How to use the ui class when I create a qt application

Question

i have created a qt GUI to do some check out task and this show the results in labels. I use QT creator and this creates the header and mainwindow.cpp program. So my problem is that I have declared more methods into the header in order to do some task and with the results update a label but I have the problem that I use while loop and my GUI never starts. I have tried to run in a sequential way (without the loop) and this works but only calls the las function and the program doesn't follow the sequence (for example trying to do ping to server).

Below is a similar mianwindow.cpp program that I have,

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
while(1)
{
    ping2server()
    if(ping2server>0)
            ui->label->setText("The server is alive");
    else
            break;

}
/*the server is dead connecting to other one*/
.
.
//and so on

}

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

int MainWindow::png2server()
{

}
int MainWindow::conn2server()
{
}

Any ideas please let me know. I'm really new in this.

Thank you

laurent · Accepted Answer · 2011-10-28 04:06:05Z

1

You are freezing the whole application when you do a loop like that. Instead, you should use a QTimer and update the label using the timeout() signal.

answered Oct 28, 2011 at 4:06

laurent

91.2k83 gold badges310 silver badges445 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Billy Over a year ago

ok I did but the problem is that I'm using 2 timers and when I use them only one of them is updated and it's the last one. The GUI doesn't show the status of the first timer. why??

Collectives™ on Stack Overflow

How to use the ui class when I create a qt application

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related