QProxyStyle Class Reference
The QProxyStyle class is a convenience class that simplifies dynamically overriding QStyle elements. More...
#include <QProxyStyle> Inherits: QCommonStyle .
This class was introduced in Qt 4.6.
Public Functions
Reimplemented Public Functions
virtual void drawComplexControl control , const QStyleOptionComplex * option , QPainter * painter , const QWidget * widget = 0 ) const virtual void drawControl element , const QStyleOption * option , QPainter * painter , const QWidget * widget = 0 ) const virtual void drawItemPixmap painter , const QRect & rect , int alignment , const QPixmap & pixmap ) const virtual void drawItemText painter , const QRect & rect , int flags , const QPalette & pal , bool enabled , const QString & text , QPalette::ColorRole textRole = QPalette::NoRole ) const virtual void drawPrimitive element , const QStyleOption * option , QPainter * painter , const QWidget * widget = 0 ) const virtual QPixmap generatedIconPixmap iconMode , const QPixmap & pixmap , const QStyleOption * opt ) const virtual SubControl hitTestComplexControl control , const QStyleOptionComplex * option , const QPoint & pos , const QWidget * widget = 0 ) const virtual QRect itemPixmapRect r , int flags , const QPixmap & pixmap ) const virtual QRect itemTextRect fm , const QRect & r , int flags , bool enabled , const QString & text ) const virtual int pixelMetric metric , const QStyleOption * option = 0, const QWidget * widget = 0 ) const virtual void polish widget ) virtual void polish pal ) virtual void polish app ) virtual QSize sizeFromContents type , const QStyleOption * option , const QSize & size , const QWidget * widget ) const virtual QPalette standardPalette virtual QPixmap standardPixmap standardPixmap , const QStyleOption * opt , const QWidget * widget = 0 ) const virtual int styleHint hint , const QStyleOption * option = 0, const QWidget * widget = 0, QStyleHintReturn * returnData = 0 ) const virtual QRect subControlRect cc , const QStyleOptionComplex * option , SubControl sc , const QWidget * widget ) const virtual QRect subElementRect element , const QStyleOption * option , const QWidget * widget ) const virtual void unpolish widget ) virtual void unpolish app )
16 public functions inherited from QCommonStyle
24 public functions inherited from QStyle
29 public functions inherited from QObject
Reimplemented Protected Functions
virtual bool event e )
8 protected functions inherited from QObject
Protected Slots
int layoutSpacingImplementation control1 , QSizePolicy::ControlType control2 , Qt::Orientation orientation , const QStyleOption * option = 0, const QWidget * widget = 0 ) const QIcon standardIconImplementation standardIcon , const QStyleOption * option , const QWidget * widget ) const
2 protected slots inherited from QStyle
Additional Inherited Members
1 property inherited from QObject
1 public slot inherited from QObject
1 signal inherited from QObject
6 static public members inherited from QStyle
7 static public members inherited from QObject
8 protected functions inherited from QObject
Detailed Description
The QProxyStyle class is a convenience class that simplifies dynamically overriding QStyle elements.
A QProxyStyle wraps a QStyle (usually the default system style) for the purpose of dynamically overriding painting or other specific style behavior.
The following example shows how to override the shortcut underline behavior on any platform:
#include "textedit.h"
#include <QApplication>
#include <QProxyStyle>
class MyProxyStyle : public QProxyStyle
{
public :
int styleHint(StyleHint hint, const QStyleOption * option = 0 ,
const QWidget * widget = 0 , QStyleHintReturn * returnData = 0 ) const
{
if (hint = = QStyle :: SH_UnderlineShortcut)
return 0 ;
return QProxyStyle :: styleHint(hint, option, widget, returnData);
}
};
int main(int argc, char * * argv)
{
Q_INIT_RESOURCE(textedit);
QApplication , argv);
a. setStyle(new MyProxyStyle);
TextEdit mw;
mw. resize(700 , 800 );
mw. show();
}
Warning: The common styles provided by Qt will respect this hint, because they call QStyle::proxy (), but there is no guarantee that QStyle::proxy () will be called for user defined or system controlled styles. It would not work on a Mac, for example, where menus are handled by the operating system.
See also QStyle .
Member Function Documentation
QProxyStyle ( QStyle style = 0 )Constructs a QProxyStyle object for overriding behavior in style or in the current application style if style is 0 (default). Normally style is 0, because you want to override behavior in the system style.
Ownership of style is transferred to QProxyStyle .
~QProxyStyle ()Destroys the QProxyStyle object.
QStyle baseStyle () constReturns the proxy base style object. If no base style is set on the proxy style, QProxyStyle will create an instance of the application style instead.
See also setBaseStyle () and QStyle .
void QProxyStyle::drawComplexControl ( ComplexControl control , const QStyleOptionComplex option , QPainter painter , const QWidget widget = 0 ) const [virtual] Reimplemented from QStyle::drawComplexControl ().
void QProxyStyle::drawControl ( ControlElement element , const QStyleOption option , QPainter painter , const QWidget widget = 0 ) const [virtual] Reimplemented from QStyle::drawControl ().
void QProxyStyle::drawItemPixmap ( QPainter painter , const QRect rect , int alignment , const QPixmap pixmap ) const [virtual] Reimplemented from QStyle::drawItemPixmap ().
void QProxyStyle::drawItemText ( QPainter painter , const QRect rect , int flags , const QPalette pal , bool enabled , const QString text , QPalette::ColorRole textRole = QPalette::NoRole ) const [virtual] Reimplemented from QStyle::drawItemText ().
void QProxyStyle::drawPrimitive ( PrimitiveElement element , const QStyleOption option , QPainter painter , const QWidget widget = 0 ) const [virtual] Reimplemented from QStyle::drawPrimitive ().
bool QProxyStyle::event ( QEvent e ) [virtual protected] Reimplemented from QObject::event ().
QPixmap generatedIconPixmap ( QIcon::Mode iconMode , const QPixmap pixmap , const QStyleOption opt ) const [virtual] Reimplemented from QStyle::generatedIconPixmap ().
SubControl hitTestComplexControl ( ComplexControl control , const QStyleOptionComplex option , const QPoint pos , const QWidget widget = 0 ) const [virtual] Reimplemented from QStyle::hitTestComplexControl ().
QRect itemPixmapRect ( const QRect r , int flags , const QPixmap pixmap ) const [virtual] Reimplemented from QStyle::itemPixmapRect ().
QRect itemTextRect ( const QFontMetrics fm , const QRect r , int flags , bool enabled , const QString text ) const [virtual] Reimplemented from QStyle::itemTextRect ().
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.
The default implementation returns -1.
See also layoutSpacing () and combinedLayoutSpacing ().
int QProxyStyle::pixelMetric ( PixelMetric metric , const QStyleOption option = 0, const QWidget widget = 0 ) const [virtual] Reimplemented from QStyle::pixelMetric ().
void QProxyStyle::polish ( QWidget widget ) [virtual] Reimplemented from QStyle::polish ().
void QProxyStyle::polish ( QPalette pal ) [virtual] Reimplemented from QStyle::polish ().
void QProxyStyle::polish ( QApplication app ) [virtual] Reimplemented from QStyle::polish ().
void QProxyStyle::setBaseStyle ( QStyle style )Sets the base style that should be proxied.
Ownership of style is transferred to QProxyStyle .
If style is zero, a desktop-dependant style will be assigned automatically.
See also baseStyle ().
QSize sizeFromContents ( ContentsType type , const QStyleOption option , const QSize size , const QWidget widget ) const [virtual] Reimplemented from QStyle::sizeFromContents ().
QIcon standardIconImplementation ( StandardPixmap standardIcon , const QStyleOption option , const QWidget widget ) const [protected slot] Returns an icon for the given standardIcon .
Reimplement this slot to provide your own icons in a QStyle subclass. The option argument can be used to pass extra information required to find the appropriate icon. The widget argument is optional and can also be used to help find the icon.
Note: Because of binary compatibility constraints, standardIcon () introduced in Qt 4.1 is not virtual. Therefore it must dynamically detect and call this slot. This default implementation simply calls standardIcon () with the given parameters.
See also standardIcon ().
QPalette standardPalette () const [virtual] Reimplemented from QStyle::standardPalette ().
QPixmap standardPixmap ( StandardPixmap standardPixmap , const QStyleOption opt , const QWidget widget = 0 ) const [virtual] Reimplemented from QStyle::standardPixmap ().
int QProxyStyle::styleHint ( StyleHint hint , const QStyleOption option = 0, const QWidget widget = 0, QStyleHintReturn returnData = 0 ) const [virtual] Reimplemented from QStyle::styleHint ().
Reimplemented from QStyle::subControlRect ().
QRect subElementRect ( SubElement element , const QStyleOption option , const QWidget widget ) const [virtual] Reimplemented from QStyle::subElementRect ().
void QProxyStyle::unpolish ( QWidget widget ) [virtual] Reimplemented from QStyle::unpolish ().
void QProxyStyle::unpolish ( QApplication app ) [virtual] Reimplemented from QStyle::unpolish ().
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