81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
#include "imageview.h"
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#include <QDebug>
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ImageView::ImageView(QWidget *parent)
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: QGraphicsView(parent),
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rubberBand(nullptr)
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{
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scene = new QGraphicsScene(this);
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setScene(scene);
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pximg = new QGraphicsPixmapItem();
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scene->addItem(pximg);
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setDragMode(QGraphicsView::NoDrag);
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setRenderHint(QPainter::Antialiasing);
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// 设置视图属性
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setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
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setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
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setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
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setResizeAnchor(QGraphicsView::AnchorUnderMouse);
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state = false;
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}
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void ImageView::mousePressEvent(QMouseEvent *event)
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{
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if (event->button() == Qt::LeftButton && pximg)
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{
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origin = event->pos();
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if (!rubberBand)
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rubberBand = new QRubberBand(QRubberBand::Rectangle, this);
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rubberBand->setGeometry(QRect(origin, QSize()));
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rubberBand->show();
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}
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if(event->button()==Qt::RightButton){
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state = false;
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}
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QGraphicsView::mousePressEvent(event);
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}
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void ImageView::mouseMoveEvent(QMouseEvent *event)
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{
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if (rubberBand && rubberBand->isVisible())
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{
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rubberBand->setGeometry(QRect(origin, event->pos()).normalized());
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}
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QGraphicsView::mouseMoveEvent(event);
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}
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void ImageView::mouseReleaseEvent(QMouseEvent *event)
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{
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if (event->button() == Qt::LeftButton && rubberBand && pximg)
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{
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rubberBand->hide();
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// 获取ROI区域（视图坐标）
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QRect roiRect = rubberBand->geometry();
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// 转换为场景坐标
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QPointF topLeft = mapToScene(roiRect.topLeft());
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QPointF bottomRight = mapToScene(roiRect.bottomRight());
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QRectF sceneRect(topLeft, bottomRight);
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// 确保在图片范围内
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QRectF imageRect = pximg->boundingRect();
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sceneRect = sceneRect.intersected(imageRect);
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if (!sceneRect.isEmpty())
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{
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// 发出信号
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qDebug()<<"跟踪清除";
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emit roiSelected(sceneRect);
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// qDebug() << "ROI Selected - Position:" << sceneRect.topLeft()
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// << "Size:" << sceneRect.size();
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}
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}
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QGraphicsView::mouseReleaseEvent(event);
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}
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