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python - 禁用 TextInput 中的文本换行

转载 作者:行者123 更新时间:2023-12-01 01:05:16 24 4
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有没有办法在 TextInput 小部件中禁用文本换行?也就是说,我仍然希望有换行符,但我不想在段落内换行。所以看来 multiline=False 不是我要找的

更新:我的意思是 Windows(例如 Windows 7)Microsoft 记事本中有“自动换行”选项(格式 - 自动换行)。我想在 kivy TextInput 中禁用此选项

最佳答案

我不使用 Windows,但这对我来说听起来像是水平滚动。如果将 multiline 设置为 False,则默认情况下,TextInput 会进行水平滚动,但当 multiline 为 True 时则不会。因此,这里有一个技巧,可以将 TextInput 放入 ScrollView 中,以便在 multiline 为 True 时提供水平滚动:

from kivy.app import App
from kivy.lang import Builder
from kivy.properties import NumericProperty
from kivy.uix.scrollview import ScrollView
from kivy.uix.textinput import TextInput


class MyTextInput(TextInput):
minimum_width = NumericProperty(1)

def on_cursor(self, instance, newPos):
# determine scroll position of parent ScrollView if multiline is True
if not (isinstance(self.parent, ScrollView) and self.multiline):
return super(MyTextInput, self).on_cursor(instance, newPos)
if newPos[0] == 0:
self.parent.scroll_x = 0
else:
over_width = self.width - self.parent.width
if over_width <= 0.0:
return super(MyTextInput, self).on_cursor(instance, newPos)
view_start = over_width * self.parent.scroll_x
view_end = view_start + self.parent.width
offset = self.cursor_offset()
desired_view_start = offset - 5
desired_view_end = offset + self.padding[0] + self.padding[2] + self.cursor_width + 5
if desired_view_start < view_start:
self.parent.scroll_x = max(0, desired_view_start / over_width)
elif desired_view_end > view_end:
self.parent.scroll_x = min(1, (desired_view_end - self.parent.width) / over_width)
return super(MyTextInput, self).on_cursor(instance, newPos)

def on_text(self, instance, newText):
# calculate minimum width
width_calc = 0
for line_label in self._lines_labels:
width_calc = max(width_calc, line_label.width + 20) # add 20 to avoid automatically creating a new line
self.minimum_width = width_calc


theRoot = Builder.load_string('''
ScrollView:
id: scroller
effect_cls: 'ScrollEffect' # keeps from scrolling to far
MyTextInput:
size_hint: (None, 1)
width: max(self.minimum_width, scroller.width)
''')

class TI_in_SV(App):
def build(self):
return theRoot

TI_in_SV().run()

请注意,MyTextInput 扩展了TextInput

关于python - 禁用 TextInput 中的文本换行,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55419955/

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