QSlider 小部件提供垂直 (或水平) 滑块。 更多...
继承 QAbstractSlider .
QSlider 小部件提供垂直 (或水平) 滑块。
The slider is the classic widget for controlling a bounded value. It lets the user move a slider handle along a horizontal or vertical groove and translates the handle's position into an integer value within the legal range.
QSlider has very few of its own functions; most of the functionality is in QAbstractSlider . The most useful functions are setValue () to set the slider directly to some value; triggerAction () 到 simulate the effects of clicking (useful for shortcut keys); setSingleStep (), setPageStep () 到 set the steps; and setMinimum () 和 setMaximum () to define the range of the scroll bar.
QSlider 提供用于控制刻度线的方法。可以使用 setTickPosition () 到 indicate where you want the tickmarks to be, setTickInterval () to indicate how many of them you want. the currently set tick position and interval can be queried using the tickPosition () 和 tickInterval () functions, 分别。
QSlider 继承一组综合信号：
| Signal | 描述 |
|---|---|
| valueChanged () | Emitted when the slider's value has changed. The tracking() determines whether this signal is emitted during user interaction. |
| sliderPressed () | 发射当用户开始拖曳滑块时。 |
| sliderMoved () | 发射当用户拖曳滑块时。 |
| sliderReleased () | 发射当用户释放滑块时。 |
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:
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A slider shown in the Macintosh widget style . |
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A slider shown in the Windows XP widget style . |
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A slider shown in the Plastique widget style . |
This enum specifies where the tick marks are to be drawn relative to the slider's groove and the handle the user moves.
| 常量 | 值 | 描述 |
|---|---|---|
| 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 |
parent argument, if not None, causes self to be owned by Qt instead of PyQt.
Constructs a vertical slider with the given parent .
parent argument, if not None, causes self to be owned by Qt instead of PyQt.
Constructs a slider with the given parent 。 orientation parameter determines whether the slider is horizontal or vertical; the valid values are Qt.Vertical and Qt.Horizontal .
重实现自 QObject.event ().
初始化 option 采用值来自此 QSlider . This method is useful for subclasses when they need a QStyleOptionSlider , but don't want to fill in all the information themselves.
另请参阅 QStyleOption.initFrom ().
重实现自 QWidget.minimumSizeHint ().
重实现自 QWidget.mouseMoveEvent ().
重实现自 QWidget.mousePressEvent ().
重实现自 QWidget.mouseReleaseEvent ().
重实现自 QWidget.paintEvent ().
重实现自 QWidget.sizeHint ().
