Blender add-on for exposing the 3D View's rotation locking feature

lockview.py

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bl_info = {
    "name": "Lock View",
    "description": "Exposes rotation locking in the 3D View to a specific viewing angle",
    "author": "Jason van Gumster (Fweeb)",
    "version": (1, 0, 0),
    "blender": (2, 76, 0),
    "location": "3D View > Properties Region > View",
    "warning": "",
    "wiki_url": "",
    "tracker_url": "",
    "category": "3D View"}

import bpy


def lock_ui(self, context):
    layout = self.layout

    layout.prop(context.space_data.region_3d, 'lock_rotation', text='Lock View Rotation')


def register():
    bpy.types.VIEW3D_PT_view3d_properties.append(lock_ui)


def unregister():
    bpy.types.VIEW3D_PT_view3d_properties.remove(lock_ui)


if __name__ == "__main__":
    register()

Features I'd love to see:

1. Don't prevent the ability to switch between views like top/right/front (numpad 1,3,7 by default), flip the view (numpad 9 by default) or switch between ortho and persp (numpad 5 by default) while view rotation is locked.
   -> ONLY prevent view rotation through mouse input. ('view3d.rotate')
2. Add option to reuse 'Rotate View' ('view3d.rotate') hotkey for a different action while view rotation is locked.
   e.g. 'Rotate View' is bound to 'Right Mouse'. 'Right Mouse' does nothing while view rotation is locked. -> Let me bind 'Right Mouse' to 'Move View' while view rotation is locked but remain its original use while view rotation is not locked.

I just wanted to say good work.

thanks that is exactly what I needed thanks alot it a great help

Thanks you so much!

Important if people wants to import it to Blender 2.8x, the code line

"blender": (2, 76, 0),

must be updated after importing to the blender version, so

"blender": (2, 80, 0),

and the menu is on the 3D View>right panel>View>Lock View Rotation