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#include "cropscene.hpp"
#include <QDebug>
#include <QGraphicsPolygonItem>
#include <QGraphicsView>
#include <QTimer>
CropScene::CropScene(QObject *parent) : QGraphicsScene(parent), prevButtons(Qt::NoButton)
{
QTimer::singleShot(0, [&] {
QPolygonF poly;
poly.append(sceneRect().topLeft());
poly.append(sceneRect().topRight());
poly.append(sceneRect().bottomRight());
poly.append(sceneRect().bottomLeft());
polyItem = new QGraphicsPolygonItem(poly);
polyItem->setBrush(QBrush(QColor(0, 0, 0, 191)));
polyItem->setPen(QPen(Qt::NoPen));
addItem(polyItem);
});
}
CropScene::~CropScene()
{
delete rect;
}
void CropScene::mouseMoveEvent(QGraphicsSceneMouseEvent *e)
{
auto buttons = e->buttons();
if (buttons == Qt::LeftButton || prevButtons == Qt::NoButton)
{
QPointF p = e->scenePos();
if (rect == nullptr)
{
rect = new QGraphicsRectItem(p.x(), p.y(), 1, 1);
initPos = p;
QPen pen(Qt::NoBrush, 1);
pen.setColor(Qt::cyan);
rect->setPen(pen);
addItem(rect);
}
else
{
if (prevButtons == Qt::NoButton)
{
initPos = p;
rect->setRect(p.x(), p.y(), 1, 1);
}
else
{
rect->setRect(QRect(qMin(initPos.x(), p.x()), qMin(initPos.y(), p.y()), qAbs(initPos.x() - p.x()),
qAbs(initPos.y() - p.y())));
}
}
QPolygonF poly;
QPointF theMagicWikipediaPoint(rect->rect().right(), sceneRect().bottom());
poly << sceneRect().topLeft();
poly << sceneRect().topRight();
poly << sceneRect().bottomRight();
poly << theMagicWikipediaPoint;
poly << rect->rect().bottomRight();
poly << rect->rect().topRight();
poly << rect->rect().topLeft();
poly << rect->rect().bottomLeft();
poly << rect->rect().bottomRight();
poly << theMagicWikipediaPoint;
poly << sceneRect().bottomLeft();
poly << sceneRect().topLeft();
this->polyItem->setPolygon(poly);
e->accept();
}
else
QGraphicsScene::mouseMoveEvent(e);
prevButtons = buttons;
}
void CropScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e)
{
prevButtons = Qt::NoButton;
QGraphicsScene::mouseReleaseEvent(e);
}
void CropScene::keyReleaseEvent(QKeyEvent *event)
{
if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter) done();
}
void CropScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *e)
{
done();
QGraphicsScene::mouseDoubleClickEvent(e);
}
void CropScene::done()
{
for (QGraphicsView *v : views()) v->close();
emit closedWithRect(rect != nullptr ? rect->rect().toRect() : QRect());
}