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// SPDX-FileCopyrightText: 2022 Gary Wang <wzc782970009@gmail.com>
//
// SPDX-License-Identifier: MIT
#include "graphicsscene.h"
#include "settings.h"
#include <QGraphicsSceneMouseEvent>
#include <QMimeData>
#include <QDebug>
#include <QGraphicsItem>
#include <QUrl>
#include <QGraphicsSvgItem>
#include <QSvgRenderer>
#include <QMovie>
#include <QPainter>
class PGraphicsPixmapItem : public QGraphicsPixmapItem
{
public:
PGraphicsPixmapItem(const QPixmap &pixmap, QGraphicsItem *parent = nullptr)
: QGraphicsPixmapItem(pixmap, parent)
{}
enum { Type = UserType + 1 };
int type() const override { return Type; }
void setScaleHint(float scaleHint) {
m_scaleHint = scaleHint;
}
const QPixmap & scaledPixmap(float scaleHint) {
if (qFuzzyCompare(scaleHint, m_cachedScaleHint)) return m_cachedPixmap;
QSizeF resizedScale(boundingRect().size());
resizedScale *= scaleHint;
QPixmap && sourcePixmap = pixmap();
m_cachedPixmap = sourcePixmap.scaled(
resizedScale.toSize() * sourcePixmap.devicePixelRatioF(),
Qt::KeepAspectRatio,
Qt::SmoothTransformation);
m_cachedScaleHint = scaleHint;
return m_cachedPixmap;
}
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget) override
{
if (transformationMode() == Qt::FastTransformation) {
return QGraphicsPixmapItem::paint(painter, option, widget);
} else {
// painter->setRenderHints(QPainter::Antialiasing);
painter->drawPixmap(QRectF(offset(), boundingRect().size()).toRect(),
scaledPixmap(m_scaleHint));
}
}
private:
float m_scaleHint = 1;
float m_cachedScaleHint = -1;
QPixmap m_cachedPixmap;
};
class PGraphicsMovieItem : public QGraphicsItem
{
public:
PGraphicsMovieItem(QGraphicsItem *parent = nullptr) : QGraphicsItem(parent) {}
enum { Type = UserType + 2 };
int type() const override { return Type; }
void setMovie(QMovie* movie) {
if (m_movie) m_movie->disconnect();
m_movie.reset(movie);
m_movie->connect(m_movie.data(), &QMovie::updated, [this](){
this->update();
});
}
QRectF boundingRect() const override {
if (m_movie) { return m_movie->frameRect(); }
else { return QRectF(); }
}
void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) override {
if (m_movie) {
painter->drawPixmap(m_movie->frameRect(), m_movie->currentPixmap(), m_movie->frameRect());
}
}
inline QMovie * movie() const {
return m_movie.data();
}
private:
QScopedPointer<QMovie> m_movie;
};
GraphicsScene::GraphicsScene(QObject *parent)
: QGraphicsScene(parent)
{
showText(tr("Drag image here"));
}
GraphicsScene::~GraphicsScene()
{
}
void GraphicsScene::showImage(const QPixmap &pixmap)
{
this->clear();
PGraphicsPixmapItem * pixmapItem = new PGraphicsPixmapItem(pixmap);
this->addItem(pixmapItem);
pixmapItem->setShapeMode(QGraphicsPixmapItem::BoundingRectShape);
m_theThing = pixmapItem;
this->setSceneRect(m_theThing->boundingRect());
}
void GraphicsScene::showText(const QString &text)
{
this->clear();
QGraphicsTextItem * textItem = this->addText(text);
textItem->setDefaultTextColor(QColor("White"));
m_theThing = textItem;
this->setSceneRect(m_theThing->boundingRect());
}
void GraphicsScene::showSvg(const QString &filepath)
{
this->clear();
QGraphicsSvgItem * svgItem = new QGraphicsSvgItem();
QSvgRenderer * render = new QSvgRenderer(svgItem);
#if QT_VERSION >= QT_VERSION_CHECK(6, 7, 0)
if (Settings::instance()->svgTiny12Only()) {
render->setOptions(QtSvg::Tiny12FeaturesOnly);
}
#endif // QT_VERSION >= QT_VERSION_CHECK(6, 7, 0)
render->load(filepath);
svgItem->setSharedRenderer(render);
this->addItem(svgItem);
m_theThing = svgItem;
this->setSceneRect(m_theThing->boundingRect());
}
void GraphicsScene::showAnimated(const QString &filepath)
{
this->clear();
PGraphicsMovieItem * animatedItem = new PGraphicsMovieItem();
QMovie * movie = new QMovie(filepath);
movie->start();
animatedItem->setMovie(movie);
this->addItem(animatedItem);
m_theThing = animatedItem;
this->setSceneRect(m_theThing->boundingRect());
}
bool GraphicsScene::trySetTransformationMode(Qt::TransformationMode mode, float scaleHint)
{
PGraphicsPixmapItem * pixmapItem = qgraphicsitem_cast<PGraphicsPixmapItem *>(m_theThing);
if (pixmapItem) {
pixmapItem->setTransformationMode(mode);
pixmapItem->setScaleHint(scaleHint);
return true;
}
return false;
}
bool GraphicsScene::togglePauseAnimation()
{
PGraphicsMovieItem * animatedItem = qgraphicsitem_cast<PGraphicsMovieItem *>(m_theThing);
if (animatedItem) {
animatedItem->movie()->setPaused(animatedItem->movie()->state() != QMovie::Paused);
return true;
}
return false;
}
bool GraphicsScene::skipAnimationFrame(int delta)
{
PGraphicsMovieItem * animatedItem = qgraphicsitem_cast<PGraphicsMovieItem *>(m_theThing);
if (animatedItem) {
const int frameCount = animatedItem->movie()->frameCount();
const int currentFrame = animatedItem->movie()->currentFrameNumber();
const int targetFrame = (currentFrame + delta) % frameCount;
animatedItem->movie()->setPaused(true);
return animatedItem->movie()->jumpToFrame(targetFrame);
}
return false;
}
QPixmap GraphicsScene::renderToPixmap()
{
PGraphicsPixmapItem * pixmapItem = qgraphicsitem_cast<PGraphicsPixmapItem *>(m_theThing);
if (pixmapItem) {
return pixmapItem->pixmap();
}
QPixmap pixmap(sceneRect().toRect().size());
pixmap.fill(Qt::transparent);
QPainter p(&pixmap);
render(&p, sceneRect());
return pixmap;
}
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