288 lines
9.8 KiB
C++
288 lines
9.8 KiB
C++
#include "graphicsItem/graphicsItemGroup.h"
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#include "graphicsItem/handleRect.h"
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#include <QGraphicsScene>
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#include <QPainter>
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#include <QStyleOption>
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#include <QTimer>
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GraphicsItemGroup::GraphicsItemGroup(QGraphicsItem *parent)
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: AbstractShapeType<QGraphicsItemGroup>(parent)
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{
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m_type = T_group;
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m_boundingRect = QRectF();
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m_lastBoudingRect = QGraphicsItemGroup::boundingRect();
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//初始化缩放操作用的handle
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//m_vecHanle.reserve(H_left);
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for(int i = H_leftTop; i <= H_left; i++)
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{
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ItemControlHandle* pHandle = new HandleRect(this);
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pHandle->setType(T_resize);
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pHandle->setTag(i);
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m_vecHanle.insert(i-1,pHandle);
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}
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for(int i = H_rotate_leftTop; i <= H_rotate_leftBottom; i++)
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{
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ItemControlHandle* pHandle = new HandleRect(this);
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pHandle->setType(T_rotate);
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pHandle->setTag(i);
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m_vecHanle.insert(i-1,pHandle);
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}
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setFlag(QGraphicsItem::ItemIsMovable, true);
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setFlag(QGraphicsItem::ItemIsSelectable, true);
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setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
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setAcceptHoverEvents(true);
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}
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GraphicsItemGroup::~GraphicsItemGroup()
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{
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}
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QPainterPath GraphicsItemGroup::shape()
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{
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QPainterPath path;
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path.addRect(m_boundingRect);
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return path;
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}
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void GraphicsItemGroup::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
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{
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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(70,70,70), nPenWidth, Qt::DashLine)); //蓝色的外框
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painter->setBrush(Qt::NoBrush);
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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 << " boundingRect:" << m_boundingRect;
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painter->setBrush(Qt::red);
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painter->drawEllipse(QPointF(0,0), 4, 4);
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painter->setBrush(Qt::blue);
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painter->drawEllipse(originPoint, 4, 4);*/
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}
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}
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void GraphicsItemGroup::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
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{
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Q_UNUSED(event);
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}
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QVariant GraphicsItemGroup::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant& value)
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{
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if (change == QGraphicsItem::ItemSelectedHasChanged)
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{
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QGraphicsItemGroup *group = dynamic_cast<QGraphicsItemGroup *>(parentItem());
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if(!group)
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setHandleVisible(value.toBool());
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else //在某一组群中，由组群展示是否选中，自身不做展示
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{
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setSelected(false);
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return QVariant::fromValue<bool>(false);
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}
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}
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return QGraphicsItemGroup::itemChange(change, value);
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}
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void GraphicsItemGroup::syncRotationDataFromParent(const double& data)
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{
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/*m_dSyncRotationByParent += data;
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//让角度保持在正负180的区间，也就是上下两个半圈，这样易于象限判断
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if (m_dSyncRotationByParent > 180)
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m_dSyncRotationByParent -= 360;
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if (m_dSyncRotationByParent < -180)
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m_dSyncRotationByParent += 360;
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//同步给子项
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foreach (QGraphicsItem* item, childItems())
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{
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if(qgraphicsitem_cast<ItemControlHandle*>(item))
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continue;
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AbstractShape* shape = qgraphicsitem_cast<AbstractShape*>(item);
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if(shape && shape->getType()==T_group)
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{
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GraphicsItemGroup *group = qgraphicsitem_cast<GraphicsItemGroup *>(item);
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if(group)
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group->syncRotationDataFromParent(data);
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}
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else
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{
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GraphicsProjectModelItem *baseItem = qgraphicsitem_cast<GraphicsProjectModelItem*>(item);
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if (baseItem)
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baseItem->syncRotationDataFromParent(data);
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}
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}*/
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}
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void GraphicsItemGroup::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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if (m_boundingRect.isNull())
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{
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m_boundingRect = QGraphicsItemGroup::boundingRect();
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m_dWidth = m_boundingRect.width();
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m_dHeight = m_boundingRect.height();
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}
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//因为group包含子item，boundingRect会根据子item自动计算生成，所以不再通过重设boundingRect（中心和原点重合）重合的方式，因为此种方式需要子item做各种同步计算
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//最简单的方式是，每次boundingRect发生变化（缩放）后重新设置变换中心，但是会出现漂移（因为item只存储旋转角度数据，每帧都根据角度进行重绘），具体见开发学习笔记，消除这个漂移即可
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prepareGeometryChange();
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//具体计算
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double dAngle = qDegreesToRadians(rotation());
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QPointF centerPt = m_boundingRect.center();
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QPointF originPt = transformOriginPoint();
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QPointF targetPt = QPointF(0, 0);
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targetPt.setX(originPt.x() + qCos(dAngle)*(centerPt.x() - originPt.x()) - qSin(dAngle)*(centerPt.y() - originPt.y()));
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targetPt.setY(originPt.y() + qSin(dAngle)*(centerPt.x() - originPt.x()) + qCos(dAngle)*(centerPt.y() - originPt.y()));
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QPointF delta = targetPt - centerPt;
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//m_boundingRect.adjust(delta.x(), delta.y(), delta.x(), delta.y());
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setTransformOriginPoint(m_boundingRect.center());
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if(dAngle != 0)
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moveBy(delta.x(), delta.y());
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//QTimer::singleShot(2000,[&](){moveBy(-delta.x(), -delta.y());});
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updateHandles();
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}
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//调用该组内所有item(过滤handle)相关函数
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foreach (QGraphicsItem *item, childItems())
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{
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GraphicsBaseItem *baseItem = qgraphicsitem_cast<GraphicsBaseItem*>(item);
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if (baseItem && !qgraphicsitem_cast<ItemControlHandle*>(baseItem))
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{
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baseItem->updateCoordinate();
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}
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}
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m_lastBoudingRect = m_boundingRect;
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}
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void GraphicsItemGroup::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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//缩放是以图元变换原点为基准，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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//调用该组内所有item(过滤handle)相关函数
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foreach (QGraphicsItem *item, childItems())
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{
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GraphicsProjectModelItem *baseItem = qgraphicsitem_cast<GraphicsProjectModelItem*>(item);
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if (baseItem && !qgraphicsitem_cast<ItemControlHandle*>(baseItem))
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{
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baseItem->resize(nHandle, dSX, dSY, baseItem->mapFromParent(basePoint));
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}
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}
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}
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void GraphicsItemGroup::createOperationCopy()
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{
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m_pOperationCopy = new QGraphicsPathItem(this->shape());
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m_pOperationCopy->setPen(Qt::DashLine);
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m_pOperationCopy->setPos(this->pos());
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m_pOperationCopy->setTransformOriginPoint(this->transformOriginPoint());
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m_pOperationCopy->setTransform(this->transform());
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m_pOperationCopy->setRotation(this->rotation());
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m_pOperationCopy->setScale(this->scale());
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m_pOperationCopy->setZValue(this->zValue());
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QGraphicsScene* scene = this->scene();
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if(scene && m_pOperationCopy)
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{
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scene->addItem(m_pOperationCopy);
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m_movingIniPos = this->pos();
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}
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}
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void GraphicsItemGroup::removeOperationCopy()
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{
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QGraphicsScene* scene = this->scene();
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if(scene && m_pOperationCopy)
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{
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if(this->pos() != m_pOperationCopy->pos())
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this->setPos(m_pOperationCopy->pos()); //本体移动到副本的位置
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if(this->rotation() != m_pOperationCopy->rotation())
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{
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double dAngle = m_pOperationCopy->rotation();
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this->setRotation(dAngle); //本体旋转至副本的角度
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//子item的旋转数据并不会和所在组同步，需要手动同步
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foreach (QGraphicsItem* item, childItems())
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{
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if(qgraphicsitem_cast<ItemControlHandle*>(item))
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continue;
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// AbstractShape* shape = qgraphicsitem_cast<AbstractShape*>(item);
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// if(shape && shape->getType()==T_group)
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// {
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// GraphicsItemGroup *group = qgraphicsitem_cast<GraphicsItemGroup *>(item);
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// if(group)
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// group->syncRotationDataFromParent(dAngle);
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// }
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// else
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{
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GraphicsProjectModelItem *baseItem = qgraphicsitem_cast<GraphicsProjectModelItem*>(item);
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if (baseItem)
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baseItem->syncRotationDataFromParent(dAngle);
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}
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}
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}
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scene->removeItem(m_pOperationCopy);
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delete m_pOperationCopy;
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m_pOperationCopy = nullptr;
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}
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}
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void GraphicsItemGroup::moveOperationCopy(const QPointF& distance)
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{
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if(m_pOperationCopy)
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m_pOperationCopy->setPos(m_movingIniPos + distance);
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}
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void GraphicsItemGroup::rotateOperationCopy(const double& dAngle)
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{
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if(m_pOperationCopy)
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{
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m_pOperationCopy->setRotation(dAngle);
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}
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}
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void GraphicsItemGroup::addItems(const QList<QGraphicsItem*>& items)
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{
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foreach (QGraphicsItem *item, items)
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{
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item->setSelected(false);
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addToGroup(item);
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m_listItem.push_back(item);
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}
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updateCoordinate();
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}
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