- // 实验 2.cpp : 定义应用程序的入口点.
- //
- #include "framework.h"
- #include "实验 2.h"
- #define MAX_LOADSTRING 100
- // 全局变量:
- int nMode;
- HINSTANCE hInst; // 当前实例
- WCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
- WCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
- // 此代码模块中包含的函数的前向声明:
- ATOM MyRegisterClass(HINSTANCE hInstance);
- BOOL InitInstance(HINSTANCE, int);
- LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
- INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
- int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
- _In_opt_ HINSTANCE hPrevInstance,
- _In_ LPWSTR lpCmdLine,
- _In_ int nCmdShow)
- {
- UNREFERENCED_PARAMETER(hPrevInstance);
- UNREFERENCED_PARAMETER(lpCmdLine);
- // TODO: 在此处放置代码.
- // 初始化全局字符串
- LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
- LoadStringW(hInstance, IDC_MY2, szWindowClass, MAX_LOADSTRING);
- MyRegisterClass(hInstance);
- // 执行应用程序初始化:
- if (!InitInstance(hInstance, nCmdShow))
- {
- return FALSE;
- }
- HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_MY2));
- MSG msg;
- // 主消息循环:
- while (GetMessage(&msg, 0, 0, 0))
- {
- if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- }
- return (int)msg.wParam;
- }
- //
- // 函数: MyRegisterClass()
- //
- // 目标: 注册窗口类.
- //
- ATOM MyRegisterClass(HINSTANCE hInstance)
- {
- WNDCLASSEXW wcex;
- wcex.cbSize = sizeof(WNDCLASSEX);
- wcex.style = CS_HREDRAW | CS_VREDRAW;
- wcex.lpfnWndProc = WndProc;
- wcex.cbClsExtra = 0;
- wcex.cbWndExtra = 0;
- wcex.hInstance = hInstance;
- wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_MY2));
- wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
- wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
- wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_MY2);
- wcex.lpszClassName = szWindowClass;
- wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
- return RegisterClassExW(&wcex);
- }
- //
- // 函数: InitInstance(HINSTANCE, int)
- //
- // 目标: 保存实例句柄并创建主窗口
- //
- // 注释:
- //
- // 在此函数中, 我们在全局变量中保存实例句柄并
- // 创建和显示主程序窗口.
- //
- BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
- {
- hInst = hInstance; // 将实例句柄存储在全局变量中
- HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
- if (!hWnd)
- {
- return FALSE;
- }
- ShowWindow(hWnd, nCmdShow);
- UpdateWindow(hWnd);
- return TRUE;
- }
- //
- // 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
- //
- // 目标: 处理主窗口的消息.
- //
- // WM_COMMAND - 处理应用程序菜单
- // WM_PAINT - 绘制主窗口
- // WM_DESTROY - 发送退出消息并返回
- //
- //
- LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- /* 添加的代码 ***************/
- HDC hdc;
- HBRUSH hB1, hB2;
- /*************************/
- switch (message)
- {
- case WM_COMMAND:
- {
- int wmId = LOWORD(wParam);
- // 分析菜单选择:
- switch (wmId)
- {
- case IDM_ABOUT:
- DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
- break;
- case IDM_EXIT:
- DestroyWindow(hWnd);
- break;
- default:
- return DefWindowProc(hWnd, message, wParam, lParam);
- }
- }
- break;
- /****** 添加的代码 ******/
- case WM_LBUTTONDOWN: // 单击鼠标左键
- nMode = MM_ISOTROPIC; // 更改映像模式为 MM_ISOTROPIC
- InvalidateRect(hWnd, NULL, 1);// 刷新用户区
- break;
- case WM_RBUTTONDOWN: // 单击鼠标右键
- nMode = MM_ANISOTROPIC;// 更改映像模式为 MM_ANISOTROPIC
- InvalidateRect(hWnd, NULL, 1);
- break;
- /*********************/
- case WM_PAINT:
- PAINTSTRUCT ps;
- hdc = BeginPaint(hWnd, &ps);
- // TODO: 在此处添加使用 hdc 的任何绘图代码...
- SetMapMode(hdc, nMode); // 设置映射模式
- SetWindowExtEx(hdc, 150, 150, NULL);// 设置窗口区域
- SetViewportExtEx(hdc, 150, 100, NULL);// 设置视口区域
- SetViewportOrgEx(hdc, 150, 60, NULL);// 设置视口原点
- hB1 = (HBRUSH)GetStockObject(WHITE_BRUSH);
- hB2 = (HBRUSH)GetStockObject(BLACK_BRUSH);
- SelectObject(hdc, hB1);
- RoundRect(hdc, 0, 0, 150, 150, 30, 30);// 绘制圆角矩形并填充
- SelectObject(hdc, hB2);
- Ellipse(hdc, 0, 10, 150, 140);// 绘制椭圆并填充
- EndPaint(hWnd, &ps);// 释放设备环境句柄
- DeleteObject(hB1);
- DeleteObject(hB2);
- break;
- case WM_DESTROY:
- PostQuitMessage(0);
- break;
- default:
- return DefWindowProc(hWnd, message, wParam, lParam);
- }
- return 0;
- }
- // "关于" 框的消息处理程序.
- INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
- {
- UNREFERENCED_PARAMETER(lParam);
- switch (message)
- {
- case WM_INITDIALOG:
- return (INT_PTR)TRUE;
- case WM_COMMAND:
- if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
- {
- EndDialog(hDlg, LOWORD(wParam));
- return (INT_PTR)TRUE;
- }
- break;
- }
- return (INT_PTR)FALSE;
- }
效果:
来源: http://www.bubuko.com/infodetail-3461701.html