[ATL/WTL]_[初级]_[如何获取ListView点击的单元格区域]

场景

1. 在做Win32/WTL开发时，CListViewCtrl控件是常用的表格控件。有时候自绘listview时，需要在单元格上绘制小图标，并且小图标能响应鼠标点击的操作。 那么如何实现判断是否点击了小图标呢？

说明

1. 要响应点击单元格上的小图标，那么需要判断点击的坐标POINT是否在小图标的区域CRect里。 坐标很容易得到，点击消息都会带坐标值。 小图标区域需要获取单元格所在区域，之后在通过相对位置获取小图标的区域。也就是只要获取点击的单元格区域就可以获取小图标区域。所以下边来看看如何获取点击的单元格所在区域。

2. listview要响应点击操作，可以使用传统的WM_LBUTTONUP消息，也可以使用NM_CLICK通知。

3. 如果是响应WM_LBUTTONUP消息，可以使用CListViewCtrl.SubItemHitTest()方法，它通过鼠标点击坐标来计算所在的行和列数值nItem和info.iSubItem^[3]。

   LVHITTESTINFO info = {0};
   info.pt = lpnmlv->ptAction;
   auto nItem = listview_.SubItemHitTest(&info);
   

4. 如果是响应NM_CLICK通知，它的lParam就可以强制转换为LPNMITEMACTIVATE指针类型^[2]。这个类型里可以使用它的成员iItem行,iSubItem列和ptAction点击坐标。 通过行和列值可以通过listview方法GetSubItemRect获取所在单元格的区域^[1]。 注意：这个方法只能获取第一列以上的区域，传递第0列获取的是整行的区域，所以要获取第0列的区域，还需要使用方法GetColumnWidth(0)来进行换算。

listview_.GetSubItemRect(p->iItem,p->iSubItem,LVIR_BOUNDS,&rect); // 第1列以上
if(!p->iSubItem){// 第0列计算auto width = listview_.GetColumnWidth(0);rect.right = rect.left+width; 
}

例子

View.h

// View.h : interface of the CView class
//
/#pragma once#include 
#include enum
{kMyStaticId = WM_USER+1,kMyListViewId,kMyCheckListViewId,kMySortListViewId,kMyButtonId
};class CView : public CWindowImpl<CView>
{
public:DECLARE_WND_CLASS(NULL)BOOL PreTranslateMessage(MSG* pMsg);BEGIN_MSG_MAP_EX(CView)MSG_WM_CREATE(OnCreate)MESSAGE_HANDLER(WM_PAINT, OnPaint)NOTIFY_HANDLER(kMyListViewId,NM_CLICK,OnNMClickListResult)NOTIFY_HANDLER(kMyListViewId,LVN_HOTTRACK,OnListItemHotTrack)REFLECT_NOTIFICATIONS()END_MSG_MAP()// Handler prototypes (uncomment arguments if needed):
//	LRESULT MessageHandler(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
//	LRESULT CommandHandler(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
//	LRESULT NotifyHandler(int /*idCtrl*/, LPNMHDR /*pnmh*/, BOOL& /*bHandled*/)int OnCreate(LPCREATESTRUCT lpCreateStruct);LRESULT OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);void UpdateLayout();LRESULT OnNMClickListResult(int idCtrl,LPNMHDR pnmh,BOOL &bHandled);void AddMockData(CListViewCtrl& listview);void OnCommandIDHandlerEX(UINT uNotifyCode, int nID, CWindow wndCtl);LRESULT OnListItemHotTrack(int idCtrl,LPNMHDR pnmh,BOOL &bHandled);private:std::wstring GetControlText(HWND hwnd,wchar_t* buf = NULL);CListViewCtrl listview_;CFont font_normal_;CFont font_bold_;CBrushHandle brush_white_;CBrushHandle brush_hollow_;CBrush brush_red_;CToolTipCtrl tooltip_;TCHAR strToolTipText_[MAX_PATH];public:
};

View.cpp

// View.cpp : implementation of the CView class
//
/#include "stdafx.h"
#include "resource.h"
#include 
#include 
#include #include "View.h"
#include 
#include 
#include using namespace std;BOOL CView::PreTranslateMessage(MSG* pMsg)
{return FALSE;
}LRESULT CView::OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
{CPaintDC dc(m_hWnd);CMemoryDC mdc(dc,dc.m_ps.rcPaint);CRect rect_client;GetClientRect(&rect_client);mdc.FillSolidRect(rect_client,RGB(255,255,255));//TODO: Add your drawing code herereturn 0;
}static HFONT GetFont(int pixel,bool bold,const wchar_t* font_name)
{LOGFONT lf; memset(&lf, 0, sizeof(LOGFONT)); // zero out structure lf.lfHeight = pixel; // request a 8-pixel-height fontif(bold){lf.lfWeight = FW_BOLD;  }lstrcpy(lf.lfFaceName, font_name); // request a face name "Arial"HFONT font = ::CreateFontIndirect(&lf);return font;
}std::wstring CView::GetControlText(HWND hwnd,wchar_t* buf)
{auto length = ::GetWindowTextLength(hwnd);bool bufNull = false;if(!buf){buf = new wchar_t[length+1]();bufNull = true;}::GetWindowText(hwnd,buf,length+1);std::wstring str(buf);if(bufNull)delete []buf;return str;
}static std::wstring GetProductBinDir()
{static wchar_t szbuf[MAX_PATH];  GetModuleFileName(NULL,szbuf,MAX_PATH);  PathRemoveFileSpec(szbuf);int length = lstrlen(szbuf);szbuf[length] = L'\\';szbuf[length+1] = 0;return std::wstring(szbuf);
}LRESULT CView::OnNMClickListResult(int idCtrl,LPNMHDR pnmh,BOOL &bHandled)
{auto p = (LPNMITEMACTIVATE) pnmh;int row = p->iItem;if(row == -1)return 0;CRect rect;// The one-based index of the subitem.// LVM_GETSUBITEMRECT message (Commctrl.h) - Win32 apps | Microsoft Learn https://learn.microsoft.com/en-us/windows/win32/controls/lvm-getsubitemrectlistview_.GetSubItemRect(p->iItem,p->iSubItem,LVIR_BOUNDS,&rect);if(!p->iSubItem){auto width = listview_.GetColumnWidth(0);rect.right = rect.left+width;}auto header = listview_.GetHeader();int nColumnCount = header.GetItemCount();wstringstream wss;static wchar_t buf[MAX_PATH];memset(buf,0,sizeof(buf));listview_.GetItemText(row,p->iSubItem,buf,MAX_PATH);wss << buf << L": Rect:[" << rect.left << L"," << rect.top << L"," <<rect.Width() << L"," <<rect.Height() << L"] Position:[" << p->ptAction.x << L"," << p->ptAction.y << L"]";wstring result = wss.str();MessageBox(result.c_str());return 0;
}void CView::AddMockData(CListViewCtrl& listview)
{listview.InsertColumn(0,L"No.",LVCFMT_LEFT,40);listview.InsertColumn(1,L"Name",LVCFMT_LEFT,200);listview.InsertColumn(2,L"Website",LVCFMT_LEFT,200);listview.InsertColumn(3,L"Level",LVCFMT_LEFT,200);wchar_t buf[MAX_PATH] = {0};LVCOLUMN co;memset(&co,0,sizeof(co));co.mask = LVCF_TEXT;co.pszText = buf;co.cchTextMax = MAX_PATH;listview.GetColumn(1,&co);std::wstring c0Text(buf);listview.GetColumn(2,&co);std::wstring c1Text(buf);listview.GetColumn(3,&co);std::wstring c2Text(buf);for(int i = 0; i<10;++i){wsprintf(buf,L"%d",i+1);listview.AddItem(i,0,buf);wsprintf(buf,(c0Text+L"-%d").c_str(),i);listview.AddItem(i,1,buf);wsprintf(buf,(c1Text+L"-%d").c_str(),i);listview.AddItem(i,2,buf);wsprintf(buf,(c2Text+L"-%d").c_str(),i);listview.AddItem(i,3,buf);}
}LRESULT CView::OnListItemHotTrack(int idCtrl,LPNMHDR pnmh,BOOL &bHandled)
{bHandled = TRUE;LPNMLISTVIEW lpnmlv = (LPNMLISTVIEW) pnmh;// 获取坐标所在的Item(行)和SubItem(列).LVHITTESTINFO info = {0};info.pt = lpnmlv->ptAction;auto nItem = listview_.SubItemHitTest(&info);if(nItem == -1)return 0;static int kShowTooltipColumn = 2;static wchar_t buf[MAX_PATH] = {0};if(info.iSubItem == kShowTooltipColumn){listview_.GetItemText(nItem,info.iSubItem,buf,MAX_PATH);tooltip_.UpdateTipText(buf,listview_);if(!listview_.GetToolTips()) listview_.SetToolTips(tooltip_);}else{if(listview_.GetToolTips())listview_.SetToolTips(NULL);}return 0;
}int CView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{font_normal_ = ::GetFont(16,false,L"Arial");font_bold_ = ::GetFont(16,true,L"Arial");// 1.创建CListViewCtrllistview_.Create(m_hWnd,0,NULL,WS_CHILD | WS_TABSTOP |WS_VISIBLE|LVS_ALIGNLEFT|LVS_REPORT|LVS_SHOWSELALWAYS|WS_BORDER,0,kMyListViewId);// 2.如果需要监听在listview鼠标移动消息，创建时传入LVS_EX_TRACKSELECT扩展样式。listview_.SetExtendedListViewStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES|LVS_EX_DOUBLEBUFFER|LVS_EX_TRACKSELECT);listview_.SetFont(font_normal_);auto header = listview_.GetHeader();header.SetFont(font_bold_);listview_.SetBkColor(RGB(255,255,255));AddMockData(listview_);tooltip_.Create(listview_,NULL,NULL,TTS_NOPREFIX);tooltip_.AddTool(listview_,L"");listview_.SetToolTips(tooltip_);listview_.SetHoverTime(10);brush_hollow_ = AtlGetStockBrush(HOLLOW_BRUSH);brush_white_ = AtlGetStockBrush(WHITE_BRUSH);brush_red_.CreateSolidBrush(RGB(255,0,0));UpdateLayout();return 0;
}void CView::OnCommandIDHandlerEX(UINT uNotifyCode, int nID, CWindow wndCtl)
{}void CView::UpdateLayout()
{CRect rect;GetClientRect(&rect);CClientDC dc(m_hWnd);dc.SelectFont(font_normal_);CSize size_control(700,300);CRect rect_control = CRect(CPoint(20,20),size_control);listview_.MoveWindow(rect_control);}

项目资源

https://download.csdn.net/download/infoworld/87881180

图示

参考

1. LVM_GETSUBITEMRECT message (Commctrl.h)

2. NM_CLICK (list view) notification code (Commctrl.h)

3. LVM_SUBITEMHITTEST message (Commctrl.h)

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