QStyle Class

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

Header: #include <QStyle>
qmake: QT += widgets
Inherits: QObject
Inherited By:

QCommonStyle

Public Types

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

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 = ..., const QWidget *widget = ...) const = 0
virtual int pixelMetric(QStyle::PixelMetric metric, const QStyleOption *option = nullptr, const QWidget *widget = nullptr) const = 0
virtual void polish(QWidget *widget)
virtual void polish(QApplication *application)
virtual void polish(QPalette &palette)
const QStyle * proxy() const
virtual QSize sizeFromContents(QStyle::ContentsType type, const QStyleOption *option, const QSize &contentsSize, const QWidget *widget = nullptr) const = 0
virtual QIcon standardIcon(QStyle::StandardPixmap standardIcon, const QStyleOption *option = ..., const QWidget *widget = ...) const = 0
virtual QPalette standardPalette() const
virtual int styleHint(QStyle::StyleHint hint, const QStyleOption *option = nullptr, const QWidget *widget = nullptr, QStyleHintReturn *returnData = nullptr) const = 0
virtual QRect subControlRect(QStyle::ComplexControl control, const QStyleOptionComplex *option, QStyle::SubControl subControl, const QWidget *widget = nullptr) const = 0
virtual QRect subElementRect(QStyle::SubElement element, const QStyleOption *option, const QWidget *widget = nullptr) const = 0
virtual void unpolish(QWidget *widget)
virtual void unpolish(QApplication *application)
  • 33 public functions inherited from QObject

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)
  • 10 static public members inherited from QObject

Additional Inherited Members

  • 1 property inherited from QObject
  • 1 public slot inherited from QObject
  • 2 signals inherited from QObject
  • 1 public variable inherited from QObject
  • 9 protected functions inherited from QObject
  • 2 protected variables inherited from QObject

Detailed Description

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

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.

Nine combo boxes

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();
    ~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.

Warning: Qt style sheets are currently not supported for custom QStyle subclasses. We plan to address this in some future release.

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:

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 76 Amount of whitespace between dock widget's title bar button labels and the frame.
QStyle::PM_ButtonDefaultIndicator 1 Width of the default-button indicator frame.
QStyle::PM_MenuButtonIndicator 2 Width of the menu button indicator proportional to the widget height.
QStyle::PM_ButtonShiftHorizontal 3 Horizontal contents shift of a button when the button is down.
QStyle::PM_ButtonShiftVertical 4 Vertical contents shift of a button when the button is down.
QStyle::PM_DefaultFrameWidth 5 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_MDIFrameWidth PM_MdiSubWindowFrameWidth Obsolete. Use PM_MdiSubWindowFrameWidth instead.
QStyle::PM_MdiSubWindowFrameWidth 44 Frame width of an MDI window.
QStyle::PM_MDIMinimizedWidth PM_MdiSubWindowMinimizedWidth Obsolete. Use PM_MdiSubWindowMinimizedWidth instead.
QStyle::PM_MdiSubWindowMinimizedWidth 45 Width of a minimized MDI window.
QStyle::PM_LayoutLeftMargin 78 Default left margin for a QLayout.
QStyle::PM_LayoutTopMargin 79 Default top margin for a QLayout.
QStyle::PM_LayoutRightMargin 80 Default right margin for a QLayout.
QStyle::PM_LayoutBottomMargin 81 Default bottom margin for a QLayout.
QStyle::PM_LayoutHorizontalSpacing 82 Default horizontal spacing for a QLayout.
QStyle::PM_LayoutVerticalSpacing 83 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 73 Margin of the dock window title.
QStyle::PM_MenuBarPanelWidth 33 Frame width of a menu bar, defaults to PM_DefaultFrameWidth.
QStyle::PM_MenuBarItemSpacing 34 Spacing between menu bar items.
QStyle::PM_MenuBarHMargin 36 Spacing between menu bar items and left/right of bar.
QStyle::PM_MenuBarVMargin 35 Spacing between menu bar items and top/bottom of bar.
QStyle::PM_ToolBarFrameWidth 52 Width of the frame around toolbars.
QStyle::PM_ToolBarHandleExtent 53 Width of a toolbar handle in a horizontal toolbar and the height of the handle in a vertical toolbar.
QStyle::PM_ToolBarItemMargin 55 Spacing between the toolbar frame and the items.
QStyle::PM_ToolBarItemSpacing 54 Spacing between toolbar items.
QStyle::PM_ToolBarSeparatorExtent 56 Width of a toolbar separator in a horizontal toolbar and the height of a separator in a vertical toolbar.
QStyle::PM_ToolBarExtensionExtent 57 Width of a toolbar extension button in a horizontal toolbar and the height of the button in a vertical toolbar.
QStyle::PM_TabBarTabOverlap 19 Number of pixels the tabs should overlap. (Currently only used in styles, not inside of QTabBar)
QStyle::PM_TabBarTabHSpace 20 Extra space added to the tab width.
QStyle::PM_TabBarTabVSpace 21 Extra space added to the tab height.
QStyle::PM_TabBarBaseHeight 22 Height of the area between the tab bar and the tab pages.
QStyle::PM_TabBarBaseOverlap 23 Number of pixels the tab bar overlaps the tab bar base.
QStyle::PM_TabBarScrollButtonWidth 51  
QStyle::PM_TabBarTabShiftHorizontal 49 Horizontal pixel shift when a tab is selected.
QStyle::PM_TabBarTabShiftVertical 50 Vertical pixel shift when a tab is selected.
QStyle::PM_ProgressBarChunkWidth 24 Width of a chunk in a progress bar indicator.
QStyle::PM_SplitterWidth 25 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 62 Default tool bar icon size
QStyle::PM_SmallIconSize 65 Default small icon size
QStyle::PM_LargeIconSize 66 Default large icon size
QStyle::PM_FocusFrameHMargin 68 Horizontal margin that the focus frame will outset the widget by.
QStyle::PM_FocusFrameVMargin 67 Vertical margin that the focus frame will outset the widget by.
QStyle::PM_IconViewIconSize 64 The default size for icons in an icon view.
QStyle::PM_ListViewIconSize 63 The default size for icons in a list view.
QStyle::PM_ToolTipLabelFrameWidth 69 The frame width for a tool tip label.
QStyle::PM_CheckBoxLabelSpacing 70 The spacing between a check box indicator and its label.
QStyle::PM_RadioButtonLabelSpacing 77 The spacing between a radio button indicator and its label.
QStyle::PM_TabBarIconSize 71 The default icon size for a tab bar.
QStyle::PM_SizeGripSize 72 The size of a size grip.
QStyle::PM_MessageBoxIconSize 74 The size of the standard icons in a message box
QStyle::PM_ButtonIconSize 75 The default size of button icons
QStyle::PM_TextCursorWidth 85 The width of the cursor in a line edit or text edit
QStyle::PM_TabBar_ScrollButtonOverlap 84 The distance between the left and right buttons in a tab bar.
QStyle::PM_TabCloseIndicatorWidth 86 The default width of a close button on a tab in a tab bar.
QStyle::PM_TabCloseIndicatorHeight 87 The default height of a close button on a tab in a tab bar.
QStyle::PM_ScrollView_ScrollBarSpacing 88 Distance between frame and scrollbar with SH_ScrollView_FrameOnlyAroundContents set.
QStyle::PM_ScrollView_ScrollBarOverlap 89 Overlap between scroll bars and scroll content
QStyle::PM_SubMenuOverlap 90 The horizontal overlap between a submenu and its parent.
QStyle::PM_TreeViewIndentation 91 The indentation of items in a tree view. This enum value has been introduced in Qt 5.4.
QStyle::PM_HeaderDefaultSectionSizeHorizontal 92 The default size of sections in a horizontal header. This enum value has been introduced in Qt 5.5.
QStyle::PM_HeaderDefaultSectionSizeVertical 93 The default size of sections in a vertical header. This enum value has been introduced in Qt 5.5.
QStyle::PM_TitleBarButtonIconSize 94 The size of button icons on a title bar. This enum value has been introduced in Qt 5.8.
QStyle::PM_TitleBarButtonSize 95 The size of buttons on a title bar. This enum value has been introduced in Qt 5.8.
QStyle::PM_CustomBase 0xf0000000 Base value for custom pixel metrics. Custom values must be greater than this value.

The following values are obsolete:

Constant Value Description
QStyle::PM_DefaultTopLevelMargin 59 Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead.
QStyle::PM_DefaultChildMargin 60 Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead.
QStyle::PM_DefaultLayoutSpacing 61 Use PM_LayoutHorizontalSpacing and PM_LayoutVerticalSpacing instead.

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

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_CustomBase 0xf0000000 Base value for custom standard pixmaps; custom values must be greater than this value.

See also standardIcon().

enum QStyle::StateFlag
flags QStyle::State

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

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

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 106 Since Qt 5.5. If the cursor has to move towards the submenu (like it is on macOS), or if the cursor can move in any direction as long as it reaches the submenu before the sloppy timeout.
QStyle::SH_Menu_SubMenuUniDirectionFailCount 107 Since Qt 5.5. When SH_Menu_SubMenuUniDirection is defined this enum defines the number of failed mouse moves before the sloppy submenu is discarded. This can be used to control the "strictness" of the uni direction algorithm.
QStyle::SH_Menu_SubMenuSloppySelectOtherActions 108 Since Qt 5.5. Should other action items be selected when the mouse moves towards a sloppy submenu.
QStyle::SH_Menu_SubMenuSloppyCloseTimeout 109 Since Qt 5.5. The timeout used to close sloppy submenus.
QStyle::SH_Menu_SubMenuResetWhenReenteringParent 110 Since Qt 5.5. When entering parent from child submenu, should the sloppy state be reset, effectively closing the child and making the current submenu active.
QStyle::SH_Menu_SubMenuDontStartSloppyOnLeave 111 Since Qt 5.5. Do not start sloppy timers when the mouse leaves a sub-menu.
QStyle::SH_ScrollView_FrameOnlyAroundContents 17 Whether scrollviews draw their frame only around contents (like Motif), or around contents, scroll bars and corner widgets (like Windows).
QStyle::SH_MenuBar_AltKeyNavigation 18 Menu bars items are navigable by pressing Alt, followed by using the arrow keys to select the desired item.
QStyle::SH_ComboBox_ListMouseTracking 19 Mouse tracking in combobox drop-down lists.
QStyle::SH_Menu_MouseTracking 20 Mouse tracking in popup menus.
QStyle::SH_MenuBar_MouseTracking 21 Mouse tracking in menu bars.
QStyle::SH_Menu_FillScreenWithScroll 45 Whether scrolling popups should fill the screen as they are scrolled.
QStyle::SH_Menu_SelectionWrap 74 Whether popups should allow the selections to wrap, that is when selection should the next item be the first item.
QStyle::SH_ItemView_ChangeHighlightOnFocus 22 Gray out selected items when losing focus.
QStyle::SH_Widget_ShareActivation 23 Turn on sharing activation with floating modeless dialogs.
QStyle::SH_TabBar_SelectMouseType 4 Which type of mouse event should cause a tab to be selected.
QStyle::SH_ListViewExpand_SelectMouseType 40 Which type of mouse event should cause a list view expansion to be selected.
QStyle::SH_TabBar_PreferNoArrows 38 Whether a tab bar should suggest a size to prevent scoll arrows.
QStyle::SH_ComboBox_Popup 25 Allows popups as a combobox drop-down menu.
QStyle::SH_Workspace_FillSpaceOnMaximize 24 The workspace should maximize the client area.
QStyle::SH_TitleBar_NoBorder 26 The title bar has no border.
QStyle::SH_ScrollBar_StopMouseOverSlider SH_Slider_StopMouseOverSlider Obsolete. Use SH_Slider_StopMouseOverSlider instead.
QStyle::SH_Slider_StopMouseOverSlider 27 Stops auto-repeat when the slider reaches the mouse position.
QStyle::SH_BlinkCursorWhenTextSelected 28 Whether cursor should blink when text is selected.
QStyle::SH_RichText_FullWidthSelection 29 Whether richtext selections should extend to the full width of the document.
QStyle::SH_GroupBox_TextLabelVerticalAlignment 31 How to vertically align a group box's text label.
QStyle::SH_GroupBox_TextLabelColor 32 How to paint a group box's text label.
QStyle::SH_DialogButtons_DefaultButton 36 Which button gets the default status in a dialog's button widget.
QStyle::SH_ToolBox_SelectedPageTitleBold 37 Boldness of the selected page title in a QToolBox.
QStyle::SH_LineEdit_PasswordCharacter 35 The Unicode character to be used for passwords.
QStyle::SH_LineEdit_PasswordMaskDelay 104 Determines the delay before visible character is masked with password character, in milliseconds. This enum value was added in Qt 5.4.
QStyle::SH_Table_GridLineColor 34 The RGB value of the grid for a table.
QStyle::SH_UnderlineShortcut 41 Whether shortcuts are underlined.
QStyle::SH_SpellCheckUnderlineStyle 72 Obsolete. Use SpellCheckUnderlineStyle hint in QPlatformTheme instead.
QStyle::SH_SpinBox_AnimateButton 42 Animate a click when up or down is pressed in a spin box.
QStyle::SH_SpinBox_KeyPressAutoRepeatRate 43 Auto-repeat interval for spinbox key presses.
QStyle::SH_SpinBox_ClickAutoRepeatRate 44 Auto-repeat interval for spinbox mouse clicks.
QStyle::SH_SpinBox_ClickAutoRepeatThreshold 84 Auto-repeat threshold for spinbox mouse clicks.
QStyle::SH_ToolTipLabel_Opacity 46 An integer indicating the opacity for the tip label, 0 is completely transparent, 255 is completely opaque.
QStyle::SH_DrawMenuBarSeparator 47 Indicates whether or not the menu bar draws separators.
QStyle::SH_TitleBar_ModifyNotification 48 Indicates if the title bar should show a '*' for windows that are modified.
QStyle::SH_Button_FocusPolicy 49 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 73 A boolean indicating whether the buttons in the message box should be centered or not (see QDialogButtonBox::setCentered()).
QStyle::SH_MessageBox_TextInteractionFlags 70 A boolean indicating if the text in a message box should allow user interfactions (e.g. selection) or not.
QStyle::SH_TitleBar_AutoRaise 51 A boolean indicating whether controls on a title bar ought to update when the mouse is over them.
QStyle::SH_ToolButton_PopupDelay 52 An int indicating the popup delay in milliseconds for menus attached to tool buttons.
QStyle::SH_FocusFrame_Mask 53 The mask of the focus frame.
QStyle::SH_RubberBand_Mask 54 The mask of the rubber band.
QStyle::SH_WindowFrame_Mask 55 The mask of the window frame.
QStyle::SH_SpinControls_DisableOnBounds 56 Determines if the spin controls will shown as disabled when reaching the spin range boundary.
QStyle::SH_Dial_BackgroundRole 57 Defines the style's preferred background role (as QPalette::ColorRole) for a dial widget.
QStyle::SH_ComboBox_LayoutDirection 58 The layout direction for the combo box. By default it should be the same as indicated by the QStyleOption::direction 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 79 Controls the look and feel of a QWizard. Returns a QWizard::WizardStyle enum.
QStyle::SH_FormLayoutWrapPolicy 86 Provides a default for how rows are wrapped in a QFormLayout. Returns a QFormLayout::RowWrapPolicy enum.
QStyle::SH_FormLayoutFieldGrowthPolicy 89 Provides a default for how fields can grow in a QFormLayout. Returns a QFormLayout::FieldGrowthPolicy enum.
QStyle::SH_FormLayoutFormAlignment 90 Provides a default for how a QFormLayout aligns its contents within the available space. Returns a Qt::Alignment enum.
QStyle::SH_FormLayoutLabelAlignment 91 Provides a default for how a QFormLayout aligns labels within the available space. Returns a Qt::Alignment enum.
QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren 80 Controls whether the tree view will select the first child when it is exapanded and the right arrow key is pressed.
QStyle::SH_ComboBox_PopupFrameStyle 69 The frame style used when drawing a combobox popup menu.
QStyle::SH_DialogButtonBox_ButtonsHaveIcons 71 Indicates whether or not StandardButtons in QDialogButtonBox should have icons or not.
QStyle::SH_ItemView_MovementWithoutUpdatingSelection 75 The item view is able to indicate a current item without changing the selection.
QStyle::SH_ToolTip_Mask 76 The mask of a tool tip.
QStyle::SH_FocusFrame_AboveWidget 77 The FocusFrame is stacked above the widget that it is "focusing on".
QStyle::SH_TextControl_FocusIndicatorTextCharFormat 78 Specifies the text format used to highlight focused anchors in rich text documents displayed for example in QTextBrowser. The format has to be a QTextCharFormat returned in the variant of the QStyleHintReturnVariant return value. The QTextFormat::OutlinePen property is used for the outline and QTextFormat::BackgroundBrush for the background of the highlighted area.
QStyle::SH_Menu_FlashTriggeredItem 82 Flash triggered item.
QStyle::SH_Menu_FadeOutOnHide 83 Fade out the menu instead of hiding it immediately.
QStyle::SH_TabWidget_DefaultTabPosition 87 Default position of the tab bar in a tab widget.
QStyle::SH_ToolBar_Movable 88 Determines if the tool bar is movable by default.
QStyle::SH_ItemView_PaintAlternatingRowColorsForEmptyArea 85 Whether QTreeView paints alternating row colors for the area that does not have any items.
QStyle::SH_Menu_Mask 81 The mask for a popup menu.
QStyle::SH_ItemView_DrawDelegateFrame 92 Determines if there should be a frame for a delegate widget.
QStyle::SH_TabBar_CloseButtonPosition 93 Determines the position of the close button on a tab in a tab bar.
QStyle::SH_DockWidget_ButtonsHaveFrame 94 Determines if dockwidget buttons should have frames. Default is true.
QStyle::SH_ToolButtonStyle 95 Determines the default system style for tool buttons that uses Qt::ToolButtonFollowStyle.
QStyle::SH_RequestSoftwareInputPanel 96 Determines when a software input panel should be requested by input widgets. Returns an enum of type QStyle::RequestSoftwareInputPanel.
QStyle::SH_ScrollBar_Transient 97 Determines if the style supports transient scroll bars. Transient scroll bars appear when the content is scrolled and disappear when they are no longer needed.
QStyle::SH_Menu_SupportsSections 98 Determines if the style displays sections in menus or treat them as plain separators. Sections are separators with a text and icon hint.
QStyle::SH_ToolTip_WakeUpDelay 99 Determines the delay before a tooltip is shown, in milliseconds.
QStyle::SH_ToolTip_FallAsleepDelay 100 Determines the delay (in milliseconds) before a new wake time is needed when a tooltip is shown (notice: shown, not hidden). When a new wake isn't needed, a user-requested tooltip will be shown nearly instantly.
QStyle::SH_Widget_Animate 101 Deprecated. Use SH_Widget_Animation_Duration instead.
QStyle::SH_Splitter_OpaqueResize 102 Determines if resizing is opaque This enum value has been introduced in Qt 5.2
QStyle::SH_TabBar_ChangeCurrentDelay 105 Determines the delay before the current tab is changed while dragging over the tabbar, in milliseconds. This enum value has been introduced in Qt 5.4
QStyle::SH_ItemView_ScrollMode 112 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 113 Determines if tool tips are shown on window title bar buttons. The Mac style, for example, sets this to false. This enum value has been introduced in Qt 5.10.
QStyle::SH_Widget_Animation_Duration 114 Determines how much an animation should last (in ms). A value equal to zero means that the animations will be disabled. This enum value has been introduced in Qt 5.10.
QStyle::SH_ComboBox_AllowWheelScrolling 115 Determines if the mouse wheel can be used to scroll inside a QComboBox. This is on by default in all styles except the Mac style. This enum value has been introduced in Qt 5.10.
QStyle::SH_SpinBox_ButtonsInsideFrame 116 Determnines if the spin box buttons are inside the line edit frame. This enum value has been introduced in Qt 5.11.

See also styleHint().

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

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 0.

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.

This function was introduced in Qt 4.3.

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 = ..., const QWidget *widget = ...) 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 0.

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

This function was introduced in Qt 4.3.

See also combinedLayoutSpacing().

[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:

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.

This function was introduced in Qt 4.6.

[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:

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 = ..., const QWidget *widget = ...) 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.

This function was introduced in Qt 4.1.

[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:

[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.

Voted #1 for:

  • Easiest to learn
  • Most time saving
  • Best support

Develop Cross-Platform Apps and Games 50% Faster!

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cross platform
native performance
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game network
multiplayer
level editor
easiest to learn
biggest time saving
best support