内容

• 公共类型
• 公共函数
• 静态公共成员
• 详细描述
• 设置样式
• 开发感知样式的自定义 Widget
• 创建自定义样式
• 使用自定义样式
• 从右到左桌面
• 在项视图中的样式

QStyle 类

The QStyle 类是封装 GUI 外观和感觉的抽象基类。 更多...

头：	#include <QStyle>
qmake:	QT += widgets
继承：	QObject
继承者：	QCommonStyle

• 所有成员列表，包括继承成员
• 过时成员

公共类型

enum	ComplexControl { CC_SpinBox, CC_ComboBox, CC_ScrollBar, CC_Slider, ..., CC_CustomBase }
enum	ContentsType { CT_CheckBox, CT_ComboBox, CT_HeaderSection, CT_LineEdit, ..., CT_MdiControls }
enum	ControlElement { CE_PushButton, CE_PushButtonBevel, CE_PushButtonLabel, CE_DockWidgetTitle, ..., CE_ShapedFrame }
enum	PixelMetric { PM_ButtonMargin, PM_DockWidgetTitleBarButtonMargin, PM_ButtonDefaultIndicator, PM_MenuButtonIndicator, ..., PM_DefaultLayoutSpacing }
enum	PrimitiveElement { PE_FrameStatusBar, PE_PanelButtonCommand, PE_FrameDefaultButton, PE_PanelButtonBevel, ..., PE_PanelMenu }
enum	RequestSoftwareInputPanel { RSIP_OnMouseClickAndAlreadyFocused, RSIP_OnMouseClick }
enum	StandardPixmap { SP_TitleBarMinButton, SP_TitleBarMenuButton, SP_TitleBarMaxButton, SP_TitleBarCloseButton, ..., SP_CustomBase }
flags	State
enum	StateFlag { State_None, State_Active, State_AutoRaise, State_Children, ..., State_Small }
enum	StyleHint { SH_EtchDisabledText, SH_DitherDisabledText, SH_ScrollBar_ContextMenu, SH_ScrollBar_MiddleClickAbsolutePosition, ..., SH_SpinBox_StepModifier }
enum	SubControl { SC_None, SC_ScrollBarAddLine, SC_ScrollBarSubLine, SC_ScrollBarAddPage, ..., SC_All }
flags	SubControls
enum	SubElement { SE_PushButtonContents, SE_PushButtonFocusRect, SE_PushButtonLayoutItem, SE_CheckBoxIndicator, ..., SE_ToolBarHandle }

公共函数

	QStyle ()
virtual	~QStyle ()
int	combinedLayoutSpacing (QSizePolicy::ControlTypes controls1 , QSizePolicy::ControlTypes controls2 , Qt::Orientation orientation , QStyleOption * option = nullptr, QWidget * widget = nullptr) const
virtual void	drawComplexControl (QStyle::ComplexControl control , const QStyleOptionComplex * option , QPainter * painter , const QWidget * widget = nullptr) const = 0
virtual void	drawControl (QStyle::ControlElement element , const QStyleOption * option , QPainter * painter , const QWidget * widget = nullptr) const = 0
virtual void	drawItemPixmap (QPainter * painter , const QRect & rectangle , int alignment , const QPixmap & pixmap ) const
virtual void	drawItemText (QPainter * painter , const QRect & rectangle , int alignment , const QPalette & palette , bool enabled , const QString & text , QPalette::ColorRole textRole = QPalette::NoRole) const
virtual void	drawPrimitive (QStyle::PrimitiveElement element , const QStyleOption * option , QPainter * painter , const QWidget * widget = nullptr) const = 0
virtual QPixmap	generatedIconPixmap (QIcon::Mode iconMode , const QPixmap & pixmap , const QStyleOption * option ) const = 0
virtual QStyle::SubControl	hitTestComplexControl (QStyle::ComplexControl control , const QStyleOptionComplex * option , const QPoint & position , const QWidget * widget = nullptr) const = 0
virtual QRect	itemPixmapRect (const QRect & rectangle , int alignment , const QPixmap & pixmap ) const
virtual QRect	itemTextRect (const QFontMetrics & metrics , const QRect & rectangle , int alignment , bool enabled , const QString & text ) const
virtual int	layoutSpacing (QSizePolicy::ControlType control1 , QSizePolicy::ControlType control2 , Qt::Orientation orientation , const QStyleOption * option = ..., const QWidget * widget = ...) const = 0
virtual int	pixelMetric (QStyle::PixelMetric metric , const QStyleOption * option = nullptr, const QWidget * widget = nullptr) const = 0
virtual void	polish (QWidget * widget )
virtual void	polish (QApplication * application )
virtual void	polish (QPalette & palette )
const QStyle *	proxy () const
virtual QSize	sizeFromContents (QStyle::ContentsType type , const QStyleOption * option , const QSize & contentsSize , const QWidget * widget = nullptr) const = 0
virtual QIcon	standardIcon (QStyle::StandardPixmap standardIcon , const QStyleOption * option = ..., const QWidget * widget = ...) const = 0
virtual QPalette	standardPalette () const
virtual int	styleHint (QStyle::StyleHint hint , const QStyleOption * option = nullptr, const QWidget * widget = nullptr, QStyleHintReturn * returnData = nullptr) const = 0
virtual QRect	subControlRect (QStyle::ComplexControl control , const QStyleOptionComplex * option , QStyle::SubControl subControl , const QWidget * widget = nullptr) const = 0
virtual QRect	subElementRect (QStyle::SubElement element , const QStyleOption * option , const QWidget * widget = nullptr) const = 0
virtual void	unpolish (QWidget * widget )
virtual void	unpolish (QApplication * application )

• 31 公共函数继承自 QObject

静态公共成员

QRect	alignedRect (Qt::LayoutDirection direction , Qt::Alignment alignment , const QSize & size , const QRect & rectangle )
int	sliderPositionFromValue (int min , int max , int logicalValue , int span , bool upsideDown = false)
int	sliderValueFromPosition (int min , int max , int position , int span , bool upsideDown = false)
const QMetaObject	staticMetaObject
Qt::Alignment	visualAlignment (Qt::LayoutDirection direction , Qt::Alignment alignment )
QPoint	visualPos (Qt::LayoutDirection direction , const QRect & boundingRectangle , const QPoint & logicalPosition )
QRect	visualRect (Qt::LayoutDirection direction , const QRect & boundingRectangle , const QRect & logicalRectangle )

• 9 静态公共成员继承自 QObject

额外继承成员

• 1 特性继承自 QObject
• 1 公共槽继承自 QObject
• 2 信号继承自 QObject
• 9 保护函数继承自 QObject

详细描述

The QStyle 类是封装 GUI 外观和感觉的抽象基类。

Qt contains a set of QStyle subclasses that emulate the styles of the different platforms supported by Qt (QWindowsStyle, QMacStyle etc.). By default, these styles are built into the Qt GUI module. Styles can also be made available as plugins.

Qt's built-in widgets use QStyle to perform nearly all of their drawing, ensuring that they look exactly like the equivalent native widgets. The diagram below shows a QComboBox 按 9 种不同风格。

话题：

设置样式

可以设置整个应用程序的样式使用 QApplication::setStyle () 函数。它也可以由应用程序用户指定，使用 -style 命令行选项：

./myapplication -style windows
					

若未指定样式，Qt 会为用户平台或桌面环境选取最合适样式。

还可以为个别小部件设置样式使用 QWidget::setStyle () 函数。

开发感知样式的自定义 Widget

If you are developing custom widgets and want them to look good on all platforms, you can use QStyle functions to perform parts of the widget drawing, such as drawItemText (), drawItemPixmap (), drawPrimitive (), drawControl ()，和 drawComplexControl ().

Most QStyle draw functions take four arguments:

• 指定要绘制图形元素的枚举值
• a QStyleOption 指定如何及在哪里渲染该元素
• a QPainter 用于绘制元素
• a QWidget 在其上履行绘制 (可选)

例如，若希望在 Widget 中绘制聚焦矩形，可以编写：

void MyWidget::paintEvent(QPaintEvent * /* event */)
{
    QPainter painter(this);
    QStyleOptionFocusRect option;
    option.initFrom(this);
    option.backgroundColor = palette().color(QPalette::Background);
    style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
}
					

QStyle gets all the information it needs to render the graphical element from QStyleOption . The widget is passed as the last argument in case the style needs it to perform special effects (such as animated default buttons on macOS ), but it isn't mandatory. In fact, you can use QStyle to draw on any paint device, not just widgets, by setting the QPainter 正确。

QStyleOption has various subclasses for the various types of graphical elements that can be drawn. For example, PE_FrameFocusRect 期望 QStyleOptionFocusRect 自变量。

To ensure that drawing operations are as fast as possible, QStyleOption and its subclasses have public data members. See the QStyleOption class documentation for details on how to use it.

为方便起见，Qt 提供 QStylePainter class, which combines a QStyle ， QPainter ，和 QWidget 。这使之可能编写

    QStylePainter painter(this);
    ...
    painter.drawPrimitive(QStyle::PE_FrameFocusRect, option);
					

而不是

    QPainter painter(this);
    ...
    style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
					
					

创建自定义样式

You can create a custom look and feel for your application by creating a custom style. There are two approaches to creating a custom style. In the static approach, you either choose an existing QStyle class, subclass it, and reimplement virtual functions to provide the custom behavior, or you create an entire QStyle class from scratch. In the dynamic approach, you modify the behavior of your system style at runtime. The static approach is described below. The dynamic approach is described in QProxyStyle .

The first step in the static approach is to pick one of the styles provided by Qt from which you will build your custom style. Your choice of QStyle class will depend on which style resembles your desired style the most. The most general class that you can use as a base is QCommonStyle (not QStyle ). This is because Qt requires its styles to be QCommonStyle 。

Depending on which parts of the base style you want to change, you must reimplement the functions that are used to draw those parts of the interface. To illustrate this, we will modify the look of the spin box arrows drawn by QWindowsStyle. The arrows are primitive elements that are drawn by the drawPrimitive () function, so we need to reimplement that function. We need the following class declaration:

class CustomStyle : public QProxyStyle
{
    Q_OBJECT
public:
    CustomStyle();
    ~CustomStyle() {}
    void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
                       QPainter *painter, const QWidget *widget) const override;
};
					

要绘制它的向上 向下箭头， QSpinBox 使用 PE_IndicatorSpinUp and PE_IndicatorSpinDown 图元元素。这里是如何重实现 drawPrimitive () 函数以不同方式绘制它们：

void CustomStyle::drawPrimitive(PrimitiveElement element, const QStyleOption *option,
                                QPainter *painter, const QWidget *widget) const
{
    if (element == PE_IndicatorSpinUp || element == PE_IndicatorSpinDown) {
        QPolygon points(3);
        int x = option->rect.x();
        int y = option->rect.y();
        int w = option->rect.width() / 2;
        int h = option->rect.height() / 2;
        x += (option->rect.width() - w) / 2;
        y += (option->rect.height() - h) / 2;
        if (element == PE_IndicatorSpinUp) {
            points[0] = QPoint(x, y + h);
            points[1] = QPoint(x + w, y + h);
            points[2] = QPoint(x + w / 2, y);
        } else { // PE_SpinBoxDown
            points[0] = QPoint(x, y);
            points[1] = QPoint(x + w, y);
            points[2] = QPoint(x + w / 2, y + h);
        }
        if (option->state & State_Enabled) {
            painter->setPen(option->palette.mid().color());
            painter->setBrush(option->palette.buttonText());
        } else {
            painter->setPen(option->palette.buttonText().color());
            painter->setBrush(option->palette.mid());
        }
        painter->drawPolygon(points);
    } else {
    QProxyStyle::drawPrimitive(element, option, painter, widget);
    }
}
					

注意，我们不使用 widget argument, except to pass it on to the QWindowStyle::drawPrimitive() function. As mentioned earlier, the information about what is to be drawn and how it should be drawn is specified by a QStyleOption object, so there is no need to ask the widget.

若需要使用 widget argument to obtain additional information, be careful to ensure that it isn't 0 and that it is of the correct type before using it. For example:

    const QSpinBox *spinBox = qobject_cast<const QSpinBox *>(widget);
    if (spinBox) {
    ...
    }
					

When implementing a custom style, you cannot assume that the widget is a QSpinBox just because the enum value is called PE_IndicatorSpinUp or PE_IndicatorSpinDown .

The documentation for the 样式 example covers this topic in more detail.

警告： Qt 样式表目前不支持自定义 QStyle 子类。计划在某些未来发行中解决此问题。

使用自定义样式

There are several ways of using a custom style in a Qt application. The simplest way is to pass the custom style to the QApplication::setStyle () 静态函数先于创建 QApplication 对象：

#include <QtWidgets>
#include "customstyle.h"
int main(int argc, char *argv[])
{
    QApplication::setStyle(new CustomStyle);
    QApplication app(argc, argv);
    QSpinBox spinBox;
    spinBox.show();
    return app.exec();
}
					

可以调用 QApplication::setStyle () at any time, but by calling it before the constructor, you ensure that the user's preference, set using the -style command-line option, is respected.

You may want to make your custom style available for use in other applications, which may not be yours and hence not available for you to recompile. The Qt Plugin system makes it possible to create styles as plugins. Styles created as plugins are loaded as shared objects at runtime by Qt itself. Please refer to the Qt Plugin documentation for more information on how to go about creating a style plugin.

编译插件并将其放入 Qt plugins/styles directory. We now have a pluggable style that Qt can load automatically. To use your new style with existing applications, simply start the application with the following argument:

./myapplication -style custom
					

The application will use the look and feel from the custom style you implemented.

从右到左桌面

Languages written from right to left (such as Arabic and Hebrew) usually also mirror the whole layout of widgets, and require the light to come from the screen's top-right corner instead of top-left.

If you create a custom style, you should take special care when drawing asymmetric elements to make sure that they also look correct in a mirrored layout. An easy way to test your styles is to run applications with the -reverse 命令行选项或调用 QApplication::setLayoutDirection () 在您的 main() 函数。

Here are some things to keep in mind when making a style work well in a right-to-left environment:

• subControlRect () 和 subElementRect () 按屏幕坐标返回矩形
• QStyleOption::direction indicates in which direction the item should be drawn in
• If a style is not right-to-left aware it will display items as if it were left-to-right
• visualRect (), visualPos ()，和 visualAlignment () are helpful functions that will translate from logical to screen representations.
• alignedRect () will return a logical rect aligned for the current direction

在项视图中的样式

The painting of items in views is performed by a delegate. Qt's default delegate, QStyledItemDelegate , is also used for calculating bounding rectangles of items, and their sub-elements for the various kind of item data roles QStyledItemDelegate supports. See the QStyledItemDelegate class description to find out which datatypes and roles are supported. You can read more about item data roles in 模型/视图编程 .

当 QStyledItemDelegate paints its items, it draws CE_ItemViewItem , and calculates their size with CT_ItemViewItem . Note also that it uses SE_ItemViewItemText to set the size of editors. When implementing a style to customize drawing of item views, you need to check the implementation of QCommonStyle (and any other subclasses from which your style inherits). This way, you find out which and how other style elements are painted, and you can then reimplement the painting of elements that should be drawn differently.

We include a small example where we customize the drawing of item backgrounds.

    switch (element) {
        case (PE_PanelItemViewItem): {
            painter->save();
            QPoint topLeft = option->rect.topLeft();
            QPoint bottomRight = option->rect.topRight();
            QLinearGradient backgroundGradient(topLeft, bottomRight);
            backgroundGradient.setColorAt(0.0, QColor(Qt::yellow).lighter(190));
            backgroundGradient.setColorAt(1.0, Qt::white);
            painter->fillRect(option->rect, QBrush(backgroundGradient));
            painter->restore();
        break;
        }
        default:
            QProxyStyle::drawPrimitive(element, option, painter, widget);
    }
					

图元元素 PE_PanelItemViewItem is responsible for painting the background of items, and is called from QCommonStyle 's implementation of CE_ItemViewItem .

To add support for drawing of new datatypes and item data roles, it is necessary to create a custom delegate. But if you only need to support the datatypes implemented by the default delegate, a custom style does not need an accompanying delegate. The QStyledItemDelegate class description gives more information on custom delegates.

The drawing of item view headers is also done by the style, giving control over size of header items and row and column sizes.

另请参阅 QStyleOption , QStylePainter , 样式范例 , 样式和样式感知 Widget , QStyledItemDelegate ，和 Styling .

成员类型文档编制

enum QStyle:: ComplexControl

This enum describes the available complex controls. Complex controls have different behavior depending upon where the user clicks on them or which keys are pressed.

常量	值	描述
QStyle::CC_SpinBox	0	自旋框，像 QSpinBox .
QStyle::CC_ComboBox	1	组合框，像 QComboBox .
QStyle::CC_ScrollBar	2	滚动条，像 QScrollBar .
QStyle::CC_Slider	3	滑块，像 QSlider .
QStyle::CC_ToolButton	4	工具按钮，像 QToolButton .
QStyle::CC_TitleBar	5	标题栏，像那些使用在 QMdiSubWindow .
QStyle::CC_GroupBox	7	组框，像 QGroupBox .
QStyle::CC_Dial	6	表盘，像 QDial .
QStyle::CC_MdiControls	8	The minimize, close, and normal button in the menu bar for a maximized MDI subwindow.
QStyle::CC_CustomBase	0xf0000000	Base value for custom complex controls. Custom values must be greater than this value.

另请参阅 SubControl and drawComplexControl ().

enum QStyle:: ContentsType

This enum describes the available contents types. These are used to calculate sizes for the contents of various widgets.

常量	值	描述
QStyle::CT_CheckBox	1	复选框，像 QCheckBox .
QStyle::CT_ComboBox	4	组合框，像 QComboBox .
QStyle::CT_HeaderSection	19	头部区间，像 QHeader。
QStyle::CT_LineEdit	14	行编辑，像 QLineEdit .
QStyle::CT_Menu	10	菜单，像 QMenu .
QStyle::CT_MenuBar	9	菜单栏，像 QMenuBar .
QStyle::CT_MenuBarItem	8	菜单栏项，像按钮在 QMenuBar .
QStyle::CT_MenuItem	7	菜单项，像 QMenuItem。
QStyle::CT_ProgressBar	6	进度条，像 QProgressBar .
QStyle::CT_PushButton	0	按钮，像 QPushButton .
QStyle::CT_RadioButton	2	单选按钮，像 QRadioButton .
QStyle::CT_SizeGrip	16	大小握把，像 QSizeGrip .
QStyle::CT_Slider	12	滑块，像 QSlider .
QStyle::CT_ScrollBar	13	滚动条，像 QScrollBar .
QStyle::CT_SpinBox	15	自旋框，像 QSpinBox .
QStyle::CT_Splitter	5	分割器，像 QSplitter .
QStyle::CT_TabBarTab	11	选项卡栏中的选项卡，像 QTabBar .
QStyle::CT_TabWidget	17	选项卡小部件，像 QTabWidget .
QStyle::CT_ToolButton	3	工具按钮，像 QToolButton .
QStyle::CT_GroupBox	20	组框，像 QGroupBox .
QStyle::CT_ItemViewItem	22	在项视图内的项。
QStyle::CT_CustomBase	0xf0000000	Base value for custom contents types. Custom values must be greater than this value.
QStyle::CT_MdiControls	21	The minimize, normal, and close button in the menu bar for a maximized MDI subwindow.

另请参阅 sizeFromContents ().

enum QStyle:: ControlElement

此枚举表示控件元素。控件元素是履行某些动作 (或向用户显示信息) 的 Widget 的一部分。

常量	值	描述
QStyle::CE_PushButton	0	A QPushButton 、绘制 CE_PushButtonBevel、CE_PushButtonLabel 及 PE_FrameFocusRect .
QStyle::CE_PushButtonBevel	1	斜角和默认指示器对于 QPushButton .
QStyle::CE_PushButtonLabel	2	标签 (具有文本或像素图的图标) 对于 QPushButton .
QStyle::CE_DockWidgetTitle	30	停放窗口标题。
QStyle::CE_Splitter	28	分割器手柄；另请参阅 QSplitter .
QStyle::CE_CheckBox	3	A QCheckBox ，绘制 PE_IndicatorCheckBox ，CE_CheckBoxLabel 和 PE_FrameFocusRect .
QStyle::CE_CheckBoxLabel	4	标签 (文本或像素图) 对于 QCheckBox .
QStyle::CE_RadioButton	5	A QRadioButton ，绘制 PE_IndicatorRadioButton ，CE_RadioButtonLabel 和 PE_FrameFocusRect .
QStyle::CE_RadioButtonLabel	6	标签 (文本或像素图) 对于 QRadioButton .
QStyle::CE_TabBarTab	7	选项卡和标签在 QTabBar .
QStyle::CE_TabBarTabShape	8	选项卡栏内的选项卡形状。
QStyle::CE_TabBarTabLabel	9	选项卡内标签。
QStyle::CE_ProgressBar	10	A QProgressBar 、绘制 CE_ProgressBarGroove、CE_ProgressBarContents 及 CE_ProgressBarLabel。
QStyle::CE_ProgressBarGroove	11	The groove where the progress indicator is drawn in a QProgressBar .
QStyle::CE_ProgressBarContents	12	进度指示器对于 QProgressBar .
QStyle::CE_ProgressBarLabel	13	文本标签对于 QProgressBar .
QStyle::CE_ToolButtonLabel	22	工具按钮标签。
QStyle::CE_MenuBarItem	20	菜单项在 QMenuBar .
QStyle::CE_MenuBarEmptyArea	21	空区域对于 QMenuBar .
QStyle::CE_MenuItem	14	菜单项在 QMenu .
QStyle::CE_MenuScroller	15	Scrolling areas in a QMenu when the style supports scrolling.
QStyle::CE_MenuTearoff	18	A menu item representing the tear off section of a QMenu .
QStyle::CE_MenuEmptyArea	19	The area in a menu without menu items.
QStyle::CE_MenuHMargin	17	The horizontal extra space on the left/right of a menu.
QStyle::CE_MenuVMargin	16	The vertical extra space on the top/bottom of a menu.
QStyle::CE_ToolBoxTab	26	The toolbox's tab and label within a QToolBox .
QStyle::CE_SizeGrip	27	窗口重置大小手柄；另请参阅 QSizeGrip .
QStyle::CE_Header	23	Header (头)。
QStyle::CE_HeaderSection	24	Header (头部) 区间。
QStyle::CE_HeaderLabel	25	头部标签。
QStyle::CE_ScrollBarAddLine	31	Scroll bar line increase indicator. (i.e., scroll down); see also QScrollBar .
QStyle::CE_ScrollBarSubLine	32	Scroll bar line decrease indicator (i.e., scroll up).
QStyle::CE_ScrollBarAddPage	33	Scolllbar page increase indicator (i.e., page down).
QStyle::CE_ScrollBarSubPage	34	Scroll bar page decrease indicator (i.e., page up).
QStyle::CE_ScrollBarSlider	35	滚动条滑块。
QStyle::CE_ScrollBarFirst	36	Scroll bar first line indicator (i.e., home).
QStyle::CE_ScrollBarLast	37	Scroll bar last line indicator (i.e., end).
QStyle::CE_RubberBand	29	Rubber band used in for example an icon view.
QStyle::CE_FocusFrame	38	Focus frame that is style controlled.
QStyle::CE_ItemViewItem	45	在项视图内的项。
QStyle::CE_CustomBase	0xf0000000	Base value for custom control elements; custom values must be greater than this value.
QStyle::CE_ComboBoxLabel	39	标签对于不可编辑 QComboBox .
QStyle::CE_ToolBar	40	工具栏像 QToolBar .
QStyle::CE_ToolBoxTabShape	41	工具框的选项卡形状。
QStyle::CE_ToolBoxTabLabel	42	工具框选项卡标签。
QStyle::CE_HeaderEmptyArea	43	The area of a header view where there are no header sections.
QStyle::CE_ShapedFrame	46	The frame with the shape specified in the QStyleOptionFrame ；见 QFrame .

另请参阅 drawControl ().

enum QStyle:: PixelMetric

This enum describes the various available pixel metrics. A pixel metric is a style dependent size represented by a single pixel value.

常量	值	描述
QStyle::PM_ButtonMargin	0	Amount of whitespace between push button labels and the frame.
QStyle::PM_DockWidgetTitleBarButtonMargin	76	Amount of whitespace between dock widget's title bar button labels and the frame.
QStyle::PM_ButtonDefaultIndicator	1	Width of the default-button indicator frame.
QStyle::PM_MenuButtonIndicator	2	Width of the menu button indicator proportional to the widget height.
QStyle::PM_ButtonShiftHorizontal	3	Horizontal contents shift of a button when the button is down.
QStyle::PM_ButtonShiftVertical	4	Vertical contents shift of a button when the button is down.
QStyle::PM_DefaultFrameWidth	5	默认框架宽度 (通常为 2)。
QStyle::PM_SpinBoxFrameWidth	6	Frame width of a spin box, defaults to PM_DefaultFrameWidth.
QStyle::PM_ComboBoxFrameWidth	7	Frame width of a combo box, defaults to PM_DefaultFrameWidth.
QStyle::PM_MDIFrameWidth	PM_MdiSubWindowFrameWidth	Obsolete. Use PM_MdiSubWindowFrameWidth instead.
QStyle::PM_MdiSubWindowFrameWidth	44	Frame width of an MDI window.
QStyle::PM_MDIMinimizedWidth	PM_MdiSubWindowMinimizedWidth	Obsolete. Use PM_MdiSubWindowMinimizedWidth instead.
QStyle::PM_MdiSubWindowMinimizedWidth	45	Width of a minimized MDI window.
QStyle::PM_LayoutLeftMargin	78	默认 left margin 对于 QLayout .
QStyle::PM_LayoutTopMargin	79	默认 top margin 对于 QLayout .
QStyle::PM_LayoutRightMargin	80	默认 right margin 对于 QLayout .
QStyle::PM_LayoutBottomMargin	81	默认 bottom margin 对于 QLayout .
QStyle::PM_LayoutHorizontalSpacing	82	默认 horizontal spacing 对于 QLayout .
QStyle::PM_LayoutVerticalSpacing	83	默认 vertical spacing 对于 QLayout .
QStyle::PM_MaximumDragDistance	8	The maximum allowed distance between the mouse and a scrollbar when dragging. Exceeding the specified distance will cause the slider to jump back to the original position; a value of -1 disables this behavior.
QStyle::PM_ScrollBarExtent	9	Width of a vertical scroll bar and the height of a horizontal scroll bar.
QStyle::PM_ScrollBarSliderMin	10	The minimum height of a vertical scroll bar's slider and the minimum width of a horizontal scroll bar's slider.
QStyle::PM_SliderThickness	11	Total slider thickness.
QStyle::PM_SliderControlThickness	12	Thickness of the slider handle.
QStyle::PM_SliderLength	13	滑块的长度。
QStyle::PM_SliderTickmarkOffset	14	The offset between the tickmarks and the slider.
QStyle::PM_SliderSpaceAvailable	15	The available space for the slider to move.
QStyle::PM_DockWidgetSeparatorExtent	16	Width of a separator in a horizontal dock window and the height of a separator in a vertical dock window.
QStyle::PM_DockWidgetHandleExtent	17	Width of the handle in a horizontal dock window and the height of the handle in a vertical dock window.
QStyle::PM_DockWidgetFrameWidth	18	Frame width of a dock window.
QStyle::PM_DockWidgetTitleMargin	73	Margin of the dock window title.
QStyle::PM_MenuBarPanelWidth	33	Frame width of a menu bar, defaults to PM_DefaultFrameWidth.
QStyle::PM_MenuBarItemSpacing	34	Spacing between menu bar items.
QStyle::PM_MenuBarHMargin	36	Spacing between menu bar items and left/right of bar.
QStyle::PM_MenuBarVMargin	35	Spacing between menu bar items and top/bottom of bar.
QStyle::PM_ToolBarFrameWidth	52	Width of the frame around toolbars.
QStyle::PM_ToolBarHandleExtent	53	Width of a toolbar handle in a horizontal toolbar and the height of the handle in a vertical toolbar.
QStyle::PM_ToolBarItemMargin	55	Spacing between the toolbar frame and the items.
QStyle::PM_ToolBarItemSpacing	54	Spacing between toolbar items.
QStyle::PM_ToolBarSeparatorExtent	56	Width of a toolbar separator in a horizontal toolbar and the height of a separator in a vertical toolbar.
QStyle::PM_ToolBarExtensionExtent	57	Width of a toolbar extension button in a horizontal toolbar and the height of the button in a vertical toolbar.
QStyle::PM_TabBarTabOverlap	19	Number of pixels the tabs should overlap. (Currently only used in styles, not inside of QTabBar )
QStyle::PM_TabBarTabHSpace	20	Extra space added to the tab width.
QStyle::PM_TabBarTabVSpace	21	Extra space added to the tab height.
QStyle::PM_TabBarBaseHeight	22	Height of the area between the tab bar and the tab pages.
QStyle::PM_TabBarBaseOverlap	23	Number of pixels the tab bar overlaps the tab bar base.
QStyle::PM_TabBarScrollButtonWidth	51
QStyle::PM_TabBarTabShiftHorizontal	49	Horizontal pixel shift when a tab is selected.
QStyle::PM_TabBarTabShiftVertical	50	Vertical pixel shift when a tab is selected.
QStyle::PM_ProgressBarChunkWidth	24	Width of a chunk in a progress bar indicator.
QStyle::PM_SplitterWidth	25	分割器的宽度。
QStyle::PM_TitleBarHeight	26	Height of the title bar.
QStyle::PM_IndicatorWidth	37	Width of a check box indicator.
QStyle::PM_IndicatorHeight	38	Height of a checkbox indicator.
QStyle::PM_ExclusiveIndicatorWidth	39	Width of a radio button indicator.
QStyle::PM_ExclusiveIndicatorHeight	40	Height of a radio button indicator.
QStyle::PM_MenuPanelWidth	30	Border width (applied on all sides) for a QMenu .
QStyle::PM_MenuHMargin	28	Additional border (used on left and right) for a QMenu .
QStyle::PM_MenuVMargin	29	Additional border (used for bottom and top) for a QMenu .
QStyle::PM_MenuScrollerHeight	27	Height of the scroller area in a QMenu .
QStyle::PM_MenuTearoffHeight	31	Height of a tear off area in a QMenu .
QStyle::PM_MenuDesktopFrameWidth	32	The frame width for the menu on the desktop.
QStyle::PM_HeaderMarkSize	47	The size of the sort indicator in a header.
QStyle::PM_HeaderGripMargin	48	The size of the resize grip in a header.
QStyle::PM_HeaderMargin	46	The size of the margin between the sort indicator and the text.
QStyle::PM_SpinBoxSliderHeight	58	The height of the optional spin box slider.
QStyle::PM_ToolBarIconSize	62	默认工具栏图标尺寸
QStyle::PM_SmallIconSize	65	默认小图标尺寸
QStyle::PM_LargeIconSize	66	默认大图标尺寸
QStyle::PM_FocusFrameHMargin	68	Horizontal margin that the focus frame will outset the widget by.
QStyle::PM_FocusFrameVMargin	67	Vertical margin that the focus frame will outset the widget by.
QStyle::PM_IconViewIconSize	64	The default size for icons in an icon view.
QStyle::PM_ListViewIconSize	63	The default size for icons in a list view.
QStyle::PM_ToolTipLabelFrameWidth	69	The frame width for a tool tip label.
QStyle::PM_CheckBoxLabelSpacing	70	The spacing between a check box indicator and its label.
QStyle::PM_RadioButtonLabelSpacing	77	The spacing between a radio button indicator and its label.
QStyle::PM_TabBarIconSize	71	The default icon size for a tab bar.
QStyle::PM_SizeGripSize	72	大小握把的大小。
QStyle::PM_MessageBoxIconSize	74	The size of the standard icons in a message box
QStyle::PM_ButtonIconSize	75	The default size of button icons
QStyle::PM_TextCursorWidth	85	The width of the cursor in a line edit or text edit
QStyle::PM_TabBar_ScrollButtonOverlap	84	The distance between the left and right buttons in a tab bar.
QStyle::PM_TabCloseIndicatorWidth	86	The default width of a close button on a tab in a tab bar.
QStyle::PM_TabCloseIndicatorHeight	87	The default height of a close button on a tab in a tab bar.
QStyle::PM_ScrollView_ScrollBarSpacing	88	Distance between frame and scrollbar with SH_ScrollView_FrameOnlyAroundContents set.
QStyle::PM_ScrollView_ScrollBarOverlap	89	Overlap between scroll bars and scroll content
QStyle::PM_SubMenuOverlap	90	The horizontal overlap between a submenu and its parent.
QStyle::PM_TreeViewIndentation	91	The indentation of items in a tree view. This enum value has been introduced in Qt 5.4.
QStyle::PM_HeaderDefaultSectionSizeHorizontal	92	The default size of sections in a horizontal header. This enum value has been introduced in Qt 5.5.
QStyle::PM_HeaderDefaultSectionSizeVertical	93	The default size of sections in a vertical header. This enum value has been introduced in Qt 5.5.
QStyle::PM_TitleBarButtonIconSize	94	The size of button icons on a title bar. This enum value has been introduced in Qt 5.8.
QStyle::PM_TitleBarButtonSize	95	The size of buttons on a title bar. This enum value has been introduced in Qt 5.8.
QStyle::PM_CustomBase	0xf0000000	Base value for custom pixel metrics. Custom values must be greater than this value.

以下值已过时：

常量	值	描述
QStyle::PM_DefaultTopLevelMargin	59	Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead.
QStyle::PM_DefaultChildMargin	60	Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead.
QStyle::PM_DefaultLayoutSpacing	61	Use PM_LayoutHorizontalSpacing and PM_LayoutVerticalSpacing instead.

另请参阅 pixelMetric ().

enum QStyle:: PrimitiveElement

This enum describes the various primitive elements. A primitive element is a common GUI element, such as a checkbox indicator or button bevel.

常量	值	描述
QStyle::PE_FrameStatusBar	7	Obsolete. Use PE_FrameStatusBarItem instead.
QStyle::PE_PanelButtonCommand	13	Button used to initiate an action, for example, a QPushButton .
QStyle::PE_FrameDefaultButton	1	This frame around a default button, e.g. in a dialog.
QStyle::PE_PanelButtonBevel	14	Generic panel with a button bevel.
QStyle::PE_PanelButtonTool	15	Panel for a Tool button, used with QToolButton .
QStyle::PE_PanelLineEdit	18	Panel for a QLineEdit .
QStyle::PE_IndicatorButtonDropDown	24	Indicator for a drop down button, for example, a tool button that displays a menu.
QStyle::PE_FrameFocusRect	3	一般聚焦指示器。
QStyle::PE_IndicatorArrowUp	22	一般向上箭头。
QStyle::PE_IndicatorArrowDown	19	一般向下箭头。
QStyle::PE_IndicatorArrowRight	21	一般向右箭头。
QStyle::PE_IndicatorArrowLeft	20	一般向左箭头。
QStyle::PE_IndicatorSpinUp	35	Up symbol for a spin widget, for example a QSpinBox .
QStyle::PE_IndicatorSpinDown	32	Down symbol for a spin widget.
QStyle::PE_IndicatorSpinPlus	34	Increase symbol for a spin widget.
QStyle::PE_IndicatorSpinMinus	33	Decrease symbol for a spin widget.
QStyle::PE_IndicatorItemViewItemCheck	PE_IndicatorViewItemCheck	On/off indicator for a view item.
QStyle::PE_IndicatorCheckBox	26	On/off indicator, for example, a QCheckBox .
QStyle::PE_IndicatorRadioButton	31	Exclusive on/off indicator, for example, a QRadioButton .
QStyle::PE_IndicatorDockWidgetResizeHandle	27	Resize handle for dock windows.
QStyle::PE_Frame	0	Generic frame
QStyle::PE_FrameMenu	6	Frame for popup windows/menus; see also QMenu .
QStyle::PE_PanelMenuBar	16	Panel for menu bars.
QStyle::PE_PanelScrollAreaCorner	40	Panel at the bottom-right (or bottom-left) corner of a scroll area.
QStyle::PE_FrameDockWidget	2	Panel frame for dock windows and toolbars.
QStyle::PE_FrameTabWidget	8	Frame for tab widgets.
QStyle::PE_FrameLineEdit	5	Panel frame for line edits.
QStyle::PE_FrameGroupBox	4	Panel frame around group boxes.
QStyle::PE_FrameButtonBevel	10	Panel frame for a button bevel.
QStyle::PE_FrameButtonTool	11	Panel frame for a tool button.
QStyle::PE_IndicatorHeaderArrow	28	Arrow used to indicate sorting on a list or table header.
QStyle::PE_FrameStatusBarItem	PE_FrameStatusBar	Frame for an item of a status bar; see also QStatusBar .
QStyle::PE_FrameWindow	9	Frame around a MDI window or a docking window.
QStyle::PE_IndicatorMenuCheckMark	29	Check mark used in a menu.
QStyle::PE_IndicatorProgressChunk	30	Section of a progress bar indicator; see also QProgressBar .
QStyle::PE_IndicatorBranch	23	Lines used to represent the branch of a tree in a tree view.
QStyle::PE_IndicatorToolBarHandle	36	The handle of a toolbar.
QStyle::PE_IndicatorToolBarSeparator	37	The separator in a toolbar.
QStyle::PE_PanelToolBar	17	The panel for a toolbar.
QStyle::PE_PanelTipLabel	38	The panel for a tip label.
QStyle::PE_FrameTabBarBase	12	The frame that is drawn for a tab bar, ususally drawn for a tab bar that isn't part of a tab widget.
QStyle::PE_IndicatorTabTear	39	Deprecated. Use PE_IndicatorTabTearLeft instead.
QStyle::PE_IndicatorTabTearLeft	PE_IndicatorTabTear	An indicator that a tab is partially scrolled out on the left side of the visible tab bar when there are many tabs.
QStyle::PE_IndicatorTabTearRight	49	An indicator that a tab is partially scrolled out on the right side of the visible tab bar when there are many tabs.
QStyle::PE_IndicatorColumnViewArrow	42	An arrow in a QColumnView .
QStyle::PE_Widget	41	A plain QWidget .
QStyle::PE_CustomBase	0xf000000	Base value for custom primitive elements. All values above this are reserved for custom use. Custom values must be greater than this value.
QStyle::PE_IndicatorItemViewItemDrop	43	An indicator that is drawn to show where an item in an item view is about to be dropped during a drag-and-drop operation in an item view.
QStyle::PE_PanelItemViewItem	44	The background for an item in an item view.
QStyle::PE_PanelItemViewRow	45	The background of a row in an item view.
QStyle::PE_PanelStatusBar	46	The panel for a status bar.
QStyle::PE_IndicatorTabClose	47	The close button on a tab bar.
QStyle::PE_PanelMenu	48	The panel for a menu.

另请参阅 drawPrimitive ().

enum QStyle:: RequestSoftwareInputPanel

This enum describes under what circumstances a software input panel will be requested by input capable widgets.

常量	值	描述
QStyle::RSIP_OnMouseClickAndAlreadyFocused	0	Requests an input panel if the user clicks on the widget, but only if it is already focused.
QStyle::RSIP_OnMouseClick	1	Requests an input panel if the user clicks on the widget.

另请参阅 QInputMethod .

enum QStyle:: StandardPixmap

This enum describes the available standard pixmaps. A standard pixmap is a pixmap that can follow some existing GUI style or guideline.

常量	值	描述
QStyle::SP_TitleBarMinButton	1	Minimize button on title bars (e.g., in QMdiSubWindow ).
QStyle::SP_TitleBarMenuButton	0	Menu button on a title bar.
QStyle::SP_TitleBarMaxButton	2	Maximize button on title bars.
QStyle::SP_TitleBarCloseButton	3	Close button on title bars.
QStyle::SP_TitleBarNormalButton	4	Normal (restore) button on title bars.
QStyle::SP_TitleBarShadeButton	5	Shade button on title bars.
QStyle::SP_TitleBarUnshadeButton	6	Unshade button on title bars.
QStyle::SP_TitleBarContextHelpButton	7	The Context help button on title bars.
QStyle::SP_MessageBoxInformation	9	The "information" icon.
QStyle::SP_MessageBoxWarning	10	The "warning" icon.
QStyle::SP_MessageBoxCritical	11	The "critical" icon.
QStyle::SP_MessageBoxQuestion	12	The "question" icon.
QStyle::SP_DesktopIcon	13	The "desktop" icon.
QStyle::SP_TrashIcon	14	The "trash" icon.
QStyle::SP_ComputerIcon	15	The "My computer" icon.
QStyle::SP_DriveFDIcon	16	The floppy icon.
QStyle::SP_DriveHDIcon	17	The harddrive icon.
QStyle::SP_DriveCDIcon	18	The CD icon.
QStyle::SP_DriveDVDIcon	19	The DVD icon.
QStyle::SP_DriveNetIcon	20	The network icon.
QStyle::SP_DirHomeIcon	56	The home directory icon.
QStyle::SP_DirOpenIcon	21	The open directory icon.
QStyle::SP_DirClosedIcon	22	The closed directory icon.
QStyle::SP_DirIcon	38	The directory icon.
QStyle::SP_DirLinkIcon	23	The link to directory icon.
QStyle::SP_DirLinkOpenIcon	24	The link to open directory icon.
QStyle::SP_FileIcon	25	The file icon.
QStyle::SP_FileLinkIcon	26	The link to file icon.
QStyle::SP_FileDialogStart	29	The "start" icon in a file dialog.
QStyle::SP_FileDialogEnd	30	The "end" icon in a file dialog.
QStyle::SP_FileDialogToParent	31	The "parent directory" icon in a file dialog.
QStyle::SP_FileDialogNewFolder	32	The "create new folder" icon in a file dialog.
QStyle::SP_FileDialogDetailedView	33	The detailed view icon in a file dialog.
QStyle::SP_FileDialogInfoView	34	The file info icon in a file dialog.
QStyle::SP_FileDialogContentsView	35	The contents view icon in a file dialog.
QStyle::SP_FileDialogListView	36	The list view icon in a file dialog.
QStyle::SP_FileDialogBack	37	The back arrow in a file dialog.
QStyle::SP_DockWidgetCloseButton	8	Close button on dock windows (see also QDockWidget ).
QStyle::SP_ToolBarHorizontalExtensionButton	27	Extension button for horizontal toolbars.
QStyle::SP_ToolBarVerticalExtensionButton	28	Extension button for vertical toolbars.
QStyle::SP_DialogOkButton	39	Icon for a standard OK button in a QDialogButtonBox .
QStyle::SP_DialogCancelButton	40	Icon for a standard Cancel button in a QDialogButtonBox .
QStyle::SP_DialogHelpButton	41	Icon for a standard Help button in a QDialogButtonBox .
QStyle::SP_DialogOpenButton	42	Icon for a standard Open button in a QDialogButtonBox .
QStyle::SP_DialogSaveButton	43	Icon for a standard Save button in a QDialogButtonBox .
QStyle::SP_DialogCloseButton	44	Icon for a standard Close button in a QDialogButtonBox .
QStyle::SP_DialogApplyButton	45	Icon for a standard Apply button in a QDialogButtonBox .
QStyle::SP_DialogResetButton	46	Icon for a standard Reset button in a QDialogButtonBox .
QStyle::SP_DialogDiscardButton	47	Icon for a standard Discard button in a QDialogButtonBox .
QStyle::SP_DialogYesButton	48	Icon for a standard Yes button in a QDialogButtonBox .
QStyle::SP_DialogNoButton	49	Icon for a standard No button in a QDialogButtonBox .
QStyle::SP_ArrowUp	50	Icon arrow pointing up.
QStyle::SP_ArrowDown	51	Icon arrow pointing down.
QStyle::SP_ArrowLeft	52	Icon arrow pointing left.
QStyle::SP_ArrowRight	53	Icon arrow pointing right.
QStyle::SP_ArrowBack	54	Equivalent to SP_ArrowLeft when the current layout direction is Qt::LeftToRight , otherwise SP_ArrowRight.
QStyle::SP_ArrowForward	55	Equivalent to SP_ArrowRight when the current layout direction is Qt::LeftToRight , otherwise SP_ArrowLeft.
QStyle::SP_CommandLink	57	Icon used to indicate a Vista style command link glyph.
QStyle::SP_VistaShield	58	Icon used to indicate UAC prompts on Windows Vista. This will return a null pixmap or icon on all other platforms.
QStyle::SP_BrowserReload	59	Icon indicating that the current page should be reloaded.
QStyle::SP_BrowserStop	60	Icon indicating that the page loading should stop.
QStyle::SP_MediaPlay	61	Icon indicating that media should begin playback.
QStyle::SP_MediaStop	62	Icon indicating that media should stop playback.
QStyle::SP_MediaPause	63	Icon indicating that media should pause playback.
QStyle::SP_MediaSkipForward	64	Icon indicating that media should skip forward.
QStyle::SP_MediaSkipBackward	65	Icon indicating that media should skip backward.
QStyle::SP_MediaSeekForward	66	Icon indicating that media should seek forward.
QStyle::SP_MediaSeekBackward	67	Icon indicating that media should seek backward.
QStyle::SP_MediaVolume	68	Icon indicating a volume control.
QStyle::SP_MediaVolumeMuted	69	Icon indicating a muted volume control.
QStyle::SP_LineEditClearButton	70	Icon for a standard clear button in a QLineEdit . This enum value was added in Qt 5.2.
QStyle::SP_CustomBase	0xf0000000	Base value for custom standard pixmaps; custom values must be greater than this value.

另请参阅 standardIcon ().

enum QStyle:: StateFlag
flags QStyle:: State

This enum describes flags that are used when drawing primitive elements.

Note that not all primitives use all of these flags, and that the flags may mean different things to different items.

常量	值	描述
QStyle::State_None	0x00000000	Indicates that the widget does not have a state.
QStyle::State_Active	0x00010000	Indicates that the widget is active.
QStyle::State_AutoRaise	0x00001000	Used to indicate if auto-raise appearance should be used on a tool button.
QStyle::State_Children	0x00080000	Used to indicate if an item view branch has children.
QStyle::State_DownArrow	0x00000040	Used to indicate if a down arrow should be visible on the widget.
QStyle::State_Editing	0x00400000	Used to indicate if an editor is opened on the widget.
QStyle::State_Enabled	0x00000001	Used to indicate if the widget is enabled.
QStyle::State_HasEditFocus	0x01000000	Used to indicate if the widget currently has edit focus.
QStyle::State_HasFocus	0x00000100	Used to indicate if the widget has focus.
QStyle::State_Horizontal	0x00000080	Used to indicate if the widget is laid out horizontally, for example. a tool bar.
QStyle::State_KeyboardFocusChange	0x00800000	Used to indicate if the focus was changed with the keyboard, e.g., tab, backtab or shortcut.
QStyle::State_MouseOver	0x00002000	Used to indicate if the widget is under the mouse.
QStyle::State_NoChange	0x00000010	Used to indicate a tri-state checkbox.
QStyle::State_Off	0x00000008	Used to indicate if the widget is not checked.
QStyle::State_On	0x00000020	Used to indicate if the widget is checked.
QStyle::State_Raised	0x00000002	Used to indicate if a button is raised.
QStyle::State_ReadOnly	0x02000000	Used to indicate if a widget is read-only.
QStyle::State_Selected	0x00008000	Used to indicate if a widget is selected.
QStyle::State_Item	0x00100000	Used by item views to indicate if a horizontal branch should be drawn.
QStyle::State_Open	0x00040000	Used by item views to indicate if the tree branch is open.
QStyle::State_Sibling	0x00200000	Used by item views to indicate if a vertical line needs to be drawn (for siblings).
QStyle::State_Sunken	0x00000004	Used to indicate if the widget is sunken or pressed.
QStyle::State_UpArrow	0x00004000	Used to indicate if an up arrow should be visible on the widget.
QStyle::State_Mini	0x08000000	Used to indicate a mini style Mac widget or button.
QStyle::State_Small	0x04000000	Used to indicate a small style Mac widget or button.

State 类型是 typedef 对于 QFlags <StateFlag>. It stores an OR combination of StateFlag values.

另请参阅 drawPrimitive ().

enum QStyle:: StyleHint

此枚举描述可用样式提示。样式提示是一般外观和/或感觉提示。

常量	值	描述
QStyle::SH_EtchDisabledText	0	禁用文本被蚀刻如同在 Windows。
QStyle::SH_DitherDisabledText	1	禁用文本抖动如同在 Motif。
QStyle::SH_ScrollBar_ContextMenu	62	滚动条是否拥有上下文菜单。
QStyle::SH_ScrollBar_MiddleClickAbsolutePosition	2	布尔值。若为 true，在滚动条上点击中键导致滑块跳转到该位置。若为 false，忽略中间点击。
QStyle::SH_ScrollBar_LeftClickAbsolutePosition	39	布尔值。若为 true，在滚动条上点击左键导致滑块跳转到该位置。若为 false，点击左键对每控件将做适当举动。
QStyle::SH_ScrollBar_ScrollWhenPointerLeavesControl	3	布尔值。若 true，当点击滚动条 SubControl ，按下鼠标按钮且移到指针超出 SubControl ，滚动条继续卷动。若为 false，滚动条停止卷动当指针离开 SubControl .
QStyle::SH_ScrollBar_RollBetweenButtons	63	布尔值。若 true，当点击滚动条按钮 ( SC_ScrollBarAddLine or SC_ScrollBarSubLine ) 和拖拽到相反按钮 (卷动) 将按下新按钮并释放旧按钮。当为 false 时，释放原始按钮且什么都不发生 (就像按钮)。
QStyle::SH_TabBar_Alignment	5	选项卡的对齐方式在 QTabWidget 。可能的值是 Qt::AlignLeft , Qt::AlignCenter and Qt::AlignRight .
QStyle::SH_Header_ArrowAlignment	6	The placement of the sorting indicator may appear in list or table headers. Possible values are Qt::Alignment values (that is, an OR combination of Qt::AlignmentFlag 标志)。
QStyle::SH_Slider_SnapToValue	7	Sliders snap to values while moving, as they do on Windows.
QStyle::SH_Slider_SloppyKeyEvents	8	Key presses handled in a sloppy manner, i.e., left on a vertical slider subtracts a line.
QStyle::SH_ProgressDialog_CenterCancelButton	9	Center button on progress dialogs, otherwise right aligned.
QStyle::SH_ProgressDialog_TextLabelAlignment	10	The alignment for text labels in progress dialogs; Qt::AlignCenter 在 Windows， Qt::AlignVCenter 否则。
QStyle::SH_PrintDialog_RightAlignButtons	11	Right align buttons in the print dialog, as done on Windows.
QStyle::SH_MainWindow_SpaceBelowMenuBar	12	One or two pixel space between the menu bar and the dockarea, as done on Windows.
QStyle::SH_FontDialog_SelectAssociatedText	13	Select the text in the line edit, or when selecting an item from the listbox, or when the line edit receives focus, as done on Windows.
QStyle::SH_Menu_KeyboardSearch	66	Typing causes a menu to be search for relevant items, otherwise only mnemnonic is considered.
QStyle::SH_Menu_AllowActiveAndDisabled	14	允许禁用的菜单项是活动的。
QStyle::SH_Menu_SpaceActivatesItem	15	Pressing the space bar activates the item, as done on Motif.
QStyle::SH_Menu_SubMenuPopupDelay	16	The number of milliseconds to wait before opening a submenu (256 on Windows, 96 on Motif).
QStyle::SH_Menu_Scrollable	30	弹出菜单是否必须支持卷动。
QStyle::SH_Menu_SloppySubMenus	33	Whether popup menus must support the user moving the mouse cursor to a submenu while crossing other items of the menu. This is supported on most modern desktop platforms.
QStyle::SH_Menu_SubMenuUniDirection	106	Since Qt 5.5. If the cursor has to move towards the submenu (like it is on macOS ), or if the cursor can move in any direction as long as it reaches the submenu before the sloppy timeout.
QStyle::SH_Menu_SubMenuUniDirectionFailCount	107	Since Qt 5.5. When SH_Menu_SubMenuUniDirection is defined this enum defines the number of failed mouse moves before the sloppy submenu is discarded. This can be used to control the "strictness" of the uni direction algorithm.
QStyle::SH_Menu_SubMenuSloppySelectOtherActions	108	Since Qt 5.5. Should other action items be selected when the mouse moves towards a sloppy submenu.
QStyle::SH_Menu_SubMenuSloppyCloseTimeout	109	Since Qt 5.5. The timeout used to close sloppy submenus.
QStyle::SH_Menu_SubMenuResetWhenReenteringParent	110	Since Qt 5.5. When entering parent from child submenu, should the sloppy state be reset, effectively closing the child and making the current submenu active.
QStyle::SH_Menu_SubMenuDontStartSloppyOnLeave	111	Since Qt 5.5. Do not start sloppy timers when the mouse leaves a sub-menu.
QStyle::SH_ScrollView_FrameOnlyAroundContents	17	Whether scrollviews draw their frame only around contents (like Motif), or around contents, scroll bars and corner widgets (like Windows).
QStyle::SH_MenuBar_AltKeyNavigation	18	Menu bars items are navigable by pressing Alt, followed by using the arrow keys to select the desired item.
QStyle::SH_ComboBox_ListMouseTracking	19	Mouse tracking in combobox drop-down lists.
QStyle::SH_Menu_MouseTracking	20	Mouse tracking in popup menus.
QStyle::SH_MenuBar_MouseTracking	21	Mouse tracking in menu bars.
QStyle::SH_Menu_FillScreenWithScroll	45	Whether scrolling popups should fill the screen as they are scrolled.
QStyle::SH_Menu_SelectionWrap	74	Whether popups should allow the selections to wrap, that is when selection should the next item be the first item.
QStyle::SH_ItemView_ChangeHighlightOnFocus	22	Gray out selected items when losing focus.
QStyle::SH_Widget_ShareActivation	23	Turn on sharing activation with floating modeless dialogs.
QStyle::SH_TabBar_SelectMouseType	4	Which type of mouse event should cause a tab to be selected.
QStyle::SH_ListViewExpand_SelectMouseType	40	Which type of mouse event should cause a list view expansion to be selected.
QStyle::SH_TabBar_PreferNoArrows	38	Whether a tab bar should suggest a size to prevent scoll arrows.
QStyle::SH_ComboBox_Popup	25	Allows popups as a combobox drop-down menu.
QStyle::SH_Workspace_FillSpaceOnMaximize	24	The workspace should maximize the client area.
QStyle::SH_TitleBar_NoBorder	26	标题栏没有边框。
QStyle::SH_ScrollBar_StopMouseOverSlider	SH_Slider_StopMouseOverSlider	Obsolete. Use SH_Slider_StopMouseOverSlider instead.
QStyle::SH_Slider_StopMouseOverSlider	27	Stops auto-repeat when the slider reaches the mouse position.
QStyle::SH_BlinkCursorWhenTextSelected	28	Whether cursor should blink when text is selected.
QStyle::SH_RichText_FullWidthSelection	29	Whether richtext selections should extend to the full width of the document.
QStyle::SH_GroupBox_TextLabelVerticalAlignment	31	How to vertically align a group box's text label.
QStyle::SH_GroupBox_TextLabelColor	32	How to paint a group box's text label.
QStyle::SH_DialogButtons_DefaultButton	36	Which button gets the default status in a dialog's button widget.
QStyle::SH_ToolBox_SelectedPageTitleBold	37	Boldness of the selected page title in a QToolBox .
QStyle::SH_LineEdit_PasswordCharacter	35	The Unicode character to be used for passwords.
QStyle::SH_LineEdit_PasswordMaskDelay	104	Determines the delay before visible character is masked with password character, in milliseconds. This enum value was added in Qt 5.4.
QStyle::SH_Table_GridLineColor	34	The RGB value of the grid for a table.
QStyle::SH_UnderlineShortcut	41	Whether shortcuts are underlined.
QStyle::SH_SpellCheckUnderlineStyle	72	Obsolete. Use SpellCheckUnderlineStyle hint in QPlatformTheme instead.
QStyle::SH_SpinBox_AnimateButton	42	Animate a click when up or down is pressed in a spin box.
QStyle::SH_SpinBox_KeyPressAutoRepeatRate	43	Auto-repeat interval for spinbox key presses.
QStyle::SH_SpinBox_ClickAutoRepeatRate	44	Auto-repeat interval for spinbox mouse clicks.
QStyle::SH_SpinBox_ClickAutoRepeatThreshold	84	Auto-repeat threshold for spinbox mouse clicks.
QStyle::SH_ToolTipLabel_Opacity	46	An integer indicating the opacity for the tip label, 0 is completely transparent, 255 is completely opaque.
QStyle::SH_DrawMenuBarSeparator	47	Indicates whether or not the menu bar draws separators.
QStyle::SH_TitleBar_ModifyNotification	48	Indicates if the title bar should show a '*' for windows that are modified.
QStyle::SH_Button_FocusPolicy	49	用于按钮的默认聚焦策略。
QStyle::SH_CustomBase	0xf0000000	Base value for custom style hints. Custom values must be greater than this value.
QStyle::SH_MessageBox_UseBorderForButtonSpacing	50	A boolean indicating what the to use the border of the buttons (computed as half the button height) for the spacing of the button in a message box.
QStyle::SH_MessageBox_CenterButtons	73	A boolean indicating whether the buttons in the message box should be centered or not (see QDialogButtonBox::setCentered()).
QStyle::SH_MessageBox_TextInteractionFlags	70	A boolean indicating if the text in a message box should allow user interfactions (e.g. selection) or not.
QStyle::SH_TitleBar_AutoRaise	51	A boolean indicating whether controls on a title bar ought to update when the mouse is over them.
QStyle::SH_ToolButton_PopupDelay	52	An int indicating the popup delay in milliseconds for menus attached to tool buttons.
QStyle::SH_FocusFrame_Mask	53	The mask of the focus frame.
QStyle::SH_RubberBand_Mask	54	The mask of the rubber band.
QStyle::SH_WindowFrame_Mask	55	The mask of the window frame.
QStyle::SH_SpinControls_DisableOnBounds	56	Determines if the spin controls will shown as disabled when reaching the spin range boundary.
QStyle::SH_Dial_BackgroundRole	57	Defines the style's preferred background role (as QPalette::ColorRole ) for a dial widget.
QStyle::SH_ComboBox_LayoutDirection	58	The layout direction for the combo box. By default it should be the same as indicated by the QStyleOption::direction 变量。
QStyle::SH_ItemView_EllipsisLocation	59	The location where ellipses should be added for item text that is too long to fit in an view item.
QStyle::SH_ItemView_ShowDecorationSelected	60	When an item in an item view is selected, also highlight the branch or other decoration.
QStyle::SH_ItemView_ActivateItemOnSingleClick	61	发射激活信号当用户单击项视图中的项的项时。否则，信号被发射当用户双击项时。
QStyle::SH_Slider_AbsoluteSetButtons	64	Which mouse buttons cause a slider to set the value to the position clicked on.
QStyle::SH_Slider_PageSetButtons	65	Which mouse buttons cause a slider to page step the value.
QStyle::SH_TabBar_ElideMode	67	The default eliding style for a tab bar.
QStyle::SH_DialogButtonLayout	68	Controls how buttons are laid out in a QDialogButtonBox , returns a QDialogButtonBox::ButtonLayout 枚举。
QStyle::SH_WizardStyle	79	Controls the look and feel of a QWizard 。返回 QWizard::WizardStyle 枚举。
QStyle::SH_FormLayoutWrapPolicy	86	Provides a default for how rows are wrapped in a QFormLayout 。返回 QFormLayout::RowWrapPolicy 枚举。
QStyle::SH_FormLayoutFieldGrowthPolicy	89	Provides a default for how fields can grow in a QFormLayout 。返回 QFormLayout::FieldGrowthPolicy 枚举。
QStyle::SH_FormLayoutFormAlignment	90	Provides a default for how a QFormLayout aligns its contents within the available space. Returns a Qt::Alignment 枚举。
QStyle::SH_FormLayoutLabelAlignment	91	Provides a default for how a QFormLayout aligns labels within the available space. Returns a Qt::Alignment 枚举。
QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren	80	Controls whether the tree view will select the first child when it is exapanded and the right arrow key is pressed.
QStyle::SH_ComboBox_PopupFrameStyle	69	The frame style used when drawing a combobox popup menu.
QStyle::SH_DialogButtonBox_ButtonsHaveIcons	71	Indicates whether or not StandardButtons in QDialogButtonBox should have icons or not.
QStyle::SH_ItemView_MovementWithoutUpdatingSelection	75	The item view is able to indicate a current item without changing the selection.
QStyle::SH_ToolTip_Mask	76	The mask of a tool tip.
QStyle::SH_FocusFrame_AboveWidget	77	The FocusFrame is stacked above the widget that it is "focusing on".
QStyle::SH_TextControl_FocusIndicatorTextCharFormat	78	Specifies the text format used to highlight focused anchors in rich text documents displayed for example in QTextBrowser . The format has to be a QTextCharFormat returned in the variant of the QStyleHintReturnVariant return value. The QTextFormat::OutlinePen property is used for the outline and QTextFormat::BackgroundBrush for the background of the highlighted area.
QStyle::SH_Menu_FlashTriggeredItem	82	刷新触发项。
QStyle::SH_Menu_FadeOutOnHide	83	Fade out the menu instead of hiding it immediately.
QStyle::SH_TabWidget_DefaultTabPosition	87	选项卡栏在选项卡 Widget 中的默认位置。
QStyle::SH_ToolBar_Movable	88	Determines if the tool bar is movable by default.
QStyle::SH_ItemView_PaintAlternatingRowColorsForEmptyArea	85	Whether QTreeView paints alternating row colors for the area that does not have any items.
QStyle::SH_Menu_Mask	81	用于弹出菜单的遮罩。
QStyle::SH_ItemView_DrawDelegateFrame	92	Determines if there should be a frame for a delegate widget.
QStyle::SH_TabBar_CloseButtonPosition	93	Determines the position of the close button on a tab in a tab bar.
QStyle::SH_DockWidget_ButtonsHaveFrame	94	Determines if dockwidget buttons should have frames. Default is true.
QStyle::SH_ToolButtonStyle	95	Determines the default system style for tool buttons that uses Qt::ToolButtonFollowStyle .
QStyle::SH_RequestSoftwareInputPanel	96	Determines when a software input panel should be requested by input widgets. Returns an enum of type QStyle::RequestSoftwareInputPanel .
QStyle::SH_ScrollBar_Transient	97	Determines if the style supports transient scroll bars. Transient scroll bars appear when the content is scrolled and disappear when they are no longer needed.
QStyle::SH_Menu_SupportsSections	98	Determines if the style displays sections in menus or treat them as plain separators. Sections are separators with a text and icon hint.
QStyle::SH_ToolTip_WakeUpDelay	99	Determines the delay before a tooltip is shown, in milliseconds.
QStyle::SH_ToolTip_FallAsleepDelay	100	Determines the delay (in milliseconds) before a new wake time is needed when a tooltip is shown (notice: shown, not hidden). When a new wake isn't needed, a user-requested tooltip will be shown nearly instantly.
QStyle::SH_Widget_Animate	101	弃用。使用 SH_Widget_Animation_Duration 代替。
QStyle::SH_Splitter_OpaqueResize	102	Determines if widgets are resized dynamically (opaquely) while interactively moving the splitter. This enum value was introduced in Qt 5.2.
QStyle::SH_TabBar_ChangeCurrentDelay	105	Determines the delay before the current tab is changed while dragging over the tabbar, in milliseconds. This enum value has been introduced in Qt 5.4
QStyle::SH_ItemView_ScrollMode	112	由样式指定的默认垂直/水平卷动模式。可以被覆盖采用 QAbstractItemView::setVerticalScrollMode () 和 QAbstractItemView::setHorizontalScrollMode ()。该枚举值在 Qt 5.7 引入。
QStyle::SH_TitleBar_ShowToolTipsOnButtons	113	Determines if tool tips are shown on window title bar buttons. The Mac style, for example, sets this to false. This enum value has been introduced in Qt 5.10.
QStyle::SH_Widget_Animation_Duration	114	Determines how much an animation should last (in ms). A value equal to zero means that the animations will be disabled. This enum value has been introduced in Qt 5.10.
QStyle::SH_ComboBox_AllowWheelScrolling	115	Determines if the mouse wheel can be used to scroll inside a QComboBox . This is on by default in all styles except the Mac style. This enum value has been introduced in Qt 5.10.
QStyle::SH_SpinBox_ButtonsInsideFrame	116	Determines if the spin box buttons are inside the line edit frame. This enum value has been introduced in Qt 5.11.
QStyle::SH_SpinBox_StepModifier	117	Determines which Qt::KeyboardModifier increases the step rate of QAbstractSpinBox 。可能的值是 Qt::NoModifier , Qt::ControlModifier (默认) 或 Qt::ShiftModifier . Qt::NoModifier disables this feature. This enum value has been introduced in Qt 5.12.

另请参阅 styleHint ().

enum QStyle:: SubControl
flags QStyle:: SubControls

此枚举描述可用子控件。子控件是复杂控件中的控件元素 ( ComplexControl ).

常量	值	描述
QStyle::SC_None	0x00000000	Special value that matches no other sub control.
QStyle::SC_ScrollBarAddLine	0x00000001	Scroll bar add line (i.e., down/right arrow); see also QScrollBar .
QStyle::SC_ScrollBarSubLine	0x00000002	Scroll bar sub line (i.e., up/left arrow).
QStyle::SC_ScrollBarAddPage	0x00000004	Scroll bar add page (i.e., page down).
QStyle::SC_ScrollBarSubPage	0x00000008	Scroll bar sub page (i.e., page up).
QStyle::SC_ScrollBarFirst	0x00000010	Scroll bar first line (i.e., home).
QStyle::SC_ScrollBarLast	0x00000020	Scroll bar last line (i.e., end).
QStyle::SC_ScrollBarSlider	0x00000040	Scroll bar slider handle.
QStyle::SC_ScrollBarGroove	0x00000080	Special sub-control which contains the area in which the slider handle may move.
QStyle::SC_SpinBoxUp	0x00000001	Spin widget up/increase; see also QSpinBox .
QStyle::SC_SpinBoxDown	0x00000002	Spin widget down/decrease.
QStyle::SC_SpinBoxFrame	0x00000004	Spin widget frame.
QStyle::SC_SpinBoxEditField	0x00000008	Spin widget edit field.
QStyle::SC_ComboBoxEditField	0x00000002	Combobox edit field; see also QComboBox .
QStyle::SC_ComboBoxArrow	0x00000004	Combobox arrow button.
QStyle::SC_ComboBoxFrame	0x00000001	Combobox frame.
QStyle::SC_ComboBoxListBoxPopup	0x00000008	The reference rectangle for the combobox popup. Used to calculate the position of the popup.
QStyle::SC_SliderGroove	0x00000001	Special sub-control which contains the area in which the slider handle may move.
QStyle::SC_SliderHandle	0x00000002	滑块处理。
QStyle::SC_SliderTickmarks	0x00000004	Slider tickmarks.
QStyle::SC_ToolButton	0x00000001	Tool button (see also QToolButton ).
QStyle::SC_ToolButtonMenu	0x00000002	Sub-control for opening a popup menu in a tool button.
QStyle::SC_TitleBarSysMenu	0x00000001	System menu button (i.e., restore, close, etc.).
QStyle::SC_TitleBarMinButton	0x00000002	最小化按钮。
QStyle::SC_TitleBarMaxButton	0x00000004	最大化按钮。
QStyle::SC_TitleBarCloseButton	0x00000008	关闭按钮。
QStyle::SC_TitleBarLabel	0x00000100	窗口标题标签。
QStyle::SC_TitleBarNormalButton	0x00000010	Normal (restore) button.
QStyle::SC_TitleBarShadeButton	0x00000020	Shade button.
QStyle::SC_TitleBarUnshadeButton	0x00000040	Unshade button.
QStyle::SC_TitleBarContextHelpButton	0x00000080	上下文帮助按钮。
QStyle::SC_DialHandle	0x00000002	The handle of the dial (i.e. what you use to control the dial).
QStyle::SC_DialGroove	0x00000001	The groove for the dial.
QStyle::SC_DialTickmarks	0x00000004	The tickmarks for the dial.
QStyle::SC_GroupBoxFrame	0x00000008	The frame of a group box.
QStyle::SC_GroupBoxLabel	0x00000002	The title of a group box.
QStyle::SC_GroupBoxCheckBox	0x00000001	The optional check box of a group box.
QStyle::SC_GroupBoxContents	0x00000004	The group box contents.
QStyle::SC_MdiNormalButton	0x00000002	The normal button for a MDI subwindow in the menu bar.
QStyle::SC_MdiMinButton	0x00000001	The minimize button for a MDI subwindow in the menu bar.
QStyle::SC_MdiCloseButton	0x00000004	The close button for a MDI subwindow in the menu bar.
QStyle::SC_All	0xffffffff	Special value that matches all sub-controls.

SubControls 类型是 typedef 对于 QFlags <SubControl>。它存储 SubControl 值的 OR 组合。

另请参阅 ComplexControl .

enum QStyle:: SubElement

This enum represents a sub-area of a widget. Style implementations use these areas to draw the different parts of a widget.

常量	值	描述
QStyle::SE_PushButtonContents	0	Area containing the label (icon with text or pixmap).
QStyle::SE_PushButtonFocusRect	1	Area for the focus rect (usually larger than the contents rect).
QStyle::SE_PushButtonLayoutItem	38	Area that counts for the parent layout.
QStyle::SE_CheckBoxIndicator	2	Area for the state indicator (e.g., check mark).
QStyle::SE_CheckBoxContents	3	Area for the label (text or pixmap).
QStyle::SE_CheckBoxFocusRect	4	Area for the focus indicator.
QStyle::SE_CheckBoxClickRect	5	Clickable area, defaults to SE_CheckBoxFocusRect.
QStyle::SE_CheckBoxLayoutItem	32	Area that counts for the parent layout.
QStyle::SE_DateTimeEditLayoutItem	34	Area that counts for the parent layout.
QStyle::SE_RadioButtonIndicator	6	Area for the state indicator.
QStyle::SE_RadioButtonContents	7	Area for the label.
QStyle::SE_RadioButtonFocusRect	8	Area for the focus indicator.
QStyle::SE_RadioButtonClickRect	9	Clickable area, defaults to SE_RadioButtonFocusRect.
QStyle::SE_RadioButtonLayoutItem	39	Area that counts for the parent layout.
QStyle::SE_ComboBoxFocusRect	10	Area for the focus indicator.
QStyle::SE_SliderFocusRect	11	Area for the focus indicator.
QStyle::SE_SliderLayoutItem	40	Area that counts for the parent layout.
QStyle::SE_SpinBoxLayoutItem	41	Area that counts for the parent layout.
QStyle::SE_ProgressBarGroove	12	Area for the groove.
QStyle::SE_ProgressBarContents	13	Area for the progress indicator.
QStyle::SE_ProgressBarLabel	14	Area for the text label.
QStyle::SE_ProgressBarLayoutItem	37	Area that counts for the parent layout.
QStyle::SE_FrameContents	27	Area for a frame's contents.
QStyle::SE_ShapedFrameContents	52	Area for a frame's contents using the shape in QStyleOptionFrame ；见 QFrame
QStyle::SE_FrameLayoutItem	43	Area that counts for the parent layout.
QStyle::SE_HeaderArrow	17	Area for the sort indicator for a header.
QStyle::SE_HeaderLabel	16	Area for the label in a header.
QStyle::SE_LabelLayoutItem	36	Area that counts for the parent layout.
QStyle::SE_LineEditContents	26	Area for a line edit's contents.
QStyle::SE_TabWidgetLeftCorner	21	Area for the left corner widget in a tab widget.
QStyle::SE_TabWidgetRightCorner	22	Area for the right corner widget in a tab widget.
QStyle::SE_TabWidgetTabBar	18	Area for the tab bar widget in a tab widget.
QStyle::SE_TabWidgetTabContents	20	Area for the contents of the tab widget.
QStyle::SE_TabWidgetTabPane	19	Area for the pane of a tab widget.
QStyle::SE_TabWidgetLayoutItem	45	Area that counts for the parent layout.
QStyle::SE_ToolBoxTabContents	15	Area for a toolbox tab's icon and label.
QStyle::SE_ToolButtonLayoutItem	42	Area that counts for the parent layout.
QStyle::SE_ItemViewItemCheckIndicator	SE_ViewItemCheckIndicator	Area for a view item's check mark.
QStyle::SE_TabBarTearIndicator	24	Deprecated. Use SE_TabBarTearIndicatorLeft instead.
QStyle::SE_TabBarTearIndicatorLeft	SE_TabBarTearIndicator	Area for the tear indicator on the left side of a tab bar with scroll arrows.
QStyle::SE_TabBarTearIndicatorRight	56	Area for the tear indicator on the right side of a tab bar with scroll arrows.
QStyle::SE_TabBarScrollLeftButton	54	Area for the scroll left button on a tab bar with scroll buttons.
QStyle::SE_TabBarScrollRightButton	55	Area for the scroll right button on a tab bar with scroll buttons.
QStyle::SE_TreeViewDisclosureItem	25	Area for the actual disclosure item in a tree branch.
QStyle::SE_DialogButtonBoxLayoutItem	35	Area that counts for the parent layout.
QStyle::SE_GroupBoxLayoutItem	44	Area that counts for the parent layout.
QStyle::SE_CustomBase	0xf0000000	Base value for custom sub-elements. Custom values must be greater than this value.
QStyle::SE_DockWidgetFloatButton	29	The float button of a dock widget.
QStyle::SE_DockWidgetTitleBarText	30	The text bounds of the dock widgets title.
QStyle::SE_DockWidgetCloseButton	28	The close button of a dock widget.
QStyle::SE_DockWidgetIcon	31	The icon of a dock widget.
QStyle::SE_ComboBoxLayoutItem	33	Area that counts for the parent layout.
QStyle::SE_ItemViewItemDecoration	46	Area for a view item's decoration (icon).
QStyle::SE_ItemViewItemText	47	Area for a view item's text.
QStyle::SE_ItemViewItemFocusRect	48	Area for a view item's focus rect.
QStyle::SE_TabBarTabLeftButton	49	Area for a widget on the left side of a tab in a tab bar.
QStyle::SE_TabBarTabRightButton	50	Area for a widget on the right side of a tab in a tab bar.
QStyle::SE_TabBarTabText	51	Area for the text on a tab in a tab bar.
QStyle::SE_ToolBarHandle	53	Area for the handle of a tool bar.

另请参阅 subElementRect ().

成员函数文档编制

QStyle:: QStyle ()

构造样式对象。

[虚拟] QStyle:: ~QStyle ()

销毁样式对象。

[static] QRect QStyle:: alignedRect ( Qt::LayoutDirection direction , Qt::Alignment alignment , const QSize & size , const QRect & rectangle )

Returns a new rectangle of the specified size that is aligned to the given rectangle 根据指定 alignment and direction .

int QStyle:: combinedLayoutSpacing ( QSizePolicy::ControlTypes controls1 , QSizePolicy::ControlTypes controls2 , Qt::Orientation orientation , QStyleOption * option = nullptr, QWidget * widget = nullptr) const

Returns the spacing that should be used between controls1 and controls2 在布局。 orientation 指定控件是并排布局，还是垂直堆叠。 option 参数可以用于传递父级 Widget 的有关额外信息。 widget 参数是可选的，且也可以使用若 option 为 0。

controls1 and controls2 是 OR 组合对于零个或多个 控件类型 .

This function is called by the layout system. It is used only if PM_LayoutHorizontalSpacing or PM_LayoutVerticalSpacing 返回负值。

该函数在 Qt 4.3 引入。

另请参阅 layoutSpacing ().

[pure virtual] void QStyle:: drawComplexControl ( QStyle::ComplexControl control , const QStyleOptionComplex * option , QPainter * painter , const QWidget * widget = nullptr) const

绘制给定 control 使用提供 painter 采用的样式选项指定通过 option .

The widget 自变量是可选的且可用作绘制控件的辅助。

The option 参数是指针指向 QStyleOptionComplex object that can be cast to the correct subclass using the qstyleoption_cast () 函数。注意 rect member of the specified option must be in logical coordinates. Reimplementations of this function should use visualRect () to change the logical coordinates into screen coordinates before calling the drawPrimitive () 或 drawControl () 函数。

The table below is listing the complex control elements and their associated style option subclass. The style options contain all the parameters required to draw the controls, including QStyleOption::state which holds the style flags that are used when drawing. The table also describes which flags that are set when casting the given option to the appropriate subclass.

复杂控件	QStyleOptionComplex 子类	样式标志	备注
CC_SpinBox	QStyleOptionSpinBox	State_Enabled	Set if the spin box is enabled.
		State_HasFocus	Set if the spin box has input focus.
CC_ComboBox	QStyleOptionComboBox	State_Enabled	Set if the combobox is enabled.
		State_HasFocus	Set if the combobox has input focus.
CC_ScrollBar	QStyleOptionSlider	State_Enabled	Set if the scroll bar is enabled.
		State_HasFocus	Set if the scroll bar has input focus.
CC_Slider	QStyleOptionSlider	State_Enabled	Set if the slider is enabled.
		State_HasFocus	Set if the slider has input focus.
CC_Dial	QStyleOptionSlider	State_Enabled	Set if the dial is enabled.
		State_HasFocus	Set if the dial has input focus.
CC_ToolButton	QStyleOptionToolButton	State_Enabled	Set if the tool button is enabled.
		State_HasFocus	Set if the tool button has input focus.
		State_DownArrow	Set if the tool button is down (i.e., a mouse button or the space bar is pressed).
		State_On	Set if the tool button is a toggle button and is toggled on.
		State_AutoRaise	Set if the tool button has auto-raise enabled.
		State_Raised	Set if the button is not down, not on, and doesn't contain the mouse when auto-raise is enabled.
CC_TitleBar	QStyleOptionTitleBar	State_Enabled	Set if the title bar is enabled.

另请参阅 drawPrimitive () 和 drawControl ().

[pure virtual] void QStyle:: drawControl ( QStyle::ControlElement element , const QStyleOption * option , QPainter * painter , const QWidget * widget = nullptr) const

绘制给定 element 采用提供 painter 采用的样式选项指定通过 option .

The widget 自变量是可选的且可用作绘制控件的辅助。 option 参数是指针指向 QStyleOption object that can be cast to the correct subclass using the qstyleoption_cast () 函数。

The table below is listing the control elements and their associated style option subclass. The style options contain all the parameters required to draw the controls, including QStyleOption::state which holds the style flags that are used when drawing. The table also describes which flags that are set when casting the given option to the appropriate subclass.

Note that if a control element is not listed here, it is because it uses a plain QStyleOption 对象。

Control Element	QStyleOption 子类	样式标志	备注
CE_MenuItem , CE_MenuBarItem	QStyleOptionMenuItem	State_Selected	The menu item is currently selected item.
		State_Enabled	The item is enabled.
		State_DownArrow	Indicates that a scroll down arrow should be drawn.
		State_UpArrow	Indicates that a scroll up arrow should be drawn
		State_HasFocus	Set if the menu bar has input focus.
CE_PushButton , CE_PushButtonBevel , CE_PushButtonLabel	QStyleOptionButton	State_Enabled	Set if the button is enabled.
		State_HasFocus	Set if the button has input focus.
		State_Raised	Set if the button is not down, not on and not flat.
		State_On	Set if the button is a toggle button and is toggled on.
		State_Sunken	Set if the button is down (i.e., the mouse button or the space bar is pressed on the button).
CE_RadioButton , CE_RadioButtonLabel , CE_CheckBox , CE_CheckBoxLabel	QStyleOptionButton	State_Enabled	Set if the button is enabled.
		State_HasFocus	Set if the button has input focus.
		State_On	Set if the button is checked.
		State_Off	Set if the button is not checked.
		State_NoChange	Set if the button is in the NoChange state.
		State_Sunken	Set if the button is down (i.e., the mouse button or the space bar is pressed on the button).
CE_ProgressBarContents , CE_ProgressBarLabel , CE_ProgressBarGroove	QStyleOptionProgressBar	State_Enabled	Set if the progress bar is enabled.
		State_HasFocus	Set if the progress bar has input focus.
CE_Header , CE_HeaderSection , CE_HeaderLabel	QStyleOptionHeader
CE_TabBarTab , CE_TabBarTabShape , CE_TabBarTabLabel	QStyleOptionTab	State_Enabled	Set if the tab bar is enabled.
		State_Selected	The tab bar is the currently selected tab bar.
		State_HasFocus	Set if the tab bar tab has input focus.
CE_ToolButtonLabel	QStyleOptionToolButton	State_Enabled	Set if the tool button is enabled.
		State_HasFocus	Set if the tool button has input focus.
		State_Sunken	Set if the tool button is down (i.e., a mouse button or the space bar is pressed).
		State_On	Set if the tool button is a toggle button and is toggled on.
		State_AutoRaise	Set if the tool button has auto-raise enabled.
		State_MouseOver	Set if the mouse pointer is over the tool button.
		State_Raised	Set if the button is not down and is not on.
CE_ToolBoxTab	QStyleOptionToolBox	State_Selected	The tab is the currently selected tab.
CE_HeaderSection	QStyleOptionHeader	State_Sunken	Indicates that the section is pressed.
		State_UpArrow	Indicates that the sort indicator should be pointing up.
		State_DownArrow	Indicates that the sort indicator should be pointing down.

另请参阅 drawPrimitive () 和 drawComplexControl ().

[虚拟] void QStyle:: drawItemPixmap ( QPainter * painter , const QRect & rectangle , int alignment , const QPixmap & pixmap ) const

绘制给定 pixmap 以指定 rectangle ，根据指定 alignment ，使用提供 painter .

另请参阅 drawItemText ().

[虚拟] void QStyle:: drawItemText ( QPainter * painter , const QRect & rectangle , int alignment , const QPalette & palette , bool enabled , const QString & text , QPalette::ColorRole textRole = QPalette::NoRole) const

绘制给定 text 以指定 rectangle 使用提供 painter and palette .

文本的绘制是使用描绘器钢笔、对齐及换行，根据指定 alignment 。若明确 textRole 被指定，文本的绘制是使用 palette 的颜色对于给定角色。 enabled 参数指示是否启用项；当重实现此函数时， enabled 参数影响应如何绘制项。

另请参阅 Qt::Alignment and drawItemPixmap ().

[pure virtual] void QStyle:: drawPrimitive ( QStyle::PrimitiveElement element , const QStyleOption * option , QPainter * painter , const QWidget * widget = nullptr) const

绘制给定图元 element 采用提供 painter 使用样式选项指定通过 option .

The widget 自变量是可选的，且可能包含可以辅助图元元素绘制的 Widget。

The table below is listing the primitive elements and their associated style option subclasses. The style options contain all the parameters required to draw the elements, including QStyleOption::state which holds the style flags that are used when drawing. The table also describes which flags that are set when casting the given option to the appropriate subclass.

注意，若这里没有列出图元元素，是因为它使用纯 QStyleOption 对象。

图元元素	QStyleOption 子类	样式标志	备注
PE_FrameFocusRect	QStyleOptionFocusRect	State_FocusAtBorder	Whether the focus is is at the border or inside the widget.
PE_IndicatorCheckBox	QStyleOptionButton	State_NoChange	Indicates a "tri-state" checkbox.
		State_On	Indicates the indicator is checked.
PE_IndicatorRadioButton	QStyleOptionButton	State_On	Indicates that a radio button is selected.
State_NoChange	Indicates a "tri-state" controller.
State_Enabled	Indicates the controller is enabled.
PE_IndicatorBranch	QStyleOption	State_Children	Indicates that the control for expanding the tree to show child items, should be drawn.
		State_Item	Indicates that a horizontal branch (to show a child item), should be drawn.
		State_Open	Indicates that the tree branch is expanded.
		State_Sibling	Indicates that a vertical line (to show a sibling item), should be drawn.
PE_IndicatorHeaderArrow	QStyleOptionHeader	State_UpArrow	Indicates that the arrow should be drawn up; otherwise it should be down.
PE_FrameGroupBox , PE_Frame , PE_FrameLineEdit , PE_FrameMenu , PE_FrameDockWidget , PE_FrameWindow	QStyleOptionFrame	State_Sunken	Indicates that the Frame should be sunken.
PE_IndicatorToolBarHandle	QStyleOption	State_Horizontal	Indicates that the window handle is horizontal instead of vertical.
PE_IndicatorSpinPlus , PE_IndicatorSpinMinus , PE_IndicatorSpinUp , PE_IndicatorSpinDown ,	QStyleOptionSpinBox	State_Sunken	Indicates that the button is pressed.
PE_PanelButtonCommand	QStyleOptionButton	State_Enabled	Set if the button is enabled.
		State_HasFocus	Set if the button has input focus.
		State_Raised	Set if the button is not down, not on and not flat.
		State_On	Set if the button is a toggle button and is toggled on.
		State_Sunken	Set if the button is down (i.e., the mouse button or the space bar is pressed on the button).

另请参阅 drawComplexControl () 和 drawControl ().

[pure virtual] QPixmap QStyle:: generatedIconPixmap ( QIcon::Mode iconMode , const QPixmap & pixmap , const QStyleOption * option ) const

返回副本为给定 pixmap ，样式化要符合指定 iconMode 并考虑调色板指定通过 option .

The option 参数可以传递额外信息，但它必须包含调色板。

注意，并非所有像素图都符合，在这种情况下，返回的像素图是纯副本。

另请参阅 QIcon .

[pure virtual] QStyle::SubControl QStyle:: hitTestComplexControl ( QStyle::ComplexControl control , const QStyleOptionComplex * option , const QPoint & position , const QWidget * widget = nullptr) const

返回子控件在给定 position 在给定复杂 control (采用的样式选项指定通过 option ).

注意， position 以屏幕坐标表达。

The option 自变量是指针指向 QStyleOptionComplex object (or one of its subclasses). The object can be cast to the appropriate type using the qstyleoption_cast () 函数。见 drawComplexControl () 了解细节。 widget argument is optional and can contain additional information for the function.

另请参阅 drawComplexControl () 和 subControlRect ().

[虚拟] QRect QStyle:: itemPixmapRect (const QRect & rectangle , int alignment , const QPixmap & pixmap ) const

返回区域在给定 rectangle in which to draw the specified pixmap according to the defined alignment .

[虚拟] QRect QStyle:: itemTextRect (const QFontMetrics & metrics , const QRect & rectangle , int alignment , bool enabled , const QString & text ) const

返回区域在给定 rectangle in which to draw the provided text according to the specified font metrics and alignment 。 enabled parameter indicates whether or not the associated item is enabled.

若给定 rectangle is larger than the area needed to render the text , the rectangle that is returned will be offset within rectangle 根据指定 alignment . For example, if alignment is Qt::AlignCenter , the returned rectangle will be centered within rectangle . If the given rectangle is smaller than the area needed, the returned rectangle will be the smallest rectangle large enough to render the text .

另请参阅 Qt::Alignment .

[pure virtual] int QStyle:: layoutSpacing ( QSizePolicy::ControlType control1 , QSizePolicy::ControlType control2 , Qt::Orientation orientation , const QStyleOption * option = ..., const QWidget * widget = ...) const

Returns the spacing that should be used between control1 and control2 在布局。 orientation 指定控件是并排布局，还是垂直堆叠。 option 参数可以用于传递父级 Widget 的有关额外信息。 widget 参数是可选的，且也可以使用若 option 为 0。

This function is called by the layout system. It is used only if PM_LayoutHorizontalSpacing or PM_LayoutVerticalSpacing 返回负值。

该函数在 Qt 4.3 引入。

另请参阅 combinedLayoutSpacing ().

[pure virtual] int QStyle:: pixelMetric ( QStyle::PixelMetric metric , const QStyleOption * option = nullptr, const QWidget * widget = nullptr) const

返回值为给定像素 metric .

指定 option and widget can be used for calculating the metric. In general, the widget argument is not used. The option can be cast to the appropriate type using the qstyleoption_cast () 函数。注意 option may be zero even for PixelMetrics that can make use of it. See the table below for the appropriate option 铸造：

像素规格	QStyleOption 子类
PM_SliderControlThickness	QStyleOptionSlider
PM_SliderLength	QStyleOptionSlider
PM_SliderTickmarkOffset	QStyleOptionSlider
PM_SliderSpaceAvailable	QStyleOptionSlider
PM_ScrollBarExtent	QStyleOptionSlider
PM_TabBarTabOverlap	QStyleOptionTab
PM_TabBarTabHSpace	QStyleOptionTab
PM_TabBarTabVSpace	QStyleOptionTab
PM_TabBarBaseHeight	QStyleOptionTab
PM_TabBarBaseOverlap	QStyleOptionTab

Some pixel metrics are called from widgets and some are only called internally by the style. If the metric is not called by a widget, it is the discretion of the style author to make use of it. For some styles, this may not be appropriate.

[虚拟] void QStyle:: polish ( QWidget * widget )

初始化外观为给定 widget .

This function is called for every widget at some point after it has been fully created but just before it is shown for the very first time.

Note that the default implementation does nothing. Reasonable actions in this function might be to call the QWidget::setBackgroundMode() function for the widget. Do not use the function to set, for example, the geometry. Reimplementing this function provides a back-door through which the appearance of a widget can be changed, but with Qt's style engine it is rarely necessary to implement this function; reimplement drawItemPixmap (), drawItemText (), drawPrimitive (), etc. instead.

The QWidget::inherits () function may provide enough information to allow class-specific customizations. But because new QStyle subclasses are expected to work reasonably with all current and future widgets, limited use of hard-coded customization is recommended.

另请参阅 unpolish ().

[虚拟] void QStyle:: polish ( QApplication * application )

这是重载函数。

迟延初始化给定 application 对象。

[虚拟] void QStyle:: polish ( QPalette & palette )

这是重载函数。

改变 palette according to style specific requirements for color palettes (if any).

另请参阅 QPalette and QApplication::setPalette ().

const QStyle *QStyle:: proxy () const

This function returns the current proxy for this style. By default most styles will return themselves. However when a proxy style is in use, it will allow the style to call back into its proxy.

该函数在 Qt 4.6 引入。

[pure virtual] QSize QStyle:: sizeFromContents ( QStyle::ContentsType type , const QStyleOption * option , const QSize & contentsSize , const QWidget * widget = nullptr) const

Returns the size of the element described by the specified option and type ，基于提供的 contentsSize .

The option 自变量是指针指向 QStyleOption or one of its subclasses. The option can be cast to the appropriate type using the qstyleoption_cast () 函数。 widget is an optional argument and can contain extra information used for calculating the size.

见下表了解适当 option 铸造：

内容类型	QStyleOption 子类
CT_CheckBox	QStyleOptionButton
CT_ComboBox	QStyleOptionComboBox
CT_GroupBox	QStyleOptionGroupBox
CT_HeaderSection	QStyleOptionHeader
CT_ItemViewItem	QStyleOptionViewItem
CT_LineEdit	QStyleOptionFrame
CT_MdiControls	QStyleOptionComplex
CT_Menu	QStyleOption
CT_MenuItem	QStyleOptionMenuItem
CT_MenuBar	QStyleOptionMenuItem
CT_MenuBarItem	QStyleOptionMenuItem
CT_ProgressBar	QStyleOptionProgressBar
CT_PushButton	QStyleOptionButton
CT_RadioButton	QStyleOptionButton
CT_ScrollBar	QStyleOptionSlider
CT_SizeGrip	QStyleOption
CT_Slider	QStyleOptionSlider
CT_SpinBox	QStyleOptionSpinBox
CT_Splitter	QStyleOption
CT_TabBarTab	QStyleOptionTab
CT_TabWidget	QStyleOptionTabWidgetFrame
CT_ToolButton	QStyleOptionToolButton

另请参阅 ContentsType and QStyleOption .

[static] int QStyle:: sliderPositionFromValue ( int min , int max , int logicalValue , int span , bool upsideDown = false)

转换给定 logicalValue 到像素位置。 min 参数映射到 0， max 映射到 span 和其它值在之间均匀分布。

This function can handle the entire integer range without overflow, providing that span 小于 4096。

By default, this function assumes that the maximum value is on the right for horizontal items and on the bottom for vertical items. Set the upsideDown 参数为 true 以反转此行为。

另请参阅 sliderValueFromPosition ().

[static] int QStyle:: sliderValueFromPosition ( int min , int max , int position , int span , bool upsideDown = false)

转换给定像素 position 到逻辑值。0 映射到 min 参数， span 映射到 max 和其它值在之间均匀分布。

此函数可以处理整个整数范围而不溢出。

By default, this function assumes that the maximum value is on the right for horizontal items and on the bottom for vertical items. Set the upsideDown 参数为 true 以反转此行为。

另请参阅 sliderPositionFromValue ().

[pure virtual] QIcon QStyle:: standardIcon ( QStyle::StandardPixmap standardIcon , const QStyleOption * option = ..., const QWidget * widget = ...) const

返回图形为给定 standardIcon .

The standardIcon is a standard pixmap which can follow some existing GUI style or guideline. The option argument can be used to pass extra information required when defining the appropriate icon. The widget argument is optional and can also be used to aid the determination of the icon.

该函数在 Qt 4.1 引入。

[虚拟] QPalette QStyle:: standardPalette () const

返回样式的标准调色板。

Note that on systems that support system colors, the style's standard palette is not used. In particular, the Windows Vista and Mac styles do not use the standard palette, but make use of native theme engines. With these styles, you should not set the palette with QApplication::setPalette ().

另请参阅 QApplication::setPalette ().

[pure virtual] int QStyle:: styleHint ( QStyle::StyleHint hint , const QStyleOption * option = nullptr, const QWidget * widget = nullptr, QStyleHintReturn * returnData = nullptr) const

Returns an integer representing the specified style hint 为给定 widget described by the provided style option .

returnData is used when the querying widget needs more detailed data than the integer that styleHint() returns. See the QStyleHintReturn 类描述了解细节。

[pure virtual] QRect QStyle:: subControlRect ( QStyle::ComplexControl control , const QStyleOptionComplex * option , QStyle::SubControl subControl , const QWidget * widget = nullptr) const

返回的矩形包含指定 subControl 为给定复杂 control (采用样式指定通过 option )。矩形以屏幕坐标定义。

The option 自变量是指针指向 QStyleOptionComplex or one of its subclasses, and can be cast to the appropriate type using the qstyleoption_cast () 函数。见 drawComplexControl () 了解细节。 widget 是可选的，且可以包含额外函数信息。

另请参阅 drawComplexControl ().

[pure virtual] QRect QStyle:: subElementRect ( QStyle::SubElement element , const QStyleOption * option , const QWidget * widget = nullptr) const

返回子区域为给定 element as described in the provided style option . The returned rectangle is defined in screen coordinates.

The widget 自变量是可选的，且可以用于辅助确定区域。 QStyleOption 对象可以被铸造成适当类型使用 qstyleoption_cast () 函数。见下表了解适当 option 铸造：

子元素	QStyleOption 子类
SE_PushButtonContents	QStyleOptionButton
SE_PushButtonFocusRect	QStyleOptionButton
SE_CheckBoxIndicator	QStyleOptionButton
SE_CheckBoxContents	QStyleOptionButton
SE_CheckBoxFocusRect	QStyleOptionButton
SE_RadioButtonIndicator	QStyleOptionButton
SE_RadioButtonContents	QStyleOptionButton
SE_RadioButtonFocusRect	QStyleOptionButton
SE_ComboBoxFocusRect	QStyleOptionComboBox
SE_ProgressBarGroove	QStyleOptionProgressBar
SE_ProgressBarContents	QStyleOptionProgressBar
SE_ProgressBarLabel	QStyleOptionProgressBar

[虚拟] void QStyle:: unpolish ( QWidget * widget )

取消初始化给定 widget 的外观。

此函数搭档 polish (). It is called for every polished widget whenever the style is dynamically changed; the former style has to unpolish its settings before the new style can polish them again.

Note that unpolish() will only be called if the widget is destroyed. This can cause problems in some cases, e.g, if you remove a widget from the UI, cache it, and then reinsert it after the style has changed; some of Qt's classes cache their widgets.

另请参阅 polish ().

[虚拟] void QStyle:: unpolish ( QApplication * application )

这是重载函数。

取消初始化给定 application .

[static] Qt::Alignment QStyle:: visualAlignment ( Qt::LayoutDirection direction , Qt::Alignment alignment )

变换 alignment of Qt::AlignLeft or Qt::AlignRight without Qt::AlignAbsolute into Qt::AlignLeft or Qt::AlignRight with Qt::AlignAbsolute 根据布局 direction 。其它对齐标志保持不变。

若未指定水平对齐方式，函数返回默认对齐方式为给定布局 direction .

QWidget::layoutDirection

[static] QPoint QStyle:: visualPos ( Qt::LayoutDirection direction , const QRect & boundingRectangle , const QPoint & logicalPosition )

返回给定 logicalPosition 转换到屏幕坐标基于指定 direction 。 boundingRectangle 被使用当履行翻译时。

另请参阅 QWidget::layoutDirection .

[static] QRect QStyle:: visualRect ( Qt::LayoutDirection direction , const QRect & boundingRectangle , const QRect & logicalRectangle )

返回给定 logicalRectangle 转换到屏幕坐标基于指定 direction 。 boundingRectangle 被使用当履行翻译时。

提供此函数以支持从右到左的桌面，通常用于实现 subControlRect () 函数。

另请参阅 QWidget::layoutDirection .