我最近开始学习Kivy并使用它。今天我遇到了一个问题,我不确定这是Kivy中的错误还是我的误解。这是一个简化版本。
我正在开发一个GUI,它在顶部有一个文本输入用于搜索。我的Kv文件如下所示:
#:kivy 1.0
#:import kivy kivy
<SearchPanel>:
searchquery: searchquery
AnchorLayout:
orientation: 'vertical'
anchor_x: 'center'
anchor_y: 'top'
padding: 10
TextInput:
id: searchquery
text: 'What to search for'
size_hint_x: 0.98
size_hint_y: None
height: 30
on_enter: root.search()
应用程序代码如下所示:
# -*- coding: utf-8 -*-
import kivy
kivy.require('1.4.1')
from kivy.app import App
from kivy.uix.anchorlayout import AnchorLayout
class SearchPanel(AnchorLayout):
def search(self):
pass
class ExampleApp(App):
def build(self):
return SearchPanel()
if __name__ == '__main__':
ExampleApp().run()
问题在于,当我运行应用程序时,我得到了这个回溯:
Traceback (most recent call last):
File "example.py", line 24, in <module>
ExampleApp().run()
File "/home/testing/.virtualenvs/kivy2/local/lib/python2.7/site-packages/Kivy-1.4.1-py2.7-linux-x86_64.egg/kivy/app.py", line 523, in run
root = self.build()
File "example.py", line 20, in build
return SearchPanel()
File "/home/testing/.virtualenvs/kivy2/local/lib/python2.7/site-packages/Kivy-1.4.1-py2.7-linux-x86_64.egg/kivy/uix/anchorlayout.py", line 62, in __init__
super(AnchorLayout, self).__init__(**kwargs)
File "/home/testing/.virtualenvs/kivy2/local/lib/python2.7/site-packages/Kivy-1.4.1-py2.7-linux-x86_64.egg/kivy/uix/layout.py", line 60, in __init__
super(Layout, self).__init__(**kwargs)
File "/home/testing/.virtualenvs/kivy2/local/lib/python2.7/site-packages/Kivy-1.4.1-py2.7-linux-x86_64.egg/kivy/uix/widget.py", line 113, in __init__
Builder.apply(self)
File "/home/testing/.virtualenvs/kivy2/local/lib/python2.7/site-packages/Kivy-1.4.1-py2.7-linux-x86_64.egg/kivy/lang.py", line 1217, in apply
self._apply_rule(widget, rule, rule)
File "/home/testing/.virtualenvs/kivy2/local/lib/python2.7/site-packages/Kivy-1.4.1-py2.7-linux-x86_64.egg/kivy/lang.py", line 1346, in _apply_rule
crule, idmap)})
File "_event.pyx", line 184, in kivy._event.EventDispatcher.bind (/tmp/easy_install-PMy51_/Kivy-1.4.1/kivy/_event.c:2038)
KeyError: 'enter'
显然我无法将on_enter
回调插入根布局,我做错了什么?如果我使用on_enter
更改on_text
则可行。
答案 0 :(得分:5)
好的,我发现on_enter
不是TextInput
事件。
相反,您需要使用仅适用于monoline文本输入的on_text_validate
。或者,如果您愿意,可以将小部件的on_text_validate
绑定到on_enter
函数或方法。