QStyle Class

The QStyle class is an abstract base class that encapsulates the look and feel of a GUI. More...

Header:	#include <QStyle>
CMake:	find_package(Qt6 COMPONENTS Widgets REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Widgets)
qmake:	QT += widgets
Inherits:	QObject
Inherited By:	QCommonStyle

• List of all members, including inherited members
• Deprecated members

Public Types

enum	ComplexControl { CC_SpinBox, CC_ComboBox, CC_ScrollBar, CC_Slider, CC_ToolButton, …, CC_CustomBase }
enum	ContentsType { CT_CheckBox, CT_ComboBox, CT_HeaderSection, CT_LineEdit, CT_Menu, …, CT_MdiControls }
enum	ControlElement { CE_PushButton, CE_PushButtonBevel, CE_PushButtonLabel, CE_DockWidgetTitle, CE_Splitter, …, CE_ShapedFrame }
enum	PixelMetric { PM_ButtonMargin, PM_DockWidgetTitleBarButtonMargin, PM_ButtonDefaultIndicator, PM_MenuButtonIndicator, PM_ButtonShiftHorizontal, …, PM_CustomBase }
enum	PrimitiveElement { PE_PanelButtonCommand, PE_FrameDefaultButton, PE_PanelButtonBevel, PE_PanelButtonTool, PE_PanelLineEdit, …, PE_PanelMenu }
enum	RequestSoftwareInputPanel { RSIP_OnMouseClickAndAlreadyFocused, RSIP_OnMouseClick }
enum	StandardPixmap { SP_TitleBarMinButton, SP_TitleBarMenuButton, SP_TitleBarMaxButton, SP_TitleBarCloseButton, SP_TitleBarNormalButton, …, SP_CustomBase }
flags	State
enum	StateFlag { State_None, State_Active, State_AutoRaise, State_Children, State_DownArrow, …, State_Small }
enum	StyleHint { SH_EtchDisabledText, SH_DitherDisabledText, SH_ScrollBar_ContextMenu, SH_ScrollBar_MiddleClickAbsolutePosition, SH_ScrollBar_LeftClickAbsolutePosition, …, SH_TabBar_AllowWheelScrolling }
enum	SubControl { SC_None, SC_ScrollBarAddLine, SC_ScrollBarSubLine, SC_ScrollBarAddPage, SC_ScrollBarSubPage, …, SC_All }
flags	SubControls
enum	SubElement { SE_PushButtonContents, SE_PushButtonFocusRect, SE_PushButtonLayoutItem, SE_PushButtonBevel, SE_CheckBoxIndicator, …, SE_ToolBarHandle }

Public Functions

	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 = nullptr, const QWidget *widget = nullptr) const = 0
QString	name() const
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 = nullptr, const QWidget *widget = nullptr) 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)

Static Public Members

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)
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)

Detailed Description

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 in nine different styles.

Topics:

Setting a Style

The style of the entire application can be set using the QApplication::setStyle() function. It can also be specified by the user of the application, using the -style command-line option:

./myapplication -style windows

If no style is specified, Qt will choose the most appropriate style for the user's platform or desktop environment.

A style can also be set on an individual widget using the QWidget::setStyle() function.

Developing Style-Aware Custom Widgets

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(), and drawComplexControl().

Most QStyle draw functions take four arguments:

• an enum value specifying which graphical element to draw
• a QStyleOption specifying how and where to render that element
• a QPainter that should be used to draw the element
• a QWidget on which the drawing is performed (optional)

For example, if you want to draw a focus rectangle on your widget, you can write:

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 properly.

QStyleOption has various subclasses for the various types of graphical elements that can be drawn. For example, PE_FrameFocusRect expects a QStyleOptionFocusRect argument.

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.

For convenience, Qt provides the QStylePainter class, which combines a QStyle, a QPainter, and a QWidget. This makes it possible to write

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

instead of

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

Creating a Custom Style

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 QCommonStyles.

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(const QWidget *widget);
    ~CustomStyle() {}

    void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
                       QPainter *painter, const QWidget *widget) const override;
};

To draw its up and down arrows, QSpinBox uses the PE_IndicatorSpinUp and PE_IndicatorSpinDown primitive elements. Here's how to reimplement the drawPrimitive() function to draw them differently:

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);
    }
}

Notice that we don't use the 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.

If you need to use the 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 Styles example covers this topic in more detail.

Using a Custom Style

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() static function before creating the QApplication object:

#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();
}

You can call 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.

Compile your plugin and put it into Qt's 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.

Right-to-Left Desktops

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 command-line option or to call QApplication::setLayoutDirection() in your main() function.

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

• subControlRect() and subElementRect() return rectangles in screen coordinates
• 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(), and visualAlignment() are helpful functions that will translate from logical to screen representations.
• alignedRect() will return a logical rect aligned for the current direction

Styles in Item Views

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 Model/View Programming.

When 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);
    }

The primitive element 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.

See also QStyleOption, QStylePainter, Styles Example, Styles and Style Aware Widgets, QStyledItemDelegate, and Styling.

Member Type Documentation

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.

Constant	Value	Description
QStyle::CC_SpinBox	0	A spinbox, like QSpinBox.
QStyle::CC_ComboBox	1	A combobox, like QComboBox.
QStyle::CC_ScrollBar	2	A scroll bar, like QScrollBar.
QStyle::CC_Slider	3	A slider, like QSlider.
QStyle::CC_ToolButton	4	A tool button, like QToolButton.
QStyle::CC_TitleBar	5	A Title bar, like those used in QMdiSubWindow.
QStyle::CC_GroupBox	7	A group box, like QGroupBox.
QStyle::CC_Dial	6	A dial, like 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.

See also 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.

Constant	Value	Description
QStyle::CT_CheckBox	1	A check box, like QCheckBox.
QStyle::CT_ComboBox	4	A combo box, like QComboBox.
QStyle::CT_HeaderSection	19	A header section, like QHeader.
QStyle::CT_LineEdit	14	A line edit, like QLineEdit.
QStyle::CT_Menu	10	A menu, like QMenu.
QStyle::CT_MenuBar	9	A menu bar, like QMenuBar.
QStyle::CT_MenuBarItem	8	A menu bar item, like the buttons in a QMenuBar.
QStyle::CT_MenuItem	7	A menu item, like QMenuItem.
QStyle::CT_ProgressBar	6	A progress bar, like QProgressBar.
QStyle::CT_PushButton	0	A push button, like QPushButton.
QStyle::CT_RadioButton	2	A radio button, like QRadioButton.
QStyle::CT_SizeGrip	16	A size grip, like QSizeGrip.
QStyle::CT_Slider	12	A slider, like QSlider.
QStyle::CT_ScrollBar	13	A scroll bar, like QScrollBar.
QStyle::CT_SpinBox	15	A spin box, like QSpinBox.
QStyle::CT_Splitter	5	A splitter, like QSplitter.
QStyle::CT_TabBarTab	11	A tab on a tab bar, like QTabBar.
QStyle::CT_TabWidget	17	A tab widget, like QTabWidget.
QStyle::CT_ToolButton	3	A tool button, like QToolButton.
QStyle::CT_GroupBox	20	A group box, like QGroupBox.
QStyle::CT_ItemViewItem	22	An item inside an item view.
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.

See also sizeFromContents().

enum QStyle::ControlElement

This enum represents a control element. A control element is a part of a widget that performs some action or displays information to the user.

Constant	Value	Description
QStyle::CE_PushButton	0	A QPushButton, draws CE_PushButtonBevel, CE_PushButtonLabel and PE_FrameFocusRect.
QStyle::CE_PushButtonBevel	1	The bevel and default indicator of a QPushButton.
QStyle::CE_PushButtonLabel	2	The label (an icon with text or pixmap) of a QPushButton.
QStyle::CE_DockWidgetTitle	30	Dock window title.
QStyle::CE_Splitter	28	Splitter handle; see also QSplitter.
QStyle::CE_CheckBox	3	A QCheckBox, draws a PE_IndicatorCheckBox, a CE_CheckBoxLabel and a PE_FrameFocusRect.
QStyle::CE_CheckBoxLabel	4	The label (text or pixmap) of a QCheckBox.
QStyle::CE_RadioButton	5	A QRadioButton, draws a PE_IndicatorRadioButton, a CE_RadioButtonLabel and a PE_FrameFocusRect.
QStyle::CE_RadioButtonLabel	6	The label (text or pixmap) of a QRadioButton.
QStyle::CE_TabBarTab	7	The tab and label within a QTabBar.
QStyle::CE_TabBarTabShape	8	The tab shape within a tab bar.
QStyle::CE_TabBarTabLabel	9	The label within a tab.
QStyle::CE_ProgressBar	10	A QProgressBar, draws CE_ProgressBarGroove, CE_ProgressBarContents and CE_ProgressBarLabel.
QStyle::CE_ProgressBarGroove	11	The groove where the progress indicator is drawn in a QProgressBar.
QStyle::CE_ProgressBarContents	12	The progress indicator of a QProgressBar.
QStyle::CE_ProgressBarLabel	13	The text label of a QProgressBar.
QStyle::CE_ToolButtonLabel	22	A tool button's label.
QStyle::CE_MenuBarItem	20	A menu item in a QMenuBar.
QStyle::CE_MenuBarEmptyArea	21	The empty area of a QMenuBar.
QStyle::CE_MenuItem	14	A menu item in a 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	Window resize handle; see also QSizeGrip.
QStyle::CE_Header	23	A header.
QStyle::CE_HeaderSection	24	A header section.
QStyle::CE_HeaderLabel	25	The header's label.
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	Scroll bar slider.
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	An item inside an item view.
QStyle::CE_CustomBase	0xf0000000	Base value for custom control elements; custom values must be greater than this value.
QStyle::CE_ComboBoxLabel	39	The label of a non-editable QComboBox.
QStyle::CE_ToolBar	40	A toolbar like QToolBar.
QStyle::CE_ToolBoxTabShape	41	The toolbox's tab shape.
QStyle::CE_ToolBoxTabLabel	42	The toolbox's tab label.
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; see QFrame.

See also 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.

Constant	Value	Description
QStyle::PM_ButtonMargin	0	Amount of whitespace between push button labels and the frame.
QStyle::PM_DockWidgetTitleBarButtonMargin	73	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	Default frame width (usually 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_MdiSubWindowFrameWidth	44	Frame width of an MDI window.
QStyle::PM_MdiSubWindowMinimizedWidth	45	Width of a minimized MDI window.
QStyle::PM_LayoutLeftMargin	75	Default left margin for a QLayout.
QStyle::PM_LayoutTopMargin	76	Default top margin for a QLayout.
QStyle::PM_LayoutRightMargin	77	Default right margin for a QLayout.
QStyle::PM_LayoutBottomMargin	78	Default bottom margin for a QLayout.
QStyle::PM_LayoutHorizontalSpacing	79	Default horizontal spacing for a QLayout.
QStyle::PM_LayoutVerticalSpacing	80	Default vertical spacing for a 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	Length of the slider.
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	70	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	Width of a splitter.
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	59	Default tool bar icon size
QStyle::PM_SmallIconSize	62	Default small icon size
QStyle::PM_LargeIconSize	63	Default large icon size
QStyle::PM_FocusFrameHMargin	65	Horizontal margin that the focus frame will outset the widget by.
QStyle::PM_FocusFrameVMargin	64	Vertical margin that the focus frame will outset the widget by.
QStyle::PM_IconViewIconSize	61	The default size for icons in an icon view.
QStyle::PM_ListViewIconSize	60	The default size for icons in a list view.
QStyle::PM_ToolTipLabelFrameWidth	66	The frame width for a tool tip label.
QStyle::PM_CheckBoxLabelSpacing	67	The spacing between a check box indicator and its label.
QStyle::PM_RadioButtonLabelSpacing	74	The spacing between a radio button indicator and its label.
QStyle::PM_TabBarIconSize	68	The default icon size for a tab bar.
QStyle::PM_SizeGripSize	69	The size of a size grip.
QStyle::PM_MessageBoxIconSize	71	The size of the standard icons in a message box
QStyle::PM_ButtonIconSize	72	The default size of button icons
QStyle::PM_TextCursorWidth	82	The width of the cursor in a line edit or text edit
QStyle::PM_TabBar_ScrollButtonOverlap	81	The distance between the left and right buttons in a tab bar.
QStyle::PM_TabCloseIndicatorWidth	83	The default width of a close button on a tab in a tab bar.
QStyle::PM_TabCloseIndicatorHeight	84	The default height of a close button on a tab in a tab bar.
QStyle::PM_ScrollView_ScrollBarSpacing	85	Distance between frame and scrollbar with SH_ScrollView_FrameOnlyAroundContents set.
QStyle::PM_ScrollView_ScrollBarOverlap	86	Overlap between scroll bars and scroll content
QStyle::PM_SubMenuOverlap	87	The horizontal overlap between a submenu and its parent.
QStyle::PM_TreeViewIndentation	88	The indentation of items in a tree view. This enum value has been introduced in Qt 5.4.
QStyle::PM_HeaderDefaultSectionSizeHorizontal	89	The default size of sections in a horizontal header. This enum value has been introduced in Qt 5.5.
QStyle::PM_HeaderDefaultSectionSizeVertical	90	The default size of sections in a vertical header. This enum value has been introduced in Qt 5.5.
QStyle::PM_TitleBarButtonIconSize	91	The size of button icons on a title bar. This enum value has been introduced in Qt 5.8.
QStyle::PM_TitleBarButtonSize	92	The size of buttons on a title bar. This enum value has been introduced in Qt 5.8.
QStyle::PM_LineEditIconSize	93	The default size for icons in a line edit. This enum value has been introduced in Qt 6.2.
QStyle::PM_CustomBase	0xf0000000	Base value for custom pixel metrics. Custom values must be greater than this value.

See also 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.

Constant	Value	Description
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	Generic focus indicator.
QStyle::PE_IndicatorArrowUp	22	Generic Up arrow.
QStyle::PE_IndicatorArrowDown	19	Generic Down arrow.
QStyle::PE_IndicatorArrowRight	21	Generic Right arrow.
QStyle::PE_IndicatorArrowLeft	20	Generic Left arrow.
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	25	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	7	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, usually 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.

See also drawPrimitive().

enum QStyle::RequestSoftwareInputPanel

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

Constant	Value	Description
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.

See also 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.

Constant	Value	Description
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_DialogYesToAllButton	71	Icon for a standard YesToAll button in a QDialogButtonBox. This enum value was added in Qt 5.14.
QStyle::SP_DialogNoToAllButton	72	Icon for a standard NoToAll button in a QDialogButtonBox. This enum value was added in Qt 5.14.
QStyle::SP_DialogSaveAllButton	73	Icon for a standard SaveAll button in a QDialogButtonBox. This enum value was added in Qt 5.14.
QStyle::SP_DialogAbortButton	74	Icon for a standard Abort button in a QDialogButtonBox. This enum value was added in Qt 5.14.
QStyle::SP_DialogRetryButton	75	Icon for a standard Retry button in a QDialogButtonBox. This enum value was added in Qt 5.14.
QStyle::SP_DialogIgnoreButton	76	Icon for a standard Ignore button in a QDialogButtonBox. This enum value was added in Qt 5.14.
QStyle::SP_RestoreDefaultsButton	77	Icon for a standard RestoreDefaults button in a QDialogButtonBox. This enum value was added in Qt 5.14.
QStyle::SP_CustomBase	0xf0000000	Base value for custom standard pixmaps; custom values must be greater than this value.

See also standardIcon().

enum QStyle::StateFlagflags 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.

Constant	Value	Description
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.

The State type is a typedef for QFlags<StateFlag>. It stores an OR combination of StateFlag values.

See also drawPrimitive().

enum QStyle::StyleHint

This enum describes the available style hints. A style hint is a general look and/or feel hint.

Constant	Value	Description
QStyle::SH_EtchDisabledText	0	Disabled text is "etched" as it is on Windows.
QStyle::SH_DitherDisabledText	1	Disabled text is dithered as it is on Motif.
QStyle::SH_ScrollBar_ContextMenu	62	Whether or not a scroll bar has a context menu.
QStyle::SH_ScrollBar_MiddleClickAbsolutePosition	2	A boolean value. If true, middle clicking on a scroll bar causes the slider to jump to that position. If false, middle clicking is ignored.
QStyle::SH_ScrollBar_LeftClickAbsolutePosition	39	A boolean value. If true, left clicking on a scroll bar causes the slider to jump to that position. If false, left clicking will behave as appropriate for each control.
QStyle::SH_ScrollBar_ScrollWhenPointerLeavesControl	3	A boolean value. If true, when clicking a scroll bar SubControl, holding the mouse button down and moving the pointer outside the SubControl, the scroll bar continues to scroll. If false, the scollbar stops scrolling when the pointer leaves the SubControl.
QStyle::SH_ScrollBar_RollBetweenButtons	63	A boolean value. If true, when clicking a scroll bar button (SC_ScrollBarAddLine or SC_ScrollBarSubLine) and dragging over to the opposite button (rolling) will press the new button and release the old one. When it is false, the original button is released and nothing happens (like a push button).
QStyle::SH_TabBar_Alignment	5	The alignment for tabs in a QTabWidget. Possible values are 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 flags).
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 on Windows, Qt::AlignVCenter otherwise.
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	Allows disabled menu items to be active.
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	Whether popup menus must support scrolling.
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	105	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	106	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	107	Since Qt 5.5. Should other action items be selected when the mouse moves towards a sloppy submenu.
QStyle::SH_Menu_SubMenuSloppyCloseTimeout	108	Since Qt 5.5. The timeout used to close sloppy submenus.
QStyle::SH_Menu_SubMenuResetWhenReenteringParent	109	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	110	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	73	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 scroll 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	The title bar has no border.
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	103	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 RGBA value of the grid for a table.
QStyle::SH_UnderlineShortcut	41	Whether shortcuts are underlined.
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	83	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	The default focus policy for buttons.
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	72	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 variable.
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	Emit the activated signal when the user single clicks on an item in an item in an item view. Otherwise the signal is emitted when the user double clicks on an item.
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 enum.
QStyle::SH_WizardStyle	78	Controls the look and feel of a QWizard. Returns a QWizard::WizardStyle enum.
QStyle::SH_FormLayoutWrapPolicy	85	Provides a default for how rows are wrapped in a QFormLayout. Returns a QFormLayout::RowWrapPolicy enum.
QStyle::SH_FormLayoutFieldGrowthPolicy	88	Provides a default for how fields can grow in a QFormLayout. Returns a QFormLayout::FieldGrowthPolicy enum.
QStyle::SH_FormLayoutFormAlignment	89	Provides a default for how a QFormLayout aligns its contents within the available space. Returns a Qt::Alignment enum.
QStyle::SH_FormLayoutLabelAlignment	90	Provides a default for how a QFormLayout aligns labels within the available space. Returns a Qt::Alignment enum.
QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren	79	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	74	The item view is able to indicate a current item without changing the selection.
QStyle::SH_ToolTip_Mask	75	The mask of a tool tip.
QStyle::SH_FocusFrame_AboveWidget	76	The FocusFrame is stacked above the widget that it is "focusing on".
QStyle::SH_TextControl_FocusIndicatorTextCharFormat	77	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	81	Flash triggered item.
QStyle::SH_Menu_FadeOutOnHide	82	Fade out the menu instead of hiding it immediately.
QStyle::SH_TabWidget_DefaultTabPosition	86	Default position of the tab bar in a tab widget.
QStyle::SH_ToolBar_Movable	87	Determines if the tool bar is movable by default.
QStyle::SH_ItemView_PaintAlternatingRowColorsForEmptyArea	84	Whether QTreeView paints alternating row colors for the area that does not have any items.
QStyle::SH_Menu_Mask	80	The mask for a popup menu.
QStyle::SH_ItemView_DrawDelegateFrame	91	Determines if there should be a frame for a delegate widget.
QStyle::SH_TabBar_CloseButtonPosition	92	Determines the position of the close button on a tab in a tab bar.
QStyle::SH_DockWidget_ButtonsHaveFrame	93	Determines if dockwidget buttons should have frames. Default is true.
QStyle::SH_ToolButtonStyle	94	Determines the default system style for tool buttons that uses Qt::ToolButtonFollowStyle.
QStyle::SH_RequestSoftwareInputPanel	95	Determines when a software input panel should be requested by input widgets. Returns an enum of type QStyle::RequestSoftwareInputPanel.
QStyle::SH_ScrollBar_Transient	96	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	97	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	98	Determines the delay before a tooltip is shown, in milliseconds.
QStyle::SH_ToolTip_FallAsleepDelay	99	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	100	Deprecated. Use SH_Widget_Animation_Duration instead.
QStyle::SH_Splitter_OpaqueResize	101	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	104	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	111	The default vertical and horizontal scroll mode as specified by the style. Can be overridden with QAbstractItemView::setVerticalScrollMode() and QAbstractItemView::setHorizontalScrollMode(). This enum value has been introduced in Qt 5.7.
QStyle::SH_TitleBar_ShowToolTipsOnButtons	112	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	113	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	114	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	115	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	116	Determines which Qt::KeyboardModifier increases the step rate of QAbstractSpinBox. Possible values are Qt::NoModifier, Qt::ControlModifier (default) or Qt::ShiftModifier. Qt::NoModifier disables this feature. This enum value has been introduced in Qt 5.12.
QStyle::SH_TabBar_AllowWheelScrolling	117	Determines if the mouse wheel can be used to cycle through the tabs of a QTabBar. This enum value has been introduced in Qt 6.1.

See also styleHint().

enum QStyle::SubControlflags QStyle::SubControls

This enum describes the available sub controls. A subcontrol is a control element within a complex control (ComplexControl).

Constant	Value	Description
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	Slider handle.
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	Minimize button.
QStyle::SC_TitleBarMaxButton	0x00000004	Maximize button.
QStyle::SC_TitleBarCloseButton	0x00000008	Close button.
QStyle::SC_TitleBarLabel	0x00000100	Window title label.
QStyle::SC_TitleBarNormalButton	0x00000010	Normal (restore) button.
QStyle::SC_TitleBarShadeButton	0x00000020	Shade button.
QStyle::SC_TitleBarUnshadeButton	0x00000040	Unshade button.
QStyle::SC_TitleBarContextHelpButton	0x00000080	Context Help button.
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.

The SubControls type is a typedef for QFlags<SubControl>. It stores an OR combination of SubControl values.

See also 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.

Constant	Value	Description
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	37	Area that counts for the parent layout.
QStyle::SE_PushButtonBevel	56	[since 5.15] Area used for the bevel of the button.
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	38	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	39	Area that counts for the parent layout.
QStyle::SE_SpinBoxLayoutItem	40	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	36	Area that counts for the parent layout.
QStyle::SE_FrameContents	27	Area for a frame's contents.
QStyle::SE_ShapedFrameContents	51	Area for a frame's contents using the shape in QStyleOptionFrame; see QFrame
QStyle::SE_FrameLayoutItem	42	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	35	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	44	Area that counts for the parent layout.
QStyle::SE_ToolBoxTabContents	15	Area for a toolbox tab's icon and label.
QStyle::SE_ToolButtonLayoutItem	41	Area that counts for the parent layout.
QStyle::SE_ItemViewItemCheckIndicator	23	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	55	Area for the tear indicator on the right side of a tab bar with scroll arrows.
QStyle::SE_TabBarScrollLeftButton	53	Area for the scroll left button on a tab bar with scroll buttons.
QStyle::SE_TabBarScrollRightButton	54	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_GroupBoxLayoutItem	43	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	45	Area for a view item's decoration (icon).
QStyle::SE_ItemViewItemText	46	Area for a view item's text.
QStyle::SE_ItemViewItemFocusRect	47	Area for a view item's focus rect.
QStyle::SE_TabBarTabLeftButton	48	Area for a widget on the left side of a tab in a tab bar.
QStyle::SE_TabBarTabRightButton	49	Area for a widget on the right side of a tab in a tab bar.
QStyle::SE_TabBarTabText	50	Area for the text on a tab in a tab bar.
QStyle::SE_ToolBarHandle	52	Area for the handle of a tool bar.

See also subElementRect().

Member Function Documentation

QStyle::QStyle()

Constructs a style object.

[virtual] QStyle::~QStyle()

Destroys the style object.

[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 according to the specified 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 in a layout. orientation specifies whether the controls are laid out side by side or stacked vertically. The option parameter can be used to pass extra information about the parent widget. The widget parameter is optional and can also be used if option is nullptr.

controls1 and controls2 are OR-combination of zero or more control types.

This function is called by the layout system. It is used only if PM_LayoutHorizontalSpacing or PM_LayoutVerticalSpacing returns a negative value.

See also layoutSpacing().

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

Draws the given control using the provided painter with the style options specified by option.

The widget argument is optional and can be used as aid in drawing the control.

The option parameter is a pointer to a QStyleOptionComplex object that can be cast to the correct subclass using the qstyleoption_cast() function. Note that the 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() or drawControl() function.

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.

Complex Control	QStyleOptionComplex Subclass	Style Flag	Remark
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.

See also drawPrimitive() and drawControl().

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

Draws the given element with the provided painter with the style options specified by option.

The widget argument is optional and can be used as aid in drawing the control. The option parameter is a pointer to a QStyleOption object that can be cast to the correct subclass using the qstyleoption_cast() function.

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 object.

Control Element	QStyleOption Subclass	Style Flag	Remark
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.

See also drawPrimitive() and drawComplexControl().

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

Draws the given pixmap in the specified rectangle, according to the specified alignment, using the provided painter.

See also drawItemText().

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

Draws the given text in the specified rectangle using the provided painter and palette.

The text is drawn using the painter's pen, and aligned and wrapped according to the specified alignment. If an explicit textRole is specified, the text is drawn using the palette's color for the given role. The enabled parameter indicates whether or not the item is enabled; when reimplementing this function, the enabled parameter should influence how the item is drawn.

See also Qt::Alignment and drawItemPixmap().

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

Draws the given primitive element with the provided painter using the style options specified by option.

The widget argument is optional and may contain a widget that may aid in drawing the primitive element.

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.

Note that if a primitive element is not listed here, it is because it uses a plain QStyleOption object.

Primitive Element	QStyleOption Subclass	Style Flag	Remark
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).

See also drawComplexControl() and drawControl().

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

Returns a copy of the given pixmap, styled to conform to the specified iconMode and taking into account the palette specified by option.

The option parameter can pass extra information, but it must contain a palette.

Note that not all pixmaps will conform, in which case the returned pixmap is a plain copy.

See also QIcon.

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

Returns the sub control at the given position in the given complex control (with the style options specified by option).

Note that the position is expressed in screen coordinates.

The option argument is a pointer to a QStyleOptionComplex object (or one of its subclasses). The object can be cast to the appropriate type using the qstyleoption_cast() function. See drawComplexControl() for details. The widget argument is optional and can contain additional information for the function.

See also drawComplexControl() and subControlRect().

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

Returns the area within the given rectangle in which to draw the specified pixmap according to the defined alignment.

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

Returns the area within the given rectangle in which to draw the provided text according to the specified font metrics and alignment. The enabled parameter indicates whether or not the associated item is enabled.

If the given rectangle is larger than the area needed to render the text, the rectangle that is returned will be offset within rectangle according to the specified 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.

See also Qt::Alignment.

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

Returns the spacing that should be used between control1 and control2 in a layout. orientation specifies whether the controls are laid out side by side or stacked vertically. The option parameter can be used to pass extra information about the parent widget. The widget parameter is optional and can also be used if option is nullptr.

This function is called by the layout system. It is used only if PM_LayoutHorizontalSpacing or PM_LayoutVerticalSpacing returns a negative value.

See also combinedLayoutSpacing().

[since 6.1] QString QStyle::name() const

Returns the name of the style.

This value can be used to create a style with QStyleFactory::create().

This function was introduced in Qt 6.1.

See also QStyleFactory::create().

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

Returns the value of the given pixel metric.

The specified 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() function. Note that the option may be zero even for PixelMetrics that can make use of it. See the table below for the appropriate option casts:

Pixel Metric	QStyleOption Subclass
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.

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

Initializes the appearance of the given 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.

See also unpolish().

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

This is an overloaded function.

Late initialization of the given application object.

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

This is an overloaded function.

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

See also 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.

[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, based on the provided contentsSize.

The option argument is a pointer to a QStyleOption or one of its subclasses. The option can be cast to the appropriate type using the qstyleoption_cast() function. The widget is an optional argument and can contain extra information used for calculating the size.

See the table below for the appropriate option casts:

Contents Type	QStyleOption Subclass
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

See also ContentsType and QStyleOption.

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

Converts the given logicalValue to a pixel position. The min parameter maps to 0, max maps to span and other values are distributed evenly in-between.

This function can handle the entire integer range without overflow, providing that span is less than 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 parameter to true to reverse this behavior.

See also sliderValueFromPosition().

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

Converts the given pixel position to a logical value. 0 maps to the min parameter, span maps to max and other values are distributed evenly in-between.

This function can handle the entire integer range without overflow.

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 parameter to true to reverse this behavior.

See also sliderPositionFromValue().

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

Returns an icon for the given 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.

[virtual] QPalette QStyle::standardPalette() const

Returns the style's standard palette.

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().

See also 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 for the given 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 class description for details.

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

Returns the rectangle containing the specified subControl of the given complex control (with the style specified by option). The rectangle is defined in screen coordinates.

The option argument is a pointer to QStyleOptionComplex or one of its subclasses, and can be cast to the appropriate type using the qstyleoption_cast() function. See drawComplexControl() for details. The widget is optional and can contain additional information for the function.

See also drawComplexControl().

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

Returns the sub-area for the given element as described in the provided style option. The returned rectangle is defined in screen coordinates.

The widget argument is optional and can be used to aid determining the area. The QStyleOption object can be cast to the appropriate type using the qstyleoption_cast() function. See the table below for the appropriate option casts:

Sub Element	QStyleOption Subclass
SE_PushButtonContents	QStyleOptionButton
SE_PushButtonFocusRect	QStyleOptionButton
SE_PushButtonBevel	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

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

Uninitialize the given widget's appearance.

This function is the counterpart to 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.

See also polish().

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

This is an overloaded function.

Uninitialize the given application.

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

Transforms an alignment of Qt::AlignLeft or Qt::AlignRight without Qt::AlignAbsolute into Qt::AlignLeft or Qt::AlignRight with Qt::AlignAbsolute according to the layout direction. The other alignment flags are left untouched.

If no horizontal alignment was specified, the function returns the default alignment for the given layout direction.

QWidget::layoutDirection

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

Returns the given logicalPosition converted to screen coordinates based on the specified direction. The boundingRectangle is used when performing the translation.

See also QWidget::layoutDirection.

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

Returns the given logicalRectangle converted to screen coordinates based on the specified direction. The boundingRectangle is used when performing the translation.

This function is provided to support right-to-left desktops, and is typically used in implementations of the subControlRect() function.

See also QWidget::layoutDirection.