84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
#include "baseModelItem/electricBaseModelSvgItem.h"
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#include "graphicsItem/itemControlHandle.h"
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#include <QPainter>
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#include <QStyleOption>
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#include <QSvgRenderer>
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#include <QDebug>
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ElectricBaseModelSvgItem::ElectricBaseModelSvgItem(const QRect &rect, bool autoGenPort,QGraphicsItem *parent)
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: GraphicsBaseModelItem(parent),m_pRender(nullptr)
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{
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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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}
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ElectricBaseModelSvgItem::~ElectricBaseModelSvgItem()
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{
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}
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QPainterPath ElectricBaseModelSvgItem::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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path.addRect(m_boundingRect);
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return path;
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}
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void ElectricBaseModelSvgItem::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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}
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void ElectricBaseModelSvgItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
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{
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if(m_pRender)
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{
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m_pRender->render(painter,m_boundingRect);
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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 (option->state & QStyle::State_Selected) //是选中状态,绘制选中框
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{
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renderSelectBackground(painter);
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}
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}
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void ElectricBaseModelSvgItem::loadSvg(const QString& str)
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{
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m_pRender = new QSvgRenderer(str);
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}
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void ElectricBaseModelSvgItem::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 ElectricBaseModelSvgItem::editShape(int nHandle,const QPointF& ptMouse)
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{
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prepareGeometryChange();
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updateHandles();
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}
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