287 lines
8.9 KiB
C++
287 lines
8.9 KiB
C++
#ifndef GRAPHICSBASEITEM_H
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#define GRAPHICSBASEITEM_H
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#include "itemControlHandle.h"
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#include <QObject>
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#include <QGraphicsItem>
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#include <QGraphicsSceneMouseEvent>
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#include <QPen>
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//基类采用模板形式，QGraphicsItem是默认值,也可以是别的类型，比如QGraphicsItemGroup，这样不同的基类继承可以共用一些高层的行为定义
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template <typename BaseType = QGraphicsItem>
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class AbstractShapeType : public BaseType
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{
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public:
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explicit AbstractShapeType(QGraphicsItem *parent = 0)
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: BaseType(parent)
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{
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m_pen = QPen(Qt::NoPen);
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m_brush = QBrush(QColor(rand() % 32 * 8, rand() % 32 * 8, rand() % 32 * 8));
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m_dWidth = m_dHeight = 0;
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m_pOperationCopy = nullptr;
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}
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virtual ~AbstractShapeType()
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{
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for (size_t i = 0; i < m_vecHanle.size(); i++)
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{
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ItemControlHandle* pHandle = m_vecHanle[i];
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if (pHandle)
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{
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delete pHandle;
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pHandle = nullptr;
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}
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}
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}
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public:
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QPen pen() { return m_pen; }
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void setPen(const QPen &pen) { m_pen = pen; }
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QColor penColor() { return m_pen.color(); }
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void setPenColor(const QColor &color) { m_pen.setColor(color); }
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QBrush brush() { return m_brush; }
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void setBrush(const QBrush &brush) { m_brush = brush; }
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QColor brushColor() { return m_brush.color(); }
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void setBrushColor(const QColor &color) { m_brush.setColor(color); }
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double width() { return m_dWidth; }
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void setWidth(double width)
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{
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m_dWidth = width;
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updateCoordinate();
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}
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double height() { return m_dHeight; }
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void setHeight(double height)
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{
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m_dHeight = height;
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updateCoordinate();
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}
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int collidesWithHandle(const QPointF& point)
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{
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for(auto it = m_vecHanle.begin(); it != m_vecHanle.end(); it++)
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{
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QPointF pt = (*it)->mapFromScene(point);
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if((*it)->contains(pt))
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return (*it)->getTag();
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}
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return HandleTag::H_none;
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}
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//操作副本相关
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virtual void createOperationCopy() {}
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virtual void removeOperationCopy() {}
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virtual void moveOperationCopy(const QPointF&) {}
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virtual void rotateOperationCopy(const double&) {}
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virtual void resize(int,double, double, const QPointF&) {}
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virtual void move(const QPointF&) {}
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virtual void editShape(int, const QPointF&) {}
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virtual void updateCoordinate() {}
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//handle相关
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virtual int handleCount() { return m_vecHanle.count(); }
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virtual ItemControlHandle* getHandle(int nHandle)
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{
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ItemControlHandle* handle = nullptr;
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for(auto it = m_vecHanle.begin(); it != m_vecHanle.end(); it++)
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{
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if((*it)->getTag() == nHandle)
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{
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handle = (*it);
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return handle;
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}
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}
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return handle;
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}
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virtual void setHandleVisible(bool bVisible)
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{
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for(auto it = m_vecHanle.begin(); it != m_vecHanle.end(); it++)
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{
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if(bVisible)
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(*it)->show();
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else
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(*it)->hide();
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}
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}
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virtual QPointF getSymmetricPointPos(int nHandle) //获取对称点的坐标位置，缩放的时候需要以对称点为锚点
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{
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QPointF pt;
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//编号从1开始，因此下标需要-1
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switch (nHandle)
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{
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case H_leftTop:
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pt = m_vecHanle.at(H_rightBottom - 1)->pos();
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break;
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case H_top:
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pt = m_vecHanle.at(H_bottom - 1)->pos();
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break;
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case H_rightTop:
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pt = m_vecHanle.at(H_leftBottom - 1)->pos();
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break;
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case H_right:
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pt = m_vecHanle.at(H_left - 1)->pos();
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break;
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case H_rightBottom:
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pt = m_vecHanle.at(H_leftTop - 1)->pos();
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break;
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case H_bottom:
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pt = m_vecHanle.at(H_top - 1)->pos();
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break;
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case H_leftBottom:
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pt = m_vecHanle.at(H_rightTop - 1)->pos();
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break;
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case H_left:
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pt = m_vecHanle.at(H_right - 1)->pos();
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break;
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default:
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break;
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}
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return pt;
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}
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virtual void updateHandles()
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{
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int nMargin = 5;
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const QRectF& boundRect = this->boundingRect();
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for(auto it = m_vecHanle.begin(); it != m_vecHanle.end(); it++)
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{
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switch ((*it)->getTag()) {
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case H_leftTop:
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(*it)->move(boundRect.x() - nMargin, boundRect.y() - nMargin);
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break;
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case H_top:
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(*it)->move(boundRect.x() + boundRect.width() * 0.5, boundRect.y() - nMargin);
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break;
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case H_rightTop:
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(*it)->move(boundRect.x() + boundRect.width() + nMargin, boundRect.y() - nMargin);
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break;
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case H_right:
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(*it)->move(boundRect.x() + boundRect.width() + nMargin, boundRect.y() + boundRect.height() * 0.5 + nMargin);
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break;
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case H_rightBottom:
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(*it)->move(boundRect.x() + boundRect.width() + nMargin, boundRect.y() + boundRect.height() + nMargin);
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break;
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case H_bottom:
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(*it)->move(boundRect.x() + boundRect.width() * 0.5, boundRect.y() + boundRect.height()+ nMargin);
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break;
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case H_leftBottom:
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(*it)->move(boundRect.x() - nMargin, boundRect.y() + boundRect.height() + nMargin);
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break;
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case H_left:
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(*it)->move(boundRect.x() - nMargin, boundRect.y() + boundRect.height() * 0.5);
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break;
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case H_rotate_leftTop:
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{
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ItemControlHandle* handle = getHandle(H_leftTop);
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if(handle)
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{
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int nSize = handle->getSize();
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QPointF pt = handle->pos();
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(*it)->move(pt.x() - nSize - 1, pt.y() - nSize - 1);
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}
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else
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(*it)->setVisible(false);
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break;
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}
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case H_rotate_rightTop:
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{
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ItemControlHandle* handle = getHandle(H_rightTop);
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if(handle)
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{
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int nSize = handle->getSize();
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QPointF pt = handle->pos();
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(*it)->move(pt.x() + nSize + 1, pt.y() - nSize - 1);
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}
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else
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(*it)->setVisible(false);
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break;
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}
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case H_rotate_rightBottom:
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{
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ItemControlHandle* handle = getHandle(H_rightBottom);
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if(handle)
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{
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int nSize = handle->getSize();
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QPointF pt = handle->pos();
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(*it)->move(pt.x() + nSize + 1, pt.y() + nSize + 1);
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}
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else
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(*it)->setVisible(false);
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break;
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}
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case H_rotate_leftBottom:
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{
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ItemControlHandle* handle = getHandle(H_leftBottom);
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if(handle)
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{
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int nSize = handle->getSize();
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QPointF pt = handle->pos();
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(*it)->move(pt.x() - nSize - 1, pt.y() + nSize + 1);
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}
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else
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(*it)->setVisible(false);
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break;
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}
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default:
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break;
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}
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}
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m_boundingRect_selected = boundRect.adjusted(-nMargin, -nMargin, nMargin, nMargin);
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}
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virtual QRectF boundingRect() const { return m_boundingRect; }
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virtual QPainterPath shape()
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{
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QPainterPath path;
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return path;
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}
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protected:
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QPen m_pen;
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QBrush m_brush;
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double m_dWidth;
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double m_dHeight;
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QRectF m_boundingRect;
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QRectF m_boundingRect_selected;//选中矩形框
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QGraphicsPathItem* m_pOperationCopy; //图元移动和旋转时的操作副本
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QPointF m_movingIniPos; //移动副本开始移动初始点
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QVector<ItemControlHandle*> m_vecHanle;
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};
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typedef AbstractShapeType<QGraphicsItem> AbstractShape;
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class GraphicsBaseItem : public QObject, public AbstractShapeType<QGraphicsItem>
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{
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Q_OBJECT
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public:
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GraphicsBaseItem(QGraphicsItem *parent);
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virtual ~GraphicsBaseItem();
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virtual void createOperationCopy();
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virtual void removeOperationCopy();
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virtual void moveOperationCopy(const QPointF&);
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virtual void rotateOperationCopy(const double&);
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//多边形、线段等点选创建的对象需要的函数
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virtual void addPoint(const QPointF&) {}
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virtual bool endDrawing() { return true; }
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protected:
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virtual QVariant itemChange(QGraphicsItem::GraphicsItemChange, const QVariant&);
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virtual void contextMenuEvent(QGraphicsSceneContextMenuEvent*);
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};
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#endif
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