Signals and slots prepared to update content, received from UDP packet

simulation/VirtualLedBoard/mainwindow.cpp

@@ -14,8 +14,12 @@ MainWindow::MainWindow(QWidget *parent)
     this->server = new UdpLedServer ();
 
     this->mOffscreenPanel = new QImage(DEFAULT_WIDTH + LED_DISTANCE, DEFAULT_HEIGHT + LED_DISTANCE, QImage::Format_RGB32);
-    this->renderPanel();
+    for(int x=0; x < (PANEL_WIDTH * MAXIMUM_PANELSIZE); x++) {
-    this->drawImage(this->mOffscreenPanel);
+        for(int y=0; y < PANEL_HEIGHT; y++) {
+            setLED(x, y);
+        }
+    }
+    updatePanel();
 }
 
 MainWindow::~MainWindow()
@@ -34,17 +38,21 @@ void MainWindow::drawImage(QImage *target) {
     this->ui->ledPanel->addWidget(graphicsView);
 }
 
-void MainWindow::renderPanel(void) {
-    this->mOffscreenPanel->fill(COLOR_BACKGROUND);
 
+void MainWindow::setLED(uint8_t x, uint8_t y) {
     /* draw inital screen */
     QPainter painter(this->mOffscreenPanel);
     painter.setRenderHint(QPainter::Antialiasing, true);
     painter.setPen(QPen(COLOR_FOREGROUND, 1));
     painter.setBrush(COLOR_FOREGROUND);
-    for(int x=0; x < (PANEL_WIDTH * MAXIMUM_PANELSIZE); x++) {
-        for(int y=0; y < PANEL_HEIGHT; y++) {
     painter.drawEllipse(LED_DIAMETER/2 + (x* LED_DISTANCE), LED_DIAMETER/2 + (y * LED_DISTANCE), LED_DIAMETER, LED_DIAMETER);
 }
+
+void MainWindow::updatePanel(void) {
+    this->drawImage(this->mOffscreenPanel);
+    this->renderPanel();
 }
+
+void MainWindow::renderPanel(void) {
+    this->mOffscreenPanel->fill(COLOR_BACKGROUND);
 }

simulation/VirtualLedBoard/mainwindow.h

@@ -22,6 +22,10 @@ public:
     MainWindow(QWidget *parent = nullptr);
     ~MainWindow();
 
+public slots:
+    void setLED(uint8_t x, uint8_t y);
+    void updatePanel(void);
+
 private:
     Ui::MainWindow *ui;
     UdpLedServer *server;

simulation/VirtualLedBoard/udpserver.cpp

@@ -2,6 +2,7 @@
 #include "settings.h"
 #include <QUdpSocket>
 #include <QNetworkDatagram>
+#include "mainwindow.h"
 
 #define UDP_IMAGE_PORT  4242
 
@@ -9,6 +10,15 @@ UdpLedServer ::UdpLedServer (QObject *parent)
     : QObject(parent)
 {
     initSocket();
+    connect(this,
+            &UdpLedServer::changeLEDstate,
+            (MainWindow*) parent,
+            &MainWindow::setLED);
+    connect(this,
+            &UdpLedServer::updatePanelContent,
+            (MainWindow*) parent,
+            &MainWindow::updatePanel);
+
 }
 
 void UdpLedServer ::initSocket()
@@ -31,6 +41,25 @@ void UdpLedServer ::readPendingDatagrams()
 
 void UdpLedServer::processTheDatagram(QNetworkDatagram datagram) {
     if (datagram.isValid() && datagram.data().length() == PACKET_LENGTH) {
-        qDebug() << "Received datagram:" << datagram.data().size();
+        uint8_t brightness = datagram.data().at(PACKET_INDEX_BRIGHTNESS);
+        int currentIndex = PACKET_INDEX_PANEL0;
+
+        uint16_t mask = 1;
+        for(int x=0; x < (PANEL_WIDTH * MAXIMUM_PANELSIZE); x++) {
+            for(int y=0; y < PANEL_HEIGHT; y++) {
+                if (datagram.data().at(currentIndex) & mask) {
+                    this->changeLEDstate(x, y);
+                }
+                mask = (mask << 1);
+                if (mask >= 256) {
+                    mask = 1;
+                    currentIndex++;
+                }
+            }
+        }
+        this->updatePanelContent();
+
+        qDebug() << "Received datagram:" << brightness;
+
     }
 }

simulation/VirtualLedBoard/udpserver.h

@@ -11,12 +11,15 @@ class UdpLedServer : public QObject
 public:
     explicit UdpLedServer (QObject *parent = nullptr);
 
-
 private:
     void initSocket();
     void readPendingDatagrams();
     QUdpSocket *mUdpSocket;
     void processTheDatagram(QNetworkDatagram datagram);
+
+signals:
+    void changeLEDstate(uint8_t x, uint8_t y);
+    void updatePanelContent(void);
 };
 
 #endif // UDPSERVER_H