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；

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); 

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 list
			hitema=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 
BEGIN
    POPUP "&File"
    BEGIN
        MENUITEM "E&xit",                	IDM_EXIT
    END
    POPUP "&Help"
    BEGIN
        MENUITEM "&About ...",           	IDM_ABOUT
    END
END

#define 	IDM_EXIT		10001
#define 	IDM_ABOUT		10002

#define 	IDC_WIN32TREEDEMO		10101
#define 	IDD_ABOUTBOX	10102