Update/modify QListWidgetItem - c++

Question

I would like to use QWidgetList to create a list where I can add and delete items automatically, without the user having to interact with the graphical interface. I have this done, but I can't update/modify the text I put in the item when I created it. I have created four items like this:
for (int i = 0; i < 4; i++)
{
QListWidgetItem *lwi = new QListWidgetItem();
lwi->setSizeHint(QSize(200, 20));
lwi->setTextAlignment(Qt::AlignCenter);
lwi->setText(QString("Obstacle ") + QString::number(i));
ui_.list->addItem(lwi);
}
And I have seen that I can modify the text like this:
ui_.list->item(0)->setText(QString::number(updateItem, 'f', 2));
Where updateitem is constantly changing its value.
The problem is that it seems that although the text is modified, but it is updated on screen only when I interact with the window.
Is there any way to update it directly without having to interact? For example, if I do the same with a Label it works correctly and the Label changes its text constantly without the need to interact with it.
I am working with the rqt library for ROS, to develop a plugin created with Qt. Although I believe my problem is directly related to Qt and not to ROS.
Thank you.
EDIT1: I added ui_.list_movil->update() but is not working for me.
void MyPlugin::update_list()
{
if (flagFirstItem == false)
{
for (int i = 0; i < 4; i++)
{
QListWidgetItem *lwi = new QListWidgetItem();
lwi->setSizeHint(QSize(200, 20));
lwi->setTextAlignment(Qt::AlignCenter);
lwi->setText(QString("Obstacle ") + QString::number(i));
ui_.list_movil->addItem(lwi);
}
flagFirstItem = true;
}
if (flagFirstItem == true)
{
for (int i = 0; i < ui_.list_movil->count(); ++i)
{
ui_.list_movil->item(i)->setText(QString::number(updateItem, 'f', 2));
ui_.list_movil->update();
}
}
}
I am adding four items just one time and after that I am trying to modify them. It is not working fine for me because I must click on an item to see the changed text. If I am doing it right, maybe it should be an error with rqt library.
By the way, I am modifying labels like that:
void MyPlugin::imuEuler_callback(const sensor_msgs::Imu msg)
{
if ((ros::Time::now().toSec() - updateTimeImuEuler) >= updateTime)
{
ui_.label_rollValue->setText(QString::number(msg.orientation.x, 'f', 2));
ui_.label_pitchValue->setText(QString::number(msg.orientation.y, 'f', 2));
ui_.label_yawValue->setText(QString::number(msg.orientation.z, 'f', 2));
updateTimeImuEuler = ros::Time::now().toSec();
}
}
And they are all working fine, I dont need to click on them to see the changed text.