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# for http://blender.stackexchange.com/questions/58171/how-to-create-a-boolean-vector-property-that-is-single-selection

bl_info = {
    "name": "Add-on Template",
    "description": "",
    "author": "",
    "version": (0, 0, 1),
    "blender": (2, 70, 0),
    "location": "3D View > Tools",
    "warning": "", # used for warning icon and text in addons panel
    "wiki_url": "",
    "tracker_url": "",
    "category": "Development"
}

import bpy

# ------------------------------------------------------------------------
#    store properties in the active scene
# ------------------------------------------------------------------------

class MySettings(bpy.types.PropertyGroup):

    my_bool = bpy.props.BoolProperty(
        name="Enable or Disable",
        description="A bool property",
        default = False
        )
    
    my_axis = bpy.props.EnumProperty(
        name="Axis",
        description="Description",
        items = (('POS_X', "X", ""),
                ('POS_Y', "Y", ""),
                ('POS_Z', "Z", ""),
                ),
                default='POS_X'
        )

# ------------------------------------------------------------------------
#    my tool in objectmode
# ------------------------------------------------------------------------

class OBJECT_PT_my_panel(bpy.types.Panel):
    bl_idname = "OBJECT_PT_my_panel"
    bl_label = "My Panel"
    bl_space_type = "VIEW_3D"   
    bl_region_type = "TOOLS"    
    bl_category = "Tools"
    bl_context = "objectmode"   

    @classmethod
    def poll(self,context):
        return context.object is not None

    def draw(self, context):
        layout = self.layout
        scene = context.scene
        mytool = scene.my_tool

        layout.prop(mytool, "my_bool")
        layout.row().prop(mytool, "my_axis", expand=True)

# ------------------------------------------------------------------------
# register and unregister
# ------------------------------------------------------------------------

def register():
    bpy.utils.register_module(__name__)
    bpy.types.Scene.my_tool = bpy.props.PointerProperty(type=MySettings)

def unregister():
    bpy.utils.unregister_module(__name__)
    del bpy.types.Scene.my_tool

if __name__ == "__main__":
    register()