#include "cropscene.hpp" #include #include #include #include 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); }); } 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()); }