move custom shadow effect class to lib/
This commit is contained in:
parent
6e7bed7a5c
commit
105478a635
|
@ -1,76 +0,0 @@
|
|||
#include "customshadoweffect.h"
|
||||
#include <QPainter>
|
||||
|
||||
CustomShadowEffect::CustomShadowEffect(QObject *parent)
|
||||
: QGraphicsEffect(parent),
|
||||
_distance(4.0),
|
||||
_blurRadius(10.0),
|
||||
_color(0, 0, 0, 80)
|
||||
{
|
||||
}
|
||||
|
||||
QT_BEGIN_NAMESPACE
|
||||
extern Q_WIDGETS_EXPORT void qt_blurImage(QPainter *p, QImage &blurImage, qreal radius, bool quality, bool alphaOnly, int transposed = 0);
|
||||
QT_END_NAMESPACE
|
||||
|
||||
void CustomShadowEffect::draw(QPainter* painter)
|
||||
{
|
||||
// if nothing to show outside the item, just draw source
|
||||
if ((blurRadius() + distance()) <= 0) {
|
||||
drawSource(painter);
|
||||
return;
|
||||
}
|
||||
|
||||
PixmapPadMode mode = QGraphicsEffect::PadToEffectiveBoundingRect;
|
||||
QPoint offset;
|
||||
const QPixmap px = sourcePixmap(Qt::DeviceCoordinates, &offset, mode);
|
||||
|
||||
// return if no source
|
||||
if (px.isNull())
|
||||
return;
|
||||
|
||||
// save world transform
|
||||
QTransform restoreTransform = painter->worldTransform();
|
||||
painter->setWorldTransform(QTransform());
|
||||
|
||||
// Calculate size for the background image
|
||||
QSize szi(px.size().width() + 2 * distance(), px.size().height() + 2 * distance());
|
||||
|
||||
QImage tmp(szi, QImage::Format_ARGB32_Premultiplied);
|
||||
QPixmap scaled = px.scaled(szi);
|
||||
tmp.fill(0);
|
||||
QPainter tmpPainter(&tmp);
|
||||
tmpPainter.setCompositionMode(QPainter::CompositionMode_Source);
|
||||
tmpPainter.drawPixmap(QPointF(-distance(), -distance()), scaled);
|
||||
tmpPainter.end();
|
||||
|
||||
// blur the alpha channel
|
||||
QImage blurred(tmp.size(), QImage::Format_ARGB32_Premultiplied);
|
||||
blurred.fill(0);
|
||||
QPainter blurPainter(&blurred);
|
||||
qt_blurImage(&blurPainter, tmp, blurRadius(), false, true);
|
||||
blurPainter.end();
|
||||
|
||||
tmp = blurred;
|
||||
|
||||
// blacken the image...
|
||||
tmpPainter.begin(&tmp);
|
||||
tmpPainter.setCompositionMode(QPainter::CompositionMode_SourceIn);
|
||||
tmpPainter.fillRect(tmp.rect(), color());
|
||||
tmpPainter.end();
|
||||
|
||||
// draw the blurred shadow...
|
||||
painter->drawImage(offset, tmp);
|
||||
|
||||
// draw the actual pixmap...
|
||||
painter->drawPixmap(offset, px, QRectF());
|
||||
|
||||
// restore world transform
|
||||
painter->setWorldTransform(restoreTransform);
|
||||
}
|
||||
|
||||
QRectF CustomShadowEffect::boundingRectFor(const QRectF& rect) const
|
||||
{
|
||||
const qreal delta = blurRadius() + distance();
|
||||
return rect.united(rect.adjusted(-delta, -delta, delta, delta));
|
||||
}
|
|
@ -1,33 +0,0 @@
|
|||
/*
|
||||
* http://stackoverflow.com/questions/23718827/qt-shadow-around-window
|
||||
*/
|
||||
#ifndef CUSTOMSHADOWEFFECT_H
|
||||
#define CUSTOMSHADOWEFFECT_H
|
||||
|
||||
#include <QGraphicsEffect>
|
||||
|
||||
class CustomShadowEffect : public QGraphicsEffect
|
||||
{
|
||||
Q_OBJECT
|
||||
public:
|
||||
explicit CustomShadowEffect(QObject *parent = 0);
|
||||
|
||||
void draw(QPainter *painter);
|
||||
QRectF boundingRectFor(const QRectF &rect) const;
|
||||
|
||||
inline void setDistance(qreal distance) { _distance = distance; updateBoundingRect(); }
|
||||
inline qreal distance() const { return _distance; }
|
||||
|
||||
inline void setBlurRadius(qreal blurRadius) { _blurRadius = blurRadius; updateBoundingRect(); }
|
||||
inline qreal blurRadius() const { return _blurRadius; }
|
||||
|
||||
inline void setColor(const QColor &color) { _color = color; }
|
||||
inline QColor color() const { return _color; }
|
||||
|
||||
private:
|
||||
qreal _distance;
|
||||
qreal _blurRadius;
|
||||
QColor _color;
|
||||
};
|
||||
|
||||
#endif // CUSTOMSHADOWEFFECT_H
|
Loading…
Reference in New Issue