领域—Win32桌面程序

Win32-编程添加控件及监听

Win32编程系列文章：https://www.jianshu.com/nb/30332818

添加控件

在Hello World基础上，添加：

  • wWinMain内部创建变量，使用的是如下的方法： 
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    //创建静态文本控件
    HWND hStatic = CreateWindow(
    	TEXT("static"),  //静态文本框的类名
    	TEXT("hahaha"),  //控件的文本
    	WS_CHILD /*子窗口*/ | WS_VISIBLE /*创建时显示*/ | WS_BORDER /*带边框*/,
    	120 /*X坐标*/, 20/*Y坐标*/, 150/*宽度*/, 80/*高度*/, hwnd/*父窗口句柄*/,
    	(HMENU)1,  //为控件指定一个唯一标识符
    	hInstance,  //当前实例句柄
    	NULL
    );
  • 类似可以创建按钮、输入框等，如下： 
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    // 下面一行代码创建输入框
    CreateWindow(L"EDIT", 0, WS_BORDER | WS_CHILD | WS_VISIBLE, 56, 10, 50, 18, hwnd, 0, hInstance, 0);

    // 下面一行代码创建按钮
    my_button = CreateWindow(L"BUTTON", L"一个按钮", WS_CHILD | WS_VISIBLE, 70, 70, 80, 25, hwnd, (HMENU)8, hInstance, 0);
  • 创建下拉框的时候会比较麻烦，需要绑定数据，如下所示： 
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    TCHAR Planets[9][10] =
    {
    	TEXT("Mercury"), TEXT("Venus"), TEXT("Terra"), TEXT("Mars"),
    	TEXT("Jupiter"), TEXT("Saturn"), TEXT("Uranus"), TEXT("Neptune"),
    	TEXT("Pluto??")
    };

    int xpos = 100;            // Horizontal position of the window.
    int ypos = 100;            // Vertical position of the window.
    int nwidth = 200;          // Width of the window
    int nheight = 200;         // Height of the window
    HWND hwndParent = hwnd; // Handle to the parent window

    HWND hWndComboBox = CreateWindow(L"COMBOBOX", TEXT(""),
    	CBS_DROPDOWN | CBS_HASSTRINGS | WS_CHILD | WS_OVERLAPPED | WS_VISIBLE,
    	xpos, ypos, nwidth, nheight, hwndParent, NULL, hInstance,
    	NULL);

    TCHAR A[16];
    int  k = 0;

    memset(&A, 0, sizeof(A));
    for (k = 0; k <= 8; k += 1)
    {
    	wcscpy_s(A, sizeof(A) / sizeof(TCHAR), (TCHAR*)Planets[k]);

    	// Add string to combobox.
    	SendMessage(hWndComboBox, (UINT)CB_ADDSTRING, (WPARAM)0, (LPARAM)A);
    }

    // Send the CB_SETCURSEL message to display an initial item 
    //  in the selection field  
    SendMessage(hWndComboBox, CB_SETCURSEL, (WPARAM)2, (LPARAM)0);

绑定事件

  • 在WindowProc里面添加对应的switch-case，如下： 
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    wchar_t a[6] = TEXT("Dian0");
    int wmId = LOWORD(wParam);
    int wmEvent = HIWORD(wParam);
    switch (uMsg)
    {
    case WM_CLOSE:
    	DestroyWindow(hwnd);
    	break;
    case WM_DESTROY:
    	PostQuitMessage(0);
    	break;
    case WM_COMMAND:
    	if (wmEvent == BN_CLICKED) {
    		a[4] = L'0' + (a[4] - L'0' + 1) % 10;
    		SetWindowText(my_button, a);
    		break;
    	}
    	else if (wmEvent == CBN_SELCHANGE)
    		// If the user makes a selection from the list:
    		//   Send CB_GETCURSEL message to get the index of the selected list item.
    		//   Send CB_GETLBTEXT message to get the item.
    		//   Display the item in a messagebox.
    	{
    		int ItemIndex = SendMessage((HWND)lParam, (UINT)CB_GETCURSEL,
    			(WPARAM)0, (LPARAM)0);
    		TCHAR  ListItem[256];
    		(TCHAR)SendMessage((HWND)lParam, (UINT)CB_GETLBTEXT,
    			(WPARAM)ItemIndex, (LPARAM)ListItem);
    		MessageBox(hwnd, (LPCWSTR)ListItem, TEXT("Item Selected"), MB_OK);
    	}
    	// Here don't write break on purpose!
    default:
    	return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    // 还是得要去处理default的事件