QGraphicsView截图.zip

#include "DrawItem.h" #include <QtGui> #include <QtWidgets/QGraphicsView> #include <QtWidgets/QGraphicsSceneMouseEvent> #include <QtWidgets/QStyleOption.h> //DrawItem::DrawItem() //{ //} // // //DrawItem::~DrawItem() //{ //} const int DEFAULT_HANDLE_RADIUS = 4; static qreal viewScale(const QGraphicsItem *const item) { qreal scale = 1; if (item->scene()) { QList<QGraphicsView *> views = item->scene()->views(); if (views.size() > 0) scale = views[0]->transform().m11(); } return scale; } DrawItem::DrawItem(QGraphicsItem *parent) : QAbstractGraphicsShapeItem(parent) { setFlag(ItemIsMovable, true); setFlag(ItemIsSelectable, true); setAcceptHoverEvents(true); setPen(QPen(Qt::red)); m_pressed = false; // m_nUsgaged = 0; // m_bResult = false; // m_strType = "Rect"; m_strUsage = tr(""); } void DrawItem::mousePressEvent(QGraphicsSceneMouseEvent * event) { if (event->button() == Qt::RightButton) { return; } QString strPos; bool bSelected = true; QPointF pos = this->scenePos(); //switch (type()) //{ //case UserType_Rect: //{ // RectItem *pItem = (RectItem*)this; // strPos = QString("Pos:(%1 , %2) Size(%3 , %4)").arg(QString::number(pos.x() - pItem->width() / 2)).arg(QString::number(pos.y() - pItem->height() / 2)).arg(QString::number(pItem->width())).arg(QString::number(pItem->height())); //} //break; //case UserType_RotateRect: //{ // RotateRectItem *pItem = (RotateRectItem*)this; // strPos = QString("Pos:(%1 , %2) Size:(%3 , %4) Rotate: %5").arg(QString::number(pos.x() - pItem->width() / 2)).arg(QString::number(pos.y() - pItem->height() / 2)).arg(QString::number(pItem->width())).arg(QString::number(pItem->height())).arg(QString::number(pItem->rotation())); //} //break; //case UserType_Ellipse: //{ // EllipseItem *pItem = (EllipseItem*)this; // strPos = QString("Pos:(%1 , %2) Size(%3 , %4)").arg(QString::number(pos.x() - pItem->width() / 2)).arg(QString::number(pos.y() - pItem->height() / 2)).arg(QString::number(pItem->width())).arg(QString::number(pItem->height())); //} //break; //case UserType_RotateEllipse: //{ // RotateEllipseItem *pItem = (RotateEllipseItem*)this; // strPos = QString("Pos:(%1 , %2) Size:(%3 , %4) Rotate: %5").arg(QString::number(pos.x() - pItem->width() / 2)).arg(QString::number(pos.y() - pItem->height() / 2)).arg(QString::number(pItem->width())).arg(QString::number(pItem->height())).arg(QString::number(pItem->rotation())); //} //break; //case UserType_Polygon: //{ // //bSelected = false; // PolygonItem *pItem = (PolygonItem*)this; // QPolygonF potf = pItem->polygon(); // foreach(QPointF pt, potf) // { // pt += pItem->scenePos(); // strPos += QString("(%1 ,%2),").arg(pt.x()).arg(pt.y()); // } //} //break; //case UserType_PolyLine: //{ // //bSelected = false; // PolylineItem *pItem = (PolylineItem*)this; // QPolygonF potf = pItem->polyline(); // foreach(QPointF pt, potf) // { // pt += pItem->scenePos(); // strPos += QString("(%1 ,%2),").arg(pt.x()).arg(pt.y()); // } //} //break; //case UserType_Line: //{ // LineItem *pItem = (LineItem*)this; // QLineF line = pItem->line(); // strPos = QString("Start:(%1 , %2) End:(%1 , %2)").arg(QString::number(line.p1().x())).arg(QString::number(line.p1().y())).arg(QString::number(line.p2().x())).arg(QString::number(line.p2().y())); //} //break; //case UserType_Point: //{ // strPos = QString("Pos:(%1 , %2)").arg(QString::number(pos.x())).arg(QString::number(pos.y())); //} //break; //case UserType_Circle: //{ // CircleItem *pItem = (CircleItem*)this; // strPos = QString("Pos:(%1 , %2) radius: %3").arg(QString::number(pos.x() - pItem->radius())).arg(QString::number(pos.y() - pItem->radius())).arg(QString::number(pItem->radius())); //} //break; //default: // bSelected = false; // break; //} if (bSelected) { if (tr("") != m_strUsage) strPos = m_strUsage + tr(" ") + strPos; foreach(QGraphicsItem *child, childItems()) { child->setVisible(true); child->installSceneEventFilter(this); } emit emitPosInfo(strPos); } } void DrawItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event) { foreach(QGraphicsItem *child, childItems()) { child->setVisible(true); child->installSceneEventFilter(this); } } void DrawItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event) { foreach(QGraphicsItem *child, childItems()) child->setVisible(false); } void DrawItem::preparePaint(QPainter *painter, const QStyleOptionGraphicsItem *option) { QPen oldPen = pen(); if (this->data(2).toBool()) { oldPen.setColor(Qt::red); oldPen.setWidth(0); } else { if (option->state & QStyle::State_Selected) { oldPen.setColor(Qt::yellow); oldPen.setWidth(0); } else if (this->data(1).toBool()) { oldPen.setColor(Qt::darkYellow);//wanghan add 1022 exclude ROI m_nUsaged =1； oldPen.setWidth(0); } else if (!this->data(1).toBool()) { oldPen.setColor(Qt::blue);//wanghan add 1022 included ROI为蓝色 m_nUsaged =1； oldPen.setWidth(0); } else { oldPen.setColor(Qt::green);//wanghan add 1022 ROI绿色 m_nUsaged =0; oldPen.setWidth(0); } } painter->setPen(oldPen); } QVariant DrawItem::itemChange(GraphicsItemChange change, const QVariant &value) { if (change == ItemSelectedHasChanged) { if (value.toBool()) setZValue(100); else updateZValue(); } return QGraphicsItem::itemChange(change, value); } RectBoundItem::RectBoundItem(QGraphicsItem *parent, Shape shape, bool rotatable) : DrawItem(parent), m_shape(shape), m_rotatable(rotatable) { m_rotation = 0; m_size = QSizeF(0, 0); /*m_handles.clear(); m_handles.push_back(new HandleItem(HandleItem::Role_ResizeTopLeft, this)); m_handles.push_back(new HandleItem(HandleItem::Role_ResizeTopRight, this)); m_handles.push_back(new HandleItem(HandleItem::Role_ResizeBottomLeft, this)); m_handles.push_back(new HandleItem(HandleItem::Role_ResizeBottomRight, this)); if (!m_rotatable && m_shape != Shape_Circle) { m_handles.push_back(new HandleItem(HandleItem::Role_ResizeTop, this)); m_handles.push_back(new HandleItem(HandleItem::Role_ResizeBottom, this)); m_handles.push_back(new HandleItem(HandleItem::Role_ResizeLeft, this)); m_handles.push_back(new HandleItem(HandleItem::Role_ResizeRight, this)); } else if (m_rotatable) { m_handles.push_back(new HandleItem(HandleItem::Role_RotateLeft, this)); m_handles.push_back(new HandleItem(HandleItem::Role_RotateTop, this)); m_handles.push_back(new HandleItem(HandleItem::Role_RotateRight, this)); m_handles.push_back(new HandleItem(HandleItem::Role_RotateBottom, this)); } */ /*if (rotatable) { foreach(HandleItem *handle, m_handles) { handle->setCursor(Qt::ArrowCursor); } }*/ setSize(QSizeF()); } RectBoundItem::~RectBoundItem() { /*foreach(HandleItem *handle, m_handles) { delete handle; handle = NULL; } m_handles.clear();*/ } void RectBoundItem::setSize(const QSizeF &size) { if (m_size == size && !m_rotatable) return; prepareGeometryChange(); m_size = size; updateZValue(); update(); //updateHandlePos(); } QRectF RectBoundItem::boundingRect() const { //qreal adjust = DEFAULT_HANDLE_RADIUS / viewScale(this); //return QRectF(-m_size.width() / 2, -m_size.height() / 2, m_size.width(), m_size.height()).adjusted(-adjust, -adjust, adjust, adjust); return QRectF(-m_size.width() / 2, -m_size.height() / 2, m_size.width(), m_size.height()); } void RectBoundItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget * widget) { preparePaint(painter, option); QRectF rect = QRectF(-m_size.width() / 2, -m_size.height() / 2, m_size.width(), m_size.height()); //if (m_shape == Shape_Rect) painter->drawRect