why i am not able to see text data on dynamic label ?

Qt embedded developer

#include "widget.h"
#include "ui_widget.h"
#include <QLabel>
#include <qdatetime.h>
#include <qtimer.h>
#include <qthread.h>
#define TIMEOUT 300

Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);

QTimer::singleShot(1000,this, SLOT(shutdownlabel()));

mtime=   QDateTime::currentMSecsSinceEpoch();

}

Widget::~Widget()
{
delete ui;
}

void Widget::shutdownlabel()
{

qint64 Newtime  = QDateTime::currentMSecsSinceEpoch() - mtime;
//PRINT_INFO<<"newtime: " << Newtime/1000;
Timeremain =  TIMEOUT - (Newtime/1000);

QLabel *label = new QLabel(ui->frame_2);
label->setStyleSheet("border:1px solid black;text-align:cetre;");
label->setGeometry(50,1,202,20);
label->setText("first line");
label->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
QThread::msleep(200);

}

sierdzio

What is ui->frame_2?

You don't call label->show() anywhere, so it probably stays hidden.

JonB

@Qt-embedded-developer said in why i am not able to see text data on dynamic label ?:

QThread::msleep(200);

Additional to @sierdzio , what is this doing here? It's going to cause you problems....

Qt embedded developer

when i wrote below part in constructor it shows label data without label->show()

why this happen ?

qint64 Newtime = QDateTime::currentMSecsSinceEpoch() - mtime;
//PRINT_INFO<<"newtime: " << Newtime/1000;
Timeremain = TIMEOUT - (Newtime/1000);

QLabel *label = new QLabel(ui->frame_2);
label->setStyleSheet("border:1px solid black;text-align:cetre;");
label->setGeometry(50,1,202,20);
label->setText("first line");
label->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
QThread::msleep(200);

SGaist

Hi,

As @sierdzio already wrote, you do not call show on your newly created QLabel.

sierdzio

@Qt-embedded-developer said in why i am not able to see text data on dynamic label ?:

when i wrote below part in constructor it shows label data without label->show()

why this happen ?

Because then your Widget already has this label created when you call Widget->show() elsewhere in your code.