返回值從Fucntion到Traits GUI

Question

我正在嘗試開發一個使用Enthought的GUI。我對如何使用Traits和從函數返回一個值來顯示在GUI上有點困惑。下面我寫了一個簡單的GUI來顯示我的問題。

from traits.api import HasTraits, Instance, String, Float, Enum, Button, Str, List, Bool, Int 
    from traitsui.api import Handler, View, Item, Group, HSplit, NoButtons, VGroup, VGrid, HGroup, EnumEditor, Action, ProgressEditor, ButtonEditor 
    from multiprocessing.pool import ThreadPool 
    import simple_GUI_function 

    class Input_Panel(HasTraits): 

     Name = Str(name='Name', label="Name") 
     Iterations = Str(name='Iterations',label="Iterations") 

     #~ #Create the User Information panel 
     User_Information_Panel = View(VGroup(
              VGrid(
                Item('Name'), 
                Item('Iterations'), 
                ), 
               show_border=True, label="Information" 
              ) 
            ) 

     class Output_Panel(HasTraits): 

      counter_out = Int(0) 

      User_Output_Panel = View(VGrid(
              Item('counter_out', width=-10, style='readonly',resizable=False      
               ), 
              ) 
            ) 



      class Program_Execute_Thread(Handler): 

        wants_abort = False 

        pool = ThreadPool(processes=1) 


       def process(self, iterations): 
         try: 
          if self.processing_job.isAlive(): 
          return 
         except AttributeError: 
          pass 
         self.processing_job = Thread(target = process, args = (iterations)) 
         self.processing_job.start() 

       def run(self): 

         while not self.wants_abort: 

          print("here") 


          async_result = pool.apply_async(simple_GUI_function.Gui_func.Func_test(simple_GUI_function.Gui_func(), iterations)) 

          return_val = async_result.get() 




       class Start_Panel(HasTraits): 

        Program_Execute = Instance(Program_Execute_Thread) 


        Start_Button = Button(name = 'Start', action='_Start_Button', tooltip = 'Start')  
        Quit_Button = Button(name = 'Exit Program', action='_Quit_Button', tooltip = 'Quit') 

        Button_Panel = View(HGroup(
               Item('Start_Button', show_label = False), 
               Item('Quit_Button', show_label = False), 
              ) 
            ) 


        def _Start_Button_fired(self): 

         if self.Program_Execute and self.Program_Execute.isAlive(): 
          self.Program_Execute.wants_abort = True 
         else: 
          self.Program_Execute = Program_Execute_Thread() 
          self.Program_Execute.start() 

         print("Start Button pushed") 


       def _Quit_Button_fired(self): 

         print("Quit Button pushed") 



       class MainWindowHandler(Handler): 

        def close(self, info, is_OK): 


        #~ if (info.object.button_panel.Program_Execute_Thread and \ 
        #~ info.object.button_panel.Program_Execute_Thread.isAlive()): 
        #~ info.object.button_panel.Program_Execute_Thread.wants_abort = True 
        #~ while info.object.Program_Execute_Thread.isAlive(): 
        #~ sleep(0.1) 
        #~ GUI.process_events() 

         return True 


       class MainWindow(HasTraits): 

        user_input = Instance(Input_Panel,()) 
        user_output = Instance(Output_Panel,()) 
        button_panel = Instance(Start_Panel,()) 


        view = View(VGroup(Item('user_input', style = 'custom', show_label = False), 
             Item('user_output', style = 'custom', show_label = False), 
             Item('button_panel', style = 'custom', show_label = False), 
             show_labels = False), 
             resizable = True, handler = MainWindowHandler(), 
           ) 



       if __name__ == '__main__': 
        MainWindow().configure_traits() 

這裏是簡單的函數代碼試圖調用：

class Gui_func: 


     def Func_test(self, iteration): 

      import time 

      print("Inside the function") 

      time.sleep(2) 

      print("Now leaving the function") 

      p = iteration + 1 

      return p 

的代碼將註冊開始按鈕開始推，但繼續產生錯誤「Program_Execute_Thread」對象有沒有屬性「開始」 。我查看了使用Traits構建的Camera.py線程示例，並圍繞該示例構建了我的代碼。看起來Python似乎不會將我的Program_Execute_Thread識別爲「線程」。任何人有任何想法？

乾杯， Shivels

Answer 1

解決我自己的問題。看起來我忘了將Program_Execute_Thread聲明爲「Program_Execute_Thread（Thread）」，而且我必須啓動該線程。