The QStyleOptionTabV2 class is used to describe the parameters necessary for drawing a tabs in Qt 4.1 or above. 更多...
| 头: | #include <QStyleOptionTabV2> |
| Since: | Qt 4.1 |
| 继承: | QStyleOptionTab |
| 继承者: | QStyleOptionTabV3 |
| enum | StyleOptionVersion { Version } |
| QStyleOptionTabV2 () | |
| QStyleOptionTabV2 (const QStyleOptionTabV2 & other ) | |
| QStyleOptionTabV2 (const QStyleOptionTab & other ) | |
| QStyleOptionTabV2 & | operator= (const QStyleOptionTab & other ) |
| QSize | iconSize |
The QStyleOptionTabV2 class is used to describe the parameters necessary for drawing a tabs in Qt 4.1 or above.
An instance of the QStyleOptionTabV2 class has type SO_Tab and version 2. 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 and QStyleOptionTabV2 . One way to achieve this is to use the QStyleOptionTabV2 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 .
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 |
|---|---|---|
QStyleOptionTabV2::Version
|
2
|
2 |
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 .
构造 QStyleOptionTabV2 .
构造副本为 other 样式选项。
构造 QStyleOptionTabV2 copy of the other style option which can be either of the QStyleOptionTabV2 or QStyleOptionTab 类型。
If the other style option's version is 1, the new style option's
iconSize
is set to an invalid value. If its version is 2, its
iconSize
value is simply copied to the new style option.
赋值 other style option to this QStyleOptionTabV2 。 other style option can be either of the QStyleOptionTabV2 or QStyleOptionTab 类型。
If the other style option's version is 1, this style option's
iconSize
is set to an invalid size. If its version is 2, its
iconSize
value is simply copied to this style option.
This variable holds the size for the icons.
默认值为 QSize (-1, -1), i.e. an invalid size; use QStyle::pixelMetric () to find the default icon size for tab bars.
另请参阅 QTabBar::iconSize ().