Python Gtk3 条目设置占位符文本

Question

我尝试为 Gtk.Entry 设置灰色斜体占位符文本，但该条目为空。使用Linux Mint 17.3/Gtk版本3.10.8

这有什么问题:

#!/usr/bin/env python

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

window = Gtk.Window()
box = Gtk.Box()
window.add(box)

entry = Gtk.Entry()
box.add(entry)

entry.set_placeholder_text("Filter")

window.show_all()
Gtk.main()

Answer 1

来自文档:

Note that since the placeholder text gets removed when the entry received focus, using this feature is a bit problematic if the entry is given the initial focus in a window. Sometimes this can be worked around by delaying the initial focus setting until the first key event arrives.

尝试添加一个按钮并为其提供焦点，它应该可以工作。