xlistctrl.cpp

Sample for selecting the sub item in ListCtrl

// XListCtrl.cpp : implementation file
//

#include "stdafx.h"
#include "ListSubItSel.h"
#include "XListCtrl.h"

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

/////////////////////////////////////////////////////////////////////////////
// CXListCtrl

CXListCtrl::CXListCtrl()
{
	m_bCustomDraw=TRUE;
	m_sel_row=-1;
	m_sel_col=-1;
	m_nNumberOfRows=0;
	m_nNumberOfCols=0;
}

CXListCtrl::~CXListCtrl()
{
}


BEGIN_MESSAGE_MAP(CXListCtrl, CListCtrl)
	//{{AFX_MSG_MAP(CXListCtrl)
	ON_NOTIFY_REFLECT(NM_CLICK, OnClick)
	ON_NOTIFY_REFLECT(LVN_KEYDOWN, OnKeydown)
	//}}AFX_MSG_MAP
	ON_NOTIFY_REFLECT(NM_CUSTOMDRAW,custom_draw_funtion)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CXListCtrl message handlers

void CXListCtrl::custom_draw_funtion(NMHDR *pNMHDR, LRESULT *pResult)
{
	NMLVCUSTOMDRAW* nmcd=(NMLVCUSTOMDRAW*)pNMHDR;
	*pResult=CDRF_DODEFAULT;
	
	int row;
	int col;

	switch(nmcd->nmcd.dwDrawStage)
	{
		case CDDS_PREPAINT:
			if(m_bCustomDraw)
				*pResult=CDRF_NOTIFYITEMDRAW; // else CDRF_DODEFAULT which stops notyfication messages
			return;

		case CDDS_ITEMPREPAINT:
			*pResult=CDRF_NOTIFYSUBITEMDRAW;
			return;
		
		case CDDS_SUBITEM|CDDS_ITEMPREPAINT:
		{
			*pResult=0;

			row=nmcd->nmcd.dwItemSpec;
			col=nmcd->iSubItem;

			CString str=GetItemText(row,col);

			CRect rect;
			CDC* pDC=CDC::FromHandle(nmcd->nmcd.hdc);

			if(col>0)
				GetSubItemRect(row,col,LVIR_BOUNDS,rect);
			else
				GetItemRect(row,&rect,LVIR_LABEL);

			UINT uCode=DT_LEFT;
			
			if(row==m_sel_row && col==m_sel_col)
			{
				COLORREF kolor=0xaa00aa;

				if(GetFocus()==this)
					kolor=0x0000ff;

				CBrush brush(kolor);
				pDC->FillRect(&rect,&brush);
			}
			
			
			rect.OffsetRect(5,0);
			pDC->DrawText(str,&rect,uCode);
			
		
			*pResult=CDRF_SKIPDEFAULT;
			
			break;
		}
	}
}

void CXListCtrl::OnClick(NMHDR* pNMHDR, LRESULT* pResult) 
{
	NMITEMACTIVATE* nm=(NMITEMACTIVATE*)pNMHDR;
	
	invalidate_grid(m_sel_row,m_sel_col);
	m_sel_row=nm->iItem;
	m_sel_col=nm->iSubItem;
	invalidate_grid(m_sel_row,m_sel_col);
	
	*pResult = 0;
}

void CXListCtrl::OnKeydown(NMHDR* pNMHDR, LRESULT* pResult) 
{
	NMLVKEYDOWN* nmkd = (NMLVKEYDOWN*)pNMHDR;
	
	switch(nmkd->wVKey)
	{
		case VK_LEFT: 
			m_sel_col--;
			if(m_sel_col<0)
				m_sel_col=0;
			invalidate_grid(m_sel_row,m_sel_col+1);
			break;
		case VK_RIGHT:
			m_sel_col++;
			if(m_sel_col>m_nNumberOfCols-1)
				m_sel_col=m_nNumberOfCols-1;
			invalidate_grid(m_sel_row,m_sel_col-1);
			break;
		
		case VK_UP:   
			m_sel_row--;
			if(m_sel_row<0)
				m_sel_row=0;
			invalidate_grid(m_sel_row+1,m_sel_col);
			break;
		
		case VK_DOWN: 
			m_sel_row++;
			if(m_sel_row>m_nNumberOfRows-1)
				m_sel_row=m_nNumberOfRows-1;
			invalidate_grid(m_sel_row-1,m_sel_col);
			break;
		case VK_PRIOR:
			invalidate_grid(m_sel_row,m_sel_col);
			m_sel_row=0;
			break;
		case VK_NEXT:
			invalidate_grid(m_sel_row,m_sel_col);
			m_sel_row=m_nNumberOfRows-1;
			break;
		case VK_HOME:
			invalidate_grid(m_sel_row,m_sel_col);
			m_sel_col=0;

			if(GetKeyState(VK_CONTROL)<0)
				m_sel_row=0;

			SetItemState(m_sel_row,LVIS_FOCUSED,LVIS_FOCUSED);
			*pResult = CDRF_SKIPDEFAULT;
			invalidate_grid(m_sel_row,m_sel_col);
			return;
			break;
		case VK_END:
			invalidate_grid(m_sel_row,m_sel_col);
			m_sel_col=m_nNumberOfCols-1;
			if(GetKeyState(VK_CONTROL)<0)
				m_sel_row=m_nNumberOfRows-1;

			SetItemState(m_sel_row,LVIS_FOCUSED,LVIS_FOCUSED);

			*pResult=CDRF_SKIPDEFAULT;
			invalidate_grid(m_sel_row,m_sel_col);
			return;
	}
	
	*pResult = 0;
}

void CXListCtrl::invalidate_grid(int row, int col)
{
	CRect r;

	if(col==0)
		GetItemRect(row,&r,LVIR_LABEL);
	else
		GetSubItemRect(row,col,LVIR_BOUNDS,r);

	InvalidateRect(&r);
}