python - GtkWindow 一次只能包含一个小部件

Question

我正在使用此代码从网络检索和显示图像:

class Display(object):

    def __init__(self):
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.connect('destroy', self.destroy)
        self.window.set_border_width(10)

        self.image = gtk.Image()
        response = urllib2.urlopen('http://image.url/image.jpg').read()

        pbuf = gtk.gdk.PixbufLoader()
        pbuf.write(response)
        pbuf.close()
        self.image.set_from_pixbuf(pbuf.get_pixbuf())

        self.window.add(self.image)
        self.image.show()
        self.window.show()

    def main(self):
        gtk.main()

    def destroy(self, widget, data=None):
        gtk.main_quit()

它有效，但是我现在想在图像下方显示一个文本/输入框(以便稍后检索文本)。我在 self.image.show() 下添加了以下内容:

self.entry = gtk.Entry()
self.window.add(self.entry)
self.entry.show()

但是，当我运行它时，它发出了这个警告，并且没有出现输入框:

ee.py:31: GtkWarning: Attempting to add a widget with type GtkEntry to a GtkWindow, but as a GtkBin subclass a GtkWindow can only contain one widget at a time; it already contains a widget of type GtkImage self.window.add(self.entry)

不确定为什么它不允许我放置多个小部件，有人对此有解决方案吗？

Answer 1

的确，打包就是答案。

import gtk
import urllib2
class Display(object):

    def __init__(self):
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.connect('destroy', self.destroy)
        self.window.set_border_width(10)

        # a box underneath would be added every time you do 
        # vbox.pack_start(new_widget)

        vbox = gtk.VBox()
        self.image = gtk.Image()
        response = urllib2.urlopen('http://1.bp.blogspot.com/-e-rzcjuCpk8/T3H-mSry7PI/AAAAAAAAOrc/Z3XrqSQNrSA/s1600/rubberDuck.jpg').read()

        pbuf = gtk.gdk.PixbufLoader()
        pbuf.write(response)
        pbuf.close()
        self.image.set_from_pixbuf(pbuf.get_pixbuf())

        self.window.add(vbox)
        vbox.pack_start(self.image, False)
        self.entry = gtk.Entry()
        vbox.pack_start(self.entry, False)

        self.image.show()
        self.window.show_all()

    def main(self):
        gtk.main()

    def destroy(self, widget, data=None):
        gtk.main_quit()

a=Display()
a.main()