QStyleOptionProgressBarV2 Class Reference
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QtGui

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The QStyleOptionProgressBarV2 class is used to describe the parameters necessary for drawing a progress bar in Qt 4.1 or above. 更多...

继承 QStyleOptionProgressBar .

类型

enum StyleOptionType { Type }
enum StyleOptionVersion { Version }

方法

__init__ ( self )
__init__ ( self , QStyleOptionProgressBar other )
__init__ ( self , QStyleOptionProgressBarV2 other )

Members

bool bottomToTop
bool invertedAppearance
Qt.Orientation orientation

详细描述

The QStyleOptionProgressBarV2 class is used to describe the parameters necessary for drawing a progress bar in Qt 4.1 or above.

An instance of this class has type SO_ProgressBar and version 2.

The type is used internally by QStyleOption , its subclasses, and qstyleoption_cast () 到 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. The version is used by QStyleOption subclasses to implement extensions without breaking compatibility. 若使用 qstyleoption_cast (), you normally do not need to check it.

If you create your own QStyle subclass, you should handle both QStyleOptionProgressBar and QStyleOptionProgressBarV2. One way to achieve this is to use the QStyleOptionProgressBarV2 copy constructor. For example:

     if (const QStyleOptionProgressBar *progressBarOption =
            qstyleoption_cast<const QStyleOptionProgressBar *>(option)) {
         QStyleOptionProgressBarV2 progressBarV2(*progressBarOption);
         // draw the progress bar using progressBarV2
     }

In the example above: If the progressBarOption 's version is 1, the extra members ( orientation , invertedAppearance , and bottomToTop ) are set to default values for progressBarV2 。若 progressBarOption 's version is 2, the constructor will simply copy the extra members to progressBarV2.

For an example demonstrating how style options can be used, see the 样式范例。

类型文档编制

QStyleOptionProgressBarV2.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
`QStyleOptionProgressBarV2.Type`	`SO_ProgressBar`	The type of style option provided ( SO_ProgressBar for this class).

另请参阅 StyleOptionVersion .

QStyleOptionProgressBarV2.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
`QStyleOptionProgressBarV2.Version`	`2`	2

The version is used by QStyleOption subclasses to implement extensions without breaking compatibility. If you use qstyleoption_cast (), you normally do not need to check it.

另请参阅 StyleOptionType .

方法文档编制

QStyleOptionProgressBarV2.init ( self )

构造 QStyleOptionProgressBarV2 , initializing he members variables to their default values.

QStyleOptionProgressBarV2.init ( self , QStyleOptionProgressBar other )

构造副本为 other style option which can be either of the QStyleOptionProgressBar and QStyleOptionProgressBarV2 类型。

若 other style option's version is 1, the extra members ( orientation , invertedAppearance , and bottomToTop ) are set to default values for the new style option. If other 's version is 2, the extra members are simply copied.

另请参阅 version .

QStyleOptionProgressBarV2.init ( self , QStyleOptionProgressBarV2 other )

构造副本为 other 样式选项。

Member Documentation

bool bottomToTop

This variable holds whether the text reads from bottom to top when the progress bar is vertical.

默认值为 false。

另请参阅 QProgressBar.textDirection .

bool invertedAppearance

This variable holds whether the progress bar's appearance is inverted.

默认值为 false。

另请参阅 QProgressBar.invertedAppearance .

Qt.Orientation orientation

This variable holds the progress bar's orientation (horizontal or vertical); the default orentation is Qt.Horizontal.

另请参阅 QProgressBar.orientation .

QStyleOptionProgressBarV2 Class Reference [ QtGui module]

类型

方法