Moved multiply objects to job

CURA=3239

cura/MultiplyObjectsJob.py

@@ -0,0 +1,64 @@
+# Copyright (c) 2017 Ultimaker B.V.
+# Cura is released under the terms of the AGPLv3 or higher.
+
+from UM.Job import Job
+from UM.Scene.SceneNode import SceneNode
+from UM.Math.Vector import Vector
+from UM.Operations.SetTransformOperation import SetTransformOperation
+from UM.Operations.TranslateOperation import TranslateOperation
+from UM.Operations.GroupedOperation import GroupedOperation
+from UM.Logger import Logger
+from UM.Message import Message
+from UM.i18n import i18nCatalog
+i18n_catalog = i18nCatalog("cura")
+
+from cura.ZOffsetDecorator import ZOffsetDecorator
+from cura.Arrange import Arrange
+from cura.ShapeArray import ShapeArray
+
+from typing import List
+
+from UM.Application import Application
+from UM.Scene.Selection import Selection
+from UM.Operations.AddSceneNodeOperation import AddSceneNodeOperation
+
+
+class MultiplyObjectsJob(Job):
+    def __init__(self, object_id, count, min_offset = 8):
+        super().__init__()
+        self._object_id = object_id
+        self._count = count
+        self._min_offset = min_offset
+
+    def run(self):
+        status_message = Message(i18n_catalog.i18nc("@info:status", "Multiplying and placing objects"), lifetime=0,
+                                 dismissable=False, progress=0)
+        status_message.show()
+        scene = Application.getInstance().getController().getScene()
+        node = scene.findObject(self._object_id)
+
+        if not node and self._object_id != 0:  # Workaround for tool handles overlapping the selected object
+            node = Selection.getSelectedObject(0)
+
+        # If object is part of a group, multiply group
+        current_node = node
+        while current_node.getParent() and current_node.getParent().callDecoration("isGroup"):
+            current_node = current_node.getParent()
+
+        root = scene.getRoot()
+        arranger = Arrange.create(scene_root=root)
+        offset_shape_arr, hull_shape_arr = ShapeArray.fromNode(current_node, min_offset=self._min_offset)
+        nodes = []
+
+        for i in range(self._count):
+            # We do place the nodes one by one, as we want to yield in between.
+            nodes.extend(arranger.findNodePlacements(current_node, offset_shape_arr, hull_shape_arr, count = 1))
+            Job.yieldThread()
+            status_message.setProgress((i + 1) / self._count * 100)
+
+        if nodes:
+            op = GroupedOperation()
+            for new_node in nodes:
+                op.addOperation(AddSceneNodeOperation(new_node, current_node.getParent()))
+            op.push()
+        status_message.hide()