Delayed function call?

Dan203

I have a function I want to run after a dialog is displayed. I tried calling it from the showEvent handler but that's still fired before the dialog is actually displayed. Is there a way to do an async call that is delayed by a second? Or some way to fire the function after the dialog is actually displayed?

SGaist

Hi,

How/when are you showing that dialog ?

Dan203

@SGaist said in Delayed function call?:

Hi,

How/when are you showing that dialog ?

I'm calling dlg.exec() from another dialog

JoeCFD

add a one time timer(1s) in the showEvent to trigger it.

Dan203

@JoeCFD How do I do that? I'm new to Qt

SGaist

Then you can call your method after your exec call.

Isn't that what you are doing ?

eyllanesc

@Dan203 use QTimer:

QTimer::singleShot(1000, [](){ qDebug() << "test"; });
dlg.exec();

Dan203

@SGaist said in Delayed function call?:

Then you can call your method after your exec call.

Isn't that what you are doing ?

No it's calling a function inside the dialog. Basically simulating clicking one of the buttons automatically.

I'm porting this from MFC. In MFC I use PostMessage to send a fake click to the button and it works as expected. Just trying to recreate it in Qt.

JoeCFD

@Dan203 in showEvent
QTimer::singleShot(1000, this, &yourfunc ); if yourfunc is in the dialog.

Dan203

@JoeCFD said in Delayed function call?:

QTimer::singleShot(1000, this, &yourfunc );

That's exactly what I needed! Thanks