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WIP: Make application initialization and start up more clear

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- Create SingleInstance class to handling single instance stuff.
 - Instead of calling getInstance() everywhere, initialize each object
   explicitly in order when application starts and getInstance()s do not
   create instances any more and they merely return the created
   instances.
 - Only set initial values in construtor functions __init__(). Move the
   initialization of context-aware (i.e. things that depend on other
   things) to separate functions.
 - Split application creation and initialziation into several steps and
   them should be called explicitly in the correct order.
This commit is contained in:
Lipu Fei 2018-04-30 16:47:14 +02:00
parent c8f73d303e
commit 051dd7a6e9
14 changed files with 521 additions and 471 deletions
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cura/CuraActions.py
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@ -12,7 +12,6 @@ from UM.Scene.Selection import Selection
from UM.Scene.Iterator.BreadthFirstIterator import BreadthFirstIterator
from UM.Operations.GroupedOperation import GroupedOperation
from UM.Operations.RemoveSceneNodeOperation import RemoveSceneNodeOperation
from UM.Operations.SetTransformOperation import SetTransformOperation
from UM.Operations.TranslateOperation import TranslateOperation
from cura.Operations.SetParentOperation import SetParentOperation