The QStyleOptionSlider class is used to describe the parameters needed for drawing a slider. 更多...
| 頭： | #include <QStyleOptionSlider> |
| qmake: | QT += widgets |
| 繼承： | 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 函數需要繪製 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.
對於可以如何使用樣式選項的演示範例，見 樣式 範例。
另請參閱 QStyleOptionComplex , QSlider ，和 QScrollBar .
This enum is used to hold information about the type of the style option, and is defined for each QStyleOption 子類。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionSlider::Type
|
SO_Slider
|
提供樣式選項的類型 ( SO_Slider 對於此類)。 |
類型內部使用通過 QStyleOption ，其子類，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.
另請參閱 StyleOptionVersion .
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子類。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionSlider::Version
|
1
|
1 |
版本的使用通過 QStyleOption 子類以實現擴展在不破壞兼容性的情況下。若使用 qstyleoption_cast ()，通常不需要校驗它。
另請參閱 StyleOptionType .
構造 QStyleOptionSlider , initializing the members variables to their default values.
構造副本為 other 樣式選項。
This variable holds whether the dial should wrap or not
The default value is false, i.e. the dial is not wrapped.
另請參閱 QDial::wrapping ().
This variable holds the maximum value for the slider
默認值為 0。
This variable holds the minimum value for the slider
默認值為 0。
This variable holds the number of pixel between notches
The default value is 0.0.
另請參閱 QDial::notchTarget ().
This variable holds the slider's orientation (horizontal or vertical)
The default orientation is Qt::Horizontal .
另請參閱 Qt::Orientation .
This variable holds the size of the page step of the slider
默認值為 0。
另請參閱 QAbstractSlider::pageStep .
This variable holds the size of the single step of the slider
默認值為 0。
另請參閱 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.
另請參閱 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.
默認值為 0。
另請參閱 QAbstractSlider::tracking and sliderPosition .
This variable holds the interval that should be drawn between tick marks
默認值為 0。
This variable holds the position of the slider's tick marks, if any
默認值為 QSlider::NoTicks .
另請參閱 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.
另請參閱 QStyle::sliderPositionFromValue (), QStyle::sliderValueFromPosition ()，和 QAbstractSlider::invertedAppearance .
