kind of working

chart.cpp

@@ -56,7 +56,6 @@ bool Chart::myWheelEvent(QGraphicsSceneWheelEvent *event) {
 }
 
 void Chart::XRangeChanged(qreal min, qreal max) {
-  std::cerr << "XRangeChanged" << min <<  "\t"<< max << std::endl;
   if (series().at(0)->type() == QtCharts::QAbstractSeries::SeriesTypeLine) {
     QLineSeries *s = static_cast<QLineSeries *>(series().at(0));
     if (max > s->at(s->count()-1).x()) {

dataloader.cpp

@@ -6,12 +6,12 @@ DataLoader::DataLoader()
 
 }
 
-DataResult1D DataLoader::doLoad(const DataRequest &request) {
+DataResult1D DataLoader::doLoad(DataRequest &request) {
     std::vector<double> x, y;
     x = request.array.getDimension(1).asSampledDimension().axis(request.count[0], request.start[0]);
-    //if (request.start + request.count);
+    if (request.start + request.count > request.array.dataExtent())
+        request.count = request.array.dataExtent() - request.start;
     request.array.getData(y, request.count, request.start);
-
     DataResult1D res(request.id, request.array.id(), x, y);
     return res;
 }

dataloader.h

@@ -12,7 +12,7 @@ public:
     DataLoader();
 
 public slots:
-    DataResult1D doLoad(const DataRequest &request);
+    DataResult1D doLoad(DataRequest &request);
 };
 
 

dataqueue.cpp

@@ -19,7 +19,7 @@ void DataQueue::run() {
             DataResult1D data = loader->doLoad(requestQueue.front());
             resultMap.insert(std::pair<std::string, DataResult1D>(data.id, data));
             emit resultReady(QString::fromStdString(data.id));
-            requestQueue.pop();
+            requestQueue.pop_front();
             stop = requestQueue.size() == 0 || stopped;
         }
         mutex.unlock();
@@ -30,8 +30,13 @@ void DataQueue::requestData(const nix::DataArray &array, const nix::NDSize &coun
     requestId = nix::util::createId();
     DataRequest dr(requestId, array, count, offset);
     mutex.lock();
-    //   if (requestQueue.)
-    requestQueue.push(dr);
+    std::deque<DataRequest>::iterator it;
+    for (it = requestQueue.begin(); it < requestQueue.end(); it++) {
+        std::cerr << it->array.id() << std::endl;
+        if (it->array.id() == array.id())
+            std::cerr << "updating request" <<std::endl;
+    }
+    requestQueue.push_back(dr);
     mutex.unlock();
     start();
 }

dataqueue.h

@@ -8,6 +8,7 @@
 #include <queue>
 #include <iostream>
 #include <nix.hpp>
+#include <deque>
 
 #include "dataloader.h"
 #include "dataresult1d.h"
@@ -32,7 +33,7 @@ public slots:
 
 
 private:
-    std::queue<DataRequest> requestQueue;
+    std::deque<DataRequest> requestQueue;
     std::map<std::string, DataResult1D> resultMap;
     QMutex mutex;
     DataLoader *loader;

mainwindow.cpp

@@ -24,12 +24,14 @@ MainWindow::MainWindow(QWidget *parent) :
 
     DataLoader *loader = new DataLoader();
     loader->moveToThread(&dataQueue);
+
     dataQueue.start();
+    /*
     file = nix::File::open("/home/grewe/zwischenlager/2017-08-17-af-invivo-1/2017-08-17-af-invivo-1.nix",
                            nix::FileMode::ReadOnly);
-
-    //file = nix::File::open("/Users/jan/zwischenlager/threading_test/dataservice/data/2017-08-17-af-invivo-1.nix",
-    //nix::FileMode::ReadOnly);
+*/
+    file = nix::File::open("/Users/jan/zwischenlager/threading_test/dataservice/data/2017-08-17-af-invivo-1.nix",
+                           nix::FileMode::ReadOnly);
     nix::Block b = file.getBlock(0);
     this->voltage = b.getDataArray("V-1");
     this->eod = b.getDataArray("EOD");

multichartview.cpp

@@ -123,14 +123,19 @@ 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;
+    std::cerr << offset << count;
+
     dataQueue->requestData(arrayMap[entity_id], count, offset, request_id);
 }
 
 
 void MultiChartView::dataReady(QString requestId){
+    // need to make sure, that only one tasks does the conversion on the same buffer at the same time.
+    std::cerr << "converting data for array: " << requestId.toStdString() << std::endl;
     DataResult1D data = dataQueue->getData(requestId);
     if (data.id.empty()) {
         return;
@@ -142,6 +147,7 @@ void MultiChartView::dataReady(QString requestId){
 }
 
 void MultiChartView::dataConverted(QString entityId, double ymin, double ymax) {
+    std::cerr << "data converted for: " << entityId.toStdString() << std::endl;
     Chart *chart = chartMap[entityId.toStdString()];
     QLineSeries *series;
     bool newSeries = false;
@@ -156,6 +162,7 @@ void MultiChartView::dataConverted(QString entityId, double ymin, double ymax) {
         newSeries = true;
     } else {
         series = static_cast<QLineSeries*>(chart->series().at(0));
+        series->replace(*data_buffer[entityId.toStdString()]);
     }
 
     if (chart->axisX()->type() == QAbstractAxis::AxisTypeValue) {