Application windows lags while loop doing.

[Wojtek1990]

How did you meassure that?

Sorry, my mistake ... tasker window was closed by signal/slot.
Could anyone write code which I should put to my program to destroy this f****** lag ?

edit:
Sorry I think that I've understood you wrong.
What to do with this code?

AddressBook *tasker = new AddressBook(this);

AddressBook *tasker = new AddressBook(this);

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[Lykurg]

With passing this as parent, you ensure that the allocated memory will be freed. To really "close" you window use window attribute Qt::WA_DeleteOnClose.

[ChrisW67]

I think "tasker window was closed but main window of app still lags" means that the tasker window no longer responds to input. This line:

while (checkBox()==1) tasker();

while (checkBox()==1) tasker();

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calls tasker() in a loop that never returns to the Qt event loop. The checkbox cannot change and emit clicked() and the window is generally unresponsive unless the event loop is entered.

You could look at using QTimer to run tasker() regularly and then use the checkbox to start/stop the timer.

[Wojtek1990]

You could look at using QTimer to run tasker() regularly and then use the checkbox to start/stop the timer.

Okey, but when I've changed it to ...

if (checkBox()==1) tasker();

if (checkBox()==1) tasker();

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... app laggs too, but just just once (tasker is called 1 time)- I would like to definitely destroy this lag. And thanks for advice how to change this loop - I'll read about QTimer - but as I said problem of lag seems not be here.

[Wojtek1990]

Okey, problem solved by using QThread class.
Thanks for every reply. I've learned a lot from you.