import bpy





class MyProperties(bpy.types.PropertyGroup):

    my_string : bpy.props.StringProperty(name= "Enter Text")

    my_float_vector : bpy.props.FloatVectorProperty(name= "Scale", soft_min= 0, soft_max= 1000, default= (1,1,1))







class ADDONNAME_PT_main_panel(bpy.types.Panel):
    bl_label = "Main Panel"
    bl_idname = "ADDONNAME_PT_main_panel"
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'UI'
    bl_category = "New Tab"

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

        layout.prop(mytool, "my_string")
        layout.prop(mytool, "my_float_vector")


        layout.operator("addonname.myop_operator")






class ADDONNAME_OT_my_op(bpy.types.Operator):
    bl_label = "Add Object"
    bl_idname = "addonname.myop_operator"



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


        return {'FINISHED'}










classes = [MyProperties, ADDONNAME_PT_main_panel, ADDONNAME_OT_my_op]



def register():
    for cls in classes:
        bpy.utils.register_class(cls)

        bpy.types.Scene.my_tool = bpy.props.PointerProperty(type= MyProperties)

def unregister():
    for cls in classes:
        bpy.utils.unregister_class(cls)
        del bpy.types.Scene.my_tool



if __name__ == "__main__":
    register()