1、为图层添加渲染器和读取器，分离图层基础信息、渲染和读写；
2、LayerTreeLayerNode持有MapLayer图层引用，为右键菜单做准备； 3、改名：imageviewer → mapcavas，mapcavas持有MapLayer图层引用，为刷新图像做准备；
This commit is contained in:
tangchao0503
@ -5,240 +5,217 @@
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#include <QPoint>
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#include "ImageViewer.h"
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#include "RasterLayer.h"
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#define VIEW_CENTER viewport()->rect().center()
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#define VIEW_WIDTH viewport()->rect().width()
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#define VIEW_HEIGHT viewport()->rect().height()
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ImageViewer::ImageViewer(QWidget* pParent) :QGraphicsView(pParent)
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mapcavas::mapcavas(QWidget* pParent) :QGraphicsView(pParent)
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{
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setRenderHint(QPainter::Antialiasing);
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setRenderHint(QPainter::SmoothPixmapTransform);
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setDragMode(QGraphicsView::ScrollHandDrag);
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setRenderHint(QPainter::Antialiasing);
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setRenderHint(QPainter::SmoothPixmapTransform);
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setDragMode(QGraphicsView::ScrollHandDrag);
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// <20>ؼ<EFBFBD><D8BC>㣺<EFBFBD><E3A3BA>ʹ<EFBFBD><EFBFBD> Qt Ĭ<>ϵ<EFBFBD> anchor<6F><72><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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setTransformationAnchor(QGraphicsView::NoAnchor);
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setResizeAnchor(QGraphicsView::NoAnchor);
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// ʹ<EFBFBD><EFBFBD> Qt Ĭ<><C4AC> anchor <EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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setTransformationAnchor(QGraphicsView::NoAnchor);
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setResizeAnchor(QGraphicsView::NoAnchor);
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m_qtGraphicsScene = new QGraphicsScene(this);
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this->setScene(m_qtGraphicsScene);
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m_qtGraphicsScene->setSceneRect(-1e6, -1e6, 2e6, 2e6);
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m_qtGraphicsScene = new QGraphicsScene(this);
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this->setScene(m_qtGraphicsScene);
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m_qtGraphicsScene->setSceneRect(-1e6, -1e6, 2e6, 2e6);
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m_framNumberLabel = new QLabel(this);
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m_framNumberLabel->setAlignment(Qt::AlignHCenter);
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m_framNumberLabel->setAlignment(Qt::AlignVCenter);
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m_framNumberLabel = new QLabel(this);
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m_framNumberLabel->setAlignment(Qt::AlignHCenter);
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m_framNumberLabel->setAlignment(Qt::AlignVCenter);
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QFont ft;
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ft.setPointSize(14);
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m_framNumberLabel->setFont(ft);
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QFont ft;
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ft.setPointSize(14);
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m_framNumberLabel->setFont(ft);
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m_framNumberLabel->setText("0");
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m_GraphicsPixmapItemHandle = nullptr;
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m_GraphicsPixmapItemHandle = nullptr;
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m_scale = 1.0;
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m_zoomDelta = 0.1;
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m_translateSpeed = 1.0;
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m_bMouseTranslate = false;
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m_scale = 1.0;
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m_zoomDelta = 0.1;
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m_translateSpeed = 1.0;
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m_bMouseTranslate = false;
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setFrameShape(QFrame::NoFrame);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setFrameShape(QFrame::NoFrame);
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}
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ImageViewer::~ImageViewer()
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mapcavas::~mapcavas()
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{
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}
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void ImageViewer::DisplayFrameNumber(int frameNumber)
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void mapcavas::DisplayFrameNumber(int frameNumber)
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{
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m_framNumberLabel->setText(QString::number(frameNumber));
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m_framNumberLabel->adjustSize();
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m_framNumberLabel->setText(QString::number(frameNumber));
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m_framNumberLabel->adjustSize();
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}
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void ImageViewer::SetImage(QPixmap *image)
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void mapcavas::SetImage(QPixmap *image)
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{
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if (!HasImage())
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{
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m_GraphicsPixmapItemHandle = m_qtGraphicsScene->addPixmap(*image);
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}
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else
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{
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m_GraphicsPixmapItemHandle->setPixmap(*image);
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}
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ensureSceneVisible();
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if (!HasImage())
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{
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m_GraphicsPixmapItemHandle = m_qtGraphicsScene->addPixmap(*image);
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}
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else
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{
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m_GraphicsPixmapItemHandle->setPixmap(*image);
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}
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ensureSceneVisible();
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}
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void ImageViewer::ensureSceneVisible()
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void mapcavas::ensureSceneVisible()
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{
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resetTransform();
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resetTransform();
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auto view_rect = viewport()->rect();
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auto scene_rect = this->scene()->itemsBoundingRect();
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auto view_rect = viewport()->rect();
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auto scene_rect = this->scene()->itemsBoundingRect();
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double x_ratio = view_rect.width() / scene_rect.width();
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double y_ratio = view_rect.height() / scene_rect.height();
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double scale_factor = std::min(x_ratio, y_ratio) * 0.9;
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double x_ratio = view_rect.width() / scene_rect.width();
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double y_ratio = view_rect.height() / scene_rect.height();
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double scale_factor = std::min(x_ratio, y_ratio) * 0.9;
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scale(scale_factor, scale_factor);
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m_scale *= scale_factor;
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scale(scale_factor, scale_factor);
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m_scale *= scale_factor;
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centerOn(scene_rect.center());
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centerOn(scene_rect.center());
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}
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bool ImageViewer::HasImage()
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bool mapcavas::HasImage()
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{
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if (m_GraphicsPixmapItemHandle == nullptr)
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{
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return false;
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}
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else
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{
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return true;
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}
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if (m_GraphicsPixmapItemHandle == nullptr)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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void ImageViewer::wheelEvent(QWheelEvent *event)
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void mapcavas::wheelEvent(QWheelEvent *event)
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{
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//qDebug() << "---------------+++++++++++++++++++++++++++++++++++++++++++++++++++ ";
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//if (true)//HasImage()
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//{
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// //Χ<><CEA7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŵ<EFBFBD><C5B4><EFBFBD>https://blog.csdn.net/GoForwardToStep/article/details/77035287?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.channel_param
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// // <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>view<65><77>λ<EFBFBD><CEBB>;
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// QPointF cursorPoint = event->pos();
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// // <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>scene<6E><65>λ<EFBFBD><CEBB>;
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// QPointF scenePos = this->mapToScene(QPoint(cursorPoint.x(), cursorPoint.y()));
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if (HasImage())
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{
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QPointF oldPos = mapToScene(event->pos());
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// // <20><>ȡview<65>Ŀ<EFBFBD><C4BF><EFBFBD>;
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// qreal viewWidth = this->viewport()->width();
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// qreal viewHeight = this->viewport()->height();
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QPoint scrollAmount = event->angleDelta();
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scrollAmount.y() > 0 ? zoomIn() : zoomOut();
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// // <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>λ<EFBFBD><CEBB><EFBFBD>൱<EFBFBD><E0B5B1>view<65><77>С<EFBFBD>ĺ<EFBFBD><C4BA>ݱ<EFBFBD><DDB1><EFBFBD>;
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// qreal hScale = cursorPoint.x() / viewWidth;
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// qreal vScale = cursorPoint.y() / viewHeight;
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QPointF newPos = mapToScene(event->pos());
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// // <20><><EFBFBD>ֵĹ<D6B5><C4B9><EFBFBD><EFBFBD><EFBFBD>
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// QPoint scrollAmount = event->angleDelta();
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// // <20><>ֵ<EFBFBD><D6B5>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD>Զ<EFBFBD><D4B6>ʹ<EFBFBD><CAB9><EFBFBD>߷Ŵ<DFB7><C5B4><EFBFBD>ֵ<EFBFBD><D6B5>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С
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// scrollAmount.y() > 0 ? zoomIn() : zoomOut();
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// // <20><>scene<6E><65><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>Ϊ<EFBFBD>Ŵ<EFBFBD><C5B4><EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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// QPointF viewPoint = this->matrix().map(scenePos);
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// // ͨ<><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>view<65>Ŵ<EFBFBD><C5B4><EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD>չʾscene<6E><65>λ<EFBFBD><CEBB>;
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// horizontalScrollBar()->setValue(int(viewPoint.x() - viewWidth * hScale));
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// verticalScrollBar()->setValue(int(viewPoint.y() - viewHeight * vScale));
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//}
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if (HasImage())
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{
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QPointF oldPos = mapToScene(event->pos());
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QPoint scrollAmount = event->angleDelta();
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scrollAmount.y() > 0 ? zoomIn() : zoomOut();
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QPointF newPos = mapToScene(event->pos());
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QPointF delta = newPos - oldPos;
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translate(delta.x(), delta.y());
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}
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//QGraphicsView::wheelEvent(event);//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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QPointF delta = newPos - oldPos;
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translate(delta.x(), delta.y());
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}
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}
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void ImageViewer::scaling(qreal scaleFactor)
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void mapcavas::scaling(qreal scaleFactor)
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{
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//qDebug() << this->sceneRect();
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scale(scaleFactor, scaleFactor);
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scale(scaleFactor, scaleFactor);
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}
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void ImageViewer::mousePressEvent(QMouseEvent *event)
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void mapcavas::mousePressEvent(QMouseEvent *event)
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{
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if (event->button()==Qt::LeftButton)
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{
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m_bMouseTranslate = true;
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m_lastMousePos = event->pos();
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if (event->button()==Qt::LeftButton)
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{
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m_bMouseTranslate = true;
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m_lastMousePos = event->pos();
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//qDebug() << mapToScene(m_lastMousePos);
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emit leftMouseButtonPressed(mapToScene(m_lastMousePos).x(), mapToScene(m_lastMousePos).y());
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}
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//If you do not perform all the necessary work in your implementation of the virtual function, you may need to call the base class's implementation.
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QGraphicsView::mousePressEvent(event);
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emit leftMouseButtonPressed(mapToScene(m_lastMousePos).x(), mapToScene(m_lastMousePos).y());
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}
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QGraphicsView::mousePressEvent(event);
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}
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void ImageViewer::mouseMoveEvent(QMouseEvent *event)
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void mapcavas::mouseMoveEvent(QMouseEvent *event)
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{
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if (m_bMouseTranslate){
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QPointF mouseDelta = mapToScene(event->pos()) - mapToScene(m_lastMousePos);
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translate(mouseDelta.x(),mouseDelta.y());
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}
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if (m_bMouseTranslate){
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QPointF mouseDelta = mapToScene(event->pos()) - mapToScene(m_lastMousePos);
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translate(mouseDelta.x(),mouseDelta.y());
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}
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m_lastMousePos = event->pos();
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QGraphicsView::mousePressEvent(event);
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m_lastMousePos = event->pos();
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QGraphicsView::mousePressEvent(event);
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}
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void ImageViewer::mouseReleaseEvent(QMouseEvent *event)
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void mapcavas::mouseReleaseEvent(QMouseEvent *event)
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{
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m_bMouseTranslate = false;
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QGraphicsView::mouseReleaseEvent(event);
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m_bMouseTranslate = false;
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QGraphicsView::mouseReleaseEvent(event);
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}
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void ImageViewer::mouseDoubleClickEvent(QMouseEvent *event)
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void mapcavas::mouseDoubleClickEvent(QMouseEvent *event)
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{
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QGraphicsView::mouseDoubleClickEvent(event);
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QGraphicsView::mouseDoubleClickEvent(event);
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}
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void ImageViewer::zoomIn()
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void mapcavas::zoomIn()
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{
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zoom(1 + m_zoomDelta);
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zoom(1 + m_zoomDelta);
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}
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void ImageViewer::zoomOut()
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void mapcavas::zoomOut()
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{
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zoom(1 - m_zoomDelta);
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zoom(1 - m_zoomDelta);
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}
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void ImageViewer::zoom(float scaleFactor)
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void mapcavas::zoom(float scaleFactor)
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{
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// <20><>ֹ<EFBFBD><D6B9>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
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if (factor < 0.07 || factor > 100)
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return;
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qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
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if (factor < 0.07 || factor > 100)
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return;
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scale(scaleFactor, scaleFactor);
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m_scale *= scaleFactor;
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scale(scaleFactor, scaleFactor);
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m_scale *= scaleFactor;
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}
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void ImageViewer::setTranslateSpeed(qreal speed)
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void mapcavas::setTranslateSpeed(qreal speed)
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{
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// <20><><EFBFBD><EFBFBD><EFBFBD>ٶȷ<D9B6>Χ
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Q_ASSERT_X(speed >= 0.0 && speed <= 2.0,
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"InteractiveView::setTranslateSpeed", "Speed should be in range [0.0, 2.0].");
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m_translateSpeed = speed;
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Q_ASSERT_X(speed >= 0.0 && speed <= 2.0,
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"InteractiveView::setTranslateSpeed", "Speed should be in range [0.0, 2.0].");
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m_translateSpeed = speed;
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}
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qreal ImageViewer::translateSpeed() const
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qreal mapcavas::translateSpeed() const
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{
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return m_translateSpeed;
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return m_translateSpeed;
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}
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void ImageViewer::setZoomDelta(qreal delta)
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void mapcavas::setZoomDelta(qreal delta)
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{
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ
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Q_ASSERT_X(delta >= 0.0 && delta <= 1.0,
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"InteractiveView::setZoomDelta", "Delta should be in range [0.0, 1.0].");
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m_zoomDelta = delta;
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Q_ASSERT_X(delta >= 0.0 && delta <= 1.0,
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"InteractiveView::setZoomDelta", "Delta should be in range [0.0, 1.0].");
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m_zoomDelta = delta;
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}
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qreal ImageViewer::zoomDelta() const
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qreal mapcavas::zoomDelta() const
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{
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return m_zoomDelta;
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return m_zoomDelta;
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}
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// new: set associated raster layer
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void mapcavas::setLayers(RasterLayer* layer)
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{
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m_rasterLayer = layer;
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}
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// new: refresh the map by rendering using the RasterLayer's render method
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void mapcavas::freshmap()
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{
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if (!m_rasterLayer) return;
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RasterLayer::RenderParams params; // default params; could be extended
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QImage img = m_rasterLayer->render(params);
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if (img.isNull()) return;
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QPixmap pm = QPixmap::fromImage(img);
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SetImage(&pm);
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}
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