QStyleOptionButton Class
The QStyleOptionButton class is used to describe the parameters for drawing buttons. 更多...
| 头文件: | #include <QStyleOptionButton> |
| qmake: | QT += widgets |
| 基类: | QStyleOption |
公有类型
| enum | ButtonFeature { None, Flat, HasMenu, DefaultButton, AutoDefaultButton, CommandLinkButton } |
| flags | ButtonFeatures |
| enum | StyleOptionType { Type } |
| enum | StyleOptionVersion { Version } |
公有函数
| QStyleOptionButton() | |
| QStyleOptionButton(const QStyleOptionButton &other) |
- 2 个公有函数继承自 QStyleOption
公有变量
- 8 个公有变量继承自 QStyleOption
详细描述
The QStyleOptionButton class is used to describe the parameters for drawing buttons.
QStyleOptionButton contains all the information that QStyle functions need to draw graphical elements like QPushButton, QCheckBox, and QRadioButton.
For performance reasons, the access to the member variables is direct (i.e., using the . or -> operator). This low-level feel 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.
参见 QStyleOption and QStyleOptionToolButton.
成员类型
enum QStyleOptionButton::ButtonFeature
flags QStyleOptionButton::ButtonFeatures
This enum describes the different types of features a push button can have.
| Constant | Value | Description |
|---|---|---|
QStyleOptionButton::None | 0x00 | Indicates a normal push button. |
QStyleOptionButton::Flat | 0x01 | Indicates a flat push button. |
QStyleOptionButton::HasMenu | 0x02 | Indicates that the button has a drop down menu. |
QStyleOptionButton::DefaultButton | 0x04 | Indicates that the button is a default button. |
QStyleOptionButton::AutoDefaultButton | 0x08 | Indicates that the button is an auto default button. |
QStyleOptionButton::CommandLinkButton | 0x10 | Indicates that the button is a Windows Vista type command link. |
The ButtonFeatures type is a typedef for QFlags<ButtonFeature>. It stores an OR combination of ButtonFeature values.
参见 features.
enum QStyleOptionButton::StyleOptionType
This enum is used to hold information about the type of the style option, and is defined for each QStyleOption subclass.
| Constant | Value | Description |
|---|---|---|
QStyleOptionButton::Type | SO_Button | The type of style option provided (SO_Button for this class). |
The type is used internally by QStyleOption, its subclasses, and 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.
enum QStyleOptionButton::StyleOptionVersion
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption subclass.
| Constant | Value | Description |
|---|---|---|
QStyleOptionButton::Version | 1 | 1 |
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.
参见 StyleOptionType.
成员函数
QStyleOptionButton::QStyleOptionButton()
Constructs a QStyleOptionButton, initializing the members variables to their default values.
QStyleOptionButton::QStyleOptionButton(const QStyleOptionButton &other)
Constructs a copy of the other style option.
成员变量
ButtonFeatures QStyleOptionButton::features
This variable holds a bitwise OR of the features that describe this button
参见 ButtonFeature.
QIcon QStyleOptionButton::icon
This variable holds the icon of the button
The default value is an empty icon, i.e. an icon with neither a pixmap nor a filename.
参见 iconSize.
QSize QStyleOptionButton::iconSize
This variable holds the size of the icon for the button
The default value is QSize(-1, -1), i.e. an invalid size.
QString QStyleOptionButton::text
This variable holds the text of the button
The default value is an empty string.