241 lines
6.9 KiB
C++
241 lines
6.9 KiB
C++
#include "mygraphicsview.h"
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MyGraphicsView::MyGraphicsView()
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{
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m_viewSize = this->size();
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m_scene = new MyGraphicsScene();
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this->setScene(m_scene);
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setMouseTracking(true); // 跟踪鼠标位置
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// this->setRenderHint(QPainter::Antialiasing, true);
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// this->setRenderHint(QPainter::SmoothPixmapTransform, true);//防锯齿
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}
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MyGraphicsView::~MyGraphicsView()
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{
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if(m_scene != NULL)
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{
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delete m_scene;
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m_scene = NULL;
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}
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}
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void MyGraphicsView::resizeEvent(QResizeEvent *event)
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{
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if(event == NULL){}//为了去掉警告
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if(m_scene != NULL && m_viewSize != this->size())
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{
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QRectF rectItem = m_scene->itemsBoundingRect();
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this->setScene(m_scene);
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this->fitInView(rectItem, Qt::KeepAspectRatio);
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}
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m_viewSize = this->size();
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}
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void MyGraphicsView::mouseDoubleClickEvent(QMouseEvent *event)
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{
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qreal scaleFactor = this->matrix().m11();
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if(scaleFactor >= 20){return;}
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if(event->button() == Qt::LeftButton &&
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event->type() == QEvent::MouseButtonDblClick)
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{
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setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
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scale(2.0, 2.0);
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}
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if(event->button() == Qt::RightButton &&
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event->type() == QEvent::MouseButtonDblClick)
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{
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QRectF rectItem = m_scene->itemsBoundingRect();
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this->fitInView(rectItem, Qt::KeepAspectRatio);
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}
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}
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void MyGraphicsView::mousePressEvent(QMouseEvent *event)
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{
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if(event->button() == Qt::LeftButton)
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{
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setDragMode(QGraphicsView::RubberBandDrag);
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m_leftBtnPressed = true;
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m_startPoint = m_endPoint = event->pos();
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}
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else
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{
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setDragMode(QGraphicsView::NoDrag);
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}
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if(event->button() == Qt::RightButton)
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{
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m_startPoint = event->pos();
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m_rightBtnPressed = true;
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}
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QGraphicsView::mousePressEvent(event);
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}
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//恢复原状
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void MyGraphicsView::mouseReleaseEvent(QMouseEvent *event)
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{
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if(event->button() == Qt::LeftButton)
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{
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m_leftBtnPressed = false;
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if(m_startPoint.x() == m_endPoint.x() || m_startPoint.y() == m_endPoint.y())
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{
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return;
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}
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double cx = (m_endPoint.x() + m_startPoint.x()) / 2.0;
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double cy = (m_endPoint.y() + m_startPoint.y()) / 2.0;
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// 获取当前鼠标相对于scene的位置;
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QPointF scenePos = this->mapToScene(QPoint(cx,cy));
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// 获取view的宽高;
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qreal viewWidth = this->viewport()->width();
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qreal viewHeight = this->viewport()->height();
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// 获取当前鼠标位置相当于view大小的横纵比例;
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qreal hScale = cx / viewWidth;
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qreal vScale = cy / viewHeight;
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this->scale(2.0, 2.0);
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// 将scene坐标转换为放大缩小后的坐标;
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QPointF viewPoint = this->matrix().map(scenePos);
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// 通过滚动条控制view放大缩小后的展示scene的位置;
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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(event->button() == Qt::RightButton)
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{
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m_rightBtnPressed = false;
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}
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}
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void MyGraphicsView::mouseMoveEvent(QMouseEvent *event)
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{
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//QGraphicsView坐标
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QPoint viewPoint = event->pos();
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//QGraphicsScene坐标
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QPointF scenePoint = mapToScene(viewPoint);
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// double x = scenePoint.x() / MMPIXELY;
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// double y = abs(abs(scenePoint.y()) - m_scene->itemsBoundingRect().height()) / MMPIXELY;
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double x = (scenePoint.x() - DRAWMARGINS/2.0) / MMPIXELY;
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double y = (m_scene->itemsBoundingRect().height() - scenePoint.y() + DRAWMARGINS/2.0) / MMPIXELY;
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scenePoint.setX(x);
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scenePoint.setY(y);
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setMouseTracking(true);
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siMouseMove(scenePoint);
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if(m_leftBtnPressed)
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{
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m_endPoint = event->pos();
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}
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if(m_rightBtnPressed)
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{
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QPoint delta = m_startPoint - event->pos();
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int hValue = horizontalScrollBar()->value();
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int vValue = verticalScrollBar()->value();
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horizontalScrollBar()->setValue(delta.x() + hValue);
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verticalScrollBar()->setValue(delta.y() + vValue);
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m_startPoint = event->pos();
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}
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QGraphicsView::mouseMoveEvent(event);
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}
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void MyGraphicsView::wheelEvent(QWheelEvent *event)
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{
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// 获取当前鼠标相对于view的位置;
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QPointF cursorPoint = event->pos();
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// 获取当前鼠标相对于scene的位置;
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QPointF scenePos = this->mapToScene(QPoint(cursorPoint.x(), cursorPoint.y()));
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// 获取view的宽高;
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qreal viewWidth = this->viewport()->width();
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qreal viewHeight = this->viewport()->height();
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// 获取当前鼠标位置相当于view大小的横纵比例;
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qreal hScale = cursorPoint.x() / viewWidth;
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qreal vScale = cursorPoint.y() / viewHeight;
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int wheelDeltaValue = event->delta();
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// 向上滚动，放大;
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if (wheelDeltaValue > 0)
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{
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this->scale(1.2, 1.2);
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}
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// 向下滚动，缩小;
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else
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{
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this->scale(1.0 / 1.2, 1.0 / 1.2);
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}
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// 将scene坐标转换为放大缩小后的坐标;
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QPointF viewPoint = this->matrix().map(scenePos);
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// 通过滚动条控制view放大缩小后的展示scene的位置;
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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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CreatPictureStr MyGraphicsView::getPictureByDat(Marker marker,int paperWidth,int butSpace,int rightSpace,int penWidth)
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{
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CreatPictureStr picStr;
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if(m_scene != NULL)
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{
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picStr = m_scene->getPictureByDat(marker,paperWidth,butSpace,rightSpace,penWidth);
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m_scene->addItemToScene();
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QRectF rectItem = m_scene->itemsBoundingRect();
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this->fitInView(rectItem, Qt::KeepAspectRatio);
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}
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return picStr;
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}
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CreatPictureStr MyGraphicsView::getPictureByBmp(QPixmap pixmap,int paperWidth,int butSpace,int rightSpace,int penWidth)
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{
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CreatPictureStr picStr;
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if(m_scene != NULL)
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{
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picStr = m_scene->getPictureByBmp(pixmap,paperWidth,butSpace,rightSpace,penWidth);
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m_scene->addItemToScene();
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QRectF rectItem = m_scene->itemsBoundingRect();
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this->fitInView(rectItem, Qt::KeepAspectRatio);
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}
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return picStr;
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}
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void MyGraphicsView::cleanView()
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{
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if(m_scene != NULL)
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{
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//这里delete掉再重新new是因为view显示完大图再显示小图，图形会不居中，未找到其他解决方法
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delete m_scene;
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m_scene = NULL;
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m_scene = new MyGraphicsScene();
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this->setScene(m_scene);
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}
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}
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void MyGraphicsView::swithViewByPic(QPicture pic)
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{
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if(m_scene != NULL)
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{
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m_scene->swithSceneByPic(pic);
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QRectF rectItem = m_scene->itemsBoundingRect();
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this->fitInView(rectItem, Qt::KeepAspectRatio);
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}
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}
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void MyGraphicsView::reflushBlockView(QPoint p)
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{
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if(m_scene != NULL)
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{
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m_scene->reflushBlockScene(p);
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}
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}
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