TrainCamp_yanchaoyang_Two/IntegratedPlatform/hmiwidget.cpp

#include "hmiwidget.h"
#include <QDebug>
#include<QMenu>
#include<QGraphicsScene>
// ResizableShape 模板类的实现
template <typename BaseShape>
ResizableShape<BaseShape>::ResizableShape(qreal x, qreal y, qreal w, qreal h)
    : BaseShape(x, y, w, h), resizing(false)
{
    this->setFlag(QGraphicsItem::ItemIsMovable, true);
    this->setFlag(QGraphicsItem::ItemIsSelectable, true);
    this->setAcceptHoverEvents(true);
}
template <typename BaseShape>
void ResizableShape<BaseShape>::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
{
    if (isInResizeArea(event->pos()))
    {
        this->setCursor(Qt::SizeFDiagCursor);
    }
    else
    {
        this->setCursor(Qt::SizeAllCursor);
    }
    BaseShape::hoverMoveEvent(event);
}

template <typename BaseShape>
bool ResizableShape<BaseShape>::isInResizeArea(const QPointF &pos) const
{
    QRectF r = this->rect();
    QRectF resizeArea(r.bottomRight() - QPointF(20, 20), r.bottomRight());
    return resizeArea.contains(pos);
}

template <typename BaseShape>
void ResizableShape<BaseShape>::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    if (isInResizeArea(event->pos()))
    {
        resizing = true;
        this->setCursor(Qt::SizeFDiagCursor);
    }
    else
    {
        resizing = false;
        this->setCursor(Qt::SizeAllCursor);
        BaseShape::mousePressEvent(event);
    }
}

template <typename BaseShape>
void ResizableShape<BaseShape>::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    if (resizing)
    {
        QRectF newRect = this->rect();
        newRect.setBottomRight(event->pos());
        this->setRect(newRect);
    }
    else
    {
        BaseShape::mouseMoveEvent(event);
    }
}

template <typename BaseShape>
void ResizableShape<BaseShape>::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    resizing = false;
    this->setCursor(Qt::SizeAllCursor);
    BaseShape::mouseReleaseEvent(event);
}

template <typename BaseShape>//虚函数
void ResizableShape<BaseShape>::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    BaseShape::paint(painter, option, widget);
}
// ResizableRectangle 实现
ResizableRectangle::ResizableRectangle(qreal x, qreal y, qreal w, qreal h)
    : ResizableShape<QGraphicsRectItem>(x, y, w, h)
{
}

// ResizableEllipse 实现
ResizableEllipse::ResizableEllipse(qreal x, qreal y, qreal w, qreal h)
    : ResizableShape<QGraphicsEllipseItem>(x, y, w, h)
{
}

// 显式实例化模板类
template class ResizableShape<QGraphicsRectItem>;
template class ResizableShape<QGraphicsEllipseItem>;