listctrlex.cpp

UHF RFID Reader Program

// CJListCtrl.cpp : implementation file
// Copyright ?1998-1999 CodeJock.com, All Rights Reserved.
// See ReadMe.txt for TERMS OF USE.
//
// Based on the CListView articles from http://www.codeguru.com/listview
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "ListCtrlEx.h"
#include "HeaderCtrlEx.h"
#include "Resource.h"

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


#ifndef HDF_SORTUP
	#define HDF_SORTUP              0x0400
	#define HDF_SORTDOWN            0x0200
#endif

namespace techwin
{
/////////////////////////////////////////////////////////////////////////////
// CListCtrlEx

CListCtrlEx::CListCtrlEx()
{
	m_nMinSize		= 0;
	m_nMinColWidth	= 20;
	m_nMaxColWidth	= 500;
	m_nSortedCol	= -1;
	m_bAscending	= true;
	m_bAutoSave		= false;	
	m_bNoColSizing	= false;
	m_pHeaderCtrl	= NULL;
	m_clrText		= CLR_DEFAULT;
	m_clrTextBk 	= CLR_DEFAULT;
}

CListCtrlEx::~CListCtrlEx()
{
	delete( m_pHeaderCtrl );
}

IMPLEMENT_DYNAMIC(CListCtrlEx, CListCtrl)

BEGIN_MESSAGE_MAP(CListCtrlEx, CListCtrl)
	//{{AFX_MSG_MAP(CListCtrlEx)
	ON_NOTIFY_REFLECT_EX(NM_CUSTOMDRAW, OnCustomDraw)
	ON_WM_DESTROY()
//	ON_WM_ERASEBKGND()
//	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CListCtrlEx message handlers

// Taken from: Copying/Moving Rows in CListCtrl by James Spibey [[e-mail]]. 
// http://www.codeguru.com/listview/moving_rows.html
bool CListCtrlEx::MoveRow(int nFrom, int nTo)
{
	//Can't move to the same place, or from or to a negative index
	if(nFrom == nTo || nFrom < 0 || nTo < 0)
		return false;
	
	//First Copy the row to the new location
	if(CopyRow(nFrom, nTo))
	{
		//If we have just inserted a row before
		//this one in the list, we need to increment
		//our index.
		if(nFrom > nTo)
			DeleteItem(nFrom + 1);
		else
			DeleteItem(nFrom);
		
		return true;
	}
	else
		return false;
}

// Taken from: Copying/Moving Rows in CListCtrl by James Spibey [[e-mail]]. 
// http://www.codeguru.com/listview/moving_rows.html
bool CListCtrlEx::CopyRow(int nFrom, int nTo)
{
	//Can't move to the same place, or from or to a negative index
	if(nFrom == nTo || nFrom < 0 || nTo < 0)
		return false;

	//Copy the row to the new index
	InsertItem(nTo, GetItemText(nFrom, 0));

	//If row has been inserted before original
	//increment the original
	if(nFrom > nTo)
		nFrom++;

	//Loop through subitems
	for(int i = 1; i < GetColumnCount(); i++)
	{
		SetItemText(nTo, i, GetItemText(nFrom, i));
	}

	return true;
}

// Taken from: Getting the number of columns in report view by Zafir Anjum.
// http://www.codeguru.com/listview/num_cols.shtml
int CListCtrlEx::GetColumnCount() const
{
	CHeaderCtrl* pHeader = (CHeaderCtrl*)GetDlgItem(0);
	return pHeader->GetItemCount();
}


// Taken from: Simpler way to do this (using new version of Comctl32.dll) by Vidas [[e-mail]].
// http://www.codeguru.com/mfc/comments/6432.shtml
BOOL CListCtrlEx::OnCustomDraw(NMHDR* pNMHDR, LRESULT* pResult) 
{
	LPNMLVCUSTOMDRAW lplvcd = (LPNMLVCUSTOMDRAW)pNMHDR;
	
    switch(lplvcd->nmcd.dwDrawStage)
	{
	case CDDS_PREPAINT:
		// Request prepaint notifications for each item.
		*pResult = CDRF_NOTIFYITEMDRAW;
		break;
		
    case CDDS_ITEMPREPAINT: // Requested notification
		if(lplvcd->nmcd.dwItemSpec >= 0)		// Was dwItemSpec % 2 before!
		{										// AJM 11.9.2000 [[e-mail]]
			lplvcd->clrText   = m_clrText;

			// Only change the background colour if the window is enabled
			// Otherwise, use the system default
			// AJM 11.9.2000 [[e-mail]]
			if (IsWindowEnabled() )
			{
				lplvcd->clrTextBk = m_clrTextBk;
			}
		}
		*pResult = CDRF_DODEFAULT;
		break;
	}
	return FALSE;								// Allow parent a crack at it (AJM 25.2.2002)
}


BOOL CListCtrlEx::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult) 
{
	HD_NOTIFY *pHDNotify = (HD_NOTIFY*)lParam;

	switch( pHDNotify->hdr.code )
	{
	// Sorting the list when user clicks on column header by Zafir Anjum.
	// http://www.codeguru.com/listview/sort_on_col_click.shtml
	case HDN_ITEMCLICKA:
	case HDN_ITEMCLICKW:
		{
			if( pHDNotify->iButton == 0 )
			{
				bool bAscending = m_bAscending;

				// set the sort order.
				if( pHDNotify->iItem == m_nSortedCol )
					bAscending = !bAscending;
				else
					bAscending = true;

				// virtual call to sort list.
				SortList(pHDNotify->iItem, bAscending );

				// set the sort image in the header control.
				// Moved to SortList() AJM 3.3.2001
				//if( m_pHeaderCtrl && m_pHeaderCtrl->GetSafeHwnd( ))
				//	m_pHeaderCtrl->SetSortImage( m_nSortedCol, m_bAscending );
			}
		}
		break;

	// How to force a minimum column width Cees Mechielsen.
	// http://www.codeguru.com/mfc/comments/866.shtml
	case HDN_ITEMCHANGINGA:
	case HDN_ITEMCHANGINGW:
	case HDN_ENDTRACK:
		{
			if( pHDNotify->pitem->mask & HDI_WIDTH &&
				pHDNotify->pitem->cxy < m_nMinSize &&
				pHDNotify->pitem->cxy >= 0 )
			{
				pHDNotify->pitem->cxy = m_nMinSize;	// Set the column width
			}
		}
		break;

	// Prevent CListCtrl column resizing by Zafir Anjum.
	// http://www.codeguru.com/listview/no_col_resize.shtml
	case HDN_DIVIDERDBLCLICKA:
	case HDN_DIVIDERDBLCLICKW:
	case HDN_BEGINTRACKW:
	case HDN_BEGINTRACKA:
		{
			if(m_bNoColSizing)
			{
				*pResult = TRUE;                // disable tracking
				return TRUE;                    // Processed message
			}
			break;
		}
	}

	return CListCtrl::OnNotify(wParam, lParam, pResult);
}

bool CListCtrlEx::SortList(int nCol, bool bAscending)
{
#ifdef _DEBUG
	//TRACE2("Column sort on column index %d, ascending=%d\n", nCol, bAscending);
#endif

	// Set the sort image in the header control.
	// AJM 3.3.2001
	SetSortImage( nCol, bAscending );

	return true;
}


// Taken from: Adding a column by Zafir Anjum.
// http://www.codeguru.com/listview/add_column.shtml

// AddColumn      - adds column after the right most column
// Returns        - the index of the new column if successful or -1 otherwise.
// lpszColHeading - the column's heading
// nWidth         - Width of the column, in pixels. If this parameter is -1, 
//                  the column width is the same as previous column
// nFormat        - the alignment of the column. Can be LVCFMT_LEFT,
//                  LVCFMT_RIGHT, or LVCFMT_CENTER.
int CListCtrlEx::AddColumn(LPCTSTR lpszColHeading, int nWidth/*=-1*/, int nFormat/*=LVCFMT_LEFT*/)
{
	CHeaderCtrl* pHeader = (CHeaderCtrl*)GetDlgItem(0);
	int nColumnCount = pHeader->GetItemCount();
	
	if( nWidth == -1 )
	{
		// The line below return zero for ICON views
		//nWidth = GetColumnWidth( nColumnCount - 1 );
		
		// Get the column width of the previous column from header control
		HD_ITEM hd_item;
		hd_item.mask = HDI_WIDTH;               //indicate that we want the width
		pHeader->GetItem( nColumnCount - 1, &hd_item );
		nWidth = hd_item.cxy;
	}
	return InsertColumn( nColumnCount, lpszColHeading, nFormat, nWidth, nColumnCount );
}

bool CListCtrlEx::BuildColumns(int nCols, int* nWidth, int* nColString)
{
	for( int i = 0; i < nCols; ++i ) {
		CString	strTemp; strTemp.LoadString( nColString[i] );
		if(AddColumn(strTemp, nWidth[i])==-1)
			return false;
	}

	return true;
}

bool CListCtrlEx::BuildColumns(int nCols, int* nWidth, CString* strColString)
{
	for( int i = 0; i < nCols; ++i ) {
		if(AddColumn(strColString[i], nWidth[i])==-1)
			return false;
	}

	return true;
}

// Taken from: Detecting column index of the item clicked by Zafir Anjum.
// http://www.codeguru.com/listview/col_index.shtml

// HitTestEx	- Determine the row index and column index for a point
// Returns		- the row index or -1 if point is not over a row
// point		- point to be tested.
// nCol			- to hold the column index
int CListCtrlEx::HitTestEx(CPoint& point, int* nCol) const
{
	int colnum = 0;
	int row = HitTest( point, NULL );
	
	if( nCol ) *nCol = 0;

	// Make sure that the ListView is in LVS_REPORT
	if( (GetWindowLong(m_hWnd, GWL_STYLE) & LVS_TYPEMASK) != LVS_REPORT )
		return row;

	// Get the top and bottom row visible
	row = GetTopIndex();
	int bottom = row + GetCountPerPage();
	if( bottom > GetItemCount() )
		bottom = GetItemCount();
	
	// Get the number of columns
	CHeaderCtrl* pHeader = (CHeaderCtrl*)GetDlgItem(0);
	int nColumnCount = pHeader->GetItemCount();

	// Loop through the visible rows
	for( ;row <= bottom;row++)
	{
		// Get bounding rect of item and check whether point falls in it.
		CRect rect;
		GetItemRect( row, &rect, LVIR_BOUNDS );
		if( rect.PtInRect(point) )
		{
			// Now find the column
			for( colnum = 0; colnum < nColumnCount; colnum++ )
			{
				int colwidth = GetColumnWidth(colnum);
				if( point.x >= rect.left 
					&& point.x <= (rect.left + colwidth ) )
				{
					if( nCol ) *nCol = colnum;
					return row;
				}
				rect.left += colwidth;
			}
		}
	}
	return -1;
}


void CListCtrlEx::SetThemeHelper(CThemeHelperEx* pTheme)
{
	m_pTheme = pTheme;
}


int CListCtrlEx::SetSortImage(int nCol, bool bAsc)
{
	int nPrevCol = m_nSortedCol;

	m_nSortedCol	= nCol;
	m_bAscending	= bAsc;

	if (NULL != m_pHeaderCtrl)
	{
		return m_pHeaderCtrl->SetSortImage( m_nSortedCol, m_bAscending );
	}

	// Set the sort image
	HWND hWnd = GetDlgItem(0)->GetSafeHwnd();
	ASSERT(NULL != hWnd);

	HDITEM hditem;

	// Remove the sort image from the previous column (if any)
	if (nPrevCol >= 0)
	{
		hditem.mask = HDI_FORMAT;
		VERIFY( Header_GetItem(hWnd, nPrevCol, &hditem) );

		hditem.fmt = hditem.fmt & ~HDF_SORTDOWN & ~HDF_SORTUP;

		Header_SetItem(hWnd, nPrevCol, &hditem);
	}

	// Now set the sort image on the new column
	hditem.mask = HDI_FORMAT;
	VERIFY( Header_GetItem(hWnd, m_nSortedCol, &hditem) );

	hditem.fmt = hditem.fmt & ~HDF_SORTDOWN & ~HDF_SORTUP;

	hditem.fmt |= m_bAscending ? HDF_SORTUP : HDF_SORTDOWN;

	Header_SetItem(hWnd, m_nSortedCol, &hditem);

	return nPrevCol;
}


bool CListCtrlEx::SubclassHeader(bool bBoldFont/*=false*/)
{
	// allocate memory for the flat header.
	m_pHeaderCtrl = new CHeaderCtrlEx;
	ASSERT( m_pHeaderCtrl );

	// get the window handle to the existing header
	// control.
	HWND hWnd = GetDlgItem(0)->GetSafeHwnd();
	ASSERT( hWnd );

	// subclass the flat header control.
	if( !m_pHeaderCtrl->SubclassWindow( hWnd ))
		return false;

	// finish header initialization.
	m_pHeaderCtrl->InitializeHeader( bBoldFont );
	
	return true;
}

void CListCtrlEx::AutoSaveColumns(LPCTSTR lpszSection, LPCTSTR lpszEntry, LPCTSTR lpszDefault)
{
	m_bAutoSave = true;

	// initialize registry strings.
	if( lpszSection == NULL ) m_strSection = _T("Settings");
	else m_strSection = lpszSection;

	if( lpszEntry == NULL ) m_strEntry = _T("Column Info");
	else m_strEntry = lpszEntry;

	if( lpszDefault == NULL ) m_strDefault = _T("");
	else m_strDefault = lpszDefault;

	LoadColumnWidths();
}

void CListCtrlEx::SaveColumnWidths()
{
	// get a pointer to the header control.
	CHeaderCtrl* pHeader = DYNAMIC_DOWNCAST(CHeaderCtrl, GetDlgItem(0));
	ASSERT_KINDOF( CHeaderCtrl, pHeader );

	CString strValue;
	for( int i = 0; i < pHeader->GetItemCount(); ++i )
	{
		CString strTemp;
		strTemp.Format(_T("%d,"), GetColumnWidth( i ));
		strValue += strTemp;
	}

	AfxGetApp()->WriteProfileString( m_strSection, m_strEntry, strValue );
}

void CListCtrlEx::LoadColumnWidths()
{
	// get a pointer to the header control.
	CHeaderCtrl* pHeader = DYNAMIC_DOWNCAST(CHeaderCtrl, GetDlgItem(0));
	ASSERT_KINDOF( CHeaderCtrl, pHeader );

	for( int i = 0; i < pHeader->GetItemCount(); ++i )
		SetColumnWidth(i);
}

void CListCtrlEx::SetColumnWidth(int nCol)
{
	int nWidth = GetStoredWidth( nCol );
	if( nWidth > m_nMinColWidth )
		CListCtrl::SetColumnWidth( nCol, nWidth );
	else
		AutoSizeColumn( nCol );
}

int CListCtrlEx::GetStoredWidth(int nCol)
{
	// get the value from the registry.
	CString strValue = AfxGetApp()->GetProfileString(
		m_strSection, m_strEntry, m_strDefault );

	// extract the sub string to get the column width.
	CString strSubString;
	AfxExtractSubString( strSubString, strValue, nCol, _T(','));

	// return the width from the registry.
	return _ttoi( strSubString );
}

void CListCtrlEx::OnDestroy() 
{
	if( m_bAutoSave ) SaveColumnWidths();
	CListCtrl::OnDestroy();
}

// Taken from: Autosize a column to fit its content by Roger Onslow.
// http://www.codeguru.com/listview/autosize_col.shtml
// If you don't supply a column number, it will resize all columns.
void CListCtrlEx::AutoSizeColumn(int nCol/*=-1*/)
{
	// Call this after your list control is filled
	SetRedraw( false );
	
	int nMinCol = nCol < 0 ? 0 : nCol;
	int nMaxCol = nCol < 0 ? GetColumnCount()-1 : nCol;
	
	for (nCol = nMaxCol; nCol >= nMinCol; nCol--)
	{
		CListCtrl::SetColumnWidth( nCol, LVSCW_AUTOSIZE );
		int wc1 = GetColumnWidth( nCol );
		
		CListCtrl::SetColumnWidth( nCol, LVSCW_AUTOSIZE_USEHEADER );
		int wc2 = GetColumnWidth( nCol );
	
		if ( (NULL != m_pHeaderCtrl) && (m_nSortedCol == nCol) )
		{
			wc2 += m_pHeaderCtrl->GetSortImageWidth();
		}

		int wc = max( m_nMinColWidth, max( wc1, wc2 ));

		if( wc > m_nMaxColWidth )
			wc = m_nMaxColWidth;
		
		// set the column width.
		CListCtrl::SetColumnWidth( nCol,wc );
	}
	
	SetRedraw();
}

BOOL CListCtrlEx::OnEraseBkgnd(CDC* pDC) 
{
	// KStowell - overridden for flicker-free drawing.
	UNUSED_ALWAYS(pDC);
	return TRUE;
}

void CListCtrlEx::OnPaint() 
{
	CPaintDC dc(this); // device context for painting

	// KStowell - Get the client rect.
	CRect rcClient, rcClip;
	dc.GetClipBox( &rcClip );
	GetClientRect( &rcClient );

	// Exclude the header control from being painted over.
	CWnd* pWnd = GetDlgItem(0);
	if(pWnd && pWnd->IsWindowVisible()) {
		CRect rcItem;
		pWnd->GetClientRect(&rcItem);
		dc.ExcludeClipRect(&rcItem);
	}

	// KStowell - Create a memory device-context. This is done to help reduce
	// screen flicker, since we will paint the entire control to the
	// off screen device context first.
	CDC memDC;
	CBitmap bitmap;
	memDC.CreateCompatibleDC(&dc);
	bitmap.CreateCompatibleBitmap(&dc, rcClient.Width(), rcClient.Height());
	CBitmap* pOldBitmap = memDC.SelectObject(&bitmap);

	// KStowell - Repaint the background.
	memDC.FillSolidRect( rcClient, ::GetSysColor(COLOR_WINDOW) );

	// let the control do its default drawing.
	CWnd::DefWindowProc( WM_PAINT, (WPARAM)memDC.m_hDC, 0 );

	// KStowell - Copy the memory device context back into the original DC via BitBlt().
	dc.BitBlt( rcClip.left, rcClip.top, rcClip.Width(), rcClip.Height(), &memDC, 
		rcClip.left, rcClip.top, SRCCOPY );

	// KStowell - Cleanup resources.
	memDC.SelectObject(pOldBitmap);
	memDC.DeleteDC();
	bitmap.DeleteObject();
}
};