QProxyStyle Class

The QProxyStyle class is a convenience class that simplifies dynamically overriding QStyle elements. More...

Header: #include <QProxyStyle>
qmake: QT += widgets
Since: Qt 4.6
Inherits: QCommonStyle.

Public Functions

QProxyStyle(QStyle * style = 0)
QProxyStyle(const QString & key)
~QProxyStyle()
QStyle * baseStyle() const
void setBaseStyle(QStyle * style)

Reimplemented Public Functions

virtual void drawComplexControl(ComplexControl control, const QStyleOptionComplex * option, QPainter * painter, const QWidget * widget = 0) const
virtual void drawControl(ControlElement element, const QStyleOption * option, QPainter * painter, const QWidget * widget = 0) const
virtual void drawItemPixmap(QPainter * painter, const QRect & rect, int alignment, const QPixmap & pixmap) const
virtual void drawItemText(QPainter * painter, const QRect & rect, int flags, const QPalette & pal, 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
virtual QPixmap generatedIconPixmap(QIcon::Mode iconMode, const QPixmap & pixmap, const QStyleOption * opt) const
virtual SubControl hitTestComplexControl(ComplexControl control, const QStyleOptionComplex * option, const QPoint & pos, const QWidget * widget = 0) const
virtual QRect itemPixmapRect(const QRect & r, int flags, const QPixmap & pixmap) const
virtual QRect itemTextRect(const QFontMetrics & fm, const QRect & r, int flags, bool enabled, const QString & text) const
virtual 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
virtual void polish(QWidget * widget)
virtual void polish(QPalette & pal)
virtual void polish(QApplication * app)
virtual QSize sizeFromContents(ContentsType type, const QStyleOption * option, const QSize & size, const QWidget * widget) const
virtual QIcon standardIcon(StandardPixmap standardIcon, const QStyleOption * option = 0, const QWidget * widget = 0) const
virtual QPalette standardPalette() const
virtual QPixmap standardPixmap(StandardPixmap standardPixmap, const QStyleOption * opt, const QWidget * widget = 0) const
virtual int styleHint(StyleHint hint, const QStyleOption * option = 0, const QWidget * widget = 0, QStyleHintReturn * returnData = 0) const
virtual QRect subControlRect(ComplexControl cc, const QStyleOptionComplex * option, SubControl sc, const QWidget * widget) const
virtual QRect subElementRect(SubElement element, const QStyleOption * option, const QWidget * widget) const
virtual void unpolish(QWidget * widget)
virtual void unpolish(QApplication * app)
  • 17 public functions inherited from QCommonStyle
  • 24 public functions inherited from QStyle
  • 31 public functions inherited from QObject

Reimplemented Protected Functions

virtual bool event(QEvent * e)
  • 9 protected functions 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
  • 6 static public members inherited from QStyle
  • 10 static public members inherited from QObject
  • 9 protected functions inherited from QObject
  • 2 protected variables 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 a(argc, 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::QProxyStyle(QStyle * style = 0)

Constructs a QProxyStyle object for overriding behavior in the specified base style, or in the current application style if base style is not specified.

Ownership of style is transferred to QProxyStyle.

QProxyStyle::QProxyStyle(const QString & key)

Constructs a QProxyStyle object for overriding behavior in the base style specified by style key, or in the current application style if the specified style key is unrecognized.

See also QStyleFactory::create().

QProxyStyle::~QProxyStyle()

Destroys the QProxyStyle object.

QStyle * QProxyStyle::baseStyle() const

Returns 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 QProxyStyle::generatedIconPixmap(QIcon::Mode iconMode, const QPixmap & pixmap, const QStyleOption * opt) const [virtual]

Reimplemented from QStyle::generatedIconPixmap().

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

Reimplemented from QStyle::hitTestComplexControl().

QRect QProxyStyle::itemPixmapRect(const QRect & r, int flags, const QPixmap & pixmap) const [virtual]

Reimplemented from QStyle::itemPixmapRect().

QRect QProxyStyle::itemTextRect(const QFontMetrics & fm, const QRect & r, int flags, bool enabled, const QString & text) const [virtual]

Reimplemented from QStyle::itemTextRect().

int QProxyStyle::layoutSpacing(QSizePolicy::ControlType control1, QSizePolicy::ControlType control2, Qt::Orientation orientation, const QStyleOption * option = 0, const QWidget * widget = 0) const [virtual]

Reimplemented from QStyle::layoutSpacing().

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 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 QProxyStyle::sizeFromContents(ContentsType type, const QStyleOption * option, const QSize & size, const QWidget * widget) const [virtual]

Reimplemented from QStyle::sizeFromContents().

QIcon QProxyStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption * option = 0, const QWidget * widget = 0) const [virtual]

Reimplemented from QStyle::standardIcon().

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.

QPalette QProxyStyle::standardPalette() const [virtual]

Reimplemented from QStyle::standardPalette().

QPixmap QProxyStyle::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().

QRect QProxyStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex * option, SubControl sc, const QWidget * widget) const [virtual]

Reimplemented from QStyle::subControlRect().

QRect QProxyStyle::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().

Notes provided by the Qt Community

No notes