绑定Enter Button to Button（PyGObject）

Question

我正在为教育目的编写一个非常简单的GUI程序。该窗口有一个Gtk.Entry区域，我从中抓取输入并用作函数num_check（）的参数，该函数检查数字是奇数还是偶数（如果输入无效，则输出错误）。

该按钮工作正常，但我希望能够使用输入键而不是鼠标。按Enter后，焦点应该返回到输入框（Gtk.Entry）

以下是代码。我感谢任何帮助。

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

class EntryWindow(Gtk.Window): 

    def __init__(self): 
     Gtk.Window.__init__(self, title="ODD OR EVEN") 
     self.set_size_request(200, 100) 

     self.timeout_id = None 

     vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6) 
     self.add(vbox) 

     self.entry = Gtk.Entry() 
     self.entry.get_text() 
     vbox.pack_start(self.entry, True, True, 0) 

     button = Gtk.Button.new_with_label("Go") 
     button.connect("clicked", self.on_click_me_clicked) 
     vbox.pack_start(button, True, True, 0) 

     self.label = Gtk.Label() 
     self.label.get_text() 
     vbox.pack_start(self.label, True, True, 0) 

# after pressing "Go", grab text from entry and run num_check() with it, then set label with the result 
    def on_click_me_clicked(self, button): 
     number = self.entry.get_text() 
     func = odd_even.num_check(number) 
     print(func) 

     self.label.set_text(func) 


win = EntryWindow() 
win.connect("delete-event", Gtk.main_quit) 
win.show_all() 
Gtk.main() 

Answer 1

试试这个代码：

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

class EntryWindow(Gtk.Window): 

    def __init__(self): 
     Gtk.Window.__init__(self, title="ODD OR EVEN") 
     self.set_size_request(200, 100) 

     self.timeout_id = None 

     vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6) 
     self.add(vbox) 

     self.entry = Gtk.Entry() 
     self.entry.get_text() 
     self.entry.connect("activate", self.on_entry_activate) 
     vbox.pack_start(self.entry, True, True, 0) 

     button = Gtk.Button.new_with_label("Go") 
     button.connect("clicked", self.on_click_me_clicked) 
     vbox.pack_start(button, True, True, 0) 

     self.label = Gtk.Label() 
     self.label.get_text() 
     vbox.pack_start(self.label, True, True, 0) 

    def on_entry_activate (self, entry): 
     number = entry.get_text() 
     func = odd_even.num_check(number) 
     print(func) 

     self.label.set_text(func) 

# after pressing "Go", grab text from entry and run num_check() with it, then set label with the result 
    def on_click_me_clicked(self, button): 
     number = self.entry.get_text() 
     func = odd_even.num_check(number) 
     print(func) 

     self.label.set_text(func) 


win = EntryWindow() 
win.connect("delete-event", Gtk.main_quit) 
win.show_all() 
Gtk.main() 

编辑：为信号的文档是here。