QStyleOptionGroupBox Class
The QStyleOptionGroupBox class describes the parameters for drawing a group box. 更多...
| 头文件: | #include <QStyleOptionGroupBox> |
| qmake: | QT += widgets |
| 开始支持版本: | Qt 4.1 |
| 基类: | QStyleOptionComplex |
公有类型
| enum | StyleOptionType { Type } |
| enum | StyleOptionVersion { Version } |
公有函数
| QStyleOptionGroupBox() | |
| QStyleOptionGroupBox(const QStyleOptionGroupBox &other) |
- 2 个公有函数继承自 QStyleOption
公有变量
| QStyleOptionFrame::FrameFeatures | features |
| int | lineWidth |
| int | midLineWidth |
| QString | text |
| Qt::Alignment | textAlignment |
| QColor | textColor |
- 2 个公有变量继承自 QStyleOptionComplex
- 8 个公有变量继承自 QStyleOption
详细描述
The QStyleOptionGroupBox class describes the parameters for drawing a group box.
QStyleOptionButton contains all the information that QStyle functions need the various graphical elements of a group box.
It holds the lineWidth and the midLineWidth for drawing the panel, the group box's title and the title's alignment and color.
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, QStyleOptionComplex, and QGroupBox.
成员类型
enum QStyleOptionGroupBox::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 |
|---|---|---|
QStyleOptionGroupBox::Type | SO_GroupBox | The type of style option provided (SO_GroupBox 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 QStyleOptionGroupBox::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 |
|---|---|---|
QStyleOptionGroupBox::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
QStyleOptionGroupBox::QStyleOptionGroupBox()
Constructs a QStyleOptionGroupBox, initializing the members variables to their default values.
QStyleOptionGroupBox::QStyleOptionGroupBox(const QStyleOptionGroupBox &other)
Constructs a copy of the other style option.
成员变量
QStyleOptionFrame::FrameFeatures QStyleOptionGroupBox::features
This variable holds the features of the group box frame
The frame is flat by default.
参见 QStyleOptionFrame::FrameFeature.
int QStyleOptionGroupBox::lineWidth
This variable holds the line width for drawing the panel
The value of this variable is, currently, always 1.
int QStyleOptionGroupBox::midLineWidth
This variable holds the mid-line width for drawing the panel
The mid-line width is usually used when drawing sunken or raised group box frames. The value of this variable is, currently, always 0.
QString QStyleOptionGroupBox::text
This variable holds the text of the group box
The default value is an empty string.
参见 QGroupBox::title.
Qt::Alignment QStyleOptionGroupBox::textAlignment
This variable holds the alignment of the group box title
The default value is Qt::AlignLeft.
QColor QStyleOptionGroupBox::textColor
This variable holds the color of the group box title
The default value is an invalid color with the RGB value (0, 0, 0). An invalid color is a color that is not properly set up for the underlying window system.