我使用的是自定义容器,我需要在其中重新排列小部件的顺序,但是没有方法可以做到。因此,我尝试删除所有小部件并按顺序再次添加它们。
问题是,这无法正常工作,再次添加小部件后我看不到小部件,我猜发生的是,当我删除小部件时,它们变得无法实现。
有什么办法可以删除小部件,以后再使用?
pygtk docs提供了一些见识。
请注意,该容器将拥有一个引用小部件,并且这可能是最后持有的参考资料;所以从其容器中删除小部件可能会导致该小部件被破坏。如果您想再次使用小部件,则可以应该添加一个引用。
编辑
我刚刚快速修改了pygtk的Hello World,以在容器中添加/删除/重新排序窗口小部件。之所以有效,是因为button1是该类的成员变量,它永远不会超出范围。
#!/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()
只需将小部件的可见性属性设置为False,然后使用set_visible
方法将其设置为True。
不,他只需要widgrt。不需要它的对象。那么必须不要使用可见对象。它只会以图形方式隐藏。但是内存仍然不会释放
删除功能就是答案