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#pragma once
#include <QColor>
#include <QLinearGradient>
#include <QPainter>
class DropShadow
{
public:
static void draw(QPainter &painter,
qint16 margin,
qreal radius,
QColor start,
QColor end,
qreal startPosition,
qreal endPosition0,
qreal endPosition1,
qreal width,
qreal height)
{
painter.setPen(Qt::NoPen);
QLinearGradient gradient;
gradient.setColorAt(startPosition, start);
gradient.setColorAt(endPosition0, end);
// Right
QPointF right0(width - margin, height / 2);
QPointF right1(width, height / 2);
gradient.setStart(right0);
gradient.setFinalStop(right1);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(QPointF(width - margin * radius, margin), QPointF(width, height - margin)), 0.0, 0.0);
// Left
QPointF left0(margin, height / 2);
QPointF left1(0, height / 2);
gradient.setStart(left0);
gradient.setFinalStop(left1);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(QPointF(margin * radius, margin), QPointF(0, height - margin)), 0.0, 0.0);
// Top
QPointF top0(width / 2, margin);
QPointF top1(width / 2, 0);
gradient.setStart(top0);
gradient.setFinalStop(top1);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(QPointF(width - margin, 0), QPointF(margin, margin)), 0.0, 0.0);
// Bottom
QPointF bottom0(width / 2, height - margin);
QPointF bottom1(width / 2, height);
gradient.setStart(bottom0);
gradient.setFinalStop(bottom1);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(QPointF(margin, height - margin), QPointF(width - margin, height)), 0.0, 0.0);
// BottomRight
QPointF bottomright0(width - margin, height - margin);
QPointF bottomright1(width, height);
gradient.setStart(bottomright0);
gradient.setFinalStop(bottomright1);
gradient.setColorAt(endPosition1, end);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(bottomright0, bottomright1), 0.0, 0.0);
// BottomLeft
QPointF bottomleft0(margin, height - margin);
QPointF bottomleft1(0, height);
gradient.setStart(bottomleft0);
gradient.setFinalStop(bottomleft1);
gradient.setColorAt(endPosition1, end);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(bottomleft0, bottomleft1), 0.0, 0.0);
// TopLeft
QPointF topleft0(margin, margin);
QPointF topleft1(0, 0);
gradient.setStart(topleft0);
gradient.setFinalStop(topleft1);
gradient.setColorAt(endPosition1, end);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(topleft0, topleft1), 0.0, 0.0);
// TopRight
QPointF topright0(width - margin, margin);
QPointF topright1(width, 0);
gradient.setStart(topright0);
gradient.setFinalStop(topright1);
gradient.setColorAt(endPosition1, end);
painter.setBrush(QBrush(gradient));
painter.drawRoundRect(QRectF(topright0, topright1), 0.0, 0.0);
// Widget
painter.setBrush(QBrush("#FFFFFF"));
painter.setRenderHint(QPainter::Antialiasing);
painter.drawRoundRect(QRectF(QPointF(margin, margin), QPointF(width - margin, height - margin)), radius, radius);
}
};
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