我正在尝试一个包含StackLayout的屏幕。此StackLayout包含几个短到长的标签。 StackLayout的全部内容也应该可以使用ScrollView滚动。我尝试了以下设置，但基本上每个标签都不合适。根据我对kivy文档的理解以及对Internet上（某些）类似问题的理解，我尝试了几种替代设置，但没有一个真正起作用。
这是该代码的最低工作版本：
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.scrollview import ScrollView
from kivy.uix.stacklayout import StackLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.core.window import Window
Window.size = (350, 600)
class RootWindow(Screen):
def __init__(self, **kwargs):
super(RootWindow, self).__init__(**kwargs)
self.searchButton = Button(text="Search",
size_hint=(1,0.8))
self.searchButton.bind(on_press=self.search)
self.add_widget(self.searchButton)
# some irrelevant code
def search(self,instance):
#here some omitted code which grabs some strings from a SQLite db and saves results in src, ingsList and steps
src = 'Lorem ipsum'
ingsList = ['Lorem', 'ipsum', 'dolor', 'sit amet']
WMan.transition.direction = 'left'
WMan.current = 'second'
# theses should be aligned at center of the screen
WMan.current_screen.title.add_widget(Label(text=src,
size_hint=(1,None)))
WMan.current_screen.ingredients.add_widget(Label(text="Ingredients:",
text_size=(self.width, None),
size_hint=(1,None),
height='30sp'))
# these should be left aligned
for i in range(0,len(ingsList)):
WMan.current_screen.ingredients.add_widget(Label(text=ingsList[i],
text_size=(self.width, None),
size_hint=(0.9,None),
height='20sp'))
# center aligned
WMan.current_screen.ingredients.add_widget(Label(text="Steps:",
text_size=(self.width, None),
size_hint=(1,None),
height='30sp'))
# this should be left aligned (or, ideally, justified)
steps = "Duis finibus risus tempor nisl scelerisque, quis facilisis augue pretium. Nullam sit amet nibh ex. Pellentesque lobortis eget ipsum a congue. Nunc luctus odio sit amet arcu interdum, id pharetra urna semper. Proin at turpis vel neque facilisis pretium ut sed massa. Phasellus elit diam, elementum at tempus non, eleifend quis libero. Integer convallis tortor eget mattis eleifend."
WMan.current_screen.ingredients.add_widget(Label(text=steps,
text_size=(self.width, None),
size_hint=(1,None),
pos_hint=(None,None),
height='10sp'
))
class SecondWindow(Screen):
def __init__(self, **kwargs):
super(SecondWindow, self).__init__(**kwargs)
self.title = StackLayout(pos_hint={"x":0.05, "top":0.9},
size_hint = (0.9,0.2))
self.add_widget(self.title)
self.ingredients = StackLayout(pos_hint={"x":0.05, "top": 0.8},
size_hint=(0.9,None),
size_hint_y=None,
orientation='lr-tb',
spacing = (0,2))
self.ingredients.bind(minimum_height = self.ingredients.setter('height'))
self.scroll = ScrollView(size_hint=(1,None),
size=(self.width, Window.height),
pos_hint={"x": 0.05, "top":0.8})
self.scroll.add_widget(self.ingredients)
self.add_widget(self.scroll)
WMan = ScreenManager()
WMan.add_widget(RootWindow(name='root'))
WMan.add_widget(SecondWindow(name='second'))
class MyApp(App):
def build(self):
return WMan
if __name__ == "__main__":
MyApp().run()
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.core.window import Window
Window.size = (350, 600)
class LeftAlignedLabel(Label):
pass
Builder.load_string('''
<LeftAlignedLabel>:
size_hint: 1, None
height: '20sp'
text_size: self.size
halign: 'left'
<SecondWindow>:
StackLayout:
id: title_stack
pos_hint: {"x":0.05, "top":0.9}
size_hint: (0.9,0.2)
Label:
id: title
size_hint: (1, None)
height: self.texture_size[0]
ScrollView:
id: scroll
size_hint: (0.9,0.7)
pos_hint: {"x": 0.05, "top":0.7}
StackLayout:
size_hint: (0.9,None)
orientation: 'lr-tb'
spacing: (0,2)
height: self.minimum_height
Label:
text: 'Ingredients:'
size_hint: (1,None)
text_size: self.size
halign: 'left'
height: '30sp'
BoxLayout:
id: ingredients
orientation: 'vertical'
size_hint: (1, None)
height: self.minimum_height
Label:
text: 'Steps:'
size_hint: (1,None)
height: '30sp'
Label:
id: steps
text_size: (self.width, None)
size_hint: (1,None)
height: self.texture_size[1] # adjusts height according to text
''')
class RootWindow(Screen):
def __init__(self, **kwargs):
super(RootWindow, self).__init__(**kwargs)
self.searchButton = Button(text="Search",
size_hint=(1,0.8))
self.searchButton.bind(on_press=self.search)
self.add_widget(self.searchButton)
# some irrelevant code
def search(self,instance):
#here some omitted code which grabs some strings from a SQLite db and saves results in src, ingsList and steps
src = 'Lorem ipsum'
ingsList = ['Lorem', 'ipsum', 'dolor', 'sit amet']
WMan.transition.direction = 'left'
WMan.current = 'second'
# theses should be aligned at center of the screen
# WMan.current_screen.title.add_widget(Label(text=src,
# size_hint=(1,None)))
WMan.current_screen.ids.title.text = src
# these should be left aligned
for i in range(0,len(ingsList)):
WMan.current_screen.ids.ingredients.add_widget(LeftAlignedLabel(text=ingsList[i]))
# this should be left aligned (or, ideally, justified)
steps = "Duis finibus risus tempor nisl scelerisque, quis facilisis augue pretium. Nullam sit amet nibh ex. Pellentesque lobortis eget ipsum a congue. Nunc luctus odio sit amet arcu interdum, id pharetra urna semper. Proin at turpis vel neque facilisis pretium ut sed massa. Phasellus elit diam, elementum at tempus non, eleifend quis libero. Integer convallis tortor eget mattis eleifend."
WMan.current_screen.ids.steps.text = steps
class SecondWindow(Screen):
pass
WMan = ScreenManager()
WMan.add_widget(RootWindow(name='root'))
WMan.add_widget(SecondWindow(name='second'))
class MyApp(App):
def build(self):
return WMan
if __name__ == "__main__":
MyApp().run()
LeftAlignedLabel类用于使成分表保持对齐。
此外，使用kv语言也使查看可疑结构变得更加容易。例如，标题Label是第一个StackLayout的唯一子级。通常，如果您不打算添加其他子项，则只有一个子项的布局可以仅由该子项代替。