我想在 Kivy 文本输入中将一行文本居中。
我将使用填充
widget.padding = [ (self.textinput.width - width of line) / 2, 20, 0, 0]
but i can't find the width of the line. How can I calculate or access the width of the line?
有一个内部TextInput._get_text_width
可用于计算适当填充的方法:
from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.lang import Builder
Builder.load_string('''
<MyWidget>:
TextInput:
multiline: False
on_text: root.update_padding(args[0])
padding_x: self.width/2 # initial padding
''')
class MyWidget(FloatLayout):
def update_padding(self, text_input, *args):
text_width = text_input._get_text_width(
text_input.text,
text_input.tab_width,
text_input._label_cached
)
text_input.padding_x = (text_input.width - text_width)/2
class MyApp(App):
def build(self):
return MyWidget()
if __name__ == '__main__':
MyApp().run()
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