396 lines
10 KiB
C++
396 lines
10 KiB
C++
#include "mygraphicsview.h"
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MyGraphicsView::MyGraphicsView(QWidget *parent, double gridUnit) : QGraphicsView(parent)
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{
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m_scene = new MyGraphicsScene();
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m_scene->setSceneRect(0,0,SCENESIZE,SCENESIZE);//1016像素，1像素代表1毫米
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this->setScene(m_scene);
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setMouseTracking(true); // 跟踪鼠标位置
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m_scene->addGrid(gridUnit,m_scene->sceneRect());
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connect(m_scene, SIGNAL(siCurrentIndex(int)), this, SIGNAL(siCurrentIndex(int)));
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}
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MyGraphicsView::~MyGraphicsView()
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{
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if(m_scene != NULL)
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{
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delete m_scene;
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m_scene = NULL;
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}
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}
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void MyGraphicsView::restoreView()
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{
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//还原缩放，恢复默认大小
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this->resetTransform();
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// 计算场景的中心点
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// 获取场景中的矩形范围
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QRectF sceneRect = m_scene->sceneRect();
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// 计算场景的中心点
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QPointF centerPoint = sceneRect.center();
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// 获取当前视图的大小
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int viewWidth = this->width();
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int viewHeight = this->height();
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// 计算滚动条应该移动的距离
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// 目标是让场景的中心点与视图的中心点对齐
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int hValue = centerPoint.x() - viewWidth / 2;
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int vValue = centerPoint.y() - viewHeight / 2;
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// 设置滚动条的位置
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this->horizontalScrollBar()->setValue(hValue);
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this->verticalScrollBar()->setValue(vValue);
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m_scene->cleanScene();
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}
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void MyGraphicsView::resizeEvent(QResizeEvent *event)
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{
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if(event == NULL){}//为了去掉警告
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}
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void MyGraphicsView::mouseDoubleClickEvent(QMouseEvent *event)
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{
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qreal scaleFactor = this->matrix().m11();
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if(scaleFactor >= 200){return;}
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if(event->buttons() & Qt::LeftButton &&
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event->type() == QEvent::MouseButtonDblClick)
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{
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setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
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scale(2.0, 2.0);
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}
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}
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void MyGraphicsView::mousePressEvent(QMouseEvent *event)
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{
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if(event->buttons() & Qt::LeftButton)
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{
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m_leftPressPoint = event->pos();
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}
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QGraphicsView::mousePressEvent(event);
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}
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//恢复原状
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void MyGraphicsView::mouseReleaseEvent(QMouseEvent *event)
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{
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QGraphicsView::mouseReleaseEvent(event);
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}
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void MyGraphicsView::mouseMoveEvent(QMouseEvent *event)
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{
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if(event->buttons() & Qt::LeftButton)
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{
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bool bl = m_scene->getCurSelectState();
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//当scene选中某点时，不拖拽scene位置
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if(bl == true)
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{
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return QGraphicsView::mouseMoveEvent(event);
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}
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m_leftReleasePoint = event->pos();
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// 计算鼠标移动的距离
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int deltaX = m_leftReleasePoint.x() - m_leftPressPoint.x();
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int deltaY = m_leftReleasePoint.y() - m_leftPressPoint.y();
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// 更新滚动条的位置
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horizontalScrollBar()->setValue(horizontalScrollBar()->value() - deltaX);
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verticalScrollBar()->setValue(verticalScrollBar()->value() - deltaY);
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// 更新起始点，以便下次移动时使用
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m_leftPressPoint = m_leftReleasePoint;
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}
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return QGraphicsView::mouseMoveEvent(event);
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}
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void MyGraphicsView::wheelEvent(QWheelEvent *event)
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{
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// 获取当前鼠标相对于view的位置;
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QPointF cursorPoint = event->pos();
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// 获取当前鼠标相对于scene的位置;
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QPointF scenePos = this->mapToScene(QPoint(cursorPoint.x(), cursorPoint.y()));
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// 获取view的宽高;
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qreal viewWidth = this->viewport()->width();
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qreal viewHeight = this->viewport()->height();
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// 获取当前鼠标位置相当于view大小的横纵比例;
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qreal hScale = cursorPoint.x() / viewWidth;
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qreal vScale = cursorPoint.y() / viewHeight;
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int wheelDeltaValue = event->delta();
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// 向上滚动，放大;
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if (wheelDeltaValue > 0)
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{
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this->scale(1.2, 1.2);
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}
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// 向下滚动，缩小;
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else
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{
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this->scale(1.0 / 1.2, 1.0 / 1.2);
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}
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// 将scene坐标转换为放大缩小后的坐标;
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QPointF viewPoint = this->matrix().map(scenePos);
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// 通过滚动条控制view放大缩小后的展示scene的位置;
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horizontalScrollBar()->setValue(int(viewPoint.x() - viewWidth * hScale));
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verticalScrollBar()->setValue(int(viewPoint.y() - viewHeight * vScale));
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}
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void MyGraphicsView::showEvent(QShowEvent *event)
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{
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horizontalScrollBar()->setValue(0);
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verticalScrollBar()->setValue(0);
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QGraphicsView::showEvent(event);
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}
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void MyGraphicsView::creatViewByData(QByteArray ary)
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{
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//还原缩放，恢复默认大小
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this->resetTransform();
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// 计算场景的中心点
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// 获取场景中的矩形范围
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QRectF sceneRect = m_scene->sceneRect();
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// 计算场景的中心点
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QPointF centerPoint = sceneRect.center();
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// 获取当前视图的大小
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int viewWidth = this->width();
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int viewHeight = this->height();
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// 计算滚动条应该移动的距离
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// 目标是让场景的中心点与视图的中心点对齐
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int hValue = centerPoint.x() - viewWidth / 2;
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int vValue = centerPoint.y() - viewHeight / 2;
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// 设置滚动条的位置
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this->horizontalScrollBar()->setValue(hValue);
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this->verticalScrollBar()->setValue(vValue);
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m_scene->cleanScene();
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m_scene->addItemToScene(ary);
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}
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void MyGraphicsView::creatViewByList(QList<drawItem> list)
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{
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restoreView();
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m_scene->addItemListToScene(list);
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}
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void MyGraphicsView::enlargeView()
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{
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if(m_scene == NULL)
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{
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return;
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}
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QPointF cursorPoint;
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QPointF scenePos;
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bool bl = m_scene->getCurSelectState();
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if(bl == false)
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{
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// 缩放视图
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scale(1.2, 1.2);
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return;
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}
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else
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{
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cursorPoint = m_leftPressPoint;
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scenePos = this->mapToScene(QPoint(cursorPoint.x(), cursorPoint.y()));
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// 获取view的宽高;
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qreal viewWidth = this->viewport()->width();
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qreal viewHeight = this->viewport()->height();
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// 获取当前鼠标位置相当于view大小的横纵比例;
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qreal hScale = cursorPoint.x() / viewWidth;
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qreal vScale = cursorPoint.y() / viewHeight;
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this->scale(1.2, 1.2);
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// 将scene坐标转换为放大缩小后的坐标;
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QPointF viewPoint = this->matrix().map(scenePos);
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// 通过滚动条控制view放大缩小后的展示scene的位置;
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horizontalScrollBar()->setValue(int(viewPoint.x() - viewWidth * hScale));
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verticalScrollBar()->setValue(int(viewPoint.y() - viewHeight * vScale));
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}
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}
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void MyGraphicsView::narrowView()
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{
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if(m_scene == NULL)
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{
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return;
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}
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QPointF cursorPoint;
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QPointF scenePos;
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bool bl = m_scene->getCurSelectState();
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if(bl == false)
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{
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// 缩放视图
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this->scale(1.0 / 1.2, 1.0 / 1.2);
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return;
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}
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else
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{
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cursorPoint = m_leftPressPoint;
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scenePos = this->mapToScene(QPoint(cursorPoint.x(), cursorPoint.y()));
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// 获取view的宽高;
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qreal viewWidth = this->viewport()->width();
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qreal viewHeight = this->viewport()->height();
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// 获取当前鼠标位置相当于view大小的横纵比例;
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qreal hScale = cursorPoint.x() / viewWidth;
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qreal vScale = cursorPoint.y() / viewHeight;
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this->scale(1.0 / 1.2, 1.0 / 1.2);
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// 将scene坐标转换为放大缩小后的坐标;
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QPointF viewPoint = this->matrix().map(scenePos);
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// 通过滚动条控制view放大缩小后的展示scene的位置;
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horizontalScrollBar()->setValue(int(viewPoint.x() - viewWidth * hScale));
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verticalScrollBar()->setValue(int(viewPoint.y() - viewHeight * vScale));
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}
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}
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void MyGraphicsView::forwardAndBackward(int idx)
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{
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if(m_scene == NULL)
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{
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return;
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}
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bool bl = m_scene->initAPoint();
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if(bl == false)
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{
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return;
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}
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m_scene->forwardAndBackward(idx);
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}
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int MyGraphicsView::getItemNums()
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{
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return m_scene->items().size();
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}
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void MyGraphicsView::moveScene(int x,int y)
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{
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// 更新滚动条的位置
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horizontalScrollBar()->setValue(horizontalScrollBar()->value() - x);
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verticalScrollBar()->setValue(verticalScrollBar()->value() - y);
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}
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void MyGraphicsView::autoView()
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{
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//还原缩放，恢复默认大小
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this->resetTransform();
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// 计算场景的中心点
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// 获取场景中的矩形范围
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QRectF sceneRect = m_scene->sceneRect();
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// 计算场景的中心点
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QPointF centerPoint = sceneRect.center();
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// 获取当前视图的大小
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int viewWidth = this->width();
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int viewHeight = this->height();
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// 计算滚动条应该移动的距离
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// 目标是让场景的中心点与视图的中心点对齐
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int hValue = centerPoint.x() - viewWidth / 2;
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int vValue = centerPoint.y() - viewHeight / 2;
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// 设置滚动条的位置
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this->horizontalScrollBar()->setValue(hValue);
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this->verticalScrollBar()->setValue(vValue);
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}
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void MyGraphicsView::insertPoint(int dir)
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{
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if(m_scene == NULL)
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{
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return;
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}
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bool bl = m_scene->getCurSelectState();
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if(bl == false)
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{
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return;
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}
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m_scene->insertPoint(dir);
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}
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void MyGraphicsView::removeSelectPoint()
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{
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if(m_scene == NULL)
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{
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return;
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}
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bool bl = m_scene->getCurSelectState();
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if(bl == false)
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{
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return;
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}
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else
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{
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m_scene->removeSelectPoint();
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}
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}
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void MyGraphicsView::setShapeType(int type)
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{
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m_scene->setShapeType(type);
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}
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QList<QGraphicsEllipseItem *> MyGraphicsView::getPointList()
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{
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return m_scene->getPointList();
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}
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void MyGraphicsView::cleanView()
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{
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m_scene->cleanScene();
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}
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void MyGraphicsView::setAdsorption(bool adsorption)
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{
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m_scene->setAdsorption(adsorption);
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}
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void MyGraphicsView::setMaxSegmentLength(int value)
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{
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m_scene->setMaxSegmentLength(value);
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}
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int MyGraphicsView::getMaxSegmentLength()
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{
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return m_scene->getMaxSegmentLength();
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}
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void MyGraphicsView::setXYMove(double valX,double valY)
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{
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m_scene->setXYMove(valX,valY);
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}
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//撤销最后一个图元
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void MyGraphicsView::revokeLastItem()
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{
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m_scene->revokeLastItem();
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}
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QList<GLineItem> MyGraphicsView::getLineItemList()
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{
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return m_scene->getLineItemList();
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}
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QList<GPathItem> MyGraphicsView::getPathItemList()
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{
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return m_scene->getPathItemList();
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}
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