Member Function Documentation

QSpinBox::QSpinBox(QWidget *parent = Q_NULLPTR)

Constructs a spin box with 0 as minimum value and 99 as maximum value, a step value of 1. The value is initially set to 0. It is parented to parent.

See also setMinimum(), setMaximum(), and setSingleStep().

QSpinBox::~QSpinBox()

Destructor.

[virtual protected] bool QSpinBox::event(QEvent *event)

Reimplemented from QObject::event().

[virtual protected] void QSpinBox::fixup(QString &input) const

Reimplemented from QAbstractSpinBox::fixup().

void QSpinBox::setRange(int minimum, int maximum)

Convenience function to set the minimum, and maximum values with a single function call.

setRange(minimum, maximum);

is equivalent to:

setMinimum(minimum);
setMaximum(maximum);

See also minimum and maximum.

[virtual protected] QString QSpinBox::textFromValue(int value) const

This virtual function is used by the spin box whenever it needs to display the given value. The default implementation returns a string containing value printed in the standard way using QWidget::locale().toString(), but with the thousand separator removed unless setGroupSeparatorShown() is set. Reimplementations may return anything. (See the example in the detailed description.)

Note: QSpinBox does not call this function for specialValueText() and that neither prefix() nor suffix() should be included in the return value.

If you reimplement this, you may also need to reimplement valueFromText() and validate()

See also valueFromText(), validate(), and QLocale::groupSeparator().

[virtual protected] QValidator::State QSpinBox::validate(QString &text, int &pos) const

Reimplemented from QAbstractSpinBox::validate().

[signal] void QSpinBox::valueChanged(int i)

This signal is emitted whenever the spin box's value is changed. The new value's integer value is passed in i.

Note: Signal valueChanged is overloaded in this class. To connect to this one using the function pointer syntax, you must specify the signal type in a static cast, as shown in this example:

connect(spinBox, static_cast<void(QSpinBox::*)(int)>(&QSpinBox::valueChanged),
    [=](int i){ /* ... */ });

Note: Notifier signal for property value.

[signal] void QSpinBox::valueChanged(const QString &text)

This is an overloaded function.

The new value is passed in text with prefix() and suffix().

Note: Signal valueChanged is overloaded in this class. To connect to this one using the function pointer syntax, you must specify the signal type in a static cast, as shown in this example:

connect(spinBox, static_cast<void(QSpinBox::*)(const QString &)>(&QSpinBox::valueChanged),
    [=](const QString &text){ /* ... */ });

Note: Notifier signal for property value.

[virtual protected] int QSpinBox::valueFromText(const QString &text) const

This virtual function is used by the spin box whenever it needs to interpret text entered by the user as a value.

Subclasses that need to display spin box values in a non-numeric way need to reimplement this function.

Note: QSpinBox handles specialValueText() separately; this function is only concerned with the other values.

See also textFromValue() and validate().