Suggestion needing regarding displaying large number of items one-by-one

[qtzcute]

Hi all,

Can anyone suggest me what will be an efficient way to generate approximately 100 qgraphics items (e.g. squares or rectangles) 'one-by-one'?

What i do now is that i just call an object of my class (responsible for generating the items) 100 times using a for-loop. But when i run my application all the items appear at the same time after a little pause.

What should i do to make them appear one-by-one?

:o

[jsmith]

start a timer.
call to display item when timer is elapsed say 100ms

[qtzcute]

Nah...timer isn't working for me. i create shapes by making object of my class named sqMap



...
...
square = new sqMap(tempWidth, tempHeight);
...
/*
QTimer *timer = new QTimer(this);
timer->start(1000);
*/
...
...



If timer is used nothing seems to happen. My shapes still not appearing one-by-one even if i set the timer to 10000. It seems like the timer is not working in first place because i get output very early than 10000 msec.

Am i using the timer wrongly?
Is there any other way?
Will QThread do the magic?

Thanks

[Boron]

You should connect the timers' signal timeout() to a slot that displays the newly created item.

[qtzcute]

Still no success. All items appear at a same time. :(

Following is a snippet from my code.


for(int j = 0; j < 200 ; j++)
{
...
...
makeAshape(tempWidth,tempHeight,j);
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(makeAshape()));
timer->start(1000);
...
...
}

void MainWindow::makeAshape(double tempWidth, double tempHeight, int j)
{
square = new sqMap(tempWidth, tempHeight, processInfoVector[j], tableView_processInfo, tableView_filesInfo);
}