Merge branch '15.06'

* 15.06:
  Do not cause "dictionary changed size during iteration" errors when changing view
  Adds an idle-state for the layerview slider
  Adds an idle-state for the safebutton
  Sets the platform activity on true when a model is loaded
  Sets the platform activity on true when a model is loaded
  Create functions that get & set platform activity
  Send M104 to set the temperature to 0
  Do not store files that fail to load in recent files

cura/BuildVolume.py

@@ -33,6 +33,7 @@ class BuildVolume(SceneNode):
 
         self.setCalculateBoundingBox(False)
 
+
     def setWidth(self, width):
         self._width = width
 

cura/CuraApplication.py

@@ -74,6 +74,7 @@ class CuraApplication(QtApplication):
         self._print_information = None
         self._i18n_catalog = None
         self._previous_active_tool = None
+        self._platform_activity = False
 
         self.activeMachineChanged.connect(self._onActiveMachineChanged)
 
@@ -216,6 +217,31 @@ class CuraApplication(QtApplication):
                 self._previous_active_tool = None
 
     requestAddPrinter = pyqtSignal()
+    activityChanged = pyqtSignal()
+
+    @pyqtProperty(bool, notify = activityChanged)
+    def getPlatformActivity(self):
+        return self._platform_activity
+
+    @pyqtSlot(bool)
+    def setPlatformActivity(self, activity):
+        ##Sets the _platform_activity variable on true or false depending on whether there is a mesh on the platform
+        if activity == True:
+            self._platform_activity = activity
+        elif activity == False:
+            nodes = []
+            for node in DepthFirstIterator(self.getController().getScene().getRoot()):
+                if type(node) is not SceneNode or not node.getMeshData():
+                    continue
+                nodes.append(node)
+            i = 0
+            for node in nodes:
+                if not node.getMeshData():
+                    continue
+                i += 1
+            if i <= 1: ## i == 0 when the meshes are removed using the deleteAll function; i == 1 when the last remaining mesh is removed using the deleteObject function
+                self._platform_activity = activity
+        self.activityChanged.emit()
 
     ##  Remove an object from the scene
     @pyqtSlot("quint64")
@@ -228,6 +254,7 @@ class CuraApplication(QtApplication):
         if object:
             op = RemoveSceneNodeOperation(object)
             op.push()
+            self.setPlatformActivity(False)
     
     ##  Create a number of copies of existing object.
     @pyqtSlot("quint64", int)
@@ -268,7 +295,6 @@ class CuraApplication(QtApplication):
             if type(node) is not SceneNode or not node.getMeshData():
                 continue
             nodes.append(node)
-
         if nodes:
             op = GroupedOperation()
 
@@ -276,6 +302,7 @@ class CuraApplication(QtApplication):
                 op.addOperation(RemoveSceneNodeOperation(node))
 
             op.push()
+        self.setPlatformActivity(False)
     
     ## Reset all translation on nodes with mesh data. 
     @pyqtSlot()
@@ -523,7 +550,7 @@ class CuraApplication(QtApplication):
             op.push()
 
     def _onJobFinished(self, job):
-        if type(job) is not ReadMeshJob:
+        if type(job) is not ReadMeshJob or not job.getResult():
             return
 
         f = QUrl.fromLocalFile(job.getFileName())

plugins/CuraEngineBackend/ProcessSlicedObjectListJob.py

@@ -22,15 +22,15 @@ class ProcessSlicedObjectListJob(Job):
         super().__init__()
         self._message = message
         self._scene = Application.getInstance().getController().getScene()
-
         self._progress = None
-        Application.getInstance().getController().activeViewChanged.connect(self._onActiveViewChanged)
 
     def run(self):
         if Application.getInstance().getController().getActiveView().getPluginId() == "LayerView":
             self._progress = Message(catalog.i18nc("Layers View mode", "Layers"), 0, False, 0)
             self._progress.show()
 
+        Application.getInstance().getController().activeViewChanged.connect(self._onActiveViewChanged)
+
         objectIdMap = {}
         new_node = SceneNode()
         ## Put all nodes in a dict identified by ID

plugins/USBPrinting/PrinterConnection.py

@@ -469,7 +469,7 @@ class PrinterConnection(SignalEmitter):
         
         # Turn of temperatures
         self._sendCommand("M140 S0")
-        self._sendCommand("M109 S0")
+        self._sendCommand("M104 S0")
         self._is_printing = False
 
     ##  Check if the process did not encounter an error yet.

resources/qml/Cura.qml

@@ -41,7 +41,10 @@ UM.MainWindow {
                             var path = modelData.toString()
                             return (index + 1) + ". " + path.slice(path.lastIndexOf("/") + 1);
                         }
-                        onTriggered: UM.MeshFileHandler.readLocalFile(modelData);
+                        onTriggered: {
+                            UM.MeshFileHandler.readLocalFile(modelData);
+                            Printer.setPlatformActivity(true)
+                        }
                     }
                     onObjectAdded: fileMenu.insertItem(index, object)
                     onObjectRemoved: fileMenu.removeItem(object)
@@ -318,7 +321,11 @@ UM.MainWindow {
         redo.onTriggered: UM.OperationStack.redo();
         redo.enabled: UM.OperationStack.canRedo;
 
-        deleteSelection.onTriggered: UM.Controller.removeSelection();
+        deleteSelection.onTriggered: {
+            if(objectContextMenu.objectId != 0) {
+                Printer.deleteObject(objectContextMenu.objectId);
+            }
+        }
 
         deleteObject.onTriggered: {
             if(objectContextMenu.objectId != 0) {
@@ -408,6 +415,7 @@ UM.MainWindow {
         onAccepted:
         {
             UM.MeshFileHandler.readLocalFile(fileUrl)
+            Printer.setPlatformActivity(true)
         }
     }
 

resources/qml/SaveButton.qml

@@ -14,6 +14,7 @@ Rectangle {
     property Action saveAction;
 
     property real progress: UM.Backend.progress;
+    property bool activity: Printer.getPlatformActivity;
     Behavior on progress { NumberAnimation { duration: 250; } }
 
     property string currentDevice: "local_file"
@@ -76,7 +77,7 @@ Rectangle {
                 color: UM.Theme.colors.save_button_estimated_text;
                 font: UM.Theme.fonts.small;
                 text:
-                    if(base.progress < 0) {
+                    if(base.activity == false) {
                         //: Save button label
                         return qsTr("Please load a 3D model");
                     } else if (base.progress < 0.99) {
@@ -97,7 +98,7 @@ Rectangle {
                 anchors.leftMargin: UM.Theme.sizes.save_button_text_margin.width;
                 color: UM.Theme.colors.save_button_printtime_text;
                 font: UM.Theme.fonts.small;
-                visible: base.progress < 0.99 ? false : true
+                visible: base.activity == false || base.progress < 0.99 ? false : true
                 text: (!base.printDuration || !base.printDuration.valid) ? "" : base.printDuration.getDisplayString(UM.DurationFormat.Long);
             }
             Label {
@@ -107,11 +108,10 @@ Rectangle {
                 anchors.leftMargin: UM.Theme.sizes.save_button_text_margin.width;
                 color: base.printDuration.days > 0 ? UM.Theme.colors.save_button_estimated_text : UM.Theme.colors.save_button_printtime_text;
                 font: UM.Theme.fonts.small;
-
                 property bool mediumLengthDuration: base.printDuration.hours > 9 && base.printMaterialAmount > 9.99 && base.printDuration.days == 0
                 width: mediumLengthDuration ? 50 : undefined
                 elide: mediumLengthDuration ? Text.ElideRight : Text.ElideNone
-                visible: base.progress < 0.99 ? false : true
+                visible: base.activity == false || base.progress < 0.99 ? false : true
                 //: Print material amount save button label
                 text: base.printMaterialAmount < 0 ? "" : qsTr("%1m material").arg(base.printMaterialAmount);
             }
@@ -125,7 +125,7 @@ Rectangle {
             }
             width: Math.max(infoBox.width * base.progress);
             color: UM.Theme.colors.save_button_active
-            visible: base.progress > 0.99 ? false : true
+            visible: progress > 0.99 ? false : true
         }
 
         Button {
@@ -135,7 +135,7 @@ Rectangle {
             anchors.left: parent.left
             anchors.leftMargin: UM.Theme.sizes.default_margin.width;
             tooltip: ''
-            enabled: progress >= 0.99;
+            enabled: progress > 0.99 && base.activity == true
 
             width: infoBox.width/6*4.5
             height: UM.Theme.sizes.save_button_save_to_button.height

resources/themes/cura/styles.qml

@@ -389,7 +389,7 @@ QtObject {
                 }
                 Label {
                     id: maxValueLabel
-                    visible: UM.LayerView.getLayerActivity ? true : false
+                    visible: UM.LayerView.getLayerActivity && Printer.getPlatformActivity ? true : false
                     text: control.maximumValue + 1
                     font: control.maximumValue > 998 ? UM.Theme.fonts.small : UM.Theme.fonts.default
                     transformOrigin: Item.BottomLeft
@@ -399,7 +399,7 @@ QtObject {
                 }
                 Label {
                     id: minValueLabel
-                    visible: UM.LayerView.getLayerActivity ? true : false
+                    visible: UM.LayerView.getLayerActivity && Printer.getPlatformActivity ? true : false
                     text: '1'
                     font: control.maximumValue > 998 ? UM.Theme.fonts.small : UM.Theme.fonts.default
                     transformOrigin: Item.BottomLeft
@@ -416,7 +416,7 @@ QtObject {
                 Behavior on color { ColorAnimation { duration: 50; } }
                 Label {
                     id: valueLabel
-                    visible: UM.LayerView.getLayerActivity ? true : false
+                    visible: UM.LayerView.getLayerActivity && Printer.getPlatformActivity ? true : false
                     text: control.value + 1
                     anchors.bottom: layerSliderControl.bottom
                     anchors.right: layerSliderControl.left