Qt的QChart实现波的动态显示

/*************************************************************** * @Copyright(C) wangchongwei (版权申明请勿删除) * @FileName: MWaveview.h * @Author: wangchongwei * @Version: 1.0.0 * @Date: 2021.7.11 * * @Description: 波形显示的继承类 1. 加载数据波形 - 1.追加点方式 - 2.传入波形数据 2. 支持16个通道 3. 鼠标混轮可以缩小放大 4. 鼠标右键波形设置暂停开始 5. 鼠标移动显示坐标 6. 鼠标左键按住可以拖动波形 7. 设置显示关闭某个通道 8. 清楚某个通道数据 9. 设置X轴Y轴范围 10. 设置缩放比例 * 个人微信号: wang_chongwei * 个人公众号: 王崇卫(欢迎关注) * CSDN: https://blog.csdn.net/qq_38190041 * 个人网站: https://wang_chong_wei.gitee.io/blog/ * ***************************************************************/ #include "mwaveview.h" static QColor chColor[16] = { QColor (255, 228, 16), QColor (0, 225, 255), QColor (255, 20, 255), QColor (0, 23, 255), QColor (127, 255, 0), QColor (255, 0, 255), QColor (147, 112, 219), QColor (0, 255, 255), QColor (0, 0, 128), QColor (128, 0, 128), QColor (46, 139, 87), QColor (152, 251, 152), QColor (0, 255, 127), QColor (0, 0, 255), QColor (135, 206, 250), QColor (255, 192, 203), }; // 构造函数 MWaveView::MWaveView(QWidget *parent) : QChartView(parent) { this->wave_layout = new QBoxLayout(QBoxLayout::LeftToRight,parent); // set Axis------------------ this->m_wave.axisX = new QValueAxis; this->m_wave.axisY = new QValueAxis; this->m_wave.axisX->setTickCount(9); this->m_wave.axisY->setTickCount(9); this->m_wave.axisX->setLabelFormat("%d"); this->m_wave.axisY->setLabelFormat("%d"); this->m_wave.axisX->setTickType(QValueAxis::TickType::TicksFixed); this->m_wave.axisX->setRange(0, 1000); this->m_wave.axisY->setRange(-1000, 1000); // set chart----------------- this->m_wave.chart = new QChart; this->m_wave.chart->legend()->setVisible(false); //曲线文本提示 this->m_wave.chart->setTheme(QChart::ChartThemeLight); this->setChart(this->m_wave.chart); this->m_wave.chart->addAxis(this->m_wave.axisX, Qt::AlignBottom); this->m_wave.chart->addAxis(this->m_wave.axisY, Qt::AlignLeft); this->setRenderHint(QPainter::Antialiasing, true); //反走样 // 添加通道，初始化通道的线------------- for (int i = 0; i < SET_GLOBLE_CHANNEL; i++){ addChannel((WAVE_CH)i); } // 初始化部分参数----------------- m_wave.rangeX = 500; m_wave.rangeY = 500; this->m_wave.multipleX = 1.2; this->m_wave.multipleY = 1.2; this->m_event.rightButtonPressed = false; this->m_event.pauseWave = false; // menu-------------------- this->m_event.menu = new QMenu(this); this->m_event.startAction = new QAction("开始",this); this->m_event.pauseAction = new QAction("暂停",this); this->m_event.startAction->setVisible(false); this->m_event.menu->addAction(this->m_event.startAction); this->m_event.menu->addAction(this->m_event.pauseAction); // 实现自动反转action connect(m_event.startAction, &QAction::triggered, [=] { m_event.startAction->setVisible(false); m_event.pauseAction->setVisible(true);}); connect(m_event.pauseAction, &QAction::triggered, [=] { m_event.pauseAction->setVisible(false); m_event.startAction->setVisible(true);}); // 信号与槽 connect(m_event.pauseAction, &QAction::triggered, this, &MWaveView::slots_pauseGraph); connect(m_event.startAction, &QAction::triggered, this, &MWaveView::slots_startGraph); } MWaveView::~MWaveView() { } void MWaveView::addChannel(WAVE_CH ch) { SeriesType *series = new SeriesType(); QPen pen; pen.setWidth(2); // 设置线的宽度 pen.setColor(chColor[ch]); // 设置颜色 series->setPen(pen); series->setUseOpenGL(true); // 开启OPENGL // 添加进map this->m_wave.map_series.insert(ch,series); // 在chart中add series this->m_wave.chart->addSeries(this->m_wave.map_series[ch]); // 把线对应轴 this->m_wave.map_series[ch]->attachAxis(m_wave.axisX); this->m_wave.map_series[ch]->attachAxis(m_wave.axisY); } /* 调用打开通道图像 * */ void MWaveView::openChannel(WAVE_CH ch) { if (this->m_wave.map_series.contains(ch)) { this->m_wave.map_series[ch]->setVisible(true); } } /* 调用关闭通道图像 * setPointsVisible */ void MWaveView::closeChannel(WAVE_CH ch) { if (this->m_wave.map_series.contains(ch)) { this->m_wave.map_series[ch]->setVisible(false); } } void MWaveView::clearChannel(WAVE_CH ch) { if (this->m_wave.map_series.contains(ch)) { this->m_wave.map_series[ch]->clear(); } } // 设置范围 void MWaveView::setRangeX(int rangeX) { this->m_wave.rangeX = rangeX; } // 设置范围 void MWaveView::setRangeY(int rangeY) { this->m_wave.rangeY = rangeY; } void MWaveView::updateRange() { double maxX,minX; double maxY,minY; maxX = m_wave.last_point_x > m_wave.rangeX? m_wave.last_point_x:m_wave.rangeX; minX = maxX - m_wave.rangeX >0 ? maxX - m_wave.rangeX: 0; maxY = m_event.moveY + m_wave.rangeY*0.5; minY = m_event.moveY - m_wave.rangeY*0.5; this->m_wave.axisX->setRange(minX, maxX); this->m_wave.axisY->setRange(minY, maxY); } // 设置放大倍数 void MWaveView::setZoomX(double multiple) { if (multiple > 0){ this->m_wave.multipleX = multiple; } } // 设置放大倍数 void MWaveView::setZoomY(double multiple) { if (multiple > 0){ this->m_wave.multipleY = multiple; } } // 缩小 void MWaveView::ZoomOutX(void) { double zoom_out = 1.0/this->m_wave.multipleX; this->m_wave.rangeX *= zoom_out; } // 放大 void MWaveView::ZoomX(void) { this->m_wave.rangeX *= this->m_wave.multipleX; } // 缩小 void MWaveView::ZoomOutY(void) { double zoom_out = 1.0/this->m_wave.multipleY; this->m_wave.rangeY *= zoom_out; } // 放大 void MWaveView::ZoomY(void) { this->m_wave.rangeY *= this->m_wave.multipleY; } void MWaveView::startGraph(void) { this->m_event.pauseWave = false; } void MWaveView::pauseGraph(void) { this->m_event.pauseWave = true; } void MWaveView::slots_startGraph(void) { startGraph(); } void MWaveView::slots_pauseGraph(void) { pauseGraph(); } /* 追加对应通道的点的坐标 * */ void MWaveView::addSeriesData(WAVE_CH ch, const QPointF& point) { if (this->m_event.pauseWave == true) return; if (this->m_wave.map_series.contains(ch)) { this->m_wave.map_series[ch]->append(point); } } void MWaveView::addSeriesData(WAVE_CH ch, const QList<QPointF>& point_list) { static double x; if (this->m_event.pauseWave == true) return; if (this->m_wave.map_series.contains(ch)) { this->m_wave.map_series[ch]->replace(point_list); if (point_list.count()){ x = point_list[point_list.count()-1].x(); m_wave.last_point_x = x > m_wave.last_point_x? x: m_wave.last_point_x; } else{ m_wave.last_point_x = 0; } updateRange(); } } // 鼠标按下事件 void MWaveView::mousePressEvent(QMouseEvent *pEvent) { if (pEvent->button() == Qt::LeftButton) { this->m_event.leftButtonPressed = true; this->m_event.PressedPos = pEvent->pos(); this->setCursor(Qt::OpenHandCursor); } } // 鼠标松开事件 void MWaveView::mouseReleaseEven