Make LenaPi usable on Android devices

- Add app icon
- prevend android device from shutting down cpu while playing music
- fix scaling bug
- fix energy saver for RasPi by reconnecting to music player
- minor refactorings and renaming

LenaPi/main.cpp

@@ -4,18 +4,20 @@
 #include <QCommandLineParser>
 #include <QFileInfo>
 #include <QDebug>
-#include <controllers/StyleController.h>
-#include "controllers/NavigationController.h"
+#include <controllers/StyleHandling.h>
+#include <controllers/NavigationController.h>
+#include <controllers/SettingsHandler.h>
 #include "MouseEventSpy.h"
 #include "EnergySaver.h"
-#include "controllers/SettingsHandler.h"
 
 int main(int argc, char *argv[])
 {
-
     QGuiApplication app(argc, argv);
     QQmlApplicationEngine engine;
 
+    /****************************************************************************
+     * Configure and parse commandline arguments
+    ****************************************************************************/
     QCommandLineParser parser;
     parser.setApplicationDescription("Lena's music app");
     // Define a custom config file using -c or --config
@@ -25,6 +27,12 @@ int main(int argc, char *argv[])
     // process commandline arguments
     parser.process(app);
 
+    /****************************************************************************
+     * Find and read settings
+     * If a config file is handed over via commandline arguments, it is preferred.
+     * Otherwise, the config in the standard location is used. If none exists yet,
+     * a default config is created.
+    ****************************************************************************/
     QSettings* settings = nullptr;
     if(!parser.value(configOption).isEmpty()){
         // config was handed over via commandline argument. Use this config if file exists.
@@ -35,23 +43,35 @@ int main(int argc, char *argv[])
         }
     }
     if(!settings){
-        // default config
+        // create config from default location
         settings = new QSettings(QSettings::Scope::UserScope, "MaleyanaSoft", "LenaPi");
     }
 
-    /* Read Settings */
+    // Read Settings
     const auto settingsHandler = SettingsHandler::createSettingsHandlerAndFillWithDefaultsIfMissing(settings);
 
 
-    // init style
-    StyleController styleController;
-    styleController.init(engine.rootContext());
-    // init main app
+    /****************************************************************************
+     * init style
+     * Sets default sizes for ui elements. The element size is scaled according
+     * to the device's display size.
+     ****************************************************************************/
+    StyleHandling styleHandler;
+    styleHandler.init(engine.rootContext());
+
+    /****************************************************************************
+     * init main app
+    ****************************************************************************/
     NavigationController navController;
     navController.setContext(engine.rootContext());
     navController.init(settingsHandler->getRootPath());
     navController.setUiProfile(settingsHandler->getProfile());
 
+    /****************************************************************************
+     * init energy saver
+     * Prevents sleep on android devices and shuts down other device if inactive
+     * (no music or mouse events) for a certain time intervall
+    ****************************************************************************/
     if(settingsHandler->isEnergySaverEnabled()){
         /* install MouseEventSpy and energy saver used for auto shut down of device
          *  if not used for a predefined time.
@@ -60,9 +80,13 @@ int main(int argc, char *argv[])
         EnergySaver::init(settingsHandler->getEnergySaverTimeout(), settingsHandler->getShutdownScript());
         QObject::connect(MouseEventSpy::instance(), &MouseEventSpy::mouseEventDetected,
                          EnergySaver::instance(), &EnergySaver::restartTimer);
+    } else {
+        EnergySaver::init();
     }
 
-    // load GUI
+    /****************************************************************************
+     * load view
+    ****************************************************************************/
     engine.load(QUrl("qrc:/main.qml"));
 
     return app.exec();