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我有一个问题,我的信号和插槽,我想使用一个额外的线程backgroundworker。它假设发送一个带有几个双值的信号,然后在主GUI中更新。那么代码编译和线程也启动,但gui没有更新值。Qt信号和插槽问题
第一图形用户界面槽:
void MainWindow::slot_set_values(double ptm_temp, double ptm_hv, double heat_temp, double nomtemp, double current, double voltage)
{
ui->pmtValueLabel->setText(QString::number(ptm_temp));
ui->hvValueLabel->setText(QString::number(ptm_hv));
ui->heatValueLabel->setText(QString::number(heat_temp));
ui->nomValueLabel->setText(QString::number(nomtemp));
ui->currenValueLabel->setText(QString::number(current));
ui->vValueLabel->setText(QString::number(voltage));
}
工人代码:
void dworker::run()
{
qsrand(QDateTime::currentDateTime().toTime_t());
mData.set_pmt_temp(qrand()%100);
mData.set_pmt_hv(qrand()%100);
mData.set_heat_opt_temp(qrand()%100);
mData.set_heat_nominal_temp(qrand()%100);
for (int i = 0; i<100; i++)
{
double pmt_tmp = mData.get_pmt_temp();
double hv = mData.get_pmt_hv();
double heat_temp = mData.get_heat_opt_temp();
double heat_nom = mData.get_heat_nominal_temp();
emit set_values(pmt_tmp,hv,heat_temp,heat_nom,0,0);
emit set_pmt();
QThread::msleep(1000);
qDebug() << "Test vom Thread " << i;
}
}
和连接语句:
connect(workerthread,SIGNAL(set_values(double,double,double,double,double,double)),
this,SLOT(slot_set_values(double,double,double,double,double,double)));
connect(workerthread,SIGNAL(set_pmt()),this,SLOT(slot_set_pmt()));
http://mayaposch.wordpress.com/2011/11/01/how-to-really-truly-use-qthreads-the-full-解释/ – Huy
Wha t是dWorker类吗?它是你派生出来的类吗?如果是的话,你是否记得包含Q_OBJECT宏?另外,在调试器中运行时,通过连接线时会得到什么输出?如果有问题,它会告诉你那里。 – TheDarkKnight
您是否曾尝试在您的插槽中添加qDebug语句以查看它是否被调用? – dunc123