small fixes to QuadItem

groundStation/gui/MicroCART/mainwindow.cpp

@@ -23,11 +23,12 @@ MainWindow::MainWindow(QWidget *parent) :
     nextSpTimer(new QTimer(this)),
     sp_x(0.0f),
     sp_y(0.0f),
-    sp_z(0.0f),
-    topScene(new QGraphicsScene(this)),
-    quad(new QuadItem)
+    sp_z(0.0f)
 {
     ui->setupUi(this);
+
+    QGraphicsScene *topScene = new QGraphicsScene(this);
+    QuadItem * quad = new QuadItem(this);
     ui->topView->setScene(topScene);
 
     topScene->addItem(quad);
@@ -50,7 +51,7 @@ MainWindow::MainWindow(QWidget *parent) :
             this, SLOT (updateTracker(float, float, float, float, float, float)));
 
     connect(trackerWorker, SIGNAL (finished(float, float, float, float, float, float)),
-            this, SLOT (updateQuad(float, float, float, float, float, float)));
+            this, SLOT (quad->updateQuad(float, float, float, float, float, float)));
 
     /* Create another worker for the control graph */
     QThread * cwThread = new QThread(this);

groundStation/gui/MicroCART/mainwindow.h

@@ -81,9 +81,6 @@ private:
     float sp_x;
     float sp_y;
     float sp_z;
-
-    QGraphicsScene * topScene;
-    QuadItem * quad;
 };
 
 #endif // MAINWINDOW_H

groundStation/gui/MicroCART/quaditem.cpp

@@ -2,8 +2,9 @@
 #include <QPixmap>
 #include <QLabel>
 
-QuadItem::QuadItem()
+QuadItem::QuadItem(QGraphicsItem* parent = nullptr)
 {
+   this->setParentItem(parent);
    setFlag(ItemIsMovable);
 }