how to decrement spinbox values.

Leopold

I know i have to use setValue but i want to increment and decrement by events.
I have inside a void:
m_ui->spinBox-> setValue(m_ui->spinBox-> value()+1)
this works perfect.Now I want to decrement with:
m_ui->spinBox-> setValue(m_ui->spinBox-> value()-1)
this does not work.
How can I solve that?

kenchan

@Leopold
so is the minimum range set to allow for negative values?

Leopold

Hello,
I don't want negative values, i want to decrement.
spinBox = 0.
m_ui->spinBox-> setValue(m_ui->spinBox-> value()+1)
spiBox=1
m_ui->spinBox-> setValue(m_ui->spinBox-> value()+1)
spinBox=2
m_ui->spinBox-> setValue(m_ui->spinBox-> value()-1)
spinBox stays at 2 should become 1

JonB

@Leopold
Your code looks fine, so it must be something else....

mrjj

Hi
I agree with @JonB . That should just work.
Did you try

m_ui->spinBox-> setValue(1);
m_ui->spinBox-> setValue(2);
m_ui->spinBox-> setValue(1);

kenchan

@Leopold yes, i see. as the others say the code looks correct so i was just fishing :-)

Leopold

@mrjj
yes, direct settings work,
increment is good too but decrement with:
m_ui->spinBox-> setValue(m_ui->spinBox-> value()-1)
spinBox stays at 2 should become 1
is not working.
Any an other idea for decrementing by 1 step?
Decrementing by arrows is possible so it should be possible by code too.

mrjj

Hi
Try to do it outside a slot.
I think its related to the event loop and how you trigger setValue slot.
Setting the values directly works so it must drop a setValue or something
like that.

mranger90

Are you perhaps handling the spinbox valueChanged() signal and inadvertently blocking the new value ?

Leopold

Sorry for bothering,
the code works,it was my fault within an if else.
first i incremented,then i decremented so it looked as if nothing had happened.

Pablo J. Rogina

@Leopold is your issue solved? If so, please don't forget to mark your post as such. Thanks.

Solved how to decrement spinbox values.