如何增加微调器中下拉列表的宽度? [英] How do I increase the width of the dropdown list within a spinner?
问题描述
如何增加微调框内下拉列表的宽度?您在照片中看到的我的按钮很小,并且我的下拉列表中的值没有完全显示出来.我在互联网上做了一些研究,发现有些人说我需要创建一个类微调器并添加这些功能.但是我不知道该怎么做.有人可以告诉我如何执行此操作的代码示例吗?
How do I increase the width of the dropdown list within a spinner? My button as you can see in the photo is small, and the values in my drop-down list do not appear completely. I did a little research on the internet and I could see that some people say that I need to create a class spinner and add these features. But I don't know how to do this. Could someone show me a code example of how I do this?
main.kv(简化代码)
main.kv (simplified code)
...
Spinner:
id: spinnerrpi
size_hint: None, None
width: '30sp'
height: '30sp'
border: 0,0,0,0
background_normal: 'seta1.png'
background_down: 'seta2.png'
values: "Branco Neve","Banco Gelo","Amarelo","Rosa Claro","Bege"
on_text: app.spinner_rpiso(spinnerrpi.text)
...
main.py(简化代码)
main.py (simplified code)
...
class PrimeiraJanela(Screen):
pass
class GerenciadorDeJanelas(ScreenManager):
pass
class MainApp(App):
texture = ObjectProperty()
def build(self):
self.title = 'MyApp'
self.texture = Image(source = 'wave.png').texture
sm = ScreenManager()
sm.add_widget(PrimeiraJanela(name = 'primeira'))
sm.current = 'primeira'
return sm
def spinner_rpiso(self, value):
if (value=='Branco Neve'):
self.root.get_screen('primeira').ids.rpi.text = str('0.90')
self.root.get_screen('primeira').ids.spinnerrpi.text = ''
if (value=='Banco Gelo'):
self.root.get_screen('primeira').ids.rpi.text = str('0.70')
self.root.get_screen('primeira').ids.spinnerrpi.text = ''
if (value=='Amarelo'):
self.root.get_screen('primeira').ids.rpi.text = str('0.70')
self.root.get_screen('primeira').ids.spinnerrpi.text = ''
if (value=='Rosa Claro'):
self.root.get_screen('primeira').ids.rpi.text = str('0.60')
self.root.get_screen('primeira').ids.spinnerrpi.text = ''
if (value=='Bege'):
self.root.get_screen('primeira').ids.rpi.text = str('0.60')
self.root.get_screen('primeira').ids.spinnerrpi.text = ''
def exit(self):
App.get_running_app().stop()
aplicativo = MainApp()
aplicativo.run()
推荐答案
这里是 Spinner
的扩展,它继承了 option_width
属性:
Here is an extension of Spinner
that honors an option_width
property:
class SpinnerWithOptionWidth(Spinner):
option_width = NumericProperty(0) # the new property
def __init__(self, **kwargs):
self.invisible_attacher = None
super(SpinnerWithOptionWidth, self).__init__(**kwargs)
def on_is_open(self, instance, value):
# This method is modified from Spinner
attacher = self
if value:
if self.option_width > 0:
if self.invisible_attacher is None:
# The DropDown is the same width as the widget it attaches to
# so make an invisible widget with the desired width
self.invisible_attacher = Widget(opacity=0, size_hint=(None, None))
self.add_widget(self.invisible_attacher)
self.invisible_attacher.pos = (self.center_x - self.option_width/2, self.y)
self.invisible_attacher.size = (self.option_width, self.height)
attacher = self.invisible_attacher
# open th DropDown
self._dropdown.open(attacher)
else:
if self._dropdown.attach_to:
if self.invisible_attacher:
self.remove_widget(self.invisible_attacher)
self.invisible_attacher = None
self._dropdown.dismiss()
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