some comments

src/applicationLogic.nim

@@ -13,6 +13,8 @@ var signalHandler: SignalCallback = proc(p0: cstring): void =
 
   tearDownForeignThreadGc()
 
+
+# Probably all QT classes will look like this:
 QtObject:
   type ApplicationLogic* = ref object of QObject
     app: QApplication
@@ -52,6 +54,8 @@ QtObject:
   proc onExitTriggered(self: ApplicationLogic) {.slot.} =
     self.app.quit
 
+
+  # Accesors
   proc callResult*(self: ApplicationLogic): string {.slot.} =
     result = self.callResult
 
@@ -64,6 +68,7 @@ QtObject:
 
   proc `callResult=`*(self: ApplicationLogic, callResult: string) = self.setCallResult(callResult)
 
+  # Binding between a QML variable and accesors is done here
   QtProperty[string] callResult:
     read = callResult
     write = setCallResult
@@ -91,3 +96,6 @@ QtObject:
     read = accountResult
     write = setAccountResult
     notify = callResultChanged
+
+  # This class has the metaObject property available which lets 
+  # access all the QProperties which are stored as QVariants

src/nim_status_client.nim

@@ -2,20 +2,31 @@ import NimQml
 import applicationLogic
 
 proc mainProc() =
+
+  # From QT docs:
+  # For any GUI application using Qt, there is precisely one QApplication object, 
+  # no matter whether the application has 0, 1, 2 or more windows at any given time. 
+  # For non-QWidget based Qt applications, use QGuiApplication instead, as it does 
+  # not depend on the QtWidgets library. Use QCoreApplication for non GUI apps
   var app = newQApplication()
-  defer: app.delete()
-
-  let logic = newApplicationLogic(app)
-  defer: logic.delete
+  defer: app.delete()       # Defer will run this just before mainProc() function ends
 
+  
   var engine = newQQmlApplicationEngine()
   defer: engine.delete()
 
+
+  let logic = newApplicationLogic(app)
+  defer: logic.delete
+  
   let logicVariant = newQVariant(logic)
   defer: logicVariant.delete
 
   engine.setRootContextProperty("logic", logicVariant)
   engine.load("main.qml")
+  
+  # Qt main event loop is entered here
+  # The termination of the loop will be performed when exit() or quit() is called
   app.exec()
 
 when isMainModule: