Function that works with a timer

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I saw there is SetTimer, but if I want that after 10 seconds something happens, for example if I have a function ChangeColor and I want it happens after 10 seconds, how must I write

What I have tried:

In internet I found :

SetTimer (1, 1000, null);

but I don't know I must I write with a function, when I used Qt there was single slot

Posted 18-Sep-19 4:01am

Member 14594285

Updated 19-Sep-19 1:56am

v3

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Member 14594285 18-Sep-19 10:02am

single slot sorry

Stefan_Lang 18-Sep-19 10:26am

You can use the green [Improve question] link at the lower right of your posting to modify it.

Member 14594285 18-Sep-19 10:33am

thanks

2 solutions

Solution 2

The answer of CPallini is correct, but you should write your code more event oriented.

This mean WHEN (and only when) the color is changed you should do something. For instance post a message (or start a one time timer) that the color is changed and handle it somewhere.

Polling regularly on some constant value is a waiste of cpu-power and energy and slows your code. And last but not least it is a source of weired bugs when you poll on different states...

Posted 19-Sep-19 1:56am

KarstenK

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CPallini · Accepted Answer · 2019-09-18T06:13:00

Solution 1

Code samples gently provided by The Documentation: Using Timers - Windows applications | Microsoft Docs[^].

Posted 18-Sep-19 6:13am

CPallini

Comments

Member 14594285 18-Sep-19 12:20pm

yes, but I saw that there isn't a function like QTimer::SingleSlot()
this method it's longer

CPallini 18-Sep-19 12:37pm

That's life. :-)

Rick York 18-Sep-19 21:52pm

Once the timer event has been serviced you can kill the timer and then you have a one-shot timer.

Member 14594285 19-Sep-19 3:49am

I solved

CPallini 19-Sep-19 3:59am

Well done.

Maciej Los 19-Sep-19 4:21am

5ed!