QStyleOptionTabV3 Class

The QStyleOptionTabV3 class is used to describe the parameters necessary for drawing a tabs in Qt 4.5 or above. 更多...

头: #include <QStyleOptionTabV3>
Since: Qt 4.5
继承: QStyleOptionTabV2

公共类型

enum StyleOptionVersion { Version }

公共函数

QStyleOptionTabV3 ()
QStyleOptionTabV3 (const QStyleOptionTabV3 & other )
QStyleOptionTabV3 (const QStyleOptionTabV2 & other )
QStyleOptionTabV3 (const QStyleOptionTab & other )
QStyleOptionTabV3 & operator= (const QStyleOptionTab & other )

公共变量

bool documentMode
QSize leftButtonSize
QSize rightButtonSize

详细描述

The QStyleOptionTabV3 class is used to describe the parameters necessary for drawing a tabs in Qt 4.5 or above.

An instance of the QStyleOptionTabV3 class has type SO_Tab and version 3. The type is used internally by 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. The version is used by 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。

If you create your own QStyle subclass, you should handle both QStyleOptionTab , QStyleOptionTabV2 and QStyleOptionTabV3 . One way to achieve this is to use the QStyleOptionTabV3 copy constructor. For example:

    if (const QStyleOptionTab *tabOption =
           qstyleoption_cast<const QStyleOptionTab *>(option)) {
        QStyleOptionTabV2 tabV2(*tabOption);
        // draw the tab using tabV2
   }
					

In the example above: If tabOption 's version is 1, the extra member ( iconSize ) will be set to an invalid size for tabV2 。若 tabOption 's version is 2, the constructor will simply copy the tab 's iconSize .

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 QStyleOptionTab and QStyleOption .

成员类型文档编制

enum QStyleOptionTabV3:: 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 描述
QStyleOptionTabV3::Version 3 3

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

QStyleOptionTabV3:: QStyleOptionTabV3 ()

构造 QStyleOptionTabV3 .

QStyleOptionTabV3:: QStyleOptionTabV3 (const QStyleOptionTabV3 & other )

构造副本为 other 样式选项。

QStyleOptionTabV3:: QStyleOptionTabV3 (const QStyleOptionTabV2 & other )

构造副本为 other 样式选项。

QStyleOptionTabV3:: QStyleOptionTabV3 (const QStyleOptionTab & other )

构造 QStyleOptionTabV3 copy of the other style option which can be either of the QStyleOptionTabV3 , QStyleOptionTabV2 or QStyleOptionTab 类型。

If the other style option's version is 1 or 2, the new style option's leftButtonSize and rightButtonSize is set to an invalid value. If its version is 3, its leftButtonSize and rightButtonSize values are simply copied to the new style option.

QStyleOptionTabV3 & QStyleOptionTabV3:: operator= (const QStyleOptionTab & other )

赋值 other style option to this QStyleOptionTabV3 other style option can be either of the QStyleOptionTabV3 , QStyleOptionTabV2 or QStyleOptionTab 类型。

If the other style option's version is 1 or 2, the new style option's leftButtonSize and rightButtonSize is set to an invalid value. If its version is 3, its leftButtonSize and rightButtonSize values are simply copied to the new style option.

成员变量文档编制

bool QStyleOptionTabV3:: documentMode

This variable holds whether the tabbar is in document mode.

默认值为 false;

QSize QStyleOptionTabV3:: leftButtonSize

This variable holds the size for the left widget on the tab.

默认值为 QSize (-1, -1), i.e. an invalid size;

QSize QStyleOptionTabV3:: rightButtonSize

This variable holds the size for the right widget on the tab.

默认值为 QSize (-1, -1), i.e. an invalid size;