For performance reasons, there are few member functions and the access to the member variables is direct (i.e., using the
-> operator). This makes the structures straightforward to use and emphasizes that these are simply parameters used by the style functions.
For an example demonstrating how style options can be used, see the Styles example.
version – int
This enum is used to hold information about the type of the style option, and is defined for each
The type of style option provided (
SO_GraphicsItemfor this class).
The type is used internally by
QStyleOption , its subclasses, and 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.
This enum is used to hold information about the version of the style option, and is defined for each
The version is used by
QStyleOption subclasses to implement extensions without breaking compatibility. If you use , you normally do not need to check it.
- Return type
Returns the level of detail from the
Its value represents the maximum value of the height and width of a unity rectangle, mapped using the
worldTransform of the painter used to draw the item. By default, if no transformations are applied, its value is 1. If zoomed out 1:2, the level of detail will be 0.5, and if zoomed in 2:1, its value is 2.
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