<![CDATA[Stop QTimer and Variable scope issue]]>Hi all,

I want to have a QTimer keep running, but sometimes I need to stop and resume this timer.
I have code as below:

void MainWindow::on_pushButton_3_clicked()
{
    QTimer *MainLoopTimer;

    MainLoopTimer = new QTimer();
    connect(MainLoopTimer, SIGNAL(timeout()), this, SLOT(timerUpDate()));
    MainLoopTimer->start(100);
}

void MainWindow::on_pushButton_7_pressed()
{
     MainLoopTimer->stop();
}

As you can see, "MainLoopTimer" cannot been seen in "on_pushButton_7_pressed()", so I don't know how to stop this timer.

Appreciate for any suggestion,
Thanks,

]]>https://forum.qt.io/topic/77119/stop-qtimer-and-variable-scope-issueRSS for NodeMon, 20 Apr 2026 01:01:15 GMTSat, 11 Mar 2017 14:32:22 GMT60<![CDATA[Reply to Stop QTimer and Variable scope issue on Sat, 11 Mar 2017 20:02:50 GMT]]>Hi @Hiloshi ,

As suggested by @Flotisable

Your QTimer can a var member

in your MainWindow.h

.
.
.
Private :
QTimer *mTimer;

In your MainWindow.cpp

mTimer = new QTimer();
.
.
.
.

void MainWindow::on_pushButton_7_pressed()
{
     mTimer->stop();
}
.
.
.
]]>https://forum.qt.io/post/381455https://forum.qt.io/post/381455Sat, 11 Mar 2017 20:02:50 GMT<![CDATA[Reply to Stop QTimer and Variable scope issue on Sat, 11 Mar 2017 14:38:26 GMT]]>@Hiloshi
I think you can declare MainLoopTimer as MainWindow's member

]]>https://forum.qt.io/post/381438https://forum.qt.io/post/381438Sat, 11 Mar 2017 14:38:26 GMT