如何在Kivy python中最大化滚动条?

问题描述

我在猕猴桃中使用multiTab.如何放大滚动条，以便可以通过鼠标移动(上移或下移)滚动条.我正在使用BoxLayout和RecycleView.下面的代码适用于gridLayout，但不适用于BoxLayout:

I am using multiTab in kivy. How to enlarge the scrollbar so that scrollbar can be moved(up_down) by mouse. I am using BoxLayout and RecycleView. The code below was working with gridLayout, but not in BoxLayout:

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

推荐答案

这是一个如何扩展ScrollView以获得可拖动滑块的示例.

Here is an example of how to extend ScrollView to also get a dragable slider.

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.uix.label import Label

Builder.load_string("""
<ScrollSlider>:
    ScrollView:
        id: scrlvw
        bar_width: 0
        GridLayout:
            id: grid
            size_hint_y:None
            cols:1
            height: self.minimum_height
            scroll_y: slider.value
            on_touch_move: slider.value = self.scroll_y
    Slider:
        size_hint_x: None
        width: root.width*0.2
        id: slider
        min: 0
        max: 1
        orientation: 'vertical'
        value: scrlvw.scroll_y
        on_value: scrlvw.scroll_y = self.value

""")


class ScrollSlider(BoxLayout):

    def custom_add(self, widget):
        self.ids.grid.add_widget(widget)

class MyApp(App):


    def build(self):
        scrollslider = ScrollSlider()
        for i in range(1, 100):
            scrollslider.custom_add(Label(text=str(i), height=100, size_hint_y=None))
        return scrollslider

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

您需要使用custom_add在ScrollSlider中添加小部件，或者将它们添加到kivy中的GridLayout中.

You need to use the custom_add to add widgets in the ScrollSlider or add them to the GridLayout in kivy.

我从提供的@Edvardas Dlugauskas链接中获得了一些启发.

I took some inspiration from the link @Edvardas Dlugauskas provided.

您提供的代码不适用于BoxLayout，因为BoxLayout仅占用其父级的大小.为了能够滚动，您需要将sth添加到大于ScrollView本身的ScrollView中.

The code you provided does not work with BoxLayout because BoxLayout just takes the size of its parent. To be able to scroll you need to add sth into ScrollView which is larger than the ScrollView itself.

这篇关于如何在Kivy python中最大化滚动条?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！