[英]When RelativeLayout is into a ScrollView, moving TextView with touch doesn't work correctly
[英]Kivy ScrollView Doesn't work with on_touch_down method
我正在嘗試在Widget類中使用ScrollView,但是當我放置on_touch_down方法時它不起作用。 怎么了 如何解決呢?
這是一個代碼:
from kivy.app import App
from kivy.core.window import Window
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.widget import Widget
Window.size = (520, 960)
class GameManager(Widget):
def __init__(self, **kwargs):
super(GameManager, self).__init__(**kwargs)
layout = GridLayout(cols=1, spacing=10, size_hint_y=None)
layout.bind(minimum_height=layout.setter('height'))
for i in range(100):
btn = Button(text=str(i), size_hint_y=None, height=40)
layout.add_widget(btn)
root = ScrollView(size_hint=(1, None), size=(Window.width/2, Window.height*3/4))
root.add_widget(layout)
self.add_widget(root)
#When I delete this method everything is fine
def on_touch_down(self, touch):
if self.collide_point(*touch.pos):
pass
class ScrollViewApp(App):
game = GameManager()
touch_down
事件沿小部件樹傳播,首先傳遞給根小部件,然后讓每個小部件將觸摸傳遞給其子級。 問題是,您on_touch_down
方法,並且事件沒有傳播,因此,您的ScrollView
不響應此事件。
您應該只調用父級的on_touch_downd
方法以允許事件傳播:
def on_touch_down(self, touch):
if self.collide_point(*touch.pos):
pass
super(GameManager, self).on_touch_down(touch)
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