squawk/ui/utils/dropshadoweffect.h

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DROPSHADOWEFFECT_H
#define DROPSHADOWEFFECT_H
#include <QGraphicsEffect>
#include <QPainter>
#include <QPointF>
#include <QColor>
class PixmapFilter : public QObject
{
Q_OBJECT
public:
PixmapFilter(QObject *parent = nullptr);
virtual ~PixmapFilter() = 0;
virtual QRectF boundingRectFor(const QRectF &rect) const;
virtual void draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF &srcRect = QRectF()) const = 0;
};
class PixmapDropShadowFilter : public PixmapFilter
{
Q_OBJECT
public:
PixmapDropShadowFilter(QObject *parent = nullptr);
~PixmapDropShadowFilter();
void draw(QPainter *p, const QPointF &pos, const QPixmap &px, const QRectF &src = QRectF()) const override;
qreal blurRadius() const;
void setBlurRadius(qreal radius);
QColor color() const;
void setColor(const QColor &color);
qreal thickness() const;
void setThickness(qreal thickness);
void setFrame(bool top, bool right, bool bottom, bool left);
protected:
QColor mColor;
qreal mRadius;
qreal mThickness;
bool top;
bool right;
bool bottom;
bool left;
};
class DropShadowEffect : public QGraphicsEffect
{
Q_OBJECT
public:
qreal blurRadius() const;
QColor color() const;
void setFrame(bool top, bool right, bool bottom, bool left);
void setThickness(qreal thickness);
signals:
void blurRadiusChanged(qreal blurRadius);
void colorChanged(const QColor &color);
public slots:
void setBlurRadius(qreal blurRadius);
void setColor(const QColor &color);
protected:
void draw(QPainter * painter) override;
protected:
PixmapDropShadowFilter filter;
};
#endif // DROPSHADOWEFFECT_H