www.pudn.com > ListCtrlSBHideProject.rar > ListCtrlHiddenSB.cpp

// ListCtrlHiddenSB.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "CListCtrlExample.h" 
#include "ListCtrlHiddenSB.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CListCtrlHiddenSB 
 
CListCtrlHiddenSB::CListCtrlHiddenSB() 
{ 
	NCOverride=FALSE; //False as default... 
	Who=SB_BOTH; //Default remove both... 
} 
 
CListCtrlHiddenSB::~CListCtrlHiddenSB() 
{ 
} 
 
BEGIN_MESSAGE_MAP(CListCtrlHiddenSB, CListCtrl) 
	//{{AFX_MSG_MAP(CListCtrlHiddenSB) 
	ON_WM_NCCALCSIZE() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CListCtrlHiddenSB message handlers 
 
//**************************************************************************************** 
 
void CListCtrlHiddenSB::HideScrollBars(int Type, int Which) 
{ 
	if(Type==LCSB_CLIENTDATA) //This is the clientrect function 
	{ 
		RECT ierect; 
		int cxvs, cyvs; 
		GetClientRect(&ierect); //Get client width and height 
 
		cxvs = GetSystemMetrics (SM_CXVSCROLL); //Get the system metrics - VERT 
		cyvs = GetSystemMetrics (SM_CYVSCROLL); //Get the system metrics - HORZ 
		 
		if(Which==SB_HORZ) cxvs=0; //Set VERT to zero when choosen HORZ 
		if(Which==SB_VERT) cyvs=0; //Set HORZ to zero when choosen VERT 
 
		//Here we set the position of the window to the clientrect + the size of the scrollbars 
		SetWindowPos(NULL, ierect.left, ierect.top, ierect.right+cxvs, ierect.bottom+cyvs, SWP_NOMOVE | SWP_NOZORDER); 
 
		//Her we modify the rect so the right part is subbed from the rect. 
		if(Which==SB_BOTH||Which==SB_HORZ) ierect.bottom -= ierect.top; 
		if(Which==SB_BOTH||Which==SB_VERT) ierect.right -= ierect.left; 
 
		//Just to be safe that the left/top corner is 0... 
		ierect.top = 0; 
		ierect.left = 0; 
		 
		HRGN iehrgn = NULL; //This range is created base on which scrollbar that is going to be removed! 
 
		//The -2 is probably a border of some kind that we also need to remove. I could not find any good 
		//metrics that gave me an 2 as an answer. So insted we makes it static with -2. 
		if(Which==SB_BOTH) iehrgn=CreateRectRgn (ierect.left, ierect.top, ierect.right-2, ierect.bottom-2); 
		if(Which==SB_HORZ) iehrgn=CreateRectRgn (ierect.left, ierect.top, ierect.right, ierect.bottom-2); 
		if(Which==SB_VERT) iehrgn=CreateRectRgn (ierect.left, ierect.top, ierect.right-2, ierect.bottom); 
		 
		//After the range has been made we add it... 
		SetWindowRgn (iehrgn, TRUE); 
 
		//Reset of NCOverride 
		NCOverride=FALSE; 
	} 
 
	if(Type==LCSB_NCOVERRIDE) //This is the NcCalcSize override 
	{ 
		NCOverride=TRUE; //Set to true, so we run the code on each OnNcCalcSize. 
		Who=Which; //Selects which scrollbars to get hidden. 
	} 
} 
 
//**************************************************************************************** 
 
void CListCtrlHiddenSB::OnNcCalcSize(BOOL bCalcValidRects, NCCALCSIZE_PARAMS FAR* lpncsp)  
{ 
	// TODO: Add your message handler code here and/or call default 
 
	if(NCOverride==TRUE) //If the NCOverride is true we remove each time the CListCtrl calc its rect. 
	{ 
		  if(Who==SB_HORZ) ModifyStyle(WS_HSCROLL ,0,0); //Just by modifing the style we remove the scrollbar 
		  if(Who==SB_VERT) ModifyStyle(WS_VSCROLL,0,0); 
		  if(Who==SB_BOTH) ModifyStyle(WS_HSCROLL | WS_VSCROLL,0,0); 
	} 
 
	CListCtrl::OnNcCalcSize(bCalcValidRects, lpncsp); 
} 
 
//****************************************************************************************