qt: add QByteArray conversion for drag and drop

src/modules/interface/qt/data/ReadableItemModel.h

@@ -2,6 +2,7 @@
 
 #include <QStandardItemModel>
 #include <QMimeData>
+#include <QDebug>
 
 #include <ReadableData.h>
 
@@ -11,20 +12,16 @@ public:
 protected:
     QStringList mimeTypes() const override {return QStringList(ReadableData::mimeType());}
     QMimeData *mimeData(const QModelIndexList &indices) const override {
+        // FIXME: Pretty messy to have this here
+        qRegisterMetaTypeStreamOperators<ReadableData>("ReadableData");
+        
         if (indices.size() < 1) {
             return nullptr;
         }
-        
-        QVariantList itemDataList;
-        
-        for (QModelIndex modelIndex : indices) {
-            itemDataList.append(itemFromIndex(modelIndex)->data(Qt::UserRole));
-        }
-        
         QByteArray b_data;
         QDataStream stream(&b_data, QIODevice::WriteOnly);
         
-        stream << itemDataList;
+        stream << itemFromIndex(indices[0])->data(Qt::UserRole);
         
         QMimeData *data = new QMimeData;
         data->setData(ReadableData::mimeType(), b_data);

src/modules/interface/qt/widgets/ReadableGraphDisplay.cpp

@@ -1,16 +1,86 @@
 #include "ReadableGraphDisplay.h"
 
-ReadableGraphDisplay::ReadableGraphDisplay(QWidget *parent) : QGraphicsView(new QGraphicsScene, parent) {
-    m_chart = new QChart;
-    m_chart->createDefaultAxes();
+#include <ReadableData.h>
+#include <ReadableMasterObservable.h>
+
+#include <QDragEnterEvent>
+#include <QMimeData>
+
+ReadableGraphDisplay::ReadableGraphDisplay(QWidget *parent) : QChartView(parent) {
+    // FIXME: drops are only accepted only on a small area on the widget
+    setAcceptDrops(true);
+    setRenderHint(QPainter::Antialiasing);
     
-    scene()->addItem(m_chart);
+    m_chart = new QChart;
+    
+    setChart(m_chart);
+    
+    m_chart->addSeries(&series);
+    
+    m_chart->addAxis(&xAxis, Qt::AlignBottom);
+    m_chart->addAxis(&yAxis, Qt::AlignLeft);
+    
+    series.attachAxis(&xAxis);
+    series.attachAxis(&yAxis);
+    
+    yAxis.setRange(0, 70000);
+    xAxis.setRange(0, 20);
+    
+    x = 0;
 }
 
 bool ReadableGraphDisplay::event(QEvent *event) {
     if (event->type() == QEvent::Leave) {
-        qDebug() << "leave";
         return true;
     }
     return QAbstractScrollArea::event(event);
 }
+
+void ReadableGraphDisplay::dragEnterEvent(QDragEnterEvent *event) {
+    qDebug() << event->mimeData()->formats();
+    
+    if (event->mimeData()->hasFormat(ReadableData::mimeType())) {
+        event->accept();
+    }
+}
+
+void ReadableGraphDisplay::dropEvent(QDropEvent *event) {
+    //QVariantList itemDataList;
+    QByteArray b_data = event->mimeData()->data(ReadableData::mimeType());
+    
+    qDebug() << b_data;
+    
+    // Convert mime data to QVariantList
+    
+    QDataStream stream(&b_data, QIODevice::ReadOnly);
+    
+    QVariant v;
+    stream >> v;
+    
+    qDebug() << v;
+    
+    if (!v.canConvert<ReadableData>()) {
+        qDebug() << "can't convert";
+    }
+    
+    ReadableData d = qvariant_cast<ReadableData>(v);
+    
+    qDebug() << d.value().data.uint_value;
+    
+   /* if (itemDataList.size() < 1) {
+        return;
+    }*/
+    
+    ReadableMasterObservable *mo = new ReadableMasterObservable(&d);
+    
+    connect(mo->createObservable(std::chrono::milliseconds(2000)), &ReadableObservable::valueUpdated, [=](tc_readable_result_t res) {
+        if (!res.valid) {
+            return;
+        }
+        
+        qDebug() << res.data.uint_value << res.valid;
+        
+        x++;
+        series.append(x, res.data.uint_value);
+    });
+}

src/modules/interface/qt/widgets/ReadableGraphDisplay.h

@@ -1,17 +1,35 @@
 #pragma once
 
-#include <QGraphicsView>
+#include <QChartView>
 #include <QGraphicsItem>
 #include <QtCharts/QChart>
+#include <QLineSeries>
+#include <QCategoryAxis>
 #include <QDebug>
 
+// Graph view for updating readables. QVariantLists convertible to  ReadableData can be dropped on this widget.
+
 using namespace QtCharts;
 
-class ReadableGraphDisplay : public QGraphicsView {
+class ReadableGraphDisplay : public QChartView {
 public:
     ReadableGraphDisplay(QWidget *parent = nullptr);
 protected:
     bool event(QEvent *event);
+    
+    void resizeEvent(QResizeEvent *event) {
+        fitInView(sceneRect());
+    }
+    void dragEnterEvent(QDragEnterEvent *event) override;
+    void dropEvent(QDropEvent *event) override;
 private:
+    Q_OBJECT
+    
     QChart *m_chart;
+    
+    QValueAxis xAxis, yAxis;
+    
+    int x;
+    
+    QLineSeries series;
 };