我做的是一个公交车报站系统,在点击完模拟按钮后,会模拟走完整条路线,但是QListWidget不会动态更新,其中的数据处理部分还是会进行
附上模拟按钮的代码
/* simulate */
void MyDialog::on_pushButton_3_clicked()
{
while (1)
{
// 先清空显示
ui->listWidget->clear();
QFile file("bus_.xml");
if (!file.open(QIODevice::ReadOnly)) return ;
QDomDocument doc;
if (!doc.setContent(&file))
{
file.close();
return ;
}
file.close();
QDomElement docElem = doc.documentElement();
QDomElement c;
QString curstation;
int flag=0, count=0;
QDomNode n = docElem.firstChild();
while(!n.isNull())
{
if (n.isElement())
{
QDomElement e = n.toElement();
QDomNodeList list = e.childNodes();
if (flag == 1)
{
for(int i=0; i<list.count(); i++)
{
QDomNode node = list.at(i);
if(node.isElement())
{
if (i == number)
{ qDebug()<<number;
//ui->listWidget->addItem(new QListWidgetItem(QIcon("yuan.jpg"), node.toElement().text()));
ui->listWidget->setCurrentItem(new QListWidgetItem(QIcon("yuan.jpg"), node.toElement().text()));
curstation = node.toElement().text();
qDebug()<<"next station"<<curstation;
}
else{
//ui->listWidget->addItem(" " + node.toElement().text());
ui->listWidget->setCurrentItem (new QListWidgetItem(QIcon("yuan.jpg"), node.toElement().text()));
}
}
}
}
else
{
QDomNode node_count = list.at(0);
count = node_count.toElement().text().toInt();
//qDebug()<<count;
}
flag++;
}
n = n.nextSibling();
}
//char command[256] = {0};
QString command;
command = _config_2() + curstation ;
qDebug()<<command;
/* yuying */
tts_open_test("/dev/ttyUSB0", (char *)command.toStdString().c_str());
/* net_demo_string */
/* string shuld be utf-8 */
net_demo_string((char *)command.toStdString().c_str());
qDebug()<<"net_demo_string";
/* maybe change */
QByteArray datagram = curstation.toStdString().c_str();
sender->writeDatagram (datagram.data(), datagram.size(), QHostAddress::Broadcast, 45454);
if (count == number)
{
return ;
}
ui->listWidget->update ();
number++;
sleep(1);
}
}