Change increment amount

kebabman123

Hi!
I have a button and when i press it a spinbox increases it value by one (onclick() Stepup())
The problem i have is that i also have a QLineEdit which i can type a number into.
If i type 3 in the QlineEdit i want the button to increase the Spinbox by 3 and not the default 1.
How would i go about making it so that the button increases the Spinbox value with the number that is in the QLineEdit?!

JonB

@kebabman123
When the user types whatever into the line edit get that number and pass it to QSpinBox::setSingleStep(int val).

P.S.
If your line edit, with the + & - buttons, is used to enter a number that itself should also be (another) QSpinBox :)

kebabman123

@JonB Thanks for the fast reply!
Im very new to this and dont really know how to get the number from the line edit.
How would i go about getting this number so that i can send it to the spinbox?

JonB

@kebabman123
You must learn Signals & Slots, else you won't be able to do anything in Qt.

Then you decide exactly when you want to "accept" and act on the new number being typed in:

QLineEdit::textChanged, QLineEdit::textEdited or QSpinBox::valueChanged are signals which are all emitted when a change is made while editing.
QLineEdit::editingFinished is a signal emitted after a user has finished editing and moves off the line edit.

Pick whichever of these you want. Attach a slot to it. Read the value and use that to change the step size on the other spin box.

kebabman123

@JonB Is this what you mean? Because it is giving me errors.

kebabman123

@JonB Thanks for all your help i actually got it working with this code!
int textValue = ui->lineEdit->text().toInt();
int spinBoxValue = ui->spinBox->value();
spinBoxValue += textValue;
ui->spinBox->setValue(spinBoxValue);

If anyone else was wondering

jsulm

@kebabman123 said in Change increment amount:

Because it is giving me errors

Because you need to call this method on an instance of QSpinBox