Vs2019 list control control self drawing routine inherits CListCtrl class onnmcustomdraw redrawing

Solemnly declare ：

        This routine is encapsulated by online routines , The online course introduction is wrong , The error mainly refers to that the encapsulated application should set the self drawing type of the control to True. The practical application is that there is no need to set the self drawing type of the control , If set to True Control must call DrawItem Self drawing , and

This article uses OnNMCustomdraw Self drawing , Therefore, the program will report an error , Therefore, the self drawing property of the control does not need any setting . Other versions of VS I don't know whether it needs to be set , This routine uses VS2019 So I found List Control The self drawing property of the control does not need to be set  .

  Wrapper class H The header file ListCtrlEx.h

#pragma once

class CListCtrlEx : public CListCtrl
{
	DECLARE_DYNAMIC(CListCtrlEx)
public:
	int			m_hoverIndex;			//  Index of current hot items ( Hot spots are when the mouse stops on a line )
	bool		m_mouseTrack;			//  Whether to track mouse movement events 
	bool		m_if_hotLine;			//  Whether to change the color of the hot line 
	COLORREF	m_oddItemBkColor;		//  Odd row background color 
	COLORREF	m_oddItemTextColor;		//  Odd line text color 
	COLORREF	m_evenItemBkColor;		//  Even row background color 
	COLORREF	m_evenItemTextColor;	//  Even lines of text color 
	COLORREF	m_hoverItemBkColor;		//  Hot line background color 
	COLORREF	m_hoverItemTextColor;	//  Hot line text color 
	COLORREF	m_selectItemBkColor;	//  Select the line background color 
	COLORREF	m_selectItemTextColor;	//  Select the line text color 

public:
	void SetOddItemBkColor(COLORREF color);
	void SetOddItemTextColor(COLORREF color);
	void SetEvenItemBkColor(COLORREF color);
	void SetEvenItemTextColor(COLORREF color);
	void SetHoverItemBkColor(COLORREF color);
	void SetHoverItemTextColor(COLORREF color);
	void SetSelectItemBkColor(COLORREF color);
	void SetSelectItemTextColor(COLORREF color);

public:
	CListCtrlEx();
	virtual ~CListCtrlEx();

protected:
	DECLARE_MESSAGE_MAP()

public:
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	afx_msg void OnMouseLeave();
	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
	afx_msg void OnPaint();
	afx_msg void OnNMCustomdraw(NMHDR *pNMHDR, LRESULT *pResult);
	afx_msg void OnLvnColumnclick(NMHDR *pNMHDR, LRESULT *pResult);
	struct GetItemColumnText
	{
		CString nColumn_UserName;
		CString nColumn_UserPwd;
		CString nColumn_UserType;		 
	}m_UserDataInformation;
	//virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
};

   Wrapper class CPP file ListCtrlEx.CPP

#include"pch.h"
#include "ListCtrlEx.h"
#pragma warning(disable:26454)

IMPLEMENT_DYNAMIC(CListCtrlEx, CListCtrl)

/**
 *  Constructors 
 */
CListCtrlEx::CListCtrlEx()
{
	m_hoverIndex			=	-1;						//  Index of current hot items 
	m_mouseTrack			=	true;					//  Track mouse movement events 
	m_if_hotLine			=	true;					//  By default, the hotspot line is not enabled to change color 
	m_oddItemBkColor		=   RGB(240, 252, 255);		//  Odd row background color （ Default white ）
	m_evenItemBkColor		=   RGB(255, 251, 240);		//  Even row background color （ Default white ）
	m_hoverItemBkColor		=   RGB(238, 222, 176);		//  Hot line background color （ Default white ）
	m_selectItemBkColor		=   RGB(192, 235, 215);		//  Select the line background color （ Default blue ）
	m_oddItemTextColor		=   RGB(16, 18, 23);	    //  Odd line text color （ Default black ）
	m_evenItemTextColor		=   RGB(16, 18, 23);		//  Even lines of text color （ Default black ）
	m_hoverItemTextColor	=   RGB(29,209,165);		//  Hot line text color （ Default black ）
	m_selectItemTextColor	=   RGB(190,0,47);		    //  Select the line text color （ Default black ）
}


/**
 *  Destructor 
 */
CListCtrlEx::~CListCtrlEx()
{
}


BEGIN_MESSAGE_MAP(CListCtrlEx, CListCtrl)
	ON_NOTIFY_REFLECT(NM_CUSTOMDRAW, &CListCtrlEx::OnNMCustomdraw)
	ON_WM_MOUSEMOVE()
	ON_WM_MOUSELEAVE()
	ON_WM_ERASEBKGND()
	ON_WM_PAINT()
	ON_NOTIFY_REFLECT(LVN_COLUMNCLICK, &CListCtrlEx::OnLvnColumnclick)
END_MESSAGE_MAP()


/**
 *  Sort callback function 
 */
static int CALLBACK SortFunction(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
	CString &lp1 = *((CString *)lParam1);
	CString &lp2 = *((CString *)lParam2);
	int &sort = *(int *)lParamSort;

	if (sort == 0)
		return lp1.CompareNoCase(lp2);
	else
		return lp2.CompareNoCase(lp1);
}


/**
 *  When the mouse moves over the control area 
 */
void CListCtrlEx::OnMouseMove(UINT nFlags, CPoint point)
{
	if(m_if_hotLine == true) {
		//  Get which line the mouse is currently on 
		int	newIndex;									//  One line of the current mouse 
		int	oldIndex;									//  Record the original line ( That is, the line before leaving )

		newIndex = HitTest(point);
		if(newIndex != m_hoverIndex) {
			CRect rc;
			oldIndex = m_hoverIndex;
			m_hoverIndex = newIndex;

			//  Refresh the area after leaving 
			if(oldIndex != -1) {
				GetItemRect(oldIndex, &rc, LVIR_BOUNDS);
				InvalidateRect(&rc);
			}
			//  Refresh to a new area 
			if(m_hoverIndex != -1) {
				GetItemRect(m_hoverIndex, &rc, LVIR_BOUNDS);
				InvalidateRect(&rc);
			}
		}

		//  The mouse should track WM_MOUSELEAVE event 
		if (m_mouseTrack) {
			TRACKMOUSEEVENT csTME;
			csTME.cbSize = sizeof(csTME);
			csTME.dwFlags = TME_LEAVE;					//  Specify the events to track 
			csTME.hwndTrack = m_hWnd;					//  Specify the window to track  
			::_TrackMouseEvent(&csTME);					//  Turn on Windows Of WM_MOUSELEAVE Event support 
			m_mouseTrack = false;						//  If it has been tracked , Then stop tracking  
		}
	}

	CListCtrl::OnMouseMove(nFlags, point);
}


/**
 *  When the mouse leaves the control area 
 */
void CListCtrlEx::OnMouseLeave()
{
	if(m_if_hotLine == true) {
		//  Start tracking 
		m_mouseTrack = true;
	
		if(m_hoverIndex != -1) {
			CRect rc;
			GetItemRect(m_hoverIndex,&rc,LVIR_BOUNDS);
			InvalidateRect(&rc);
			m_hoverIndex = -1;
			m_mouseTrack = true;
		}
	}

	CListCtrl::OnMouseLeave();
}


/**
 *  Erase background 
 */
BOOL CListCtrlEx::OnEraseBkgnd(CDC* pDC)
{
	return FALSE;
}


/**
 *  painting 
 */
void CListCtrlEx::OnPaint()
{
	CPaintDC dc(this);
	CRect rect;
    CRect headerRect;
    CDC memDC;
    CBitmap bitmap;

	GetClientRect(&rect);
	GetDlgItem(0)->GetWindowRect(&headerRect);
	memDC.CreateCompatibleDC(&dc);
	bitmap.CreateCompatibleBitmap(&dc, rect.Width(), rect.Height());
	memDC.SelectObject(&bitmap);
	memDC.FillSolidRect(&rect, RGB(240, 255, 255));
	//  Call the default OnPaint(), Draw graphics in memory DC On the table 
	DefWindowProc(WM_PAINT, (WPARAM)memDC.m_hDC, (LPARAM)0);
	//  Output to display device 
	dc.BitBlt(0, headerRect.Height(), rect.Width(), rect.Height(), &memDC, 0, headerRect.Height(), SRCCOPY);
	memDC.DeleteDC();
	bitmap.DeleteObject();
}

/**
 *  owner-draw 
 */
void CListCtrlEx::OnNMCustomdraw(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMLVCUSTOMDRAW pNMCD = reinterpret_cast<LPNMLVCUSTOMDRAW>(pNMHDR);
	int	itemIndex = pNMCD->nmcd.dwItemSpec;

	if (pNMCD->nmcd.dwDrawStage == CDDS_PREPAINT) {
		*pResult = CDRF_NOTIFYITEMDRAW;
	}
	else if (pNMCD->nmcd.dwDrawStage == CDDS_ITEMPREPAINT) 
	{
		//  Select row ( Row selected by mouse )
		if(GetItemState(itemIndex,LVIS_SELECTED) == LVIS_SELECTED)
		{
			pNMCD->nmcd.uItemState = ~CDIS_SELECTED;
			pNMCD->clrTextBk = m_selectItemBkColor;
			pNMCD->clrText = pNMCD->clrFace = m_selectItemTextColor;
		}
		// CheckBox Tick line 
		else if(GetCheck(itemIndex) && (GetExtendedStyle() & LVS_EX_CHECKBOXES)) {
			pNMCD->clrTextBk = m_selectItemBkColor;
			pNMCD->clrText = m_selectItemTextColor;
		}
		//  Hot line ( Mouse over )
		else if(itemIndex==m_hoverIndex) {
			pNMCD->clrTextBk = m_hoverItemBkColor;
			pNMCD->clrText = m_hoverItemTextColor;
		}
		//  Even number line ( such as  0、2、4、6)
		else if(itemIndex % 2==0){
			pNMCD->clrTextBk=m_evenItemBkColor;
			pNMCD->clrText=m_evenItemTextColor;
		}
		//  Odd line ( such as  1、3、5、7)
		else{
			pNMCD->clrTextBk = m_oddItemBkColor;
			pNMCD->clrText = m_oddItemTextColor;
		}
		*pResult = CDRF_NEWFONT;
	}
}


/**
 *  Click on the header ( Here we mainly sort the data in the list )
 */
void CListCtrlEx::OnLvnColumnclick(NMHDR *pNMHDR, LRESULT *pResult)
{
	int count = 0;
	static int sort = 0;
	static int subItem = 0;
	CArray<CString,CString> itemData;
	LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);

	//  Get the total number of rows 
	count = GetItemCount();
	itemData.SetSize(count);

	//  Set the data to be sorted 
	for (int i = 0; i < count; i++) {
		itemData[i] = GetItemText(i, pNMLV->iSubItem);
		SetItemData(i, (DWORD_PTR)&itemData[i]);		//  Set the data to be sorted 
	}

	//  If you click in the header of another column 
	if (subItem != pNMLV->iSubItem) {
		sort = 0;
		subItem = pNMLV->iSubItem;
	}
	//  If you click in the header of the same column ( In ascending order , Then change to descending order ; In descending order , Then change to ascending order )
	else {
		sort = (sort == 0 ? 1 : 0);
	}

	SortItems(SortFunction,(DWORD_PTR)&sort);			//  Call callback function , Sort 
	*pResult = 0;
}


/**
 *  Set the background color of odd rows 
 *
 * @param oddItemBkColor  Odd row background color 
 */
void CListCtrlEx::SetOddItemBkColor(COLORREF oddItemBkColor)
{
	m_oddItemBkColor = oddItemBkColor;
}


/**
 *  Set the color of odd lines of text 
 *
 * @param oddItemBkColor  Odd line text color 
 */
void CListCtrlEx::SetOddItemTextColor(COLORREF oddItemTextColor)
{
	m_oddItemTextColor = oddItemTextColor;
}


/**
 *  Set even line background color 
 *
 * @param evenItemBkColor  Even row background color 
 */
void CListCtrlEx::SetEvenItemBkColor(COLORREF evenItemBkColor)
{
	m_evenItemBkColor = evenItemBkColor;
}


/**
 *  Set the color of even lines of text 
 *
 * @param evenItemTextColor  Even text color 
 */
void CListCtrlEx::SetEvenItemTextColor(COLORREF evenItemTextColor)
{
	m_evenItemTextColor = evenItemTextColor;
}


/**
 *  Set the background color of the hot line 
 *
 * @param hoverItemBkColor  Hot line background color 
 */
void CListCtrlEx::SetHoverItemBkColor(COLORREF hoverItemBkColor)
{
	m_hoverItemBkColor = hoverItemBkColor;
	m_if_hotLine = true;
}


/**
 *  Set the hot line text color 
 *
 * @param hoverItemTextColor  Hot line text color 
 */
void CListCtrlEx::SetHoverItemTextColor(COLORREF hoverItemTextColor)
{
	m_hoverItemTextColor = hoverItemTextColor;
	m_if_hotLine = true;
}


/**
 *  Set the background color of the selected row 
 *
 * @param selectItemBkColor  Select the line background color 
 */
void CListCtrlEx::SetSelectItemBkColor(COLORREF selectItemBkColor)
{
	m_selectItemBkColor = selectItemBkColor;
}


/**
 *  Set the text color of the selected line 
 *
 * @param selectItemTextColor  Select the line text color 
 */
void CListCtrlEx::SetSelectItemTextColor(COLORREF selectItemTextColor)
{
	m_selectItemTextColor = selectItemTextColor;
}

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