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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QGRAPHICSEFFECT_H
#define QGRAPHICSEFFECT_H
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtCore/qobject.h>
#include <QtCore/qpoint.h>
#include <QtCore/qrect.h>
#include <QtGui/qcolor.h>
#include <QtGui/qbrush.h>
QT_REQUIRE_CONFIG(graphicseffect);
QT_BEGIN_NAMESPACE
class QGraphicsItem;
class QStyleOption;
class QPainter;
class QPixmap;
class QGraphicsEffectSource;
class QGraphicsEffectPrivate;
class Q_WIDGETS_EXPORT QGraphicsEffect : public QObject
{
Q_OBJECT
Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)
public:
enum ChangeFlag {
SourceAttached = 0x1,
SourceDetached = 0x2,
SourceBoundingRectChanged = 0x4,
SourceInvalidated = 0x8
};
Q_DECLARE_FLAGS(ChangeFlags, ChangeFlag)
Q_FLAG(ChangeFlags)
enum PixmapPadMode {
NoPad,
PadToTransparentBorder,
PadToEffectiveBoundingRect
};
QGraphicsEffect(QObject *parent = nullptr);
virtual ~QGraphicsEffect();
virtual QRectF boundingRectFor(const QRectF &sourceRect) const;
QRectF boundingRect() const;
bool isEnabled() const;
public Q_SLOTS:
void setEnabled(bool enable);
void update();
Q_SIGNALS:
void enabledChanged(bool enabled);
protected:
QGraphicsEffect(QGraphicsEffectPrivate &d, QObject *parent = nullptr);
virtual void draw(QPainter *painter) = 0;
virtual void sourceChanged(ChangeFlags flags);
void updateBoundingRect();
bool sourceIsPixmap() const;
QRectF sourceBoundingRect(Qt::CoordinateSystem system = Qt::LogicalCoordinates) const;
void drawSource(QPainter *painter);
QPixmap sourcePixmap(Qt::CoordinateSystem system = Qt::LogicalCoordinates,
QPoint *offset = nullptr,
PixmapPadMode mode = PadToEffectiveBoundingRect) const;
private:
Q_DECLARE_PRIVATE(QGraphicsEffect)
Q_DISABLE_COPY(QGraphicsEffect)
friend class QGraphicsItem;
friend class QGraphicsItemPrivate;
friend class QGraphicsScenePrivate;
friend class QWidget;
friend class QWidgetPrivate;
public:
QGraphicsEffectSource *source() const; // internal
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsEffect::ChangeFlags)
class QGraphicsColorizeEffectPrivate;
class Q_WIDGETS_EXPORT QGraphicsColorizeEffect: public QGraphicsEffect
{
Q_OBJECT
Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged)
Q_PROPERTY(qreal strength READ strength WRITE setStrength NOTIFY strengthChanged)
public:
QGraphicsColorizeEffect(QObject *parent = nullptr);
~QGraphicsColorizeEffect();
QColor color() const;
qreal strength() const;
public Q_SLOTS:
void setColor(const QColor &c);
void setStrength(qreal strength);
Q_SIGNALS:
void colorChanged(const QColor &color);
void strengthChanged(qreal strength);
protected:
void draw(QPainter *painter) override;
private:
Q_DECLARE_PRIVATE(QGraphicsColorizeEffect)
Q_DISABLE_COPY(QGraphicsColorizeEffect)
};
class QGraphicsBlurEffectPrivate;
class Q_WIDGETS_EXPORT QGraphicsBlurEffect: public QGraphicsEffect
{
Q_OBJECT
Q_PROPERTY(qreal blurRadius READ blurRadius WRITE setBlurRadius NOTIFY blurRadiusChanged)
Q_PROPERTY(BlurHints blurHints READ blurHints WRITE setBlurHints NOTIFY blurHintsChanged)
public:
enum BlurHint {
PerformanceHint = 0x00,
QualityHint = 0x01,
AnimationHint = 0x02
};
Q_ENUM(BlurHint)
Q_DECLARE_FLAGS(BlurHints, BlurHint)
Q_FLAG(BlurHints)
QGraphicsBlurEffect(QObject *parent = nullptr);
~QGraphicsBlurEffect();
QRectF boundingRectFor(const QRectF &rect) const override;
qreal blurRadius() const;
BlurHints blurHints() const;
public Q_SLOTS:
void setBlurRadius(qreal blurRadius);
void setBlurHints(BlurHints hints);
Q_SIGNALS:
void blurRadiusChanged(qreal blurRadius);
void blurHintsChanged(BlurHints hints);
protected:
void draw(QPainter *painter) override;
private:
Q_DECLARE_PRIVATE(QGraphicsBlurEffect)
Q_DISABLE_COPY(QGraphicsBlurEffect)
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsBlurEffect::BlurHints)
class QGraphicsDropShadowEffectPrivate;
class Q_WIDGETS_EXPORT QGraphicsDropShadowEffect: public QGraphicsEffect
{
Q_OBJECT
Q_PROPERTY(QPointF offset READ offset WRITE setOffset NOTIFY offsetChanged)
Q_PROPERTY(qreal xOffset READ xOffset WRITE setXOffset NOTIFY offsetChanged)
Q_PROPERTY(qreal yOffset READ yOffset WRITE setYOffset NOTIFY offsetChanged)
Q_PROPERTY(qreal blurRadius READ blurRadius WRITE setBlurRadius NOTIFY blurRadiusChanged)
Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged)
public:
QGraphicsDropShadowEffect(QObject *parent = nullptr);
~QGraphicsDropShadowEffect();
QRectF boundingRectFor(const QRectF &rect) const override;
QPointF offset() const;
inline qreal xOffset() const
{ return offset().x(); }
inline qreal yOffset() const
{ return offset().y(); }
qreal blurRadius() const;
QColor color() const;
public Q_SLOTS:
void setOffset(const QPointF &ofs);
inline void setOffset(qreal dx, qreal dy)
{ setOffset(QPointF(dx, dy)); }
inline void setOffset(qreal d)
{ setOffset(QPointF(d, d)); }
inline void setXOffset(qreal dx)
{ setOffset(QPointF(dx, yOffset())); }
inline void setYOffset(qreal dy)
{ setOffset(QPointF(xOffset(), dy)); }
void setBlurRadius(qreal blurRadius);
void setColor(const QColor &color);
Q_SIGNALS:
void offsetChanged(const QPointF &offset);
void blurRadiusChanged(qreal blurRadius);
void colorChanged(const QColor &color);
protected:
void draw(QPainter *painter) override;
private:
Q_DECLARE_PRIVATE(QGraphicsDropShadowEffect)
Q_DISABLE_COPY(QGraphicsDropShadowEffect)
};
class QGraphicsOpacityEffectPrivate;
class Q_WIDGETS_EXPORT QGraphicsOpacityEffect: public QGraphicsEffect
{
Q_OBJECT
Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity NOTIFY opacityChanged)
Q_PROPERTY(QBrush opacityMask READ opacityMask WRITE setOpacityMask NOTIFY opacityMaskChanged)
public:
QGraphicsOpacityEffect(QObject *parent = nullptr);
~QGraphicsOpacityEffect();
qreal opacity() const;
QBrush opacityMask() const;
public Q_SLOTS:
void setOpacity(qreal opacity);
void setOpacityMask(const QBrush &mask);
Q_SIGNALS:
void opacityChanged(qreal opacity);
void opacityMaskChanged(const QBrush &mask);
protected:
void draw(QPainter *painter) override;
private:
Q_DECLARE_PRIVATE(QGraphicsOpacityEffect)
Q_DISABLE_COPY(QGraphicsOpacityEffect)
};
QT_END_NAMESPACE
#endif // QGRAPHICSEFFECT_H
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