231 lines
7.2 KiB
C++
231 lines
7.2 KiB
C++
#include "graphicsItem/graphicsRectItem.h"
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//#include "graphicsItem/itemControlHandle.h"
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#include "graphicsItem/handleRect.h"
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#include <QPainter>
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#include <QStyleOption>
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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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//横轴X控制点
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ItemControlHandle* pHandle1 = new HandleRect(this);
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pHandle1->setType(T_editShape);
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pHandle1->setTag(H_edit);
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m_vecHanle.insert(H_edit,pHandle1);
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//纵轴Y控制点
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ItemControlHandle* pHandle2 = new HandleRect(this);
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pHandle2->setType(T_editShape);
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pHandle2->setTag(H_edit+1);
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m_vecHanle.insert(H_edit+1,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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if(m_vecHanle.contains(H_edit -1))
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{
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m_vecHanle[H_edit -1]->move(boundingRect.right() - boundingRect.width() * m_dRatioX, boundingRect.top());
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}
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if(m_vecHanle.contains(H_edit + 1 -1))
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{
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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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}
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void GraphicsRectItem::updateCoordinate() //当执行了resie和editShape函数后，boundingRect发生了变换，需要将item的原点(以中心点为原点)校准至boundingRect.center()
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{
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if (!parentItem())
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{
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QPointF pt1, pt2, delta;
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pt1 = mapToScene(QPointF(0, 0));
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pt2 = mapToScene(m_boundingRect.center());
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delta = pt1 - pt2;
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prepareGeometryChange();
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//将boundingRect设置成中心点和原点（也是默认变换原点），这样三点重合，有助于简化计算
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m_boundingRect = QRectF(-m_dWidth / 2, -m_dHeight / 2, m_dWidth, m_dHeight);
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//setTransformOriginPoint(m_boundingRect.center()); //变换中心默认为item的(0,0)点，所以不执行这句话也没有问题
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//更新bouondingRect后重回会显示位置会有变化，需要做对应的移动
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moveBy(-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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//qDebug() << "itemPos:" << mapToParent(pos());
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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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if(m_bIsRound)
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{
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double dRadiusX = 0.0;
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double dRadiusY = 0.0;
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if(m_dRatioX>0)
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dRadiusX = m_dWidth * m_dRatioX + 0.5;
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if(m_dRatioY>0)
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dRadiusY = m_dHeight * m_dRatioY + 0.5;
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painter->drawRoundedRect(m_boundingRect, dRadiusX, dRadiusY);
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}
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else
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painter->drawRect(m_boundingRect);
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if (option->state & QStyle::State_Selected) //是选中状态,绘制选中框
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{
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int nPenWidth = 1;
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painter->setPen(QPen(QColor(135,206,235,180))); //蓝色的外框
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painter->setBrush(QBrush(QColor(135,206,235,180)));
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/*double dx = m_boundingRect_selected.x();
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double dy = m_boundingRect_selected.y();
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double dWidth = m_boundingRect_selected.width();
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double dHeight = m_boundingRect_selected.height();
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//画弧线0度是3点钟方向
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if(dWidth > dHeight)
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{
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painter->drawRect(m_boundingRect_selected);
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painter->drawChord(dx-dHeight*0.5,dy,dHeight,dHeight,90*16,180*16);
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painter->drawChord(dx+dWidth-dHeight*0.5,dy,dHeight,dHeight,(-90)*16,180*16);
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}
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else if(dWidth < dHeight)
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{
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painter->drawRect(m_boundingRect_selected);
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painter->drawChord(dx,dy-dWidth*0.5,dWidth,dWidth,0*16,180*16);
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painter->drawChord(dx,dy+dHeight-dWidth*0.5,dWidth,dWidth,180*16,180*16);
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//painter->drawChord(dx+dWidth-dHeight*0.5,dy,dHeight,dHeight,(-90)*16,180*16);
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}
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else
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{
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painter->drawEllipse(QPointF(dx+dWidth*0.5,dy+dHeight*0.5),dHeight*0.5,dHeight*0.5);
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}*/
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painter->drawRect(m_boundingRect_selected);
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//绘制变换原点
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QPointF originPoint = transformOriginPoint();
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//qDebug() << "originPoint:" << originPoint;
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painter->setBrush(Qt::red);
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painter->drawEllipse(originPoint, 4, 4);
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}
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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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default:
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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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void GraphicsRectItem::editShape(int nHandle,const QPointF& ptMouse)
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{
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QPointF ptOnItem = mapFromParent(ptMouse);
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switch (nHandle)
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{
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//横轴X控制点
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case H_edit:
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{
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double dMouseX = ptOnItem.x();
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if(dMouseX < m_boundingRect.center().x())
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dMouseX = m_boundingRect.center().x();
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else if(dMouseX > m_boundingRect.right())
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dMouseX = m_boundingRect.right();
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double dWidth = m_boundingRect.width();
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if(dWidth == 0.0)
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dWidth = 1.0;
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m_dRatioX = (m_boundingRect.right() - dMouseX) / dWidth;
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}
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break;
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//纵轴Y控制点
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case H_edit + 1:
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{
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double dMouseY = ptOnItem.y();
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if(dMouseY > m_boundingRect.center().y())
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dMouseY = m_boundingRect.center().y();
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else if(dMouseY < m_boundingRect.top())
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dMouseY = m_boundingRect.top();
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double dHeight = m_boundingRect.height();
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if(dHeight == 0.0)
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dHeight = 1.0;
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m_dRatioY = (dMouseY - m_boundingRect.top()) / dHeight;
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}
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break;
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default:
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break;
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}
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prepareGeometryChange();
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updateHandles();
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}
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