<![CDATA[main widget emit signal once, but slot call multiple time]]>my design has main widget and a sub widget. I use qt push button to open the subwidget. but when i close subwidget (x sign) and use the button to open i again, my signal emit once buy my slot function run twice. I close subwidget, and open again via qt push button. now my signal emit once, but my slot function run three time. any ideas

void Main_Widget::launch_sub_widget_button_pushed(){
subwidget_pt = new sub_Widget();
subwidget_pt->show();

connect(this, SIGNAL(mysig() ),
subwidget_pt, SLOT(myslot() ) );
}

signal is emit from another function

void Main_Widget::load_data_button_pushed(){
emit(mysig(void));
}

i try subwidget_pt->close() but it close all my widget including the main one.

]]>https://forum.qt.io/topic/92692/main-widget-emit-signal-once-but-slot-call-multiple-timeRSS for NodeMon, 10 Aug 2026 16:29:22 GMTMon, 16 Jul 2018 17:33:32 GMT60<![CDATA[Reply to main widget emit signal once, but slot call multiple time on Mon, 16 Jul 2018 19:50:10 GMT]]>@s002wjh if your issue is solved, please don't forget to mark you post as such. Thanks.

]]>https://forum.qt.io/post/469845https://forum.qt.io/post/469845Mon, 16 Jul 2018 19:50:10 GMT<![CDATA[Reply to main widget emit signal once, but slot call multiple time on Mon, 16 Jul 2018 18:54:19 GMT]]>@aha_1980

thanks, i saw it will disconnect automatically when i close the sub-widget, guess not. I didn't properly run the destructor, now its working after i run the destructor.

]]>https://forum.qt.io/post/469840https://forum.qt.io/post/469840Mon, 16 Jul 2018 18:54:19 GMT<![CDATA[Reply to main widget emit signal once, but slot call multiple time on Mon, 16 Jul 2018 17:43:09 GMT]]>hi @s002wjh,

you run the connect statement multiple times, therefore the slot is executed multiple times.

Solution: only connect once, then emit as often as you like.

regards

]]>https://forum.qt.io/post/469830https://forum.qt.io/post/469830Mon, 16 Jul 2018 17:43:09 GMT