Win32 树视图控件的基本使用

首先参阅

https://blog.csdn.net/bcbobo21cn/article/details/106287676

认识Windows公共控件库的使用；

一创建树视图

首先用如下代码看一下，创建树视图控件是否成功返回句柄；

创建成功；但此时树视图是空的；只有一个框；

二添加第一个结点

代码；

TvInsertItem.hParent = NULL;
           TvInsertItem.hInsertAfter = TVI_LAST;
           TvInsertItem.item.mask = TVIF_TEXT;
           TvInsertItem.item.pszText = pStrText;
           //TVI_LAST：insert the item at the end of list
           hitema=SendMessage(hTree, TVM_INSERTITEM, 0, (LPARAM)(&TvInsertItem));;
添加结点的操作为：

定义 TVINSERTSTRUCT 结构体对象TvInsertItem，此结构体代表一个结点；

为TvInsertItem赋值，.hParent是此结点的父，根结点填为NULL；

向树视图发送消息，第一个参数是树视图句柄，第四个参数是TvInsertItem结构体地址并转为LPARAM类型；

创建成功返回的是此次创建的结点的句柄，为 HTREEITEM 类型；

效果如下；

工程；

三添加更多结点

创建子结点，.hParent成员填为父结点句柄；如果再创建根结点，.hParent填为NULL；

效果如下；

码：

#include <windows.h>
#include <commctrl.h>
#include "resource.h"LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);HINSTANCE hInst;
TCHAR szClassName[] = TEXT("win32TreeDemo");
HWND hTree;int WINAPI
WinMain (HINSTANCE hThisInstance,HINSTANCE hPrevInstance,LPSTR lpszArgument,int nFunsterStil)
{HWND hwnd;MSG messages;WNDCLASSEX wincl;hInst = hThisInstance;wincl.hInstance = hThisInstance;wincl.lpszClassName = szClassName;wincl.lpfnWndProc = WindowProcedure;wincl.style = CS_DBLCLKS;wincl.cbSize = sizeof (WNDCLASSEX);wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);wincl.hCursor = LoadCursor (NULL, IDC_ARROW);wincl.lpszMenuName = MAKEINTRESOURCE (IDC_WIN32TREEDEMO);wincl.cbClsExtra = 0;wincl.cbWndExtra = 0;wincl.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);if (!RegisterClassEx (&wincl))return 0;hwnd = CreateWindowEx (0,szClassName,TEXT("win32TreeDemo"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,300,500,HWND_DESKTOP,NULL,hThisInstance,NULL);ShowWindow (hwnd, nFunsterStil);while (GetMessage (&messages, NULL, 0, 0)){TranslateMessage(&messages);DispatchMessage(&messages);}return messages.wParam;
}LRESULT CALLBACK
WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{PAINTSTRUCT ps;HDC hdc;RECT rt;int ret;char szBuffer[100];char* pStrText="根结点AAAA";char* pStrText2="子结点AABB";char* pStrText3="子结点AACC";char* pStrText4="根结点BBBB";TVINSERTSTRUCT TvInsertItem, TvInsertItem2, TvInsertItem3, TvInsertItem4;HTREEITEM hitema, hitemb, hitemab, hitemac;switch (message){case WM_COMMAND:switch (LOWORD(wParam)){case IDM_ABOUT:MessageBox (hwnd, TEXT ("win32TreeDemo v1.0\nCopyright (C) 2020\n by bo"),TEXT ("win32TreeDemo"), MB_OK | MB_ICONINFORMATION);break;case IDM_EXIT:DestroyWindow(hwnd);break;default:return DefWindowProc(hwnd, message, wParam, lParam);              }break;case WM_CREATE:hTree = CreateWindow("SysTreeView32", NULL, WS_CHILD | WS_BORDER |WS_VISIBLE | TVS_HASLINES | TVS_HASBUTTONS | TVS_LINESATROOT,10, 20, 200, 400, hwnd, NULL, NULL, NULL);//wsprintf(szBuffer, "0x%X",hTree);//MessageBox(NULL,szBuffer,TEXT("树视图句柄"),0);               TvInsertItem.hParent = NULL;TvInsertItem.hInsertAfter = TVI_LAST;TvInsertItem.item.mask = TVIF_TEXT;TvInsertItem.item.pszText = pStrText;       //TVI_LAST：insert the item at the end of listhitema=SendMessage(hTree, TVM_INSERTITEM, 0, (LPARAM)(&TvInsertItem));;TvInsertItem2.hParent = hitema;TvInsertItem2.hInsertAfter = TVI_LAST;TvInsertItem2.item.mask = TVIF_TEXT;TvInsertItem2.item.pszText = pStrText2;        hitemab=SendMessage(hTree, TVM_INSERTITEM, 0, (LPARAM)(&TvInsertItem2));;TvInsertItem3.hParent = hitema;TvInsertItem3.hInsertAfter = TVI_LAST;TvInsertItem3.item.mask = TVIF_TEXT;TvInsertItem3.item.pszText = pStrText3;      hitemac=SendMessage(hTree, TVM_INSERTITEM, 0, (LPARAM)(&TvInsertItem3));;TvInsertItem4.hParent = NULL;TvInsertItem4.hInsertAfter = TVI_LAST;TvInsertItem4.item.mask = TVIF_TEXT;TvInsertItem4.item.pszText = pStrText4;        hitemb=SendMessage(hTree, TVM_INSERTITEM, 0, (LPARAM)(&TvInsertItem4));;break;case WM_PAINT:hdc = BeginPaint(hwnd, &ps);                  GetClientRect(hwnd, &rt);           EndPaint(hwnd, &ps);break;case WM_DESTROY:PostQuitMessage (0);break;default:return DefWindowProc (hwnd, message, wParam, lParam);}return 0;
}

资源文件，头文件；

#include "resource.h"
#include <windows.h>/
//
// Menu
//IDC_WIN32TREEDEMO MENU
BEGINPOPUP "&File"BEGINMENUITEM "E&xit",                    IDM_EXITENDPOPUP "&Help"BEGINMENUITEM "&About ...",             IDM_ABOUTEND
END

#define  IDM_EXIT        10001
#define     IDM_ABOUT       10002#define    IDC_WIN32TREEDEMO       10101
#define     IDD_ABOUTBOX    10102