Pygtk：從容器中移除一個小部件，稍後重用它

Question

我正在使用自定義容器，我需要重新排序小部件，但沒有方法可以執行此操作。所以我試圖刪除所有的小部件，並再次按順序添加它們。

問題是這樣做效果不好，再次添加它們後我看不到這些小部件，我猜想發生了什麼事情是，當我刪除這些小部件時，它們變得不可實現。

是否有任何方法可以刪除一個小部件並在以後重用它？

Answer 1

pygtk docs提供了一些洞察力。

注意容器將擁有 參考部件，並認爲這可能是 舉行的最後參考;因此從其容器 中刪除小部件可能會導致該小部件被銷燬。 如果您想再次使用小部件，您應該爲其添加引用。

編輯

我只是快速修改的PyGTK的世界您好添加/刪除/重新排序小部件的容器。這是可行的，因爲button1是類的成員變量，它永遠不會超出範圍。

#!/usr/bin/env python 

# example helloworld2.py 

import pygtk 
pygtk.require('2.0') 
import gtk 

class HelloWorld2: 

    # Our new improved callback. The data passed to this method 
    # is printed to stdout. 
    def callback_remove(self, widget, data): 
    self.box1.remove(self.button1); 

    def callback_add(self, widget, data): 
     self.box1.pack_start(self.button1, True, True, 0) 

    # another callback 
    def delete_event(self, widget, event, data=None): 
     gtk.main_quit() 
     return False 

    def __init__(self): 
     # Create a new window 
     self.window = gtk.Window(gtk.WINDOW_TOPLEVEL) 

     # This is a new call, which just sets the title of our 
     # new window to "Hello Buttons!" 
     self.window.set_title("Hello Buttons!") 

     # Here we just set a handler for delete_event that immediately 
     # exits GTK. 
     self.window.connect("delete_event", self.delete_event) 

     # Sets the border width of the window. 
     self.window.set_border_width(10) 

     # We create a box to pack widgets into. This is described in detail 
     # in the "packing" section. The box is not really visible, it 
     # is just used as a tool to arrange widgets. 
     self.box1 = gtk.HBox(False, 0) 

     # Put the box into the main window. 
     self.window.add(self.box1) 

     # Creates a new button with the label "Button 1". 
     self.button1 = gtk.Button("Button 1") 

     # Now when the button is clicked, we call the "callback" method 
     # with a pointer to "button 1" as its argument 
     self.button1.connect("clicked", self.callback_remove, "button 1") 

     # Instead of add(), we pack this button into the invisible 
     # box, which has been packed into the window. 
     self.box1.pack_start(self.button1, True, True, 0) 

     # Always remember this step, this tells GTK that our preparation for 
     # this button is complete, and it can now be displayed. 
     self.button1.show() 

     # Do these same steps again to create a second button 
     self.button2 = gtk.Button("Button 2") 

     # Call the same callback method with a different argument, 
     # passing a pointer to "button 2" instead. 
     self.button2.connect("clicked", self.callback_add, "button 2") 

     self.box1.pack_start(self.button2, True, True, 0) 

     # The order in which we show the buttons is not really important, but I 
     # recommend showing the window last, so it all pops up at once. 
     self.button2.show() 
     self.box1.show() 
     self.window.show() 

def main(): 
    gtk.main() 

if __name__ == "__main__": 
    hello = HelloWorld2() 
    main() 

Answer 2

就在小部件的可見性屬性設置爲False，並將其設置爲True後，隨着set_visible方法。

Answer 3

沒有他只需要widgrt.its對象不need.then可見不得used.it只會隱藏graphicaly.but memmory仍然沒有公佈

刪除功能就是答案