一、函数原型
VOID CALLBACK TimerProc( HWND hwnd, // handle to window UINT uMsg, // WM_TIMER message UINT_PTR idEvent, // timer identifier DWORD dwTime // current system time ); UINT_PTR SetTimer( HWND hWnd, // handle to window UINT_PTR nIDEvent, // timer identifier UINT uElapse, // time-out value TIMERPROC lpTimerFunc // timer procedure );
一、创建或打开文件
HANDLE CreateFile( LPCTSTR lpFileName, // file name DWORD dwDesiredAccess, // access mode DWORD dwShareMode, // share mode LPSECURITY_ATTRIBUTES lpSecurityAttributes, // SD DWORD dwCreationDisposition, // how to create DWORD dwFlagsAndAttributes, // file attributes HANDLE hTemplateFile // handle to template file );
一、GetFileSize函数
DWORD GetFileSize( HANDLE hFile, // handle to file LPDWORD lpFileSizeHigh // high-order word of file size );
QEventLoop类为我们提供了一种进入和退出事件循环的方法。在任何时候，你都可以创建一个QEventLoop实例，并通过调用exec()来启动一个事件循环。在循环期间，主动调用exit()可以使exec()强制返回。
void Worker::run()
{
QEventLoop loop;
QTimer *timer = new QTimer;
connect(timer, &QTimer::timeout, this, [&]()
{
static int count = 0;
qDebug() << QDateTime::currentDateTime().toString();
if(++count == 10) loop.quit();
},
Qt::DirectConnection);
timer->start(1000);
loop.exec();
}
Boost Serialization的主要概念是归档。归档的文件是相当于序列化的C++对象的一个字节流。对象可以通过序列化添加到归档文件，反过来也可从归档文件中加载。
一、自定义数据结构
class DateTime
{
public:
DateTime(int y=0, int m=0, int d=0)
{year = y; month = m; day = d;}
void Display(void)
{cout << year << "-" << month << "-" << day << endl;}
template<class Archive>
friend void serialize(Archive &ar, DateTime &dt, const unsigned int version);
private:
int year;
int month;
int day;
};
一、自定义数据类型
class Data_Record
{
public:
Data_Record(int id = 0, QString name = "", int age = 0, QString addr = "");
void display();
friend QDataStream &operator<<(QDataStream &stream, const Data_Record &data); // 序列化
friend QDataStream &operator>>(QDataStream &stream, Data_Record &data); // 反序列化
private:
int ID;
QString name;
int age;
QString addr;
};
Data_Record::Data_Record(int ID, QString name, int age, QString addr)
{
this->ID = ID;
this->name = name;
this->age = age;
this->addr = addr;
}
void Data_Record::display()
{
qDebug() << ID << name << age << addr;
}
QDataStream &operator<<(QDataStream &stream, const Data_Record &data)
{
stream << data.ID << data.name << data.age << data.addr;
return stream;
}
QDataStream &operator>>(QDataStream &stream, Data_Record &data)
{
stream >> data.ID >> data.name >> data.age >> data.addr;
return stream;
}
一、Qt基本数据类型的序列化
QFile file1("QText.dat");
if(!file1.open(QIODevice::WriteOnly | QIODevice::Text)) return;
QDataStream out(&file1);
QString str1 = "中华人民共和国";
int iData1 = 10000;
double dData1 = 3.14;
QVector<int> vec1 = {0,1,2,3,4,5,6,7,8,9};
out << str1 << iData1 << dData1 << vec1;
file1.close();
一、函数原型
HMODULE GetModuleHandle( LPCTSTR lpModuleName // module name );
二、函数介绍
1、返回值
HMODULE，如执行成功成功，则返回模块句柄。零表示失败。获取错误信息，请调用GetLastError。
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#include <Windows.h>
#include <tchar.h>
// 窗口处理函数
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_DESTROY:
PostQuitMessage(0); // 发送WM_QUIT消息，结束程序
break;
}
return DefWindowProc(hWnd, uMsg, wParam, lParam); // 系统默认窗口处理函数
}
INT WINAPI _tWinMain(
_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPTSTR lpCmdLine,
_In_ INT nShowCmd)
{
WNDCLASS wc;
HWND hWnd;
MSG msg;
// 注册窗口类
ZeroMemory(&wc, sizeof(wc));
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = TEXT("BasicWindow");
RegisterClass(&wc);
// 创建窗口
hWnd = CreateWindow(TEXT("BasicWindow"), TEXT("BasicWindow"),
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
// 显示窗口
ShowWindow(hWnd, nShowCmd);
UpdateWindow(hWnd);
// 消息循环
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
一、窗口处理函数
LRESULT CALLBACK WindowProc( HWND hwnd, // handle to window UINT uMsg, // message identifier WPARAM wParam, // first message parameter LPARAM lParam // second message parameter );
二、窗口类
typedef struct _WNDCLASS {
UINT style;
WNDPROC lpfnWndProc;
int cbClsExtra;
int cbWndExtra;
HINSTANCE hInstance;
HICON hIcon;
HCURSOR hCursor;
HBRUSH hbrBackground;
LPCTSTR lpszMenuName;
LPCTSTR lpszClassName;
} WNDCLASS, *PWNDCLASS;
ATOM RegisterClass(
CONST WNDCLASS *lpWndClass // class data
);