Archived:How to use QSpinBox and QSlider

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Qt Quick should be used for all UI development on mobile devices. The approach described in this article (based on QWidget) is deprecated.

Article Metadata

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Tested with

Devices(s): Emulator

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Compatibility

Platform(s): S60 3rd Edition, S60 5th Edition

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Platform Security

Signing Required: Self-Signed

Capabilities: None

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Article

Keywords: QSpinBox,QSlider

Created: kamaljaiswal (21 Dec 2008)

Last edited: hamishwillee (11 Oct 2012)

QSpinBox and the QSlider are rendered inside the QWidget ie QSpinBox and QSlider are compound controls.

QSpinBox *spinBox = new QSpinBox;
QSlider *slider = new QSlider(Qt::Horizontal);

Various Function For SpinBox

• To set the minimum and maximun range of spin box.

spinBox->setMinimum(0);
spinBox->setMaximum(100);

• This property is used to display spinBox prefix For example $50 .

spinBox->setPrefix("$");

ScreenShot

• This property is used to display spinBox suffix ,Example 100Km.

spinBox->setSuffix(" Km");

Various Function For Slider

• Used to fix the tick interval.

slider->setTickInterval ( 5 );

• This property is generally used to tickmark the position of slider.

slider->setTickPosition(QSlider::TicksBothSides); 

ScreenShot

Specifying the range.

spinBox->setRange(0, 130);
slider->setRange(0, 130);

Catching the event generated by the Slider and SpinBox.

QObject::connect(spinBox, SIGNAL(valueChanged(int)),
slider, SLOT(setValue(int)));
QObject::connect(slider, SIGNAL(valueChanged(int)),
spinBox, SLOT(setValue(int)));

Setting a default value

spinBox->setValue(35);

Alignment

QHBoxLayout *layout = new QHBoxLayout;
layout->addWidget(spinBox);
layout->addWidget(slider);
window->setLayout(layout);