more messaging for user, reduce writer waiting time

grabber.cpp

@@ -18,6 +18,5 @@ void Grabber::run() {
           count += 1;
       }
       cam->StopGrabbing();
-      std::cerr << "terminated: " << count << std::endl;
     }
 }

pylonrecorder.cpp

@@ -54,6 +54,8 @@ PylonRecorder::PylonRecorder(QWidget *parent)
   connect(frameTimer, &QTimer::timeout, this, &PylonRecorder::displaySingleFrame);
   preassureTimer = new QTimer(this);
   connect(preassureTimer, &QTimer::timeout, this, &PylonRecorder::displayBufferPreassure);
+  labelTimer = new QTimer(this);
+  connect(labelTimer, &QTimer::timeout, this, &PylonRecorder::displayActivity);
 
   preassureBar = new QProgressBar(this);
   preassureBar->setRange(0, 100);
@@ -68,10 +70,23 @@ PylonRecorder::PylonRecorder(QWidget *parent)
   loadBar->setRange(0, 1000);
   QLabel *loadLabel = new QLabel("Load:", this);
 
+  writingLabel = new QLabel("writing");
+  //writingLabel->setStyleSheet("QLabel { color : gray; }");
+  writingLabel->setEnabled(false);
+  grabbingLabel = new QLabel("grabbing");
+  //grabbingLabel->setStyleSheet("QLabel { color : gray; }");
+  grabbingLabel->setEnabled(false);
+  labelSwitch = false;
+  cameraConnectedLabel = new QLabel("disconnected");
+
+  statusBar()->addWidget(new QLabel("Camera:"));
+  statusBar()->addWidget(cameraConnectedLabel);
   statusBar()->addWidget(preassureLabel);
   statusBar()->addWidget(preassureBar);
   statusBar()->addWidget(loadLabel);
   statusBar()->addWidget(loadBar);
+  statusBar()->addWidget(grabbingLabel);
+  statusBar()->addWidget(writingLabel);
 
   resize(QGuiApplication::primaryScreen()->availableSize() * 3 / 5);
 }
@@ -384,7 +399,11 @@ void PylonRecorder::adjustScrollBar(QScrollBar *scrollBar, double factor) {
 
 void PylonRecorder::connectCamera() {
   std::string message;
-  pylon->openCamera(message);
+  bool success = pylon->openCamera(message);
+  if (success) {
+    cameraConnectedLabel->setText("connected");
+    cameraConnectedLabel->setStyleSheet("QLabel { color : green; }");
+  }
   statusBar()->showMessage(QString::fromStdString(message));
   updateActions();
 }
@@ -392,6 +411,8 @@ void PylonRecorder::connectCamera() {
 void PylonRecorder::disconnectCamera() {
   pylon->closeCamera();
   statusBar()->showMessage(tr("Camera closed!"));
+  cameraConnectedLabel->setText("disconnected");
+  cameraConnectedLabel->setStyleSheet("QLabel { color : black; }");
   updateActions();
 }
 
@@ -410,29 +431,44 @@ void PylonRecorder::startRecording() {
   grabber->start();
   writer->start();
   grabbing = true;
+  writing = true;
+  stopRequest = false;
 
   preassureTimer->start(50);
   frameTimer->start(50);
+  labelTimer->start(333);
   updateActions();
 
 }
 
 void PylonRecorder::stopRecording() {
-  frameTimer->stop();
-  grabber->requestStop();
-  writer->requestStop();
+  if (!stopRequest) {
+      frameTimer->stop();
+      grabber->requestStop();
+      writer->requestStop();
+      grabbing = false;
+      stopRequest = true;
+  }
 }
 
 void PylonRecorder::writerDone() {
   preassureTimer->stop();
   preassureBar->reset();
   loadBar->reset();
+  labelTimer->stop();
+  writingLabel->setEnabled(false);
+  grabbingLabel->setEnabled(false);
   grabber->wait(10000);
   writer->wait(10000);
-  grabbing = false;
+  writing = false;
   updateActions();
 }
 
+void PylonRecorder::displayActivity() {
+  grabbingLabel->setEnabled(labelSwitch && grabbing);
+  writingLabel->setEnabled(labelSwitch && writing);
+  labelSwitch = !labelSwitch;
+}
 void PylonRecorder::displaySingleFrame() {
      MyImage img;
      bool valid = buffer->readLast(img);

pylonrecorder.h

@@ -56,6 +56,7 @@ private slots:
     void quitApplication();
     void displaySingleFrame();
     void displayBufferPreassure();
+    void displayActivity();
     void writerDone();
 
 private:
@@ -71,9 +72,8 @@ private:
     void adjustScrollBar(QScrollBar *scrollBar, double factor);
 
     QImage image;
-    QTimer *frameTimer;
-    QTimer *preassureTimer;
-    QLabel *imageLabel;
+    QTimer *frameTimer, *preassureTimer, *labelTimer;
+    QLabel *imageLabel, *writingLabel, *grabbingLabel, *cameraConnectedLabel;
     QProgressBar *preassureBar;
     QProgressBar *loadBar;
     QScrollArea *scrollArea;
@@ -82,7 +82,7 @@ private:
     ImageBuffer *buffer;
     Grabber *grabber;
     Writer *writer;
-    bool grabbing;
+    bool grabbing, stopRequest, writing, labelSwitch;
     QPalette progressPalette;
 
 #if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)

writer.cpp

@@ -28,14 +28,12 @@ void Writer::run() {
                   }
               }
           } else {
-            while (buffer->bufferLoad() < 5 && !stop_request) {
+            while (buffer->bufferLoad() < 1 && !stop_request) {
               msleep(10);
-              std::cerr << "waiting.." << buffer->bufferLoad() << std::endl;
             }
           }
         }
       videoWriter.Close();
-      std::cerr << "writer terminated: " << count << std::endl;
     } else {
       std::cerr << "Got no video specifications, not writing!" << std::endl;
     }