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QStyle Class Reference
[QtGui module]

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

 #include <QStyle>

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_Q3DockWindow, CT_HeaderSection, ..., CT_MdiControls }
  • enum ControlElement { CE_PushButton, CE_PushButtonBevel, CE_PushButtonLabel, CE_DockWidgetTitle, ..., CE_HeaderEmptyArea }
  • enum PixelMetric { PM_ButtonMargin, PM_DockWidgetTitleBarButtonMargin, PM_ButtonDefaultIndicator, PM_MenuButtonIndicator, ..., PM_DefaultLayoutSpacing }
  • enum PrimitiveElement { PE_PanelButtonCommand, PE_FrameDefaultButton, PE_PanelButtonBevel, PE_PanelButtonTool, ..., PE_CustomBase }
  • enum StandardPixmap { SP_TitleBarMinButton, SP_TitleBarMenuButton, SP_TitleBarMaxButton, SP_TitleBarCloseButton, ..., SP_CustomBase }
  • flags State
  • enum StateFlag { State_None, State_Active, State_AutoRaise, State_Bottom, ..., State_Window }
  • enum StyleHint { SH_EtchDisabledText, SH_DitherDisabledText, SH_GUIStyle, SH_ScrollBar_ContextMenu, ..., SH_TextControl_FocusIndicatorTextCharFormat }
  • 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_ComboBoxLayoutItem }

Public Functions

  • QStyle ()
  • virtual ~QStyle ()
  • int combinedLayoutSpacing ( QSizePolicy::ControlTypes controls1, QSizePolicy::ControlTypes controls2, Qt::Orientation orientation, QStyleOption * option = 0, QWidget * widget = 0 ) const
  • virtual void drawComplexControl ( ComplexControl control, const QStyleOptionComplex * option, QPainter * painter, const QWidget * widget = 0 ) const = 0
  • virtual void drawControl ( ControlElement element, const QStyleOption * option, QPainter * painter, const QWidget * widget = 0 ) 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 ( PrimitiveElement element, const QStyleOption * option, QPainter * painter, const QWidget * widget = 0 ) const = 0
  • virtual QPixmap generatedIconPixmap ( QIcon::Mode iconMode, const QPixmap & pixmap, const QStyleOption * option ) const = 0
  • virtual SubControl hitTestComplexControl ( ComplexControl control, const QStyleOptionComplex * option, const QPoint & position, const QWidget * widget = 0 ) 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
  • int layoutSpacing ( QSizePolicy::ControlType control1, QSizePolicy::ControlType control2, Qt::Orientation orientation, const QStyleOption * option = 0, const QWidget * widget = 0 ) const
  • virtual int pixelMetric ( PixelMetric metric, const QStyleOption * option = 0, const QWidget * widget = 0 ) const = 0
  • virtual void polish ( QWidget * widget )
  • virtual void polish ( QApplication * application )
  • virtual void polish ( QPalette & palette )
  • virtual QSize sizeFromContents ( ContentsType type, const QStyleOption * option, const QSize & contentsSize, const QWidget * widget = 0 ) const = 0
  • QIcon standardIcon ( StandardPixmap standardIcon, const QStyleOption * option = 0, const QWidget * widget = 0 ) const
  • virtual QPalette standardPalette () const
  • virtual int styleHint ( StyleHint hint, const QStyleOption * option = 0, const QWidget * widget = 0, QStyleHintReturn * returnData = 0 ) const = 0
  • virtual QRect subControlRect ( ComplexControl control, const QStyleOptionComplex * option, SubControl subControl, const QWidget * widget = 0 ) const = 0
  • virtual QRect subElementRect ( SubElement element, const QStyleOption * option, const QWidget * widget = 0 ) const = 0
  • virtual void unpolish ( QWidget * widget )
  • virtual void unpolish ( QApplication * application )
  • 29 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 )
  • 5 static public members inherited from QObject

Protected Slots

  • int layoutSpacingImplementation ( QSizePolicy::ControlType control1, QSizePolicy::ControlType control2, Qt::Orientation orientation, const QStyleOption * option = 0, const QWidget * widget = 0 ) const
  • QIcon standardIconImplementation ( StandardPixmap standardIcon, const QStyleOption * option = 0, const QWidget * widget = 0 ) const

Additional Inherited Members

  • 1 property inherited from QObject
  • 1 public slot inherited from QObject
  • 1 signal inherited from QObject
  • 7 protected functions 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, QMotifStyle, etc.). By default, these styles are built into the QtGui library. 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 six different styles.

Six 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 motif

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 Mac OS X), 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

If you want to design a custom look and feel for your application, the first step is to pick one of the base styles provided with Qt to build your custom style from. The choice will depend on which existing style resembles your style the most.

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 QWindowsStyle
 {
     Q_OBJECT

 public:
     CustomStyle()
     ~CustomStyle() {}

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

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 {
         QWindowsStyle::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:

     QSpinBox *spinBox = qobject_cast<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 call the QApplication::setStyle() static function before creating the QApplication object:

 #include <QtGui>

 #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 style available for use in other applications, some of which may not be yours and are 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:

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

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.

ConstantValueDescription
QStyle::CC_SpinBox0A spinbox, like QSpinBox.
QStyle::CC_ComboBox1A combobox, like QComboBox.
QStyle::CC_ScrollBar2A scroll bar, like QScrollBar.
QStyle::CC_Slider3A slider, like QSlider.
QStyle::CC_ToolButton4A tool button, like QToolButton.
QStyle::CC_TitleBar5A Title bar, like those used in QWorkspace.
QStyle::CC_Q3ListView6Used for drawing the Q3ListView class.
QStyle::CC_GroupBox8A group box, like QGroupBox.
QStyle::CC_Dial7A dial, like QDial.
QStyle::CC_MdiControls9The minimize, close, and normal button in the menu bar for a maximized MDI subwindow.
QStyle::CC_CustomBase0xf0000000Base 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.

ConstantValueDescription
QStyle::CT_CheckBox1A check box, like QCheckBox.
QStyle::CT_ComboBox4A combo box, like QComboBox.
QStyle::CT_Q3DockWindow6A Q3DockWindow.
QStyle::CT_HeaderSection21A header section, like QHeader.
QStyle::CT_LineEdit16A line edit, like QLineEdit.
QStyle::CT_Menu11A menu, like QMenu.
QStyle::CT_Q3Header15A Qt 3 header section, like Q3Header.
QStyle::CT_MenuBar10A menu bar, like QMenuBar.
QStyle::CT_MenuBarItem9A menu bar item, like the buttons in a QMenuBar.
QStyle::CT_MenuItem8A menu item, like QMenuItem.
QStyle::CT_ProgressBar7A progress bar, like QProgressBar.
QStyle::CT_PushButton0A push button, like QPushButton.
QStyle::CT_RadioButton2A radio button, like QRadioButton.
QStyle::CT_SizeGrip18A size grip, like QSizeGrip.
QStyle::CT_Slider13A slider, like QSlider.
QStyle::CT_ScrollBar14A scroll bar, like QScrollBar.
QStyle::CT_SpinBox17A spin box, like QSpinBox.
QStyle::CT_Splitter5A splitter, like QSplitter.
QStyle::CT_TabBarTab12A tab on a tab bar, like QTabBar.
QStyle::CT_TabWidget19A tab widget, like QTabWidget.
QStyle::CT_ToolButton3A tool button, like QToolButton.
QStyle::CT_GroupBox22A group box, like QGroupBox.
QStyle::CT_CustomBase0xf0000000Base value for custom contents types. Custom values must be greater than this value.
QStyle::CT_MdiControls23The 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.

ConstantValueDescription
QStyle::CE_PushButton0A QPushButton, draws CE_PushButtonBevel, CE_PushButtonLabel and PE_FrameFocusRect.
QStyle::CE_PushButtonBevel1The bevel and default indicator of a QPushButton.
QStyle::CE_PushButtonLabel2The label (an icon with text or pixmap) of a QPushButton.
QStyle::CE_DockWidgetTitle31Dock window title.
QStyle::CE_Splitter29Splitter handle; see also QSplitter.
QStyle::CE_CheckBox3A QCheckBox, draws a PE_IndicatorCheckBox, a CE_CheckBoxLabel and a PE_FrameFocusRect.
QStyle::CE_CheckBoxLabel4The label (text or pixmap) of a QCheckBox.
QStyle::CE_RadioButton5A QRadioButton, draws a PE_IndicatorRadioButton, a CE_RadioButtonLabel and a PE_FrameFocusRect.
QStyle::CE_RadioButtonLabel6The label (text or pixmap) of a QRadioButton.
QStyle::CE_TabBarTab7The tab and label within a QTabBar.
QStyle::CE_TabBarTabShape8The tab shape within a tab bar.
QStyle::CE_TabBarTabLabel9The label within a tab.
QStyle::CE_ProgressBar10A QProgressBar, draws CE_ProgressBarGroove, CE_ProgressBarContents and CE_ProgressBarLabel.
QStyle::CE_ProgressBarGroove11The groove where the progress indicator is drawn in a QProgressBar.
QStyle::CE_ProgressBarContents12The progress indicator of a QProgressBar.
QStyle::CE_ProgressBarLabel13The text label of a QProgressBar.
QStyle::CE_ToolButtonLabel22A tool button's label.
QStyle::CE_MenuBarItem20A menu item in a QMenuBar.
QStyle::CE_MenuBarEmptyArea21The empty area of a QMenuBar.
QStyle::CE_MenuItem14A menu item in a QMenu.
QStyle::CE_MenuScroller15Scrolling areas in a QMenu when the style supports scrolling.
QStyle::CE_MenuTearoff18A menu item representing the tear off section of a QMenu.
QStyle::CE_MenuEmptyArea19The area in a menu without menu items.
QStyle::CE_MenuHMargin17The horizontal extra space on the left/right of a menu.
QStyle::CE_MenuVMargin16The vertical extra space on the top/bottom of a menu.
QStyle::CE_Q3DockWindowEmptyArea26The empty area of a QDockWidget.
QStyle::CE_ToolBoxTab27The toolbox's tab and label within a QToolBox.
QStyle::CE_SizeGrip28Window resize handle; see also QSizeGrip.
QStyle::CE_Header23A header.
QStyle::CE_HeaderSection24A header section.
QStyle::CE_HeaderLabel25The header's label.
QStyle::CE_ScrollBarAddLine32Scroll bar line increase indicator. (i.e., scroll down); see also QScrollBar.
QStyle::CE_ScrollBarSubLine33Scroll bar line decrease indicator (i.e., scroll up).
QStyle::CE_ScrollBarAddPage34Scolllbar page increase indicator (i.e., page down).
QStyle::CE_ScrollBarSubPage35Scroll bar page decrease indicator (i.e., page up).
QStyle::CE_ScrollBarSlider36Scroll bar slider.
QStyle::CE_ScrollBarFirst37Scroll bar first line indicator (i.e., home).
QStyle::CE_ScrollBarLast38Scroll bar last line indicator (i.e., end).
QStyle::CE_RubberBand30Rubber band used in for example an icon view.
QStyle::CE_FocusFrame39Focus frame that is style controlled.
QStyle::CE_CustomBase0xf0000000Base value for custom control elements; custom values must be greater than this value.
QStyle::CE_ComboBoxLabel40The label of a non-editable QComboBox.
QStyle::CE_ToolBar41A toolbar like QToolBar.
QStyle::CE_ToolBoxTabShape42The toolbox's tab shape.
QStyle::CE_ToolBoxTabLabel43The toolbox's tab label.
QStyle::CE_HeaderEmptyArea44The area of a header view where there are no header sections.

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.

ConstantValueDescription
QStyle::PM_ButtonMargin0Amount of whitespace between push button labels and the frame.
QStyle::PM_DockWidgetTitleBarButtonMargin?Amount of whitespace between dock widget's title bar button labels and the frame.
QStyle::PM_ButtonDefaultIndicator1Width of the default-button indicator frame.
QStyle::PM_MenuButtonIndicator2Width of the menu button indicator proportional to the widget height.
QStyle::PM_ButtonShiftHorizontal3Horizontal contents shift of a button when the button is down.
QStyle::PM_ButtonShiftVertical4Vertical contents shift of a button when the button is down.
QStyle::PM_DefaultFrameWidth5Default frame width (usually 2).
QStyle::PM_SpinBoxFrameWidth6Frame width of a spin box, defaults to PM_DefaultFrameWidth.
QStyle::PM_ComboBoxFrameWidth7Frame width of a combo box, defaults to PM_DefaultFrameWidth.
QStyle::PM_MDIFrameWidthPM_MdiSubWindowFrameWidthObsolete. Use PM_MdiSubWindowFrameWidth instead.
QStyle::PM_MdiSubWindowFrameWidth46Frame width of an MDI window.
QStyle::PM_MDIMinimizedWidthPM_MdiSubWindowMinimizedWidthObsolete. Use PM_MdiSubWindowMinimizedWidth instead.
QStyle::PM_MdiSubWindowMinimizedWidth?Width of a minimized MDI window.
QStyle::PM_LayoutLeftMargin?Default left margin for a QLayout.
QStyle::PM_LayoutTopMargin?Default top margin for a QLayout.
QStyle::PM_LayoutRightMargin?Default right margin for a QLayout.
QStyle::PM_LayoutBottomMargin?Default bottom margin for a QLayout.
QStyle::PM_LayoutHorizontalSpacing?Default horizontal spacing for a QLayout.
QStyle::PM_LayoutVerticalSpacing?Default vertical spacing for a QLayout.
QStyle::PM_MaximumDragDistance8The maximum allowed distance between the mouse and a slider 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_ScrollBarExtent9Width of a vertical scroll bar and the height of a horizontal scroll bar.
QStyle::PM_ScrollBarSliderMin10The minimum height of a vertical scroll bar's slider and the minimum width of a horizontal scroll bar's slider.
QStyle::PM_SliderThickness11Total slider thickness.
QStyle::PM_SliderControlThickness12Thickness of the slider handle.
QStyle::PM_SliderLength13Length of the slider.
QStyle::PM_SliderTickmarkOffset14The offset between the tickmarks and the slider.
QStyle::PM_SliderSpaceAvailable15The available space for the slider to move.
QStyle::PM_DockWidgetSeparatorExtent16Width of a separator in a horizontal dock window and the height of a separator in a vertical dock window.
QStyle::PM_DockWidgetHandleExtent17Width of the handle in a horizontal dock window and the height of the handle in a vertical dock window.
QStyle::PM_DockWidgetFrameWidth18Frame width of a dock window.
QStyle::PM_DockWidgetTitleMargin?Margin of the dock window title.
QStyle::PM_MenuBarPanelWidth33Frame width of a menu bar, defaults to PM_DefaultFrameWidth.
QStyle::PM_MenuBarItemSpacing34Spacing between menu bar items.
QStyle::PM_MenuBarHMargin36Spacing between menu bar items and left/right of bar.
QStyle::PM_MenuBarVMargin35Spacing between menu bar items and top/bottom of bar.
QStyle::PM_ToolBarFrameWidth?Width of the frame around toolbars.
QStyle::PM_ToolBarHandleExtent?Width of a toolbar handle in a horizontal toolbar and the height of the handle in a vertical toolbar.
QStyle::PM_ToolBarItemMargin?Spacing between the toolbar frame and the items.
QStyle::PM_ToolBarItemSpacing?Spacing between toolbar items.
QStyle::PM_ToolBarSeparatorExtent?Width of a toolbar separator in a horizontal toolbar and the height of a separator in a vertical toolbar.
QStyle::PM_ToolBarExtensionExtent?Width of a toolbar extension button in a horizontal toolbar and the height of the button in a vertical toolbar.
QStyle::PM_TabBarTabOverlap19Number of pixels the tabs should overlap. (Currently only used in styles, not inside of QTabBar)
QStyle::PM_TabBarTabHSpace20Extra space added to the tab width.
QStyle::PM_TabBarTabVSpace21Extra space added to the tab height.
QStyle::PM_TabBarBaseHeight22Height of the area between the tab bar and the tab pages.
QStyle::PM_TabBarBaseOverlap23Number of pixels the tab bar overlaps the tab bar base.
QStyle::PM_TabBarScrollButtonWidth? 
QStyle::PM_TabBarTabShiftHorizontal?Horizontal pixel shift when a tab is selected.
QStyle::PM_TabBarTabShiftVertical?Vertical pixel shift when a tab is selected.
QStyle::PM_ProgressBarChunkWidth24Width of a chunk in a progress bar indicator.
QStyle::PM_SplitterWidth25Width of a splitter.
QStyle::PM_TitleBarHeight26Height of the title bar.
QStyle::PM_IndicatorWidth37Width of a check box indicator.
QStyle::PM_IndicatorHeight38Height of a checkbox indicator.
QStyle::PM_ExclusiveIndicatorWidth39Width of a radio button indicator.
QStyle::PM_ExclusiveIndicatorHeight40Height of a radio button indicator.
QStyle::PM_MenuPanelWidth30Border width (applied on all sides) for a QMenu.
QStyle::PM_MenuHMargin28Additional border (used on left and right) for a QMenu.
QStyle::PM_MenuVMargin29Additional border (used for bottom and top) for a QMenu.
QStyle::PM_MenuScrollerHeight27Height of the scroller area in a QMenu.
QStyle::PM_MenuTearoffHeight31Height of a tear off area in a QMenu.
QStyle::PM_MenuDesktopFrameWidth32The frame width for the menu on the desktop.
QStyle::PM_CheckListButtonSize41Area (width/height) of the checkbox/radio button in a Q3CheckListItem.
QStyle::PM_CheckListControllerSize42Area (width/height) of the controller in a Q3CheckListItem.
QStyle::PM_DialogButtonsSeparator43Distance between buttons in a dialog buttons widget.
QStyle::PM_DialogButtonsButtonWidth44Minimum width of a button in a dialog buttons widget.
QStyle::PM_DialogButtonsButtonHeight45Minimum height of a button in a dialog buttons widget.
QStyle::PM_HeaderMarkSize?The size of the sort indicator in a header.
QStyle::PM_HeaderGripMargin?The size of the resize grip in a header.
QStyle::PM_HeaderMargin?The size of the margin between the sort indicator and the text.
QStyle::PM_SpinBoxSliderHeight?The height of the optional spin box slider.
QStyle::PM_ToolBarIconSize?Default tool bar icon size
QStyle::PM_SmallIconSize?Default small icon size
QStyle::PM_LargeIconSize?Default large icon size
QStyle::PM_FocusFrameHMargin?Horizontal margin that the focus frame will outset the widget by.
QStyle::PM_FocusFrameVMargin?Vertical margin that the focus frame will outset the widget by.
QStyle::PM_IconViewIconSize?The default size for icons in an icon view.
QStyle::PM_ListViewIconSize?The default size for icons in a list view.
QStyle::PM_ToolTipLabelFrameWidth?The frame width for a tool tip label.
QStyle::PM_CheckBoxLabelSpacing?The spacing between a check box indicator and its label.
QStyle::PM_RadioButtonLabelSpacing?The spacing between a radio button indicator and its label.
QStyle::PM_TabBarIconSize?The default icon size for a tab bar.
QStyle::PM_SizeGripSize?The size of a size grip.
QStyle::PM_MessageBoxIconSize?The size of the standard icons in a message box
QStyle::PM_ButtonIconSize?The default size of button icons
QStyle::PM_CustomBase0xf0000000Base value for custom pixel metrics. Custom values must be greater than this value.

The following values are obsolete:

ConstantValueDescription
QStyle::PM_DefaultTopLevelMargin?Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead.
QStyle::PM_DefaultChildMargin?Use PM_LayoutLeftMargin, PM_LayoutTopMargin, PM_LayoutRightMargin, and PM_LayoutBottomMargin instead.
QStyle::PM_DefaultLayoutSpacing?Use PM_LayoutHorizontalSpacing and PM_LayoutVerticalSpacing instead.

See also pixelMetric().

enum QStyle::PrimitiveElement

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

ConstantValueDescription
QStyle::PE_PanelButtonCommand18Button used to initiate an action, for example, a QPushButton.
QStyle::PE_FrameDefaultButton6This frame around a default button, e.g. in a dialog.
QStyle::PE_PanelButtonBevel19Generic panel with a button bevel.
QStyle::PE_PanelButtonTool20Panel for a Tool button, used with QToolButton.
QStyle::PE_PanelLineEdit23Panel for a QLineEdit.
QStyle::PE_IndicatorButtonDropDown29Indicator for a drop down button, for example, a tool button that displays a menu.
QStyle::PE_FrameFocusRect8Generic focus indicator.
QStyle::PE_IndicatorArrowUp27Generic Up arrow.
QStyle::PE_IndicatorArrowDown24Generic Down arrow.
QStyle::PE_IndicatorArrowRight26Generic Right arrow.
QStyle::PE_IndicatorArrowLeft25Generic Left arrow.
QStyle::PE_IndicatorSpinUp40Up symbol for a spin widget, for example a QSpinBox.
QStyle::PE_IndicatorSpinDown37Down symbol for a spin widget.
QStyle::PE_IndicatorSpinPlus39Increase symbol for a spin widget.
QStyle::PE_IndicatorSpinMinus38Decrease symbol for a spin widget.
QStyle::PE_IndicatorViewItemCheck30On/off indicator for a view item.
QStyle::PE_IndicatorCheckBox31On/off indicator, for example, a QCheckBox.
QStyle::PE_IndicatorRadioButton36Exclusive on/off indicator, for example, a QRadioButton.
QStyle::PE_Q3DockWindowSeparator3Item separator for Qt 3 compatible dock window and toolbar contents.
QStyle::PE_IndicatorDockWidgetResizeHandle32Resize handle for dock windows.
QStyle::PE_Frame5Generic frame; see also QFrame.
QStyle::PE_FrameMenu11Frame for popup windows/menus; see also QMenu.
QStyle::PE_PanelMenuBar21Panel for menu bars.
QStyle::PE_PanelScrollAreaCorner45Panel at the bottom-right (or bottom-left) corner of a scroll area.
QStyle::PE_FrameDockWidget7Panel frame for dock windows and toolbars.
QStyle::PE_FrameTabWidget13Frame for tab widgets.
QStyle::PE_FrameLineEdit10Panel frame for line edits.
QStyle::PE_FrameGroupBox9Panel frame around group boxes.
QStyle::PE_FrameButtonBevel15Panel frame for a button bevel.
QStyle::PE_FrameButtonTool16Panel frame for a tool button.
QStyle::PE_IndicatorHeaderArrow33Arrow used to indicate sorting on a list or table header.
QStyle::PE_FrameStatusBar12Frame for a section of a status bar; see also QStatusBar.
QStyle::PE_FrameWindow14Frame around a MDI window or a docking window.
QStyle::PE_Q3Separator4Qt 3 compatible generic separator.
QStyle::PE_IndicatorMenuCheckMark34Check mark used in a menu.
QStyle::PE_IndicatorProgressChunk35Section of a progress bar indicator; see also QProgressBar.
QStyle::PE_Q3CheckListController0Qt 3 compatible controller part of a list view item.
QStyle::PE_Q3CheckListIndicator2Qt 3 compatible checkbox part of a list view item.
QStyle::PE_Q3CheckListExclusiveIndicator1Qt 3 compatible radio button part of a list view item.
QStyle::PE_IndicatorBranch28Lines used to represent the branch of a tree in a tree view.
QStyle::PE_IndicatorToolBarHandle41The handle of a toolbar.
QStyle::PE_IndicatorToolBarSeparator42The separator in a toolbar.
QStyle::PE_PanelToolBar22The panel for a toolbar.
QStyle::PE_PanelTipLabel43The panel for a tip label.
QStyle::PE_FrameTabBarBase17The frame that is drawn for a tab bar, ususally drawn for a tab bar that isn't part of a tab widget.
QStyle::PE_IndicatorTabTear44An indicator that a tab is partially scrolled out of the visible tab bar when there are many tabs.
QStyle::PE_IndicatorColumnViewArrow47An arrow in a QColumnView.
QStyle::PE_Widget46A plain QWidget.
QStyle::PE_CustomBase0xf000000Base value for custom primitive elements. All values above this are reserved for custom use. Custom values must be greater than this value.

See also drawPrimitive().

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.

ConstantValueDescription
QStyle::SP_TitleBarMinButton1Minimize button on title bars (e.g., in QWorkspace).
QStyle::SP_TitleBarMenuButton0Menu button on a title bar.
QStyle::SP_TitleBarMaxButton2Maximize button on title bars.
QStyle::SP_TitleBarCloseButton3Close button on title bars.
QStyle::SP_TitleBarNormalButton4Normal (restore) button on title bars.
QStyle::SP_TitleBarShadeButton5Shade button on title bars.
QStyle::SP_TitleBarUnshadeButton6Unshade button on title bars.
QStyle::SP_TitleBarContextHelpButton7The Context help button on title bars.
QStyle::SP_MessageBoxInformation9The "information" icon.
QStyle::SP_MessageBoxWarning10The "warning" icon.
QStyle::SP_MessageBoxCritical11The "critical" icon.
QStyle::SP_MessageBoxQuestion12The "question" icon.
QStyle::SP_DesktopIcon13The "desktop" icon.
QStyle::SP_TrashIcon14The "trash" icon.
QStyle::SP_ComputerIcon15The "My computer" icon.
QStyle::SP_DriveFDIcon16The floppy icon.
QStyle::SP_DriveHDIcon17The harddrive icon.
QStyle::SP_DriveCDIcon18The CD icon.
QStyle::SP_DriveDVDIcon19The DVD icon.
QStyle::SP_DriveNetIcon20The network icon.
QStyle::SP_DirHomeIcon55The home directory icon.
QStyle::SP_DirOpenIcon21The open directory icon.
QStyle::SP_DirClosedIcon22The closed directory icon.
QStyle::SP_DirIcon37The directory icon.
QStyle::SP_DirLinkIcon23The link to directory icon.
QStyle::SP_FileIcon24The file icon.
QStyle::SP_FileLinkIcon25The link to file icon.
QStyle::SP_FileDialogStart28The "start" icon in a file dialog.
QStyle::SP_FileDialogEnd29The "end" icon in a file dialog.
QStyle::SP_FileDialogToParent30The "parent directory" icon in a file dialog.
QStyle::SP_FileDialogNewFolder31The "create new folder" icon in a file dialog.
QStyle::SP_FileDialogDetailedView32The detailed view icon in a file dialog.
QStyle::SP_FileDialogInfoView33The file info icon in a file dialog.
QStyle::SP_FileDialogContentsView34The contents view icon in a file dialog.
QStyle::SP_FileDialogListView35The list view icon in a file dialog.
QStyle::SP_FileDialogBack36The back arrow in a file dialog.
QStyle::SP_DockWidgetCloseButton8Close button on dock windows (see also QDockWidget).
QStyle::SP_ToolBarHorizontalExtensionButton26Extension button for horizontal toolbars.
QStyle::SP_ToolBarVerticalExtensionButton27Extension button for vertical toolbars.
QStyle::SP_DialogOkButton38Icon for a standard OK button in a QDialogButtonBox.
QStyle::SP_DialogCancelButton39Icon for a standard Cancel button in a QDialogButtonBox.
QStyle::SP_DialogHelpButton40Icon for a standard Help button in a QDialogButtonBox.
QStyle::SP_DialogOpenButton41Icon for a standard Open button in a QDialogButtonBox.
QStyle::SP_DialogSaveButton42Icon for a standard Save button in a QDialogButtonBox.
QStyle::SP_DialogCloseButton43Icon for a standard Close button in a QDialogButtonBox.
QStyle::SP_DialogApplyButton44Icon for a standard Apply button in a QDialogButtonBox.
QStyle::SP_DialogResetButton45Icon for a standard Reset button in a QDialogButtonBox.
QStyle::SP_DialogDiscardButton46Icon for a standard Discard button in a QDialogButtonBox.
QStyle::SP_DialogYesButton47Icon for a standard Yes button in a QDialogButtonBox.
QStyle::SP_DialogNoButton48Icon for a standard No button in a QDialogButtonBox.
QStyle::SP_ArrowUp49Icon arrow pointing up.
QStyle::SP_ArrowDown50Icon arrow pointing down.
QStyle::SP_ArrowLeft51Icon arrow pointing left.
QStyle::SP_ArrowRight52Icon arrow pointing right.
QStyle::SP_ArrowBack53Equivalent to SP_ArrowLeft when the current layout direction is Qt::LeftToRight, otherwise SP_ArrowRight.
QStyle::SP_ArrowForward54Equivalent to SP_ArrowRight when the current layout direction is Qt::LeftToRight, otherwise SP_ArrowLeft.
QStyle::SP_CommandLink56Icon used to indicate a Vista style command link glyph.
QStyle::SP_VistaShield57Icon used to indicate UAC prompts on Windows Vista. This will return a null pixmap or icon on all other platforms.
QStyle::SP_CustomBase0xf0000000Base value for custom standard pixmaps; custom values must be greater than this value.

See also standardPixmap() and 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.

ConstantValue
QStyle::State_None0x00000000
QStyle::State_Active0x00010000
QStyle::State_AutoRaise0x00001000
QStyle::State_Bottom0x00000400
QStyle::State_Children0x00080000
QStyle::State_DownArrow0x00000040
QStyle::State_Editing0x00400000
QStyle::State_Enabled0x00000001
QStyle::State_FocusAtBorder0x00000800
QStyle::State_HasEditFocus0x01000000
QStyle::State_HasFocus0x00000100
QStyle::State_Horizontal0x00000080
QStyle::State_Item0x00100000
QStyle::State_KeyboardFocusChange0x00800000
QStyle::State_Mini0x08000000
QStyle::State_MouseOver0x00002000
QStyle::State_NoChange0x00000010
QStyle::State_Off0x00000008
QStyle::State_On0x00000020
QStyle::State_Open0x00040000
QStyle::State_Raised0x00000002
QStyle::State_ReadOnly0x02000000
QStyle::State_Selected0x00008000
QStyle::State_Sibling0x00200000
QStyle::State_Small0x04000000
QStyle::State_Sunken0x00000004
QStyle::State_Top0x00000200
QStyle::State_UpArrow0x00004000
QStyle::State_Window0x00020000

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.

ConstantValueDescription
QStyle::SH_EtchDisabledText0Disabled text is "etched" as it is on Windows.
QStyle::SH_DitherDisabledText1Disabled text is dithered as it is on Motif.
QStyle::SH_GUIStyle0x00000100The GUI style to use.
QStyle::SH_ScrollBar_ContextMenu?Whether or not a scroll bar has a context menu.
QStyle::SH_ScrollBar_MiddleClickAbsolutePosition2A 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?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_ScrollWhenPointerLeavesControl3A 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?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_Alignment5The alignment for tabs in a QTabWidget. Possible values are Qt::AlignLeft, Qt::AlignCenter and Qt::AlignRight.
QStyle::SH_Header_ArrowAlignment6The placement of the sorting indicator may appear in list or table headers. Possible values are Qt::Left or Qt::Right.
QStyle::SH_Slider_SnapToValue7Sliders snap to values while moving, as they do on Windows.
QStyle::SH_Slider_SloppyKeyEvents8Key presses handled in a sloppy manner, i.e., left on a vertical slider subtracts a line.
QStyle::SH_ProgressDialog_CenterCancelButton9Center button on progress dialogs, like Motif, otherwise right aligned.
QStyle::SH_ProgressDialog_TextLabelAlignment10The alignment for text labels in progress dialogs; Qt::AlignCenter on Windows, Qt::AlignVCenter otherwise.
QStyle::SH_PrintDialog_RightAlignButtons11Right align buttons in the print dialog, as done on Windows.
QStyle::SH_MainWindow_SpaceBelowMenuBar12One or two pixel space between the menu bar and the dockarea, as done on Windows.
QStyle::SH_FontDialog_SelectAssociatedText13Select 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?Typing causes a menu to be search for relevant items, otherwise only mnemnonic is considered.
QStyle::SH_Menu_AllowActiveAndDisabled14Allows disabled menu items to be active.
QStyle::SH_Menu_SpaceActivatesItem15Pressing the space bar activates the item, as done on Motif.
QStyle::SH_Menu_SubMenuPopupDelay16The number of milliseconds to wait before opening a submenu (256 on Windows, 96 on Motif).
QStyle::SH_Menu_Scrollable?Whether popup menus must support scrolling.
QStyle::SH_Menu_SloppySubMenus?Whether popupmenu's must support sloppy submenu; as implemented on Mac OS.
QStyle::SH_ScrollView_FrameOnlyAroundContents17Whether scrollviews draw their frame only around contents (like Motif), or around contents, scroll bars and corner widgets (like Windows).
QStyle::SH_MenuBar_AltKeyNavigation18Menu bars items are navigable by pressing Alt, followed by using the arrow keys to select the desired item.
QStyle::SH_ComboBox_ListMouseTracking19Mouse tracking in combobox drop-down lists.
QStyle::SH_Menu_MouseTracking20Mouse tracking in popup menus.
QStyle::SH_MenuBar_MouseTracking21Mouse tracking in menu bars.
QStyle::SH_Menu_FillScreenWithScroll?Whether scrolling popups should fill the screen as they are scrolled.
QStyle::SH_Menu_SelectionWrap?Whether popups should allow the selections to wrap, that is when selection should the next item be the first item.
QStyle::SH_ItemView_ChangeHighlightOnFocus22Gray out selected items when losing focus.
QStyle::SH_Widget_ShareActivation23Turn on sharing activation with floating modeless dialogs.
QStyle::SH_TabBar_SelectMouseType4Which type of mouse event should cause a tab to be selected.
QStyle::SH_Q3ListViewExpand_SelectMouseType?Which type of mouse event should cause a list view expansion to be selected.
QStyle::SH_TabBar_PreferNoArrows?Whether a tab bar should suggest a size to prevent scoll arrows.
QStyle::SH_ComboBox_Popup25Allows popups as a combobox drop-down menu.
QStyle::SH_Workspace_FillSpaceOnMaximize24The workspace should maximize the client area.
QStyle::SH_TitleBar_NoBorder26The title bar has no border.
QStyle::SH_ScrollBar_StopMouseOverSliderSH_Slider_StopMouseOverSliderObsolete. Use SH_Slider_StopMouseOverSlider instead.
QStyle::SH_Slider_StopMouseOverSlider27Stops auto-repeat when the slider reaches the mouse position.
QStyle::SH_BlinkCursorWhenTextSelected?Whether cursor should blink when text is selected.
QStyle::SH_RichText_FullWidthSelection?Whether richtext selections should extend to the full width of the document.
QStyle::SH_GroupBox_TextLabelVerticalAlignment?How to vertically align a group box's text label.
QStyle::SH_GroupBox_TextLabelColor?How to paint a group box's text label.
QStyle::SH_DialogButtons_DefaultButton?Which button gets the default status in a dialog's button widget.
QStyle::SH_ToolBox_SelectedPageTitleBold?Boldness of the selected page title in a QToolBox.
QStyle::SH_LineEdit_PasswordCharacter?The Unicode character to be used for passwords.
QStyle::SH_Table_GridLineColor?The RGB value of the grid for a table.
QStyle::SH_UnderlineShortcut?Whether shortcuts are underlined.
QStyle::SH_SpellCheckUnderlineStyle?A QTextCharFormat::UnderlineStyle value that specifies the way misspelled words should be underlined.
QStyle::SH_SpinBox_AnimateButton?Animate a click when up or down is pressed in a spin box.
QStyle::SH_SpinBox_KeyPressAutoRepeatRate?Auto-repeat interval for spinbox key presses.
QStyle::SH_SpinBox_ClickAutoRepeatRate?Auto-repeat interval for spinbox mouse clicks.
QStyle::SH_ToolTipLabel_Opacity?An integer indicating the opacity for the tip label, 0 is completely transparent, 255 is completely opaque.
QStyle::SH_DrawMenuBarSeparator?Indicates whether or not the menu bar draws separators.
QStyle::SH_TitleBar_ModifyNotification?Indicates if the title bar should show a '*' for windows that are modified.
QStyle::SH_Button_FocusPolicy?The default focus policy for buttons.
QStyle::SH_CustomBase0xf0000000Base value for custom style hints. Custom values must be greater than this value.
QStyle::SH_MenuBar_DismissOnSecondClick?A boolean indicating if a menu in the menu bar should be dismissed when it is clicked on a second time. (Example: Clicking and releasing on the File Menu in a menu bar and then immediately clicking on the File Menu again.)
QStyle::SH_MessageBox_UseBorderForButtonSpacing?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?A boolean indicating whether the buttons in the message box should be centered or not (see QDialogButtonBox::setCentered()).
QStyle::SH_MessageBox_TextInteractionFlags?A boolean indicating if the text in a message box should allow user interfactions (e.g. selection) or not.
QStyle::SH_TitleBar_AutoRaise?A boolean indicating whether controls on a title bar ought to update when the mouse is over them.
QStyle::SH_ToolButton_PopupDelay?An int indicating the popup delay in milliseconds for menus attached to tool buttons.
QStyle::SH_FocusFrame_Mask?The mask of the focus frame.
QStyle::SH_RubberBand_Mask?The mask of the rubber band.
QStyle::SH_WindowFrame_Mask?The mask of the window frame.
QStyle::SH_SpinControls_DisableOnBounds?Determines if the spin controls will shown as disabled when reaching the spin range boundary.
QStyle::SH_Dial_BackgroundRole?Defines the style's preferred background role (as QPalette::ColorRole) for a dial widget.
QStyle::SH_ScrollBar_BackgroundMode?The background mode for a scroll bar.
QStyle::SH_ComboBox_LayoutDirection?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?The location where ellipses should be added for item text that is too long to fit in an view item.
QStyle::SH_ItemView_ShowDecorationSelected?When an item in an item view is selected, also highlight the branch or other decoration.
QStyle::SH_ItemView_ActivateItemOnSingleClick?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?Which mouse buttons cause a slider to set the value to the position clicked on.
QStyle::SH_Slider_PageSetButtons?Which mouse buttons cause a slider to page step the value.
QStyle::SH_TabBar_ElideMode?The default eliding style for a tab bar.
QStyle::SH_DialogButtonLayout?Controls how buttons are laid out in a QDialogButtonBox, returns a QDialogButtonBox::ButtonLayout enum.
QStyle::SH_WizardStyle?Controls the look and feel of a QWizard. Returns a QWizard::WizardStyle enum.
QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren?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?The frame style used when drawing a combobox popup menu.
QStyle::SH_DialogButtonBox_ButtonsHaveIcons?Indicates whether or not StandardButtons in QDialogButtonBox should have icons or not.
QStyle::SH_ItemView_MovementWithoutUpdatingSelection?The item view is able to indicate a current item without changing the selection.
QStyle::SH_ToolTip_Mask?The mask of a tool tip.
QStyle::SH_FocusFrame_AboveWidget?The FocusFrame is stacked above the widget that it is "focusing on".
QStyle::SH_TextControl_FocusIndicatorTextCharFormat?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.

Used to fill any area not covered by the items.

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).

ConstantValueDescription
QStyle::SC_None0x00000000Special value that matches no other sub control.
QStyle::SC_ScrollBarAddLine0x00000001Scroll bar add line (i.e., down/right arrow); see also QScrollBar.
QStyle::SC_ScrollBarSubLine0x00000002Scroll bar sub line (i.e., up/left arrow).
QStyle::SC_ScrollBarAddPage0x00000004Scroll bar add page (i.e., page down).
QStyle::SC_ScrollBarSubPage0x00000008Scroll bar sub page (i.e., page up).
QStyle::SC_ScrollBarFirst0x00000010Scroll bar first line (i.e., home).
QStyle::SC_ScrollBarLast0x00000020Scroll bar last line (i.e., end).
QStyle::SC_ScrollBarSlider0x00000040Scroll bar slider handle.
QStyle::SC_ScrollBarGroove0x00000080Special sub-control which contains the area in which the slider handle may move.
QStyle::SC_SpinBoxUp0x00000001Spin widget up/increase; see also QSpinBox.
QStyle::SC_SpinBoxDown0x00000002Spin widget down/decrease.
QStyle::SC_SpinBoxFrame0x00000004Spin widget frame.
QStyle::SC_SpinBoxEditField0x00000008Spin widget edit field.
QStyle::SC_ComboBoxEditField0x00000002Combobox edit field; see also QComboBox.
QStyle::SC_ComboBoxArrow0x00000004Combobox arrow button.
QStyle::SC_ComboBoxFrame0x00000001Combobox frame.
QStyle::SC_ComboBoxListBoxPopup0x00000008The reference rectangle for the combobox popup. Used to calculate the position of the popup.
QStyle::SC_SliderGroove0x00000001Special sub-control which contains the area in which the slider handle may move.
QStyle::SC_SliderHandle0x00000002Slider handle.
QStyle::SC_SliderTickmarks0x00000004Slider tickmarks.
QStyle::SC_ToolButton0x00000001Tool button (see also QToolButton).
QStyle::SC_ToolButtonMenu0x00000002Sub-control for opening a popup menu in a tool button; see also Q3PopupMenu.
QStyle::SC_TitleBarSysMenu0x00000001System menu button (i.e., restore, close, etc.).
QStyle::SC_TitleBarMinButton0x00000002Minimize button.
QStyle::SC_TitleBarMaxButton0x00000004Maximize button.
QStyle::SC_TitleBarCloseButton0x00000008Close button.
QStyle::SC_TitleBarLabel0x00000100Window title label.
QStyle::SC_TitleBarNormalButton0x00000010Normal (restore) button.
QStyle::SC_TitleBarShadeButton0x00000020Shade button.
QStyle::SC_TitleBarUnshadeButton0x00000040Unshade button.
QStyle::SC_TitleBarContextHelpButton0x00000080Context Help button.
QStyle::SC_Q3ListView0x00000001The list view area.
QStyle::SC_Q3ListViewExpand0x00000004Expand item (i.e., show/hide child items).
QStyle::SC_DialHandle0x00000002The handle of the dial (i.e. what you use to control the dial).
QStyle::SC_DialGroove0x00000001The groove for the dial.
QStyle::SC_DialTickmarks0x00000004The tickmarks for the dial.
QStyle::SC_GroupBoxFrame0x00000008The frame of a group box.
QStyle::SC_GroupBoxLabel0x00000002The title of a group box.
QStyle::SC_GroupBoxCheckBox0x00000001The optional check box of a group box.
QStyle::SC_GroupBoxContents0x00000004The group box contents.
QStyle::SC_MdiNormalButton0x00000002The normal button for a MDI subwindow in the menu bar.
QStyle::SC_MdiMinButton0x00000001The minimize button for a MDI subwindow in the menu bar.
QStyle::SC_MdiCloseButton0x00000004The close button for a MDI subwindow in the menu bar.
QStyle::SC_All0xffffffffSpecial 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.

ConstantValueDescription
QStyle::SE_PushButtonContents0Area containing the label (icon with text or pixmap).
QStyle::SE_PushButtonFocusRect1Area for the focus rect (usually larger than the contents rect).
QStyle::SE_PushButtonLayoutItem48Area that counts for the parent layout.
QStyle::SE_CheckBoxIndicator2Area for the state indicator (e.g., check mark).
QStyle::SE_CheckBoxContents3Area for the label (text or pixmap).
QStyle::SE_CheckBoxFocusRect4Area for the focus indicator.
QStyle::SE_CheckBoxClickRect5Clickable area, defaults to SE_CheckBoxFocusRect.
QStyle::SE_CheckBoxLayoutItem42Area that counts for the parent layout.
QStyle::SE_DateTimeEditLayoutItem44Area that counts for the parent layout.
QStyle::SE_RadioButtonIndicator6Area for the state indicator.
QStyle::SE_RadioButtonContents7Area for the label.
QStyle::SE_RadioButtonFocusRect8Area for the focus indicator.
QStyle::SE_RadioButtonClickRect9Clickable area, defaults to SE_RadioButtonFocusRect.
QStyle::SE_RadioButtonLayoutItem49Area that counts for the parent layout.
QStyle::SE_ComboBoxFocusRect10Area for the focus indicator.
QStyle::SE_SliderFocusRect11Area for the focus indicator.
QStyle::SE_SliderLayoutItem50Area that counts for the parent layout.
QStyle::SE_SpinBoxLayoutItem51Area that counts for the parent layout.
QStyle::SE_Q3DockWindowHandleRect12Area for the tear-off handle.
QStyle::SE_ProgressBarGroove13Area for the groove.
QStyle::SE_ProgressBarContents14Area for the progress indicator.
QStyle::SE_ProgressBarLabel15Area for the text label.
QStyle::SE_ProgressBarLayoutItem47Area that counts for the parent layout.
QStyle::SE_FrameContents37Area for a frame's contents.
QStyle::SE_FrameLayoutItem53Area that counts for the parent layout.
QStyle::SE_HeaderArrow27Area for the sort indicator for a header.
QStyle::SE_HeaderLabel26Area for the label in a header.
QStyle::SE_LabelLayoutItem46Area that counts for the parent layout.
QStyle::SE_LineEditContents36Area for a line edit's contents.
QStyle::SE_TabWidgetLeftCorner31Area for the left corner widget in a tab widget.
QStyle::SE_TabWidgetRightCorner32Area for the right corner widget in a tab widget.
QStyle::SE_TabWidgetTabBar28Area for the tab bar widget in a tab widget.
QStyle::SE_TabWidgetTabContents30Area for the contents of the tab widget.
QStyle::SE_TabWidgetTabPane29Area for the pane of a tab widget.
QStyle::SE_TabWidgetLayoutItem55Area that counts for the parent layout.
QStyle::SE_ToolBoxTabContents25Area for a toolbox tab's icon and label.
QStyle::SE_ToolButtonLayoutItem52Area that counts for the parent layout.
QStyle::SE_ViewItemCheckIndicator33Area for a view item's check mark.
QStyle::SE_TabBarTearIndicator34Area for the tear indicator on a tab bar with scroll arrows.
QStyle::SE_TreeViewDisclosureItem35Area for the actual disclosure item in a tree branch.
QStyle::SE_DialogButtonBoxLayoutItem45Area that counts for the parent layout.
QStyle::SE_GroupBoxLayoutItem54Area that counts for the parent layout.
QStyle::SE_CustomBase0xf0000000Base value for custom sub-elements. Custom values must be greater than this value.
QStyle::SE_DockWidgetFloatButton39The float button of a dock widget.
QStyle::SE_DockWidgetTitleBarText40The text bounds of the dock widgets title.
QStyle::SE_DockWidgetCloseButton38The close button of a dock widget.
QStyle::SE_DockWidgetIcon41The icon of a dock widget.
QStyle::SE_ComboBoxLayoutItem43Area that counts for the parent layout.

See also subElementRect().

Member Function Documentation

QStyle::QStyle ()

Constructs a style object.

QStyle::~QStyle ()   [virtual]

Destroys the style object.

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

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 = 0, QWidget * widget = 0 ) 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() and layoutSpacingImplementation().

void QStyle::drawComplexControl ( ComplexControl control, const QStyleOptionComplex * option, QPainter * painter, const QWidget * widget = 0 ) const   [pure virtual]

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 ControlQStyleOptionComplex SubclassStyle FlagRemark
CC_SpinBoxQStyleOptionSpinBoxState_EnabledSet if the spin box is enabled.
State_HasFocusSet if the spin box has input focus.
CC_ComboBoxQStyleOptionComboBoxState_EnabledSet if the combobox is enabled.
State_HasFocusSet if the combobox has input focus.
CC_ScrollBarQStyleOptionSliderState_EnabledSet if the scroll bar is enabled.
State_HasFocusSet if the scroll bar has input focus.
CC_SliderQStyleOptionSliderState_EnabledSet if the slider is enabled.
State_HasFocusSet if the slider has input focus.
CC_DialQStyleOptionSliderState_EnabledSet if the dial is enabled.
State_HasFocusSet if the dial has input focus.
CC_ToolButtonQStyleOptionToolButtonState_EnabledSet if the tool button is enabled.
State_HasFocusSet if the tool button has input focus.
State_DownArrowSet if the tool button is down (i.e., a mouse button or the space bar is pressed).
State_OnSet if the tool button is a toggle button and is toggled on.
State_AutoRaiseSet if the tool button has auto-raise enabled.
State_RaisedSet if the button is not down, not on, and doesn't contain the mouse when auto-raise is enabled.
CC_TitleBarQStyleOptionTitleBarState_EnabledSet if the title bar is enabled.
CC_Q3ListViewQStyleOptionQ3ListViewState_EnabledSet if the list view is enabled.

See also drawPrimitive() and drawControl().

void QStyle::drawControl ( ControlElement element, const QStyleOption * option, QPainter * painter, const QWidget * widget = 0 ) const   [pure virtual]

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 ElementQStyleOption SubclassStyle FlagRemark
CE_MenuItem, CE_MenuBarItemQStyleOptionMenuItemState_SelectedThe menu item is currently selected item.
State_EnabledThe item is enabled.
State_DownArrowIndicates that a scroll down arrow should be drawn.
State_UpArrowIndicates that a scroll up arrow should be drawn
State_HasFocusSet if the menu bar has input focus.
CE_PushButton, CE_PushButtonBevel, CE_PushButtonLabelQStyleOptionButtonState_EnabledSet if the button is enabled.
State_HasFocusSet if the button has input focus.
State_RaisedSet if the button is not down, not on and not flat.
State_OnSet if the button is a toggle button and is toggled on.
State_SunkenSet 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_CheckBoxLabelQStyleOptionButtonState_EnabledSet if the button is enabled.
State_HasFocusSet if the button has input focus.
State_OnSet if the button is checked.
State_OffSet if the button is not checked.
State_NoChangeSet if the button is in the NoChange state.
State_SunkenSet if the button is down (i.e., the mouse button or the space bar is pressed on the button).
CE_ProgressBarContents, CE_ProgressBarLabel, CE_ProgressBarGrooveQStyleOptionProgressBarState_EnabledSet if the progress bar is enabled.
State_HasFocusSet if the progress bar has input focus.
CE_Header, CE_HeaderSection, CE_HeaderLabelQStyleOptionHeader
CE_TabBarTab, CE_TabBarTabShape, CE_TabBarTabLabelQStyleOptionTabState_EnabledSet if the tab bar is enabled.
State_SelectedThe tab bar is the currently selected tab bar.
State_HasFocusSet if the tab bar tab has input focus.
CE_ToolButtonLabelQStyleOptionToolButtonState_EnabledSet if the tool button is enabled.
State_HasFocusSet if the tool button has input focus.
State_SunkenSet if the tool button is down (i.e., a mouse button or the space bar is pressed).
State_OnSet if the tool button is a toggle button and is toggled on.
State_AutoRaiseSet if the tool button has auto-raise enabled.
State_MouseOverSet if the mouse pointer is over the tool button.
State_RaisedSet if the button is not down and is not on.
CE_ToolBoxTabQStyleOptionToolBoxState_SelectedThe tab is the currently selected tab.
CE_HeaderSectionQStyleOptionHeaderState_SunkenIndicates that the section is pressed.
State_UpArrowIndicates that the sort indicator should be pointing up.
State_DownArrowIndicates that the sort indicator should be pointing down.

See also drawPrimitive() and drawComplexControl().

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

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

See also drawItemText().

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

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().

void QStyle::drawPrimitive ( PrimitiveElement element, const QStyleOption * option, QPainter * painter, const QWidget * widget = 0 ) const   [pure virtual]

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 ElementQStyleOption SubclassStyle FlagRemark
PE_FrameFocusRectQStyleOptionFocusRectState_FocusAtBorderWhether the focus is is at the border or inside the widget.
PE_IndicatorCheckBoxQStyleOptionButtonState_NoChangeIndicates a "tri-state" checkbox.
State_OnIndicates the indicator is checked.
PE_IndicatorRadioButtonQStyleOptionButtonState_OnIndicates that a radio button is selected.
PE_Q3CheckListExclusiveIndicator, PE_Q3CheckListIndicatorQStyleOptionQ3ListViewState_OnIndicates whether or not the controller is selected.
State_NoChangeIndicates a "tri-state" controller.
State_EnabledIndicates the controller is enabled.
PE_IndicatorBranchQStyleOptionState_ChildrenIndicates that the control for expanding the tree to show child items, should be drawn.
State_ItemIndicates that a horizontal branch (to show a child item), should be drawn.
State_OpenIndicates that the tree branch is expanded.
State_SiblingIndicates that a vertical line (to show a sibling item), should be drawn.
PE_IndicatorHeaderArrowQStyleOptionHeaderState_UpArrowIndicates that the arrow should be drawn up; otherwise it should be down.
PE_FrameGroupBox, PE_Frame, PE_FrameLineEdit, PE_FrameMenu, PE_FrameDockWidgetQStyleOptionFrameState_SunkenIndicates that the Frame should be sunken.
PE_IndicatorToolBarHandleQStyleOptionState_HorizontalIndicates that the window handle is horizontal instead of vertical.
PE_Q3DockWindowSeparatorQStyleOptionState_HorizontalIndicates that the separator is horizontal instead of vertical.
PE_IndicatorSpinPlus, PE_IndicatorSpinMinus, PE_IndicatorSpinUp, PE_IndicatorSpinDown,QStyleOptionSpinBoxState_SunkenIndicates that the button is pressed.

See also drawComplexControl() and drawControl().

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

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.

SubControl QStyle::hitTestComplexControl ( ComplexControl control, const QStyleOptionComplex * option, const QPoint & position, const QWidget * widget = 0 ) const   [pure virtual]

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().

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

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

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

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.

int QStyle::layoutSpacing ( QSizePolicy::ControlType control1, QSizePolicy::ControlType control2, Qt::Orientation orientation, const QStyleOption * option = 0, const QWidget * widget = 0 ) 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.

For binary compatibility reasons, this function is not virtual. If you want to specify custom layout spacings in a QStyle subclass, implement a slot called layoutSpacingImplementation(). QStyle will discover the slot at run-time (using Qt's meta-object system) and direct all calls to layoutSpacing() to layoutSpacingImplementation().

This function was introduced in Qt 4.3.

See also combinedLayoutSpacing() and layoutSpacingImplementation().

int QStyle::layoutSpacingImplementation ( QSizePolicy::ControlType control1, QSizePolicy::ControlType control2, Qt::Orientation orientation, const QStyleOption * option = 0, const QWidget * widget = 0 ) const   [protected slot]

This slot is called by layoutSpacing() to determine 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.

If you want to provide custom layout spacings in a QStyle subclass, implement a slot called layoutSpacingImplementation() in your subclass. Be aware that this slot will only be called if PM_LayoutHorizontalSpacing or PM_LayoutVerticalSpacing returns a negative value.

The default implementation returns -1.

This function was introduced in Qt 4.3.

See also layoutSpacing() and combinedLayoutSpacing().

int QStyle::pixelMetric ( PixelMetric metric, const QStyleOption * option = 0, const QWidget * widget = 0 ) const   [pure virtual]

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 MetricQStyleOption Subclass
PM_SliderControlThicknessQStyleOptionSlider
PM_SliderLengthQStyleOptionSlider
PM_SliderTickmarkOffsetQStyleOptionSlider
PM_SliderSpaceAvailableQStyleOptionSlider
PM_ScrollBarExtentQStyleOptionSlider
PM_TabBarTabOverlapQStyleOptionTab
PM_TabBarTabHSpaceQStyleOptionTab
PM_TabBarTabVSpaceQStyleOptionTab
PM_TabBarBaseHeightQStyleOptionTab
PM_TabBarBaseOverlapQStyleOptionTab

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.

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

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 do provide a back-door through which the appearance of a widget can be changed, but with Qt 4.0's style engine there is rarely necessary to implement this function; reimplement the 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().

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

This is an overloaded member function, provided for convenience.

Late initialization of the given application object.

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

This is an overloaded member function, provided for convenience.

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

See also QPalette and QApplication::setPalette().

QSize QStyle::sizeFromContents ( ContentsType type, const QStyleOption * option, const QSize & contentsSize, const QWidget * widget = 0 ) const   [pure virtual]

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 TypeQStyleOption Subclass
CT_PushButtonQStyleOptionButton
CT_CheckBoxQStyleOptionButton
CT_RadioButtonQStyleOptionButton
CT_ToolButtonQStyleOptionToolButton
CT_ComboBoxQStyleOptionComboBox
CT_SplitterQStyleOption
CT_Q3DockWindowQStyleOptionQ3DockWindow
CT_ProgressBarQStyleOptionProgressBar
CT_MenuItemQStyleOptionMenuItem

See also ContentsType and QStyleOption.

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

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().

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

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().

QIcon QStyle::standardIcon ( StandardPixmap standardIcon, const QStyleOption * option = 0, const QWidget * widget = 0 ) 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.

Warning: Because of binary compatibility constraints, this function is not virtual. If you want to provide your own icons in a QStyle subclass, reimplement the standardIconImplementation() slot in your subclass instead. The standardIcon() function will dynamically detect the slot and call it.

This function was introduced in Qt 4.1.

See also standardIconImplementation() and standardPixmap().

QIcon QStyle::standardIconImplementation ( StandardPixmap standardIcon, const QStyleOption * option = 0, const QWidget * widget = 0 ) const   [protected slot]

Returns an icon for the given standardIcon.

Reimplement this slot to provide your own icons in a QStyle subclass; because of binary compatibility constraints, the standardIcon() function (introduced in Qt 4.1) is not virtual. Instead, standardIcon() will dynamically detect and call this slot. The default implementation simply calls the standardPixmap() function with the given parameters.

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.

See also standardIcon().

QPalette QStyle::standardPalette () const   [virtual]

Returns the style's standard palette.

Note that on systems that support system colors, the style's standard palette is not used.

int QStyle::styleHint ( StyleHint hint, const QStyleOption * option = 0, const QWidget * widget = 0, QStyleHintReturn * returnData = 0 ) const   [pure virtual]

Returns an integer representing the specified style hint for the given widget described by the provided style option.

Note that currently, the returnData and widget parameters are not used; they are provided for future enhancement. In addition, the option parameter is used only in case of the SH_ComboBox_Popup, SH_ComboBox_LayoutDirection, and SH_GroupBox_TextLabelColor style hints.

QRect QStyle::subControlRect ( ComplexControl control, const QStyleOptionComplex * option, SubControl subControl, const QWidget * widget = 0 ) const   [pure virtual]

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().

QRect QStyle::subElementRect ( SubElement element, const QStyleOption * option, const QWidget * widget = 0 ) const   [pure virtual]

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 ElementQStyleOption Subclass
SE_PushButtonContentsQStyleOptionButton
SE_PushButtonFocusRectQStyleOptionButton
SE_CheckBoxIndicatorQStyleOptionButton
SE_CheckBoxContentsQStyleOptionButton
SE_CheckBoxFocusRectQStyleOptionButton
SE_RadioButtonIndicatorQStyleOptionButton
SE_RadioButtonContentsQStyleOptionButton
SE_RadioButtonFocusRectQStyleOptionButton
SE_ComboBoxFocusRectQStyleOptionComboBox
SE_Q3DockWindowHandleRectQStyleOptionQ3DockWindow
SE_ProgressBarGrooveQStyleOptionProgressBar
SE_ProgressBarContentsQStyleOptionProgressBar
SE_ProgressBarLabelQStyleOptionProgressBar

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

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().

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

This is an overloaded member function, provided for convenience.

Uninitialize the given application.

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

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

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

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.

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

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.
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