Windows程序设计GDI计算器

// calculator03.cpp : 定义应用程序的入口点。 // #include "stdafx.h" #include "calculator03.h" #include "Counter.h" using namespace std ; #define MAX_LOADSTRING 100 // 全局变量: HINSTANCE hInst; // 当前实例 TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本 TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名 BOOL OnButton(int xMouse, int yMouse, int xLeft, int yTop, int xRight, int yBottom);//判断鼠标在Button上 // 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 _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) { UNREFERENCED_PARAMETER(hPrevInstance); UNREFERENCED_PARAMETER(lpCmdLine); // TODO: 在此放置代码。 MSG msg; HACCEL hAccelTable; // 初始化全局字符串 LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING); LoadString(hInstance, IDC_CALCULATOR03, szWindowClass, MAX_LOADSTRING); MyRegisterClass(hInstance); // 执行应用程序初始化: if (!InitInstance (hInstance, nCmdShow)) { return FALSE; } hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_CALCULATOR03)); // 主消息循环: while (GetMessage(&msg, NULL, 0, 0)) { if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } } return (int) msg.wParam; } // // 函数: MyRegisterClass() // // 目的: 注册窗口类。 // // 注释: // // 仅当希望 // 此代码与添加到 Windows 95 中的“RegisterClassEx” // 函数之前的 Win32 系统兼容时，才需要此函数及其用法。调用此函数十分重要， // 这样应用程序就可以获得关联的 // “格式正确的”小图标。 // ATOM MyRegisterClass(HINSTANCE hInstance) { WNDCLASSEX wndclass; wndclass.cbSize = sizeof(WNDCLASSEX); wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_CALCULATOR03)); wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH);//(HBRUSH)(COLOR_WINDOW+1); wndclass.lpszMenuName = MAKEINTRESOURCE(IDC_CALCULATOR03); wndclass.lpszClassName = szWindowClass; wndclass.hIconSm = LoadIcon(wndclass.hInstance, MAKEINTRESOURCE(IDI_SMALL)); return RegisterClassEx(&wndclass); } // // 函数: InitInstance(HINSTANCE, int) // // 目的: 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) { HWND hWnd; hInst = hInstance; // 将实例句柄存储在全局变量中 hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW , 500, 300, 250, 220, NULL, NULL, hInstance, NULL); if (!hWnd) { return FALSE; } ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); return TRUE; } // // 函数: WndProc(HWND, UINT, WPARAM, LPARAM) // // 目的: 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) { int wmId, wmEvent, xMouse, yMouse; PAINTSTRUCT ps; HDC hdc; static std::wstring psText = L"0"; //static int yText = 230 - 8*wcslen(psText); static wstring inStr ; static CCounter counter ; //RECT rect; switch (message) { case WM_KEYDOWN: switch ( wParam ) { case VK_DELETE : counter = CCounter() ; inStr.clear () ; //SetWindowText( hEditResult, L"0") ; psText = L"0"; InvalidateRect (hWnd, NULL, TRUE) ; break; } return 0 ; case WM_CHAR: switch( LOWORD( wParam ) ) { case '1' : case '2' : case '3' : case '4' : case '5' : case '6' : case '7' : case '8' : case '9' : case '0' : if( inStr .size () == 1 && inStr[ 0 ] == '0' ) inStr[ 0 ] = LOWORD( wParam ) ; else inStr += LOWORD( wParam ) ; //wstrcpy( psText, inStr.c_str()); case '.' : psText = inStr; if( LOWORD( wParam ) == '.' ) { if( inStr.empty () ) { //inStr = SetWindowText( hEditResult, L"0") ; psText = L"0"; InvalidateRect (hWnd, NULL, TRUE) ; } else if( inStr.find_first_of( '.' ) == wstring::npos ) inStr += '.'; psText = inStr; } // 如果这前的操作符是以下值,这时又输入了数字,当清空之前记录的值 ; if( counter.GetOper () == '~' || counter.GetOper () == 'S' || counter.GetOper () == '=' || counter.GetSum() == CCounter::ErrDiviend ) counter = CCounter() ; if( !inStr.empty () ) //strcpy(showEdit,inStr.c_str()); //SetWindowText( hEditResult, inStr.c_str() ) ; { InvalidateRect (hWnd, NULL, TRUE) ; /*hdc = GetDC(hWnd); TextOut(hdc, 228 - 9*inStr.size(), 9, inStr.c_str(), inStr.size()); ReleaseDC(hWnd, hdc);*/ } else //SetWindowText( hEditResult, L"0") ; { psText = L"0"; InvalidateRect (hWnd, NULL, TRUE) ; } break; case '\b' ://Space键 if( LOWORD( wParam ) == '\b' ) if( !inStr.empty () ) { inStr.resize( inStr.size () - 1 ) ; psText = inStr; if(inStr.size() == 0) { psText = L"0"; } InvalidateRect (hWnd, NULL, TRUE) ; /* hdc = GetDC(hWnd); TextOut(hdc, 228 - 9*inStr.size(), 9, inStr.c_str(), inStr.size()); ReleaseDC(hWnd, hdc);*/ } else { if(inStr.size() == 0) { psText = L"0"; } InvalidateRect (hWnd, NULL, TRUE) ; } break; case '+' : case '-' : case '*' : case '/' : { wstring Result ; CCounter::DouToStr( Result, counter.GetResult( LOWORD( wParam ), inStr ) ) ; psText = Result; InvalidateRect (hWnd, NULL, TRUE) ; inStr.clear () ; } break; case '~' : case 0x0073 ://"S"键sqrt case '=' : { wstring Result ; CCounter::DouToStr( Result, counter.GetResult( LOWORD( wParam ), inStr ) ); //SetWindowText( hEditResult, Result.c_str() ) ; InvalidateRect (hWnd, NULL, TRUE) ; psText = Result; /*hdc = GetDC(hWnd); TextOut(hdc, 228 - 9*Result.size(), 9, Result.c_str(), Result.size()); ReleaseDC (hWnd, hdc);*/ inStr.clear () ; } break; } return 0 ; case WM_COMMAND: //case WM_LBUTTONDOWN: // SetFocus(hWnd); wmId = LOWORD(wParam); wmEvent = HIWORD(wParam); // 分析菜单选择: switch (wmId) { case IDM_ABOUT: MessageBox(hWnd,L" 计算器V1.02 GDI版\n\n\n版权所有(C) 2011 JONSEN_CHEN",L"关于",MB_OK | MB_ICONINFORMATION); break; case IDM_EXIT: DestroyWindow(hWnd); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } break; case WM_LBUTTONDOWN: xMouse = LOWORD(lParam); yMouse = HIWORD(lParam); if (OnButton(xMouse, yMouse, 10, 35, 50, 60)) { SendMessage(hWnd,WM_CHAR,'7',0); //如果鼠标在Button‘7’上就向窗口发送一个WM_CHAR消息 } if (OnButton(xMouse, yMouse, 55, 35, 95, 60))// { SendMessage(hWnd,WM_CHAR,'8',0); } if (OnButton(xMouse, yMouse, 100, 35, 140, 60))// { SendMessage(hWnd,WM_CHAR,'9',0); } if (OnButton(xMouse, yMouse, 145, 35, 185, 60))// { SendMessage(hWnd,WM_CHAR,'+',0); } if (OnButton(xMouse, yMouse, 190, 35, 230, 60))//space { SendMessage(hWnd,WM_CHAR, 0x8, 0); } if (OnButton(xMouse, yMouse, 10, 65, 50, 90))// { SendMessage(hWnd,WM_CHAR,'4',0); } if (OnButton(xMouse, yMouse, 55, 65, 95, 90))// { SendMessage(hWnd,WM_CHAR,'5',0); } if (OnButton(xMouse, yMouse, 100, 65, 140, 90))// { SendMessage(hWnd,WM_CHAR,'6',0); } if (OnButton(xMouse,