QAbstractSpinBox Class

Property Documentation

accelerated : bool

This property holds whether the spin box will accelerate the frequency of the steps when pressing the step Up/Down buttons.

If enabled the spin box will increase/decrease the value faster the longer you hold the button down.

This property was introduced in Qt 4.2.

Access functions:

acceptableInput : const bool

This property holds whether the input satisfies the current validation

This property was introduced in Qt 4.2.

Access functions:

See also validate(), fixup(), and correctionMode.

alignment : Qt::Alignment

This property holds the alignment of the spin box

Possible Values are Qt::AlignLeft, Qt::AlignRight, and Qt::AlignHCenter.

By default, the alignment is Qt::AlignLeft

Attempting to set the alignment to an illegal flag combination does nothing.

Access functions:

See also Qt::Alignment.

buttonSymbols : ButtonSymbols

This property holds the current button symbol mode

The possible values can be either UpDownArrows or PlusMinus. The default is UpDownArrows.

Note that some styles might render PlusMinus and UpDownArrows identically.

Access functions:

See also ButtonSymbols.

correctionMode : CorrectionMode

This property holds the mode to correct an Intermediate value if editing finishes

The default mode is QAbstractSpinBox::CorrectToPreviousValue.

This property was introduced in Qt 4.2.

Access functions:

See also acceptableInput, validate(), and fixup().

frame : bool

This property holds whether the spin box draws itself with a frame

If enabled (the default) the spin box draws itself inside a frame, otherwise the spin box draws itself without any frame.

Access functions:

keyboardTracking : bool

This property holds whether keyboard tracking is enabled for the spinbox.

If keyboard tracking is enabled (the default), the spinbox emits the valueChanged() and textChanged() signals while the new value is being entered from the keyboard.

E.g. when the user enters the value 600 by typing 6, 0, and 0, the spinbox emits 3 signals with the values 6, 60, and 600 respectively.

If keyboard tracking is disabled, the spinbox doesn't emit the valueChanged() and textChanged() signals while typing. It emits the signals later, when the return key is pressed, when keyboard focus is lost, or when other spinbox functionality is used, e.g. pressing an arrow key.

This property was introduced in Qt 4.3.

Access functions:

readOnly : bool

This property holds whether the spin box is read only.

In read-only mode, the user can still copy the text to the clipboard, or drag and drop the text; but cannot edit it.

The QLineEdit in the QAbstractSpinBox does not show a cursor in read-only mode.

Access functions:

See also QLineEdit::readOnly.

showGroupSeparator : bool

This property holds whether a thousands separator is enabled. By default this property is false.

This property was introduced in Qt 5.3.

Access functions:

specialValueText : QString

This property holds the special-value text

If set, the spin box will display this text instead of a numeric value whenever the current value is equal to minimum(). Typical use is to indicate that this choice has a special (default) meaning.

For example, if your spin box allows the user to choose a scale factor (or zoom level) for displaying an image, and your application is able to automatically choose one that will enable the image to fit completely within the display window, you can set up the spin box like this:

     QSpinBox *zoomSpinBox = new QSpinBox;
     zoomSpinBox->setRange(0, 1000);
     zoomSpinBox->setSingleStep(10);
     zoomSpinBox->setSuffix("%");
     zoomSpinBox->setSpecialValueText(tr("Automatic"));
     zoomSpinBox->setValue(100);

The user will then be able to choose a scale from 1% to 1000% or select "Auto" to leave it up to the application to choose. Your code must then interpret the spin box value of 0 as a request from the user to scale the image to fit inside the window.

All values are displayed with the prefix and suffix (if set), except for the special value, which only shows the special value text. This special text is passed in the QSpinBox::textChanged() signal that passes a QString.

To turn off the special-value text display, call this function with an empty string. The default is no special-value text, i.e. the numeric value is shown as usual.

If no special-value text is set, specialValueText() returns an empty string.

Access functions:

text : const QString

This property holds the spin box's text, including any prefix and suffix

There is no default text.

Access functions:

wrapping : bool

This property holds whether the spin box is circular.

If wrapping is true stepping up from maximum() value will take you to the minimum() value and vice versa. Wrapping only make sense if you have minimum() and maximum() values set.

 QSpinBox *spinBox = new QSpinBox(this);
 spinBox->setRange(0, 100);
 spinBox->setWrapping(true);
 spinBox->setValue(100);
 spinBox->stepBy(1);
 // value is 0

Access functions:

See also QSpinBox::minimum() and QSpinBox::maximum().