use Qtimer in gui application with some thread at background

[k.qasempour]

how can i use Qtimer in gui application with some thread at background?
plz give me an example

[codeman]

What would you like to achieve in detail?

[high_flyer]

how can i use Qtimer in gui application with some thread at background?

This is generally bad idea, specially when its asked by a newbie.
You probably don't need a thread.
How to use a QTimer.

[k.qasempour]

well... let me explain the situsatuion... for example i have 100 links. im trying to download each of them with an Qhttp object..

for(link1 to link100)
{
.
.
.
QHttp myHttp = new QHttp(some host);
myHttp.get(some path)
}

till here.. ok?

as u know Qhttp inhertis from Qobject and also Qobject inherits from Qthread so, each instance of Qhttp is a thread by itself... thus the multithreading part is done... is it right?

now i need to make some delay between my requests.. for example 5 seconde.... i add this code to the above code....


for(link1 to link100)
{
.
.
.
QHttp myHttp = new QHttp(some host);
myHttp.get(some path)
QTimer timer;
connect(timer,SIGNAL(timeout()),this,SLOT(someslot ()))
timer.start(5000);
}

but it does not work....

is it clear? if not i can paste my code here.. thanks

[wysota]

QObject does not inherit QThread. QHttp is not a thread.

[k.qasempour]

so u r right... i made a mistake ... QThread inherits Qobject...
am i wrong? i mean each instance of QHttp isnt a thread by it self?

[Lesiok]

k.qasempour, the question of the foundations of C++ : what happens with timer at line 11 ?

for(link1 to link100)
{
.
.
.
QHttp myHttp = new QHttp(some host);
myHttp.get(some path)
QTimer timer;
connect(timer,SIGNAL(timeout()),this,SLOT(someslot ()))
timer.start(5000);
}

for(link1 to link100)
{
.
.
.
QHttp myHttp = new QHttp(some host);
myHttp.get(some path)
QTimer timer;
connect(timer,SIGNAL(timeout()),this,SLOT(someslot ()))
timer.start(5000);
}

To copy to clipboard, switch view to plain text mode 

[k.qasempour]

i know what u mean... but now my question is
each instance of QHttp isnt a thread by it self?

[high_flyer]

each instance of QHttp isnt a thread by it self?

You tell us!
QHttp

[wysota]

i mean each instance of QHttp isnt a thread by it self?

Read the docs, please.

[saman_artorious]

As far as it is concerned with this particular post, I solve my own problem using single shots. let's say you need to execute a slot two seconds after:

QTimer::singleshot(2000, this, SLOT(slotname()));

I used singleshot inside most of my objects in a project. if you still have problems with it, I can check it out for further details.

and, singleshot or your QTimer.start do not delay the execution of the instruction below them. each timers as soon as called, will be run as a seperate thread. it's like a parent process creating a child of his own using fork() in c.

[wysota]

each timers as soon as called, will be run as a seperate thread.

No, that's false.

[k.qasempour]

it does not work again....
here is my code... whats the problem?

QTimer::singleShot(2000, this, SLOT(fake()));


void MainWindow::fake()
{
int a;
a++;

}

[wysota]

This code does not do anything so how do you know it doesn't work?