T466: Only one gcode file can be loaded at a time, and deleting previous gcode file when loading non-gcode file

Merge changes : Only call backgroundItem.hasMesh if/on an imported model (skips if only curaprofiles get loaded)

cura/CuraApplication.py

@@ -19,6 +19,9 @@ from UM.SaveFile import SaveFile
 from UM.Scene.Selection import Selection
 from UM.Scene.GroupDecorator import GroupDecorator
 from UM.Settings.Validator import Validator
+from types import MethodType
+
+from UM.Qt.Bindings.MeshFileHandlerProxy import MeshFileHandlerProxy
 
 from UM.Operations.AddSceneNodeOperation import AddSceneNodeOperation
 from UM.Operations.RemoveSceneNodeOperation import RemoveSceneNodeOperation
@@ -535,6 +538,54 @@ class CuraApplication(QtApplication):
 
             qmlRegisterType(QUrl.fromLocalFile(path), "Cura", 1, 0, type_name)
 
+    loadingFiles = []
+
+    @pyqtSlot(QUrl)
+    def loadFile(self, file):
+        scene = self.getController().getScene()
+
+        def findAny():
+            for node1 in DepthFirstIterator(scene.getRoot()):
+                if hasattr(node1, "gcode") and getattr(node1, "gcode") is True:
+                    return True
+            return False
+        if findAny():
+            self.deleteAll()
+
+        if not file.isValid():
+            return
+
+        supported_extensions = [".gcode", ".g"]
+
+        f = file.toLocalFile()
+
+        if len(self.loadingFiles) > 0:
+            extension = os.path.splitext(f)[1]
+            if extension.lower() in supported_extensions:
+                return
+            extension = os.path.splitext(self.loadingFiles[0])[1]
+            if extension.lower() in supported_extensions:
+                return
+
+        self.loadingFiles.append(f)
+
+        job = ReadMeshJob(f)
+        job.finished.connect(self._readMeshFinished)
+        job.start()
+
+    def _readMeshFinished(self, job):
+        node = job.getResult()
+        if node != None:
+            filename = job.getFileName()
+            node.setSelectable(True)
+            node.setName(filename)
+            self.loadingFiles.remove(filename)
+
+            op = AddSceneNodeOperation(node, self.getController().getScene().getRoot())
+            op.push()
+
+            self.getController().getScene().sceneChanged.emit(node)
+
     def onSelectionChanged(self):
         if Selection.hasSelection():
             if self.getController().getActiveTool():

plugins/GCODEReader/GCODEReader.py

@@ -14,11 +14,13 @@ from UM.Math.AxisAlignedBox import AxisAlignedBox
 from UM.Application import Application
 from UM.Preferences import Preferences
 
+
 from cura import LayerDataBuilder
 from cura import LayerDataDecorator
 from cura import LayerPolygon
 
 import numpy
+from types import MethodType
 
 
 from UM.Job import Job

resources/qml/Cura.qml

@@ -269,16 +269,16 @@ UM.MainWindow
                     if(drop.urls.length > 0)
                     {
                         // Import models
+                        var imported_model = -1;
                         for(var i in drop.urls)
                         {
                             // There is no endsWith in this version of JS...
                             if ((drop.urls[i].length <= 12) || (drop.urls[i].substring(drop.urls[i].length-12) !== ".curaprofile")) {
                                 // Drop an object
-                                UM.MeshFileHandler.readLocalFile(drop.urls[i]);
+                                Printer.loadFile(drop.urls[i]);
-                                if (i == drop.urls.length - 1)
+                                if (imported_model == -1)
                                 {
-                                    var meshName = backgroundItem.getMeshName(drop.urls[i].toString());
+                                    imported_model = i;
-                                    backgroundItem.hasMesh(decodeURIComponent(meshName));
                                 }
                             }
                         }
@@ -297,6 +297,11 @@ UM.MainWindow
                             }
                             messageDialog.open()
                         }
+                        if (imported_model != -1)
+                        {
+                            var meshName = backgroundItem.getMeshName(drop.urls[imported_model].toString())
+                            backgroundItem.hasMesh(decodeURIComponent(meshName))
+                        }
                     }
                 }
             }
@@ -732,16 +737,13 @@ UM.MainWindow
 
             for(var i in fileUrls)
             {
-                UM.MeshFileHandler.readLocalFile(fileUrls[i])
+                Printer.loadFile(fileUrls[i])
+            }
 
-                if (i == fileUrls.length - 1)
+            var meshName = backgroundItem.getMeshName(fileUrls[0].toString())
-                {
-                    var meshName = backgroundItem.getMeshName(fileUrls.toString())
             backgroundItem.hasMesh(decodeURIComponent(meshName))
         }
     }
-        }
-    }
 
     Connections
     {

resources/qml/Menus/RecentFilesMenu.qml

@@ -26,7 +26,7 @@ Menu
                 return (index + 1) + ". " + path.slice(path.lastIndexOf("/") + 1);
             }
             onTriggered: {
-                UM.MeshFileHandler.readLocalFile(modelData);
+                Printer.loadFile(modelData);
                 var meshName = backgroundItem.getMeshName(modelData.toString())
                 backgroundItem.hasMesh(decodeURIComponent(meshName))
             }