[Settings] add new menu, store and restore settings from previous session

pylonrecorder.cpp

@@ -17,7 +17,6 @@
 #include <QStandardPaths>
 #include <QStatusBar>
 #include <QToolBar>
-#include <QSettings>
 #include <iostream>
 #include <chrono>
 #include <cmath>
@@ -109,8 +108,10 @@ PylonRecorder::PylonRecorder(QWidget *parent)
   statusBar()->addWidget(fileHeader);
   statusBar()->addWidget(fileLabel);
   resize(QGuiApplication::primaryScreen()->availableSize() * 3 / 5);
+  applySettings();
 }
 
+
 PylonRecorder::~PylonRecorder(){
   if (grabber->isRunning()) {
       grabber->requestStop();
@@ -120,10 +121,38 @@ PylonRecorder::~PylonRecorder(){
       writer->forceStop();
       writer->wait(1000);
   }
+  storeSettings();
+  
   delete pylon;
   delete buffer;
   delete grabber;
   delete writer;
+  delete settings;
+}
+
+
+void PylonRecorder::applySettings() {
+  int bufferSize = settings->value("recorder/buffersize", defaultBufferSize).toInt();
+  int exposureTime = settings->value("camera/exposure", defaultExposureTime).toInt();
+  int frameRate = settings->value("camera/framerate", defaultFrameRate).toInt();
+  int gain = settings->value("camera/gain", defaultGain).toInt();
+  storageLocation = settings->value("recorder/storagelocation", "").toString();
+  if (!storageLocation.isEmpty()) {
+    selectStorageAction->setStatusTip(tr("Default storage location: ") + storageLocation);
+  }
+  buffersizeSpinner->setValue(bufferSize);
+  exposureSpinner->setValue(exposureTime);
+  gainSpinner->setValue(gain);
+  framerateSpinner->setValue(frameRate);
+}
+
+
+void PylonRecorder::storeSettings() {
+  settings->setValue("camera/exposure", exposureSpinner->value());
+  settings->setValue("camera/framerate", framerateSpinner->value());
+  settings->setValue("camera/gain", gainSpinner->value());
+  settings->setValue("recorder/buffersize", buffersizeSpinner->value());
+  settings->setValue("recorder/storagelocation", storageLocation);
 }
 
 
@@ -384,8 +413,19 @@ void PylonRecorder::createActions() {
   grab_stop_action = camera_menu->addAction(stop_icon, tr("&stop grabbing"), this, &PylonRecorder::stopRecording);
   grab_stop_action->setShortcut(tr("Ctrl+Shift+Enter"));
 
+  selectStorageAction = new QAction(tr("storage location"), this);
+  selectStorageAction->setStatusTip(tr("Select a storage location for the recorded videos"));
+  selectStorageAction->setToolTip(tr("Select a storage location for the recorded videos"));
+  connect(selectStorageAction, &QAction::triggered, this, &PylonRecorder::selectStorageLocation);
+  
+  storeSettingsAction = new QAction(tr("store settings"), this);
+  storeSettingsAction->setStatusTip(tr("store current settings as defaults"));
+  connect(storeSettingsAction, &QAction::triggered, this, &PylonRecorder::storeSettings);
+
   QMenu *settingsMenu = menuBar()->addMenu(tr("&Settings"));
-  settingsMenu->addAction(tr("Storage location"), this, &PylonRecorder::selectStorageLocation);
+  settingsMenu->addAction(selectStorageAction);
+  settingsMenu->addAction(storeSettingsAction);
+  settingsMenu->setToolTipsVisible(true);
 
   QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
   helpMenu->addAction(tr("&About"), this, &PylonRecorder::about);
@@ -674,5 +714,13 @@ void PylonRecorder::grabStillFromPylon() {
 }
 
 void PylonRecorder::selectStorageLocation() {
-    std::cerr << "Select folder!!! " << std::endl;
+    QString dir = QFileDialog::getExistingDirectory(this, tr("Open Directory"),
+                                                   "/home",
+                                                   QFileDialog::ShowDirsOnly
+                                                  | QFileDialog::DontResolveSymlinks);
+                                                
+    if (!dir.isEmpty()) {
+      this->storageLocation = dir;
+      selectStorageAction->setStatusTip(tr("Storage location: ") + storageLocation);
+    }    
 }

pylonrecorder.h

@@ -5,6 +5,7 @@
 #include <QTimer>
 #include <QSpinBox>
 #include <QCheckBox>
+#include <QSettings>
 
 #include "pylonwrapper.h"
 #include "imagebuffer.h"
@@ -66,6 +67,8 @@ private slots:
 private:
     void createActions();
     void updateActions();
+    void applySettings();
+    void storeSettings();
     QColor progressColor(int value);
     std::string createFilename();
 
@@ -76,6 +79,7 @@ private:
     void adjustScrollBar(QScrollBar *scrollBar, double factor);
 
     int defaultBufferSize = 3000, defaultFrameRate = 30, movieCount = 0, defaultExposureTime = 6000, defaultGain=13;
+    QSettings *settings = new QSettings;
     QImage image;
     QTimer *frameTimer, *preassureTimer, *labelTimer;
     QLabel *imageLabel, *writingLabel, *grabbingLabel, *cameraConnectedLabel, *fileLabel;
@@ -94,7 +98,8 @@ private:
     QString activeLabelStyleLow = "QLabel { font-size: 10px;font-family: Arial; color : cmyk(0, 255, 255, 0, 50); }";
     QString inactiveLabelStyle = ("QLabel { font-size: 10px;font-family: Arial; color :gray; }");
     QSpinBox *framerateSpinner, *buffersizeSpinner, *exposureSpinner, *gainSpinner;
-
+    QAction *selectStorageAction, *storeSettingsAction;
+    QString storageLocation = "";
 
 #if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
     QPrinter printer;