如何在Kivy Listview中格式化滚动条

Question

如何在Kivy Listview中格式化滚动条

4

我有一个包含自定义按钮的ListView。如何调整滚动条的格式，使其始终可见（如果有需要滚动的内容...），将其扩宽（10个点而不是默认的2个点）并给它不同的颜色？

DoScroll.py文件：

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.listview import ListItemButton

class ShowItems(BoxLayout):
    def get_list(self):
        self.results.item_strings = {"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"}

    def show_capital(self, capital):
        print capital

class CapitalButton(ListItemButton):
    pass

class DoScrollApp(App):
    pass

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

这里是DoScroll.kv文件。

#: import DoScroll DoScroll
#: import ListAdapter kivy.adapters.listadapter.ListAdapter


<CapitalButton>:
    text_size: self.width - 50, None
    halign: 'left'
    valign: 'middle'
    font_size: 16
    on_press: app.root.show_capital(self.text)

ShowItems:

<ShowItems>:
    results: results_list
    orientation: "vertical"
    BoxLayout:
        height: "40dp"
        size_hint_y: None
        Button:
            text: "Get the list"
            on_press: root.get_list()
    ListView:
        id: results_list
        adapter:
            ListAdapter(data=[], args_converter=lambda row_index, 
                an_obj: {'text': an_obj,'size_hint_y': None,'height': 40}, cls=DoScroll.CapitalButton)

- Bill Bridge

1个回答

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- zeeMonkeez · Accepted Answer

ListView 包含一个 ScrollView，ScrollView 内部又包含一个 GridView，用于显示列表项。相应的 kv 规则如下（来自 listview.py）：

<ListView>:
    container: container
    ScrollView:
        pos: root.pos
        on_scroll_y: root._scroll(args[1])
        do_scroll_x: False
        GridLayout:
            cols: 1
            id: container
            size_hint_y: None

ScrollView有三个属性：bar_width、bar_color和bar_inactive_color。这些属性可以通过lv.container.parent.bar_width等方式访问，其中lv = ListView()。