QStyleOptionSlider 类

QStyleOptionSlider 类是用于绘制滑块的所需描述参数。更多...

头：	#include <QStyleOptionSlider>
qmake:	QT += widgets
继承：	QStyleOptionComplex

所有成员列表，包括继承成员

公共类型

enum	StyleOptionType { Type }
enum	StyleOptionVersion { Version }

公共函数

	QStyleOptionSlider (const QStyleOptionSlider & other )
	QStyleOptionSlider ()

公共变量

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

详细描述

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 .

成员类型文档编制

enum QStyleOptionSlider:: StyleOptionType

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 .

enum QStyleOptionSlider:: 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 .

成员函数文档编制

QStyleOptionSlider:: QStyleOptionSlider (const QStyleOptionSlider & other )

构造副本为 other 样式选项。

QStyleOptionSlider:: QStyleOptionSlider ()

Constructs a QStyleOptionSlider, initializing the members variables to their default values.

成员变量文档编制

bool QStyleOptionSlider:: dialWrapping

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 ().

int QStyleOptionSlider:: maximum

This variable holds the maximum value for the slider

默认值为 0。

int QStyleOptionSlider:: minimum

This variable holds the minimum value for the slider

默认值为 0。

qreal QStyleOptionSlider:: notchTarget

This variable holds the number of pixel between notches

The default value is 0.0.

另请参阅 QDial::notchTarget ().

Qt::Orientation QStyleOptionSlider:: orientation

This variable holds the slider's orientation (horizontal or vertical)

The default orientation is Qt::Horizontal .

另请参阅 Qt::Orientation .

int QStyleOptionSlider:: pageStep

This variable holds the size of the page step of the slider

默认值为 0。

另请参阅 QAbstractSlider::pageStep .

int QStyleOptionSlider:: singleStep

This variable holds the size of the single step of the slider

默认值为 0。

另请参阅 QAbstractSlider::singleStep .

int QStyleOptionSlider:: sliderPosition

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 .

int QStyleOptionSlider:: 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 .

int QStyleOptionSlider:: tickInterval

This variable holds the interval that should be drawn between tick marks

默认值为 0。

QSlider::TickPosition QStyleOptionSlider:: tickPosition

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 .

bool QStyleOptionSlider:: upsideDown

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 .