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QGraphicsDropShadowEffect Class Reference
[модуль QtGui]

The QGraphicsDropShadowEffect class provides a drop shadow effect. Далее...

 #include <QGraphicsDropShadowEffect>

Inherits QGraphicsEffect.

Этот класс был введён в Qt 4.6.

• Список всех членов, включая унаследованные

Свойства

• 1 property inherited from QGraphicsEffect
• 1 свойство, унаследованное от QObject

Открытые функции

Вновь реализованные открытые функции

• 3 public functions inherited from QGraphicsEffect
• 29 открытых функций, унаследованных от QObject

Открытые слоты

• 2 public slots inherited from QGraphicsEffect
• 1 открытый слот, унаследованный от QObject

Сигналы

• 1 signal inherited from QGraphicsEffect
• 1 сигнал, унаследованный от QObject

Переопределённые защищенные функции

• 7 protected functions inherited from QGraphicsEffect
• 7 защищенных функций, унаследованных от QObject

Дополнительные унаследованные члены

• 5 статических открытых членов, унаследованных от QObject
• 7 protected functions inherited from QGraphicsEffect
• 7 защищенных функций, унаследованных от QObject

Подробное описание

The QGraphicsDropShadowEffect class provides a drop shadow effect.

A drop shadow effect renders the source with a drop shadow. The color of the drop shadow can be modified using the setColor() function. The drop shadow offset can be modified using the setOffset() function and the blur radius of the drop shadow can be changed with the setBlurRadius() function.

By default, the drop shadow is a semi-transparent dark gray (QColor(63, 63, 63, 180)) shadow, blurred with a radius of 1 at an offset of 8 pixels towards the lower right. The drop shadow offset is specified in device coordinates.

See also QGraphicsBlurEffect, QGraphicsColorizeEffect, and QGraphicsOpacityEffect.

Описание свойств

blurRadius : qreal

This property holds the blur radius in pixels of the drop shadow.

Using a smaller radius results in a sharper shadow, whereas using a bigger radius results in a more blurred shadow.

By default, the blur radius is 1 pixel.

Функции доступа:

Сигнал извещателя (Notifier):

See also color(), offset(), and ..

color : QColor

This property holds the color of the drop shadow.

By default, the drop color is a semi-transparent dark gray (QColor(63, 63, 63, 180)).

Функции доступа:

Сигнал извещателя (Notifier):

See also offset() and blurRadius().

offset : QPointF

This property holds the shadow offset in pixels.

By default, the offset is 8 pixels towards the lower right.

The offset is given in device coordinates, which means it is unaffected by scale.

Функции доступа:

Сигнал извещателя (Notifier):

See also xOffset(), yOffset(), blurRadius(), and color().

xOffset : qreal

This property holds the horizontal shadow offset in pixels.

By default, the horizontal shadow offset is 8 pixels.

Функции доступа:

Сигнал извещателя (Notifier):

See also yOffset() and offset().

yOffset : qreal

This property holds the vertical shadow offset in pixels.

By default, the vertical shadow offset is 8 pixels.

Функции доступа:

Сигнал извещателя (Notifier):

See also xOffset() and offset().

Описание функций-членов

QGraphicsDropShadowEffect::QGraphicsDropShadowEffect ( QObject * parent = 0 )

Constructs a new QGraphicsDropShadowEffect instance. The parent parameter is passed to QGraphicsEffect's constructor.

QGraphicsDropShadowEffect::~QGraphicsDropShadowEffect ()

Destroys the effect.

void QGraphicsDropShadowEffect::blurRadiusChanged ( qreal blurRadius )   [signal]

This signal is emitted whenever the effect's blur radius changes. The blurRadius parameter holds the effect's new blur radius.

QRectF QGraphicsDropShadowEffect::boundingRectFor ( const QRectF & rect ) const   [virtual]

Reimplemented from QGraphicsEffect::boundingRectFor().

void QGraphicsDropShadowEffect::colorChanged ( const QColor & color )   [signal]

This signal is emitted whenever the effect's color changes. The color parameter holds the effect's new color.

void QGraphicsDropShadowEffect::draw ( QPainter * painter )   [virtual protected]

Reimplemented from QGraphicsEffect::draw().

void QGraphicsDropShadowEffect::offsetChanged ( const QPointF & offset )   [signal]

This signal is emitted whenever the effect's shadow offset changes. The offset parameter holds the effect's new shadow offset.