QT中QtConcurrent建立並行執行緒的方法
阿新 • • 發佈:2018-11-09
標頭檔案中:
#include <QtConcurrentRun>
#include <QProcess>
#include <QFuture>
protected:
bool event(QEvent *event);
/*
自定義的ProgressEvent結構體
*/
struct ProgressEvent : public QEvent
{
enum {EventId = QEvent::User};
explicit ProgressEvent(bool saved_, const DWORD &message_)
: QEvent(static_cast<QEvent::Type>(EventId)),
saved(saved_), message(message_) {}
const bool saved;
const DWORD message;
};
在類的成員函式中寫:
QFuture<void> future = QtConcurrent::run(runVipNet,this,path);
//阻塞主執行緒直到計算完成
future.waitForFinished();
runVipNet是類外函式:
//
void runVipNet(QMainWindow *receiver,QString _path)
{
QApplication::postEvent(receiver,new ProgressEvent(true, (DWORD)QThread::currentThreadId()));
MainWindow* s = (MainWindow*) receiver;
//獲取執行緒ID
s->addThreadID((DWORD)QThread::currentThreadId());
//執行外部exe
QProcess::startDetached(_path,QStringList());
}
//
bool MainWindow::event(QEvent *event)
{
if (event->type() == static_cast<QEvent::Type>(ProgressEvent::EventId))
{
ProgressEvent *progressEvent = static_cast<ProgressEvent*>(event);
Q_ASSERT(progressEvent);
ui->textBrowser->append(QString::number(progressEvent->message));
return true;
}
return QMainWindow::event(event);
}
/*
自定義的ProgressEvent結構體
*/
struct ProgressEvent : public QEvent
{
enum {EventId = QEvent::User};
explicit ProgressEvent(bool saved_, const DWORD &message_)
: QEvent(static_cast<QEvent::Type>(EventId)),
saved(saved_), message(message_) {}
const bool saved;
const DWORD message;
};