Question

我有这个代码。如果我将Accordion项目的数量增加超过一定数量，该应用程序就会变得混乱。 gridLayout版本（已注释掉）按预期工作。违规地区介于HERE和THERE之间。

from kivy.app import App
from kivy.uix.spinner import Spinner, SpinnerOption
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.accordion import Accordion, AccordionItem
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.scrollview import ScrollView
from kivy.uix.gridlayout import GridLayout
from kivy.core.window import Window

class MusicController(App):

    def build(self):
        b = BoxLayout(orientation='vertical')
        top = Spinner(text = '12', values = ["Songs","Artist","Playlist","Search"], background_color = (.3,.2,.5,1), size_hint_y = 0.1)

    #< HERE >#

        items = Accordion(orientation='vertical')
        for x in xrange(30):
            item = AccordionItem(title='Title %d' % x)
            buttons = BoxLayout()
            buttons.add_widget(Button(text='Play'))
            buttons.add_widget(Button(text='Pause'))
            buttons.add_widget(Button(text='Pause'))
            item.add_widget(buttons)
            items.add_widget(item)

        #~ items = GridLayout(cols=1, spacing=10, size_hint_y=None)
        #~ items.bind(minimum_height=items.setter('height'))
        #~ for i in range(30):
            #~ btn = Button(text=str(i), 

    #< THERE >#

        sv = ScrollView(do_scroll_x = False)
        sv.add_widget(items)
        now_playing = BoxLayout(size_hint_y = 0.1)
        for widget in ["Prev","Play","Pause","Next","NP"]:
            now_playing.add_widget(Button(text=widget))

        b.add_widget(top)
        b.add_widget(sv)
        b.add_widget(now_playing)
        return b

if __name__ == '__main__':
    MusicController().run()

Answer 1

由于您控制台上的错误建议

[WARNING] [Accordion   ] not enough space for displaying all children
[WARNING] [Accordion   ] need XXXX, got XXXXpx
[WARNING] [Accordion   ] layout aborted.

只需增加给予手风琴的空间，以便它可以容纳所有孩子

将代码的第19行更改为

items = Accordion(orientation='vertical', size_hint_y=None, height=50*30)

应该工作。

在GridLayout中，你可以通过将Gridlayout的minimum_height（由子组合的高度计算）绑定到它的高度来做同样的事情。

items.bind(minimum_height=items.setter('height'))

Accordian没有这样的便利方法，所以你必须自己动手。

为了使它更具动态性，您可以像这样绑定到Accordion的children属性：

item.bind(children=self.update_size)

然后像so ::

那样定义update_size

def update_size(self, instance, value):
    # change 50 to what you want your AccordionItem height to be.
    instance.size = 50*len(instance.children)

Kivy ScrollView +手风琴错误

1 个答案: