better fix for load factory and New file, use the handler

space_view3d_paint_bprojection.py

@@ -9,6 +9,7 @@ bl_info = {
     "category": "Paint"}
 
 import bpy
+from bpy.app.handlers import persistent
 from bpy.types import Panel, Operator
 from bpy.props import IntProperty, FloatProperty, BoolProperty, IntVectorProperty, StringProperty, FloatVectorProperty, CollectionProperty
 from bpy_extras import view3d_utils
@@ -1223,7 +1224,6 @@ class RotateView3D(Operator):
         return{'FINISHED'}
 
     def invoke(self, context, event):
-        try:
         bpy.data.objects['Empty for BProjection']
         context.window_manager.modal_handler_add(self)
         self.first_mouse = Vector((event.mouse_region_x,event.mouse_region_y))
@@ -1233,9 +1233,6 @@ class RotateView3D(Operator):
                 self.tmp_level = sub.levels
                 sub.levels = 0
         return {'RUNNING_MODAL'}
-        except:
-            reinitkey()
-            return {'RUNNING_MODAL'}
             
 
 # Oprerator Class to pan the view3D
@@ -1284,7 +1281,6 @@ class PanView3D(bpy.types.Operator):
         return {'RUNNING_MODAL'}
                 
     def invoke(self, context, event):
-        try:
         bpy.data.objects['Empty for BProjection']    
         context.window_manager.modal_handler_add(self)
         self.first_mouse.x = event.mouse_region_x
@@ -1295,9 +1291,7 @@ class PanView3D(bpy.types.Operator):
                 sub.levels = 0  
                       
         return {'RUNNING_MODAL'}
-        except:
-            reinitkey()
-            return {'RUNNING_MODAL'}
+        
     def execute(self, context):        
         align_to_view(context)  
         
@@ -1315,7 +1309,6 @@ class ZoomView3D(Operator):
         default=1.0)
 
     def invoke(self, context, event):                   
-        try:
         ob = context.object
         em = bpy.data.objects[BProjection_Empty]
         sd = context.space_data
@@ -1352,9 +1345,6 @@ class ZoomView3D(Operator):
         align_to_view(context)
         
         return {'FINISHED'}
-        except:
-            reinitkey()
-            return {'RUNNING_MODAL'}
 
     def execute(self, context):        
         align_to_view(context)
@@ -1368,7 +1358,6 @@ class PresetView3D(Operator):
 
     view = StringProperty(name="View", description="Select the view", default='TOP')
     def invoke(self, context, event):                   
-        try:
         ob = context.object
         em = bpy.data.objects[BProjection_Empty]
         origine = ob.location
@@ -1390,13 +1379,15 @@ class PresetView3D(Operator):
         sd.region_3d.view_location =  pos_init + origine              
                     
         return {'FINISHED'}
-        except:
+
+@persistent
+def load_handler(dummy):
     reinitkey()
-            return {'RUNNING_MODAL'}
 
 def register():
     bpy.utils.register_module(__name__)
     createcustomprops(bpy.context)
+    bpy.app.handlers.load_post.append(load_handler)
 
 def unregister():
     bpy.utils.unregister_module(__name__)