17.子窗口

Notes #滴水基础_Win32

子窗口控件

  • WINODWS提供了几个预定义的窗口类以方便我们的使用，我们一般就它们叫做子窗口控件，简称控件。
  • 空间会自己处理消息，并在自己状态发生时通知父窗口
  • 预定义的控件有
    • 按钮、复选框、编辑框、静态字符串标签和滚动条等
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#include "framework.h"
#include "Win32.h"


#define IDC_EDIT_1 0x100
#define IDC_BUTTON_1 0x101
#define IDC_BUTTON_2 0x102

HINSTANCE g_hInstance;
LRESULT CALLBACK WindowsProc(
	HWND hwnd,
	UINT uMsg,
	WPARAM wParam,
	LPARAM rParam
) {
	char szOutBuff[0x80];
	wsprintfA(szOutBuff, "消息类型: %lx\n", uMsg);
	OutputDebugStringA(szOutBuff);
	switch (uMsg) {
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		case WM_CREATE:
			CreateWindowA(
				"EDIT",
				"",
				WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_MULTILINE,
				0,
				0,
				500,
				300,
				hwnd,
				(HMENU)IDC_EDIT_1,
				g_hInstance,
				NULL
			);
			CreateWindowA(
				"BUTTON",
				"设置",
				WS_CHILD | WS_VISIBLE,
				520,
				180,
				60,
				30,
				hwnd,
				(HMENU)IDC_BUTTON_1,
				g_hInstance,
				NULL
			);
			CreateWindowA(
				"BUTTON",
				"获取",
				WS_CHILD | WS_VISIBLE,
				520,
				220,
				60,
				30,
				hwnd,
				(HMENU)IDC_BUTTON_2,
				g_hInstance,
				NULL
			);
			break;
		case WM_COMMAND:
			switch (LOWORD(wParam)) {
				case IDC_BUTTON_1:
					SetDlgItemText(hwnd, IDC_EDIT_1, TEXT("测试"));
					break;
				case IDC_BUTTON_2:
					GetDlgItemTextA(hwnd,IDC_EDIT_1,szOutBuff,100);
					MessageBoxA(hwnd, szOutBuff, szOutBuff, 0);

					break;
			}
			break;
	}


	return DefWindowProc(hwnd, uMsg,wParam,rParam);
}


int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    
	g_hInstance = hInstance;
	//DWORD  dwAddr = (DWORD)hInstance;
	char szOutBuff[80];
	
	//1.定义你的窗口是怎么样的
	WNDCLASS wndclass = { 0 };
	TCHAR szAppName[] = TEXT("MyApp");
	wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wndclass.lpszClassName = szAppName;
	wndclass.hInstance = hInstance;
	wndclass.lpfnWndProc = WindowsProc;
	RegisterClass(&wndclass);

	//2.创建并显示窗口
	HWND hwnd = CreateWindow(szAppName,TEXT("Hello"),WS_OVERLAPPEDWINDOW,10,10,600,300,NULL,NULL,hInstance,NULL);
	if (hwnd == NULL) {
		wsprintfA(szOutBuff, "Error: %d\n", GetLastError());
		OutputDebugStringA(szOutBuff);
		return 0;
	}

	ShowWindow(hwnd, SW_SHOW);

	//3.接收并处理消息
	MSG msg;
	BOOL bRet;
	while ((bRet = GetMessage(&msg, NULL, 0, 0)) != 0) {
		if (bRet == -1)
		{
			wsprintfA(szOutBuff, "Error: %d\n", GetLastError());
			OutputDebugStringA(szOutBuff);
		}
		else {
			//转换消息
			TranslateMessage(&msg);
			//分发消息
			DispatchMessageW(&msg);
		}
	}

    return 0;
}

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由 GuQing 撰写，采用 CC BY-NC 4.0 许可协议。