内容

• 特性
• 公共函数
• 公共槽
• 详细描述

VolumeSlider Class

( Phonon::VolumeSlider )

The VolumeSlider widget provides a slider that is used to control the volume of an audio output device. 更多...

头：	#include <Phonon/VolumeSlider>
Since:	Qt 4.4
继承：	QWidget

• 所有成员列表，包括继承成员

特性

iconSize : QSize maximumVolume : qreal muteVisible : bool orientation : Qt::Orientation

pageStep : int singleStep : int tracking : bool

• 58 特性继承自 QWidget
• 1 特性继承自 QObject

公共函数

	VolumeSlider (QWidget * parent = 0)
	VolumeSlider (AudioOutput * output , QWidget * parent = 0)
	~VolumeSlider ()
AudioOutput *	audioOutput () const
bool	hasTracking () const
QSize	iconSize () const
bool	isMuteVisible () const
qreal	maximumVolume () const
Qt::Orientation	orientation () const
int	pageStep () const
void	setPageStep (int 毫秒 )
void	setSingleStep (int 毫秒 )
void	setTracking (bool tracking )
int	singleStep () const

• 220 公共函数继承自 QWidget
• 29 公共函数继承自 QObject
• 12 公共函数继承自 QPaintDevice

公共槽

void	setAudioOutput (Phonon::AudioOutput * output )
void	setIconSize (const QSize & size )
void	setMaximumVolume (qreal)
void	setMuteVisible (bool)
void	setOrientation (Qt::Orientation)

• 19 公共槽继承自 QWidget
• 1 公共槽继承自 QObject

额外继承成员

• 1 信号继承自 QWidget
• 1 信号继承自 QObject
• 4 static public members inherited from QWidget
• 7 静态公共成员继承自 QObject
• 37 保护函数继承自 QWidget
• 8 保护函数继承自 QObject
• 1 保护函数继承自 QPaintDevice
• 1 保护槽继承自 QWidget

详细描述

The VolumeSlider widget provides a slider that is used to control the volume of an audio output device.

The slider also displays an icon indicating if the volume of the AudioOutput it is connected to is muted. The icon can be removed with setMuteVisible ().

It is possible to set the maximum value of the slider. By default, the minimum and maximum values of the slider are 0.0 (no sound) to 1.0 (the maximum volume the audio output can produce).

Here follows a code example:

    Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory);
    Phonon::createPath(mediaObject, audioOutput);
    Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider;
    volumeSlider->setAudioOutput(audioOutput);
					

另请参阅 Phonon 模块 .

特性文档编制

iconSize : QSize

This property holds the icon size used for the mute button/icon.

The default size is defined by the GUI style.

访问函数：

QSize	iconSize () const
void	setIconSize (const QSize & size )

maximumVolume : qreal

This property holds the maximum volume that can be set with this slider.

By default the maximum value is 1.0 (100%).

访问函数：

qreal	maximumVolume () const
void	setMaximumVolume (qreal)

muteVisible : bool

This property holds whether the mute button/icon next to the slider is visible.

By default the mute button/icon is visible.

访问函数：

bool	isMuteVisible () const
void	setMuteVisible (bool)

orientation : Qt::Orientation

This property holds the orientation of the slider.

取向必须是 Qt::Vertical (默认) 或 Qt::Horizontal .

访问函数：

Qt::Orientation	orientation () const
void	setOrientation (Qt::Orientation)

pageStep : int

此特性保持页面步幅。

The larger of two natural steps that a slider provides and typically corresponds to the user pressing PageUp or PageDown.

Defaults to 5 (5% of the voltage).

访问函数：

int	pageStep () const
void	setPageStep (int 毫秒 )

singleStep : int

此特性保持单步幅。

The smaller of two natural steps that a slider provides and typically corresponds to the user pressing an arrow key.

Defaults to 1 (1% of the voltage).

访问函数：

int	singleStep () const
void	setSingleStep (int 毫秒 )

tracking : bool

This property holds whether slider tracking is enabled.

If tracking is enabled (the default), the volume changes while the slider is being dragged. If tracking is disabled, the volume changes only when the user releases the slider.

访问函数：

bool	hasTracking () const
void	setTracking (bool tracking )

成员函数文档编制

VolumeSlider:: VolumeSlider ( QWidget * parent = 0)

Constructs a new volume slider with the given parent .

VolumeSlider:: VolumeSlider ( AudioOutput * output , QWidget * parent = 0)

Constructs a new volume slider with the given output object and parent .

VolumeSlider:: ~VolumeSlider ()

AudioOutput * VolumeSlider:: audioOutput () const

另请参阅 setAudioOutput ().

[slot] void VolumeSlider:: setAudioOutput ( Phonon::AudioOutput * output )

Sets the audio output object to be controlled by this slider to the specified output 对象。

另请参阅 audioOutput ().