buffer for converted data

converttoseries.cpp

@@ -12,21 +12,30 @@ void ConvertToSeries::run() {
     double max = data.ydata[0];
     if (dataPresent) {
         for (size_t i = 0; i < data.xdata.size(); ++i) {
-            this->series->append(data.xdata[i], data.ydata[i]);
+            this->buffer->push_back({data.xdata[i], data.ydata[i]});
             if (data.ydata[i] < min)
                 min = data.ydata[i];
             if (data.ydata[i] > max)
                 max = data.ydata[i];
         }
-        emit dataConverted(series, QString::fromStdString(data.entityId), min, max);
+        emit dataConverted(QString::fromStdString(data.entityId), min, max);
     }
     mutex.unlock();
 }
 
-void ConvertToSeries::setData(QLineSeries *series, const DataResult1D &data) {
+/*void ConvertToSeries::setData(QLineSeries *series, const DataResult1D &data) {
     mutex.lock();
     this->series = series;
     this->data = data;
     this->dataPresent = true;
     mutex.unlock();
 }
+*/
+
+void ConvertToSeries::setData(QVector<QPointF> *buffer, const DataResult1D &data) {
+    mutex.lock();
+    this->buffer = buffer;
+    this->data = data;
+    this->dataPresent = true;
+    mutex.unlock();
+}

converttoseries.h

@@ -19,14 +19,15 @@ private:
     bool dataPresent = false;
     DataResult1D data;
     QLineSeries *series;
-
+    QVector<QPointF> *buffer;
     void run() override;
 
 public:
     void setData(QLineSeries *series, const DataResult1D &data);
+    void setData(QVector<QPointF> *buffer, const DataResult1D &data);
 
 signals:
-    void dataConverted(QLineSeries *series, QString entityId, double, double);
+    void dataConverted(QString entityId, double, double);
 
 };
 

multichartview.cpp

@@ -28,6 +28,10 @@ MultiChartView::~MultiChartView()
     for (vit = viewMap.begin(); vit != viewMap.end(); vit++) {
         delete vit->second;
     }
+    std::map<std::string, QVector<QPointF>*>::iterator ait;
+    for (ait = data_buffer.begin(); ait != data_buffer.end(); ait++) {
+        delete ait->second;
+    }
     delete ui;
 }
 
@@ -39,6 +43,8 @@ void MultiChartView::addArray(const nix::DataArray &array) {
     this->arrayMap.insert(std::pair<std::string, nix::DataArray>(array.id(), array));
     ArrayInfo ai(array);
     this->infoMap.insert(std::pair<std::string, ArrayInfo*>(ai.arrayid, &ai));
+    QVector<QPointF> *buffer = new QVector<QPointF>();
+    this->data_buffer.insert(std::pair<std::string, QVector<QPointF>*>(ai.arrayid, buffer));
     Chart* chart = createChart(ai);
     ChartView *view = createChartView(chart, ai);
 
@@ -63,6 +69,7 @@ Chart* MultiChartView::createChart(const ArrayInfo &info) {
     chart->setToolTip(QString::fromStdString(info.name));
     chart->legend()->hide();
     chart->createDefaultAxes();
+    chart->entityId = info.arrayid;
 
     QValueAxis *axisY = new QValueAxis;
     axisY->setTickCount(10);
@@ -81,9 +88,9 @@ Chart* MultiChartView::createChart(const ArrayInfo &info) {
     axisX->setLabelsFont(tickLabelFont);
     axisX->applyNiceNumbers();
     chart->setAxisX(axisX);
-    
-    connect(axisX, SIGNAL(rangeChanged(qreal,qreal)), chart, SLOT(XRangeChanged(qreal,qreal)));
 
+    connect(axisX, SIGNAL(rangeChanged(qreal,qreal)), chart, SLOT(XRangeChanged(qreal,qreal)));
+    connect(chart, SIGNAL(newDataRequest(std::string,qreal)), this, SLOT(newDataRequest(std::string, qreal)));
     this->chartMap.insert(std::pair<std::string, Chart*>(info.arrayid, chart));
     return chart;
 }
@@ -113,36 +120,55 @@ void MultiChartView::loadData(const ArrayInfo &info) {
     }
 }
 
+
+void MultiChartView::newDataRequest(const std::string &entity_id, qreal max) {
+    std::cerr << "request new data from: "<< entity_id << " with max: "<< max << std::endl;
+    nix::NDSize offset(1, data_buffer[entity_id]->size());
+    nix::NDSize count(1, 100000);
+    std::string request_id;
+    dataQueue->requestData(arrayMap[entity_id], count, offset, request_id);
+}
+
+
 void MultiChartView::dataReady(QString requestId){
     DataResult1D data = dataQueue->getData(requestId);
     if (data.id.empty()) {
         return;
     }
     ConvertToSeries *task = new ConvertToSeries();
-    QLineSeries *series = new QLineSeries();
-    task->setData(series, data);
-    connect(task, SIGNAL(dataConverted(QLineSeries*,QString, double, double)), this, SLOT(dataConverted(QLineSeries*,QString, double, double)));
+    task->setData(data_buffer[data.entityId], data);
+    connect(task, SIGNAL(dataConverted(QString, double, double)), this, SLOT(dataConverted(QString, double, double)));
     QThreadPool::globalInstance()->start(task);
 }
 
-void MultiChartView::dataConverted(QLineSeries *series, QString entityId, double ymin, double ymax) {
-  Chart *chart = chartMap[entityId.toStdString()];
-    series->setUseOpenGL(true);
-    chart->addSeries(series);
+void MultiChartView::dataConverted(QString entityId, double ymin, double ymax) {
+    Chart *chart = chartMap[entityId.toStdString()];
+    QLineSeries *series;
+    bool newSeries = false;
+    if (chart->series().size() == 0) {
+        series = new QLineSeries();
+        series->replace(*data_buffer[entityId.toStdString()]);
+        series->setUseOpenGL(true);
+        chart->addSeries(series);
+        QPen pen = series->pen();
+        pen.setWidth(1);
+        series->setPen(pen);
+        newSeries = true;
+    } else {
+        series = static_cast<QLineSeries*>(chart->series().at(0));
+    }
 
     if (chart->axisX()->type() == QAbstractAxis::AxisTypeValue) {
         QValueAxis *axisX = static_cast<QValueAxis*>(chart->axisX());
         axisX->setRange(series->at(0).x(), series->at(series->count()-1).x());
-        series->attachAxis(axisX);
+        if (newSeries)
+            series->attachAxis(axisX);
     }
     if (chart->axisY()->type() == QAbstractAxis::AxisTypeValue) {
         QValueAxis *axisY = static_cast<QValueAxis*>(chart->axisY());
         double range = ymax - ymin;
         axisY->setRange(ymin - 0.2 * range, ymax + 0.2 * range);
-        series->attachAxis(axisY);
+        if (newSeries)
+            series->attachAxis(axisY);
     }
-
-    QPen pen = series->pen();
-    pen.setWidth(1);
-    series->setPen(pen);
 }

multichartview.h

@@ -113,6 +113,7 @@ private:
     std::map<std::string, Chart*> chartMap;
     std::map<std::string, ChartView*> viewMap;
     std::map<std::string, ArrayInfo*> infoMap;
+    std::map<std::string, QVector<QPointF>*> data_buffer;
     QFont labelFont, tickLabelFont;
 
     Chart* createChart(const ArrayInfo &info);
@@ -120,8 +121,8 @@ private:
 
 public slots:
     void dataReady(QString requestId);
-    void dataConverted(QLineSeries *series, QString entityId, double ymin, double ymax);
-
+    void dataConverted(QString entityId, double ymin, double ymax);
+    void newDataRequest(const std::string &entity_id, qreal max);
 };
 
 #endif // MULTICHARTVIEW_H