Can Some one help me to Add a ScroolBar to the CCtrlListWnd
hello every one.
I write a Ctrl,named CCtrlListWnd,which is derived from CWnd. and i want to
know how to add a ScroolBar to the CCtrlListWnd.
Can some one help me.Thanks for your attention and suggestion.
The code is below:
/********************************************************************************************/
// Author: sound_of_nature
// Email: sound_of_nature@hotmail.com
// Verion: 1.0
// Date: 5/12/2008
/********************************************************************************************/
// CtrlListWnd.h : header file
//
#pragma once
#define WM_ITEMCHANGED WM_USER+10
#define MIN_HEIGHT 18
enum ItemCtrlType{EditCTL,PICCTL,ListCTL,LinkCtl};
///////////////////////////////////////////////////////////////////////////////////////
//ITEM
////
class ITEMINFOR
{
public:
ItemCtrlType m_ctlType;
unsigned int m_nPos;
int m_nHeight;
DWORD m_nStyle;
public:
ITEMINFOR& operator=(ITEMINFOR itemInfo)
{
m_ctlType = itemInfo.m_ctlType;
m_nHeight = itemInfo.m_nHeight;
m_nPos = itemInfo.m_nPos;
m_nStyle = itemInfo.m_nStyle;
return (*(ITEMINFOR*)this);
};
};
class ITEM
{
public:
ITEM()
{
m_ctlType = EditCTL;
m_nPos = 0;
m_nHeight = MIN_HEIGHT;
m_pControl = NULL;
};
~ITEM()
{
delete m_pControl;
m_pControl = NULL;
};
public:
ItemCtrlType m_ctlType;
unsigned int m_nPos;
int m_nHeight;
CWnd *m_pControl;
};
//////////////////////////////////////////////////////////////////////////////////////
// CExtensibleEdit
////
class CExtensibleEdit : public CEdit
{
DECLARE_DYNAMIC(CExtensibleEdit)
public:
CExtensibleEdit();
virtual ~CExtensibleEdit();
protected:
DECLARE_MESSAGE_MAP()
protected:
afx_msg void OnEnUpdate();
protected:
virtual void PreSubclassWindow();
public:
ITEMINFOR m_ItemInfo;
};
////////////////////////////////////////////////////////////////////////////////////////
// CCtrlListWnd
////
class CCtrlListWnd : public CWnd
{
DECLARE_DYNAMIC(CCtrlListWnd)
public:
CMap <unsigned int,unsigned int ,ITEM* ,ITEM* > m_mapItem;
CCtrlListWnd();
virtual ~CCtrlListWnd();
protected:
DECLARE_MESSAGE_MAP()
public:
ITEM *CreateControl(ITEMINFOR* lpItemInfo);
BOOL InsertItem(ITEMINFOR* lpItemInfo);
void RepositionItems(ITEMINFOR *pItemInfor);
afx_msg LRESULT OnItemChanged(WPARAM wParam,LPARAM lParam);
public:
virtual BOOL Create(LPCTSTR lpszWindowName, DWORD dwStyle, const RECT&
rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext = NULL);
};
/********************************************************************************************/
// Author: sound_of_nature
// Email: sound_of_nature@hotmail.com
// Verion: 1.0
// Date: 5/12/2008
/********************************************************************************************/
// CtrlListWnd.cpp : implementation file
//
#include "stdafx.h"
#include "WndEX.h"
/////////////////////////////////////////////////////////////////////////////////////////////
// CExtensibleEdit
////
IMPLEMENT_DYNAMIC(CExtensibleEdit, CEdit)
CExtensibleEdit::CExtensibleEdit()
{
}
CExtensibleEdit::~CExtensibleEdit()
{
}
BEGIN_MESSAGE_MAP(CExtensibleEdit, CEdit)
ON_CONTROL_REFLECT(EN_UPDATE, &CExtensibleEdit::OnEnUpdate)
END_MESSAGE_MAP()
// CExtensibleEdit message handlers
void CExtensibleEdit::OnEnUpdate()
{
CClientDC dc(this);
//get the size of the text
CFont *pOldFont = dc.SelectObject(GetFont());
CString Str;
GetWindowText(Str);
CSize sizeText = dc.GetTextExtent(Str);
long TextHeight = sizeText.cy;
dc.SelectObject(pOldFont);
//get the inside size of the edit
CRect Rect;
GetRect(&Rect);
//get the external size of the edit
CRect wRect;
GetWindowRect(&wRect);
sizeText.cy *= GetLineCount();
CRect rcParentClient;
GetParent()->GetClientRect(rcParentClient);
Rect.bottom = Rect.top+sizeText.cy+MIN_HEIGHT;
Rect.right = Rect.left+rcParentClient.Width();
CalcWindowRect(&Rect);
m_ItemInfo.m_nHeight = Rect.Height();
TRACE("OldHeight=%d,NewHeight=%d\n",wRect.Height(), Rect.Height());
if(wRect.Height() != Rect.Height())
{
::SendMessage(GetParent()->GetSafeHwnd(),WM_ITEMCHANGED,(WPARAM)(this),(LPARAM)(&m_ItemInfo));
}
}
void CExtensibleEdit::PreSubclassWindow()
{
ASSERT( (GetStyle() & ES_AUTOHSCROLL) == 0);
CEdit::PreSubclassWindow();
}
//////////////////////////////////////////////////////////////////////////////////////
// CCtrlListWnd
////
IMPLEMENT_DYNAMIC(CCtrlListWnd, CWnd)
CCtrlListWnd::CCtrlListWnd()
{
}
CCtrlListWnd::~CCtrlListWnd()
{
POSITION pos = m_mapItem.GetStartPosition();
unsigned int nkey;
ITEM* pItem = NULL;
while (pos != NULL)
{
m_mapItem.GetNextAssoc(pos, nkey, pItem);
delete pItem;
pItem = NULL;
}
}
BEGIN_MESSAGE_MAP(CCtrlListWnd, CWnd)
ON_MESSAGE(WM_ITEMCHANGED,OnItemChanged)
END_MESSAGE_MAP()
// CCtrlListWnd message handlers
ITEM *CCtrlListWnd::CreateControl(ITEMINFOR* lpItemInfo)
{
if (lpItemInfo==NULL)return NULL;
ITEM *lpItem = new ITEM;
if (lpItem == NULL)return NULL;
switch (lpItemInfo->m_ctlType)
{
case EditCTL:
{
CExtensibleEdit *pCtl = new CExtensibleEdit;
if (pCtl!=NULL)
{
CRect rcClient;
GetClientRect(rcClient);
if (!pCtl->Create(ES_MULTILINE | WS_CHILD | WS_VISIBLE | WS_TABSTOP |
WS_BORDER
|lpItemInfo->m_nStyle&~ES_AUTOHSCROLL|ES_AUTOVSCROLL,CRect(0,0,rcClient.Width(),30),this,lpItemInfo->m_nPos))
{
delete lpItem;
lpItem = NULL;
delete pCtl;
pCtl = NULL;
}else
{
lpItemInfo->m_nHeight =
(lpItemInfo->m_nHeight>MIN_HEIGHT)?lpItemInfo->m_nHeight:MIN_HEIGHT;
pCtl->m_ItemInfo = (*lpItemInfo);
lpItem->m_ctlType = EditCTL;
lpItem->m_nHeight = lpItemInfo->m_nHeight;
lpItem->m_nPos = lpItemInfo->m_nPos;
lpItem->m_pControl = pCtl;
return lpItem;
}
}
}
break;
case PICCTL:
break;
case ListCTL:
break;
case LinkCtl:
break;
}
return NULL;
}
BOOL CCtrlListWnd::InsertItem(ITEMINFOR* lpItemInfo)
{
ITEM *lpItem = CreateControl(lpItemInfo);
if(lpItem==NULL)return FALSE;
ITEM *tpItem = NULL;
unsigned int ipos = lpItem->m_nPos;
unsigned int size = m_mapItem.GetSize();
if(ipos==-1)
{
lpItemInfo->m_nPos = size;
lpItem->m_nPos = size;
m_mapItem[size]=lpItem;
OnItemChanged((WPARAM)lpItem->m_pControl,(LPARAM)lpItemInfo);
return TRUE;
}
m_mapItem.Lookup(ipos,tpItem);
if(tpItem==NULL)
{
m_mapItem[ipos]=lpItem;
}else
{
for(unsigned int ct = size;ct>ipos;ct--)
{
m_mapItem.Lookup(ct-1,tpItem);
m_mapItem[ct]=tpItem;
}
m_mapItem[ipos]=lpItem;
}
OnItemChanged((WPARAM)lpItem->m_pControl,(LPARAM)lpItemInfo);
return TRUE;
}
void CCtrlListWnd::RepositionItems(ITEMINFOR *pItemInfor)
{
unsigned int size = m_mapItem.GetSize();
if (size<=0)return ;
CRect rcParentWindow;
CWnd *pParentWnd = GetParent();
ENSURE(pParentWnd!=NULL);
pParentWnd->GetClientRect(rcParentWindow);
unsigned int cx = rcParentWindow.Width();
unsigned int cy = rcParentWindow.Height();
unsigned int nWndHeight = 1;
CRect rcReDraw;
//LockWindowUpdate();
for(unsigned int ct =0;ct<size;ct++)
{
ITEM *tpItem = NULL;
m_mapItem.Lookup(ct,tpItem);
ENSURE(tpItem!=NULL);
ENSURE(tpItem->m_pControl!=NULL);
if (ct<pItemInfor->m_nPos)
{
nWndHeight+=tpItem->m_nHeight+1;
}else if (ct==pItemInfor->m_nPos)
{
tpItem->m_nHeight = pItemInfor->m_nHeight;
tpItem->m_pControl->SetWindowPos(this,-2,nWndHeight++,cx+4,pItemInfor->m_nHeight,SWP_SHOWWINDOW|SWP_NOZORDER);
rcReDraw.top = nWndHeight;
nWndHeight+=pItemInfor->m_nHeight;
}else
{
tpItem->m_pControl->SetWindowPos(this,-2,nWndHeight++,cx+4,tpItem->m_nHeight,SWP_NOSIZE|SWP_SHOWWINDOW|SWP_NOZORDER);
nWndHeight+=tpItem->m_nHeight;
}
}
SetWindowPos(pParentWnd,0,0,cx,max(nWndHeight,cy),SWP_NOMOVE|SWP_SHOWWINDOW|SWP_NOZORDER); //UnlockWindowUpdate(); CRect rcClient; GetClientRect(rcClient); rcReDraw.left = rcClient.left; rcReDraw.right = rcClient.right; rcReDraw.bottom = rcClient.bottom; InvalidateRect(&rcReDraw); UpdateWindow();}LRESULT CCtrlListWnd::OnItemChanged(WPARAM wParam,LPARAM lParam){ CWnd *pWnd = (CWnd*)wParam; ENSURE(pWnd!=NULL); ITEMINFOR *pItemInfor = (ITEMINFOR *)lParam; ENSURE(pItemInfor!=NULL); if (pItemInfor->m_nHeight<=0)return 1; RepositionItems(pItemInfor); return 0;}BOOL CCtrlListWnd::Create(LPCTSTR lpszWindowName, DWORD dwStyle, const RECT&rect, CWnd* pParentWnd, UINT nID, CCreateContext* pContext){ // TODO: Add your specialized code here and/or call the base class CString strMyClass = AfxRegisterWndClass( CS_VREDRAW | CS_HREDRAW, ::LoadCursor(NULL, IDC_ARROW), (HBRUSH) ::GetStockObject(WHITE_BRUSH), ::LoadIcon(NULL, IDI_APPLICATION)); return CWnd::Create(strMyClass, lpszWindowName,WS_VISIBLE|WS_CHILD|dwStyle, rect, pParentWnd, nID, pContext);}