Fixed camera for legacy UM3 printer again

CL-541

cura/PrinterOutput/NetworkCamera.py

@@ -59,7 +59,6 @@ class NetworkCamera(QObject):
 
     @pyqtSlot()
     def stop(self):
-
         self._stream_buffer = b""
         self._stream_buffer_start_index = -1
 

cura/PrinterOutputDevice.py

@@ -97,7 +97,6 @@ class PrinterOutputDevice(QObject, OutputDevice):
         # create the item (and fail) every time.
         if not self._monitor_component:
             self._createMonitorViewFromQML()
-
         return self._monitor_item
 
     @pyqtProperty(QObject, constant=True)

plugins/UM3NetworkPrinting/LegacyUM3OutputDevice.py

@@ -74,7 +74,6 @@ class LegacyUM3OutputDevice(NetworkedPrinterOutputDevice):
 
         self._monitor_view_qml_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "MonitorItem.qml")
 
-
         self._output_controller = LegacyUM3PrinterOutputController(self)
 
     def _onAuthenticationStateChanged(self):

plugins/UM3NetworkPrinting/MonitorItem.qml

@@ -6,37 +6,49 @@ import Cura 1.0 as Cura
 
 Component
 {
-    Image
+    Item
     {
-        id: cameraImage
-        width: Math.min(sourceSize.width === 0 ? 800 * screenScaleFactor : sourceSize.width, maximumWidth)
-        height: Math.floor((sourceSize.height === 0 ? 600 * screenScaleFactor : sourceSize.height) * width / sourceSize.width)
-        anchors.horizontalCenter: parent.horizontalCenter
-        anchors.verticalCenter: parent.verticalCenter
-        z: 1
-        onVisibleChanged:
+        width: maximumWidth
+        height: maximumHeight
+        Image
         {
-            if(visible)
+            id: cameraImage
+            width: Math.min(sourceSize.width === 0 ? 800 * screenScaleFactor : sourceSize.width, maximumWidth)
+            height: Math.floor((sourceSize.height === 0 ? 600 * screenScaleFactor : sourceSize.height) * width / sourceSize.width)
+            anchors.horizontalCenter: parent.horizontalCenter
+            anchors.verticalCenter: parent.verticalCenter
+            z: 1
+            Component.onCompleted:
             {
                 if(OutputDevice.activePrinter != null && OutputDevice.activePrinter.camera != null)
                 {
                     OutputDevice.activePrinter.camera.start()
                 }
-            } else
+            }
+            onVisibleChanged:
             {
-                if(OutputDevice.activePrinter != null && OutputDevice.activePrinter.camera != null)
+                if(visible)
                 {
-                    OutputDevice.activePrinter.camera.stop()
+                    if(OutputDevice.activePrinter != null && OutputDevice.activePrinter.camera != null)
+                    {
+                        OutputDevice.activePrinter.camera.start()
+                    }
+                } else
+                {
+                    if(OutputDevice.activePrinter != null && OutputDevice.activePrinter.camera != null)
+                    {
+                        OutputDevice.activePrinter.camera.stop()
+                    }
                 }
             }
-        }
-        source:
-        {
-            if(OutputDevice.activePrinter != null && OutputDevice.activePrinter.camera != null && OutputDevice.activePrinter.camera.latestImage)
+            source:
             {
-                return OutputDevice.activePrinter.camera.latestImage;
+                if(OutputDevice.activePrinter != null && OutputDevice.activePrinter.camera != null && OutputDevice.activePrinter.camera.latestImage)
+                {
+                    return OutputDevice.activePrinter.camera.latestImage;
+                }
+                return "";
             }
-            return "";
         }
     }
 }