我想提高我的 Python-Kivy 程序的可用性。在下面的程序示例中，我想让用户即使没有鼠标也可以操作它。（通过键盘输入。）（1）在第一个对话框（MyLayout2）中，用户在文本框中轻松输入，因为文本框有焦点（2）按 Enter 键盘键转到下一个对话框（MyLayout1）（3）按 Enter 键盘键转到（1）（再次MyLayout2）但是在第2（1）中，在（3）之后，Textbox的焦点丢失了。知道如何解决这个问题吗？
Main.py
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import NumericProperty
from kivy.uix.gridlayout import GridLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.textinput import TextInput
from kivy.core.window import Window
sm = ScreenManager()
class MyLayout1(BoxLayout):
pass
class MyLayout2(BoxLayout):
pass
class MyScreen(Screen):
dialog_number = 0
def __init__(self, **kwargs):
super(MyScreen, self).__init__(**kwargs)
self.gridlayout = None
self.gridlayout = MyLayout2()
self.add_widget(self.gridlayout)
Window.bind(on_key_down=self._keydown)
def _keydown(self,*args):
if (args[2] == 40):
if self.dialog_number == 0:
self.button2_clicked()
elif self.dialog_number == 1:
self.button1_clicked()
def _create_layout(self):
if self.gridlayout is not None:
self.remove_widget(self.gridlayout)
self.add_widget(self.gridlayout)
def button1_clicked(self, *args):
if self.gridlayout is not None:
self.remove_widget(self.gridlayout)
self.gridlayout = MyLayout2()
self.add_widget(self.gridlayout)
self.dialog_number = 0
def button2_clicked(self, *args):
if self.gridlayout is not None:
self.remove_widget(self.gridlayout)
self.gridlayout = MyLayout1()
self.add_widget(self.gridlayout)
self.dialog_number = 1
def find_instance(self, layout):
c = None
for c in list(self.children):
if isinstance(c, layout):
break
return c
哆啦的时光机
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