The QStyleOptionTabV2 class is used to describe the parameters necessary for drawing a tabs in Qt 4.1 or above. 更多...
| 頭: | #include <QStyleOptionTabV2> |
| Since: | Qt 4.1 |
| 繼承: | QStyleOptionTab |
| 繼承者: | 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 ,其子類,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 子類以實現擴展在不破壞兼容性的情況下。若使用 qstyleoption_cast (),通常不需要校驗它。
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
.
對於可以如何使用樣式選項的演示範例,見 樣式 範例。
另請參閱 QStyleOptionTab and QStyleOption .
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子類。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionTabV2::Version
|
2
|
2 |
版本的使用通過 QStyleOption 子類以實現擴展在不破壞兼容性的情況下。若使用 qstyleoption_cast (),通常不需要校驗它。
另請參閱 StyleOptionType .
構造 QStyleOptionTabV2 .
構造副本為 other 樣式選項。
構造 QStyleOptionTabV2 copy of the other style option which can be either of the QStyleOptionTabV2 or QStyleOptionTab 類型。
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.
賦值 other style option to this QStyleOptionTabV2 。 other style option can be either of the QStyleOptionTabV2 or QStyleOptionTab 類型。
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.
默認值為 QSize (-1, -1), i.e. an invalid size; use QStyle::pixelMetric () to find the default icon size for tab bars.
另請參閱 QTabBar::iconSize ().