdef _DEBUG
void CCheckListBox::PreSubclassWindow()
{
CListBox::PreSubclassWindow();
// CCheckListBoxes must be owner drawn
ASSERT(GetStyle() & (LBS_OWNERDRAWFIXED | LBS_OWNERDRAWVARIABLE));
}
#endif
int CCheckListBox::CalcMinimumItemHeight()
{
int nResult;
_AFX_CHECKLIST_STATE* pChecklistState = _afxChecklistState;
if ((GetStyle() & (LBS_HASSTRINGS | LBS_OWNERDRAWFIXED)) ==
(LBS_HASSTRINGS | LBS_OWNERDRAWFIXED))
{
CClientDC dc(this);
CFont* pOldFont = dc.SelectObject(GetFont());
TEXTMETRIC tm;
VERIFY (dc.GetTextMetrics ( &tm ));
dc.SelectObject(pOldFont);
m_cyText = tm.tmHeight;
nResult = max(pChecklistState->m_sizeCheck.cy + 1, m_cyText);
}
else
{
nResult = pChecklistState->m_sizeCheck.cy + 1;
}
return nResult;
}
void CCheckListBox::InvalidateCheck(int nIndex)
{
CRect rect;
_AFX_CHECKLIST_STATE* pChecklistState = _afxChecklistState;
GetItemRect(nIndex, rect);
rect.right = rect.left + pChecklistState->m_sizeCheck.cx + 2;
InvalidateRect(rect, FALSE);
}
void CCheckListBox::InvalidateItem(int nIndex)
{
CRect rect;
GetItemRect(nIndex, rect);
InvalidateRect(rect, FALSE);
}
int CCheckListBox::CheckFromPoint(CPoint point, BOOL& bInCheck)
{
// assume did not hit anything
bInCheck = FALSE;
int nIndex = -1;
_AFX_CHECKLIST_STATE* pChecklistState = _afxChecklistState;
if ((GetStyle() & (LBS_OWNERDRAWFIXED|LBS_MULTICOLUMN)) == LBS_OWNERDRAWFIXED)
{
// optimized case for ownerdraw fixed, single column
int cyItem = GetItemHeight(0);
if (point.y < cyItem * GetCount())
{
nIndex = GetTopIndex() + point.y / cyItem;
if (point.x < pChecklistState->m_sizeCheck.cx + 2)
++bInCheck;
}
}
else
{
// general case for ownerdraw variable or multiple column
for (int i = GetTopIndex(); i < GetCount(); i++)
{
CRect itemRect;
GetItemRect(i, &itemRect);
if (itemRect.PtInRect(point))
{
nIndex = i;
if (point.x < itemRect.left + pChecklistState->m_sizeCheck.cx + 2)
++bInCheck;
break;
}
}
}
return nIndex;
}
void CCheckListBox::SetSelectionCheck( int nCheck )
{
int* piSelectedItems;
int nSelectedItems;
int iSelectedItem;
nSelectedItems = GetSelCount();
if( nSelectedItems > 0 )
{
piSelectedItems = (int*)_alloca( nSelectedItems*sizeof( int ) );
GetSelItems( nSelectedItems, piSelectedItems );
for( iSelectedItem = 0; iSelectedItem < nSelectedItems; iSelectedItem++ )
{
if( IsEnabled( piSelectedItems[iSelectedItem] ) )
{
SetCheck( piSelectedItems[iSelectedItem], nCheck );
InvalidateCheck( piSelectedItems[iSelectedItem] );
}
}
}
}
void CCheckListBox::OnLButtonDown(UINT nFlags, CPoint point)
{
SetFocus();
// determine where the click is
BOOL bInCheck;
int nIndex = CheckFromPoint(point, bInCheck);
// if the item is disabled, then eat the click
if (!IsEnabled(nIndex))
return;
if (m_nStyle != BS_CHECKBOX && m_nStyle != BS_3STATE)
{
// toggle the check mark automatically if the check mark was hit
if (bInCheck)
{
CWnd* pParent = GetParent();
ASSERT_VALID( pParent );
int nModulo = (m_nStyle == BS_AUTO3STATE) ? 3 : 2;
int nCheck;
int nNewCheck;
nCheck = GetCheck( nIndex );
nCheck = (nCheck == nModulo) ? nCheck-1 : nCheck;
nNewCheck = (nCheck+1)%nModulo;
SetCheck( nIndex, nNewCheck );
InvalidateCheck( nIndex );
if( (GetStyle()&(LBS_EXTENDEDSEL|LBS_MULTIPLESEL)) && GetSel(
nIndex ) )
{
// The listbox is a multi-select listbox, and the user clicked on
// a selected check, so change the check on all of the selected
// items.
SetSelectionCheck( nNewCheck );
}
else
{
CListBox::OnLButtonDown( nFlags, point );
}
// Inform parent of check
pParent->SendMessage( WM_COMMAND, MAKEWPARAM( GetDlgCtrlID(),
CLBN_CHKCHANGE ), (LPARAM)m_hWnd );
return;
}
}
// do default listbox selection logic
CListBox::OnLButtonDown( nFlags, point );
}
void CCheckListBox::OnLButtonDblClk(UINT nFlags, CPoint point)
{
BOOL bInCheck;
CheckFromPoint(point, bInCheck);
if (bInCheck)
{
// Double and single clicks act the same on the check box!
OnLButtonDown(nFlags, point);
return;
}
CListBox::OnLButtonDblClk(nFlags, point);
}
void CCheckListBox::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
if (nChar == VK_SPACE)
{
int nIndex = GetCaretIndex();
CWnd* pParent = GetParent();
ASSERT_VALID(pParent);
if (nIndex != LB_ERR)
{
if (m_nStyle != BS_CHECKBOX && m_nStyle != BS_3STATE)
{
if ((GetStyle() & LBS_MULTIPLESEL) != 0)
{
if (IsEnabled(nIndex))
{
BOOL bSelected = GetSel(nIndex);
if (bSelected)
{
int nModulo = (m_nStyle == BS_AUTO3STATE) ? 3 : 2;
int nCheck = GetCheck(nIndex);
nCheck = (nCheck == nModulo) ? nCheck - 1 : nCheck;
SetCheck(nIndex, (nCheck + 1) % nModulo);
// Inform of check
pParent->SendMessage(WM_COMMAND,
MAKEWPARAM(GetDlgCtrlID(), CLBN_CHKCHANGE),
(LPARAM)m_hWnd);
}
SetSel(nIndex, !bSelected);
}
else
SetSel(nIndex, FALSE); // unselect disabled items
return;
}
else
{
// If there is a selection, the space bar toggles that check,
// all other keys are the same as a standard listbox.
if (IsEnabled(nIndex))
{
int nModulo = (m_nStyle == BS_AUTO3STATE) ? 3 : 2;
int nCheck = GetCheck(nIndex);
nCheck = (nCheck == nModulo) ? nCheck - 1 : nCheck;
int nNewCheck = (nCheck+1)%nModulo;
SetCheck(nIndex, nNewCheck);
InvalidateCheck(nIndex);
if( GetStyle()&LBS_EXTENDEDSEL )
{
// The listbox is a multi-select listbox, and the user
// clicked on a selected check, so change the check on all
// of the selected items.
SetSelectionCheck( nNewCheck );
}
// Inform of check
pParent->SendMessage(WM_COMMAND,
MAKEWPARAM(GetDlgCtrlID(), CLBN_CHKCHANGE),
(LPARAM)m_hWnd);
}
else
SetSel(nIndex, FALSE); // unselect disabled items
return;
}
}
}
}
CListBox::OnKeyDown(nChar, nRepCnt, nFlags);
}
int CCheckListBox::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CListBox::OnCreate(lpCreateStruct) == -1)
return -1;
if ((GetStyle() & (LBS_OWNERDRAWFIXED | LBS_HASSTRINGS))
== (LBS_OWNERDRAWFIXED | LBS_HASSTRINGS))
SetItemHeight(0, CalcMinimumItemHeight());
return 0;
}
LRESULT CCheckListBox::OnSetFont(WPARAM , LPARAM)
{
Default();
if ((GetStyle() & (LBS_OWNERDRAWFIXED | LBS_HASSTRINGS))
== (LBS_OWNERDRAWFIXED | LBS_HASSTRINGS))
SetItemHeight(0, CalcMinimumItemHeight());
return 0;
}
LRESULT CCheckListBox::OnLBAddString(WPARAM wParam, LPARAM lParam)
{
AFX_CHECK_DATA* pState = NULL;
if (!(GetStyle() & LBS_HASSTRINGS))
{
pState = new AFX_CHECK_DATA;
pState->m_dwUserData = lParam;
lParam = (LPARAM)pState;
}
LRESULT lResult = DefWindowProc(LB_ADDSTRING, wParam, lParam);
if (lResult == LB_ERR && pState != NULL)
delete pState;
return lResult;
}
LRESULT CCheckListBox::OnLBFindString(WPARAM wParam, LPARAM lParam)
{
if (GetStyle() & LBS_HASSTRINGS)
return DefWindowProc(LB_FINDSTRING, wParam, lParam);
int nIndex = wParam;
if (nIndex == -1) nIndex = 0;
for(; nIndex < GetCount(); nIndex++)
if ((DWORD)lParam == GetItemData(nIndex))
return nIndex;
return LB_ERR;
}
LRESULT CCheckListBox::OnLBFindStringExact(WPARAM wParam, LPARAM lParam)
{
if (GetStyle() & (LBS_HASSTRINGS | LBS_SORT))
return DefWindowProc(LB_FINDSTRINGEXACT, wParam, lParam);
int nIndex = wParam;
if (nIndex == -1) nIndex = 0;
for(; nIndex < GetCount(); nIndex++)
if ((DWORD)lParam == GetItemData(nIndex))
return nIndex;
return LB_ERR;
}
LRESULT CCheckListBox::OnLBGetItemData(WPARAM wParam, LPARAM lParam)
{
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, wParam, lParam);
if (lResult != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)lResult;
if (pState == NULL)
return 0; // default
lResult = pState->m_dwUserData;
}
return lResult;
}
LRESULT CCheckListBox::OnLBGetText(WPARAM wParam, LPARAM lParam)
{
LRESULT lResult = DefWindowProc(LB_GETTEXT, wParam, lParam);
if (GetStyle() & LBS_HASSTRINGS)
return lResult;
if (lResult != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)lParam;
if (pState != NULL)
lParam = pState->m_dwUserData;
}
return lResult;
}
LRESULT CCheckListBox::OnLBInsertString(WPARAM wParam, LPARAM lParam)
{
AFX_CHECK_DATA* pState = NULL;
if (!(GetStyle() & LBS_HASSTRINGS))
{
pState = new AFX_CHECK_DATA;
pState->m_dwUserData = lParam;
lParam = (LPARAM)pState;
}
LRESULT lResult = DefWindowProc(LB_INSERTSTRING, wParam, lParam);
if (lResult == LB_ERR && pState != NULL)
delete pState;
return lResult;
}
LRESULT CCheckListBox::OnLBSelectString(WPARAM wParam, LPARAM lParam)
{
if (GetStyle() & LBS_HASSTRINGS)
return DefWindowProc(LB_SELECTSTRING, wParam, lParam);
int nIndex = wParam;
if (nIndex == -1) nIndex = 0;
for(; nIndex < GetCount(); nIndex++)
if ((DWORD)lParam == GetItemData(nIndex))
{
SetCurSel(nIndex);
return nIndex;
}
return LB_ERR;
}
LRESULT CCheckListBox::OnLBSetItemData(WPARAM wParam, LPARAM lParam)
{
LRESULT lResult = DefWindowProc(LB_GETITEMDATA, wParam, 0);
if (lResult != LB_ERR)
{
AFX_CHECK_DATA* pState = (AFX_CHECK_DATA*)lResult;
if (pState == NULL)
pState = new AFX_CHECK_DATA;
pState->m_dwUserData = lParam;
lResult = DefWindowProc(LB_SETITEMDATA, wParam, (LPARAM)pState);
if (lResult == LB_ERR)
delete pState;
}
return lResult;
}
LRESULT CCheckListBox::OnLBSetItemHeight(WPARAM wParam, LPARAM lParam)
{
int nHeight = max(CalcMinimumItemHeight(),(int)LOWORD(lParam));
return DefWindowProc(LB_SETITEMHEIGHT, wParam, MAKELPARAM(nHeight,0));
}
#ifdef AFX_INIT_SEG
#pragma code_seg(AFX_INIT_SEG)
#endif
IMPLEMENT_DYNAMIC(CCheckListBox, CListBox)
#pragma warning(disable: 4074)
#pragma init_seg(lib)
PROCESS_LOCAL(_AFX_CHECKLIST_STATE, _afxChecklistState)
/////////////////////////////////////////////////////////////////////////////