Vertical slider again
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Hi,
Do you mean you want
zto have the same value as the slider ? -
Then it's simply:
z = position; -
Hello,
My topic is mark as solved but i got a new error :
i have :
Hello guys,
i want to use a vertical slider to increase a variable
void MainWindow::on_verticalSlider_sliderMoved(int position) { ui->verticalSlider->setRange(1,50); z++; }but as i didn't expected, is that whenever the slider moove he will increment the variable z.
But i want that the slider decrease the variable z when he go down.
and increase when he go up !thanks for your help
void MainWindow::on_verticalSlider_sliderMoved(int position)
{
ui->verticalSlider->setRange(1,50);
z++;
}Well you definitely don't need to call
setRangemore than once on a slider. So remove that line.Then what you need is:
void MainWindow::on_verticalSlider_sliderMoved(int position) { z = position; }Edit: @SGaist beat me to it. ;)
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What exactly do you want to do with
z?What is your goals ?
That would help us understand what you are trying to achieve.
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Call setRange in your MainWindow constructor.
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That line:
ui->verticalSlider->setRange(1,50);you should call it in the MainWindow constructor.And since you are using a Designer based interface you can also set the min and max values in Designer and avoid the setRange call.
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Well... Yes if you use it somewhere else.
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Where exactly ? Depending on that, there's not even a need for
z. You can get the value directly from the slider. -
@Payx said in Vertical slider again:
It depends where i use my "z" ?
How ?
What do you use
zfor? Also side note, that's a horrible name for a variable locally much less one that is used at a class or global level.What @SGaist is saying is you can always get the value of the slider from the slider itself without saving it to a variable. The function
ui->verticalSlider->sliderPosition()will always contain the same value that yourzwould.So with that in mind you can get rid of that whole overridden function and just call
sliderPosition()when you need the value.
