The QStyleOptionSlider class is used to describe the parameters needed for drawing a slider. 更多...
| 头： | #include <QStyleOptionSlider> |
| qmake: | QT += widgets |
| 继承： | QStyleOptionComplex |
| enum | StyleOptionType { Type } |
| enum | StyleOptionVersion { Version } |
| QStyleOptionSlider () | |
| QStyleOptionSlider (const QStyleOptionSlider & other ) |
| bool | dialWrapping |
| int | maximum |
| int | minimum |
| qreal | notchTarget |
| Qt::Orientation | orientation |
| int | pageStep |
| int | singleStep |
| int | sliderPosition |
| int | sliderValue |
| int | tickInterval |
| QSlider::TickPosition | tickPosition |
| bool | upsideDown |
The QStyleOptionSlider class is used to describe the parameters needed for drawing a slider.
QStyleOptionSlider contains all the information that QStyle 函数需要绘制 QSlider and QScrollBar .
For performance reasons, the access to the member variables is direct (i.e., using the
.
or
->
operator). This low-level feel makes the structures straightforward to use and emphasizes that these are simply parameters used by the style functions.
对于可以如何使用样式选项的演示范例，见 样式 范例。
另请参阅 QStyleOptionComplex , QSlider ，和 QScrollBar .
This enum is used to hold information about the type of the style option, and is defined for each QStyleOption 子类。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionSlider::Type
|
SO_Slider
|
提供样式选项的类型 ( SO_Slider 对于此类)。 |
类型内部使用通过 QStyleOption ，其子类，和 qstyleoption_cast () to determine the type of style option. In general you do not need to worry about this unless you want to create your own QStyleOption subclass and your own styles.
另请参阅 StyleOptionVersion .
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子类。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionSlider::Version
|
1
|
1 |
版本的使用通过 QStyleOption 子类以实现扩展在不破坏兼容性的情况下。若使用 qstyleoption_cast ()，通常不需要校验它。
另请参阅 StyleOptionType .
构造 QStyleOptionSlider , initializing the members variables to their default values.
构造副本为 other 样式选项。
This variable holds whether the dial should wrap or not
The default value is false, i.e. the dial is not wrapped.
另请参阅 QDial::wrapping ().
This variable holds the maximum value for the slider
默认值为 0。
This variable holds the minimum value for the slider
默认值为 0。
This variable holds the number of pixel between notches
The default value is 0.0.
另请参阅 QDial::notchTarget ().
This variable holds the slider's orientation (horizontal or vertical)
The default orientation is Qt::Horizontal .
另请参阅 Qt::Orientation .
This variable holds the size of the page step of the slider
默认值为 0。
另请参阅 QAbstractSlider::pageStep .
This variable holds the size of the single step of the slider
默认值为 0。
另请参阅 QAbstractSlider::singleStep .
This variable holds the position of the slider handle
If the slider has active feedback (i.e., QAbstractSlider::tracking is true), this value will be the same as sliderValue . Otherwise, it will have the current position of the handle. The default value is 0.
另请参阅 QAbstractSlider::tracking and sliderValue .
This variable holds the value of the slider
If the slider has active feedback (i.e., QAbstractSlider::tracking is true), this value will be the same as sliderPosition . Otherwise, it will have the value the slider had before the mouse was pressed.
默认值为 0。
另请参阅 QAbstractSlider::tracking and sliderPosition .
This variable holds the interval that should be drawn between tick marks
默认值为 0。
This variable holds the position of the slider's tick marks, if any
默认值为 QSlider::NoTicks .
另请参阅 QSlider::TickPosition .
This variable holds the slider control orientation
Normally a slider increases as it moves up or to the right; upsideDown indicates that it should do the opposite (increase as it moves down or to the left). The default value is false, i.e. the slider increases as it moves up or to the right.
另请参阅 QStyle::sliderPositionFromValue (), QStyle::sliderValueFromPosition ()，和 QAbstractSlider::invertedAppearance .
