QSlider Class Reference |
Signal | Description |
---|---|
valueChanged() | Emitted when the slider's value has changed. The tracking() determines whether this signal is emitted during user interaction. |
sliderPressed() | Emitted when the user starts to drag the slider. |
sliderMoved() | Emitted when the user drags the slider. |
sliderReleased() | Emitted when the user releases the slider. |
QSlider only provides integer ranges. Note that although QSlider handles very large numbers, it becomes difficult for users to use a slider accurately for very large ranges.
A slider accepts focus on Tab and provides both a mouse wheel and a keyboard interface. The keyboard interface is the following:
A slider shown in the Macintosh widget style. | |
A slider shown in the Windows XP widget style. | |
A slider shown in the Plastique widget style. |
See also QScrollBar, QSpinBox, QDial, GUI Design Handbook: Slider, and Sliders Example.
This enum specifies where the tick marks are to be drawn relative to the slider's groove and the handle the user moves.
Constant | Value | Description |
---|---|---|
QSlider::NoTicks | 0 | Do not draw any tick marks. |
QSlider::TicksBothSides | 3 | Draw tick marks on both sides of the groove. |
QSlider::TicksAbove | 1 | Draw tick marks above the (horizontal) slider |
QSlider::TicksBelow | 2 | Draw tick marks below the (horizontal) slider |
QSlider::TicksLeft | TicksAbove | Draw tick marks to the left of the (vertical) slider |
QSlider::TicksRight | TicksBelow | Draw tick marks to the right of the (vertical) slider |
This property holds the interval between tickmarks.
This is a value interval, not a pixel interval. If it is 0, the slider will choose between lineStep() and pageStep().
The default value is 0.
Access functions:
See also tickPosition, lineStep(), and pageStep().
This property holds the tickmark position for this slider.
The valid values are described by the QSlider::TickPosition enum.
The default value is QSlider::NoTicks.
Access functions:
See also tickInterval.
Constructs a vertical slider with the given parent.
Constructs a slider with the given parent. The orientation parameter determines whether the slider is horizontal or vertical; the valid values are Qt::Vertical and Qt::Horizontal.
Destroys this slider.
Initialize option with the values from this QSlider. This method is useful for subclasses when they need a QStyleOptionSlider, but don't want to fill in all the information themselves.
See also QStyleOption::initFrom().
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