140 lines
3.9 KiB
C++
140 lines
3.9 KiB
C++
#include "graphicsItem/graphicsRectItem.h"
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#include "graphicsItem/itemControlHandle.h"
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#include <QPainter>
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GraphicsRectItem::GraphicsRectItem(const QRect &rect, bool isRound, QGraphicsItem *parent)
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: GraphicsBaseItem(parent), m_bIsRound(isRound), m_dRatioX(1 / 10.0), m_dRatioY(1 / 10.0)
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{
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m_pen = QPen(Qt::black);
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m_brush = QBrush(Qt::NoBrush);
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m_lastBoudingRect = rect;
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m_boundingRect = rect;
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m_dWidth = rect.width();
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m_dHeight = rect.height();
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if (m_bIsRound) //圆角矩形添加两个圆角大小控制点
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{
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ItemControlHandle* pHandle1 = new ItemControlHandle(this);
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pHandle1->setType(T_editShape);
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pHandle1->setTag(H_edit);
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m_vecHanle.push_back(pHandle1);
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ItemControlHandle* pHandle2 = new ItemControlHandle(this);
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pHandle2->setType(T_editShape);
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pHandle2->setTag(H_edit+1);
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m_vecHanle.push_back(pHandle2);
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}
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}
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GraphicsRectItem::~GraphicsRectItem()
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{
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}
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QPainterPath GraphicsRectItem::shape()
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{
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QPainterPath path;
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double dHandleX = 0.0;
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double dHandleY = 0.0;
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if(m_dRatioX>0)
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dHandleX = m_dWidth * m_dRatioX + 0.5;
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if(m_dRatioY>0)
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dHandleY = m_dHeight * m_dRatioY + 0.5;
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if(m_bIsRound)
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path.addRoundedRect(m_boundingRect, dHandleX, dHandleY);
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else
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path.addRect(m_boundingRect);
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return path;
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}
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void GraphicsRectItem::updateHandles()
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{
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GraphicsBaseItem::updateHandles();
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if(m_bIsRound && m_vecHanle.size() == H_edit + 1)
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{
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const QRectF& boundingRect = this->boundingRect();
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//H_edit=9所以index号需要-1
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m_vecHanle[H_edit -1]->move(boundingRect.right() - boundingRect.width() * m_dRatioX, boundingRect.top());
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m_vecHanle[H_edit + 1 -1]->move(boundingRect.right(), boundingRect.top() + boundingRect.height() * m_dRatioY);
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}
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}
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void GraphicsRectItem::updateCoordinate()
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{
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QPointF pt1, pt2, delta;
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pt1 = mapToScene(transformOriginPoint());
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pt2 = mapToScene(m_boundingRect.center());
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delta = pt1 - pt2;
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if (!parentItem())
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{
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prepareGeometryChange();
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m_boundingRect = QRectF(-m_dWidth / 2, -m_dHeight / 2, m_dWidth, m_dHeight);
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setTransform(transform().translate(delta.x(), delta.y()));
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setTransformOriginPoint(m_boundingRect.center());
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moveBy(-delta.x(), -delta.y());
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setTransform(transform().translate(-delta.x(), -delta.y()));
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updateHandles();
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}
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m_lastBoudingRect = m_boundingRect;
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}
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void GraphicsRectItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
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{
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painter->setPen(m_pen);
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painter->setBrush(m_brush);
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double dHandleX = 0.0;
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double dHandleY = 0.0;
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if(m_dRatioX>0)
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dHandleX = m_dWidth * m_dRatioX + 0.5;
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if(m_dRatioY>0)
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dHandleY = m_dHeight * m_dRatioY + 0.5;
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if(m_bIsRound)
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painter->drawRoundedRect(m_boundingRect, dHandleX, dHandleY);
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else
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painter->drawRect(m_boundingRect);
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}
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void GraphicsRectItem::resize(int nHandle,double dSX, double dSY, const QPointF& basePoint)
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{
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switch (nHandle)
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{
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case H_left:
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case H_right:
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dSY = 1; //拖拽的是左点右点，为水平缩放，忽略垂直变化
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break;
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case H_top:
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case H_bottom:
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dSX = 1; //拖拽的是顶点底点，为垂直缩放，忽略水平变化
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break;
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}
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QTransform trans;
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//缩放是以图元原点（中心）位置为基准，所以每帧都先移动移动到想要的基准点，缩放之后再移回
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trans.translate(basePoint.x(), basePoint.y());
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trans.scale(dSX, dSY);
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trans.translate(-basePoint.x(), -basePoint.y());
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prepareGeometryChange();
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m_boundingRect = trans.mapRect(m_lastBoudingRect);
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m_dWidth = m_boundingRect.width();
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m_dHeight = m_boundingRect.height();
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updateHandles();
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}
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void GraphicsRectItem::move(const QPointF& point)
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{
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moveBy(point.x(), point.y());
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}
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