使用Kivy Touchinput和Kivyfile

Question

我正在使用python和kivy。 我的目标是使用TouchInput和kivy文件。 问题是我在kv文件中有一个请求：

<MainScreen>:
    name: "main"
    GridLayout:
        rows: 1
        Image:
            source: 'image.png'
            on_touch_down: if self.collide_point(*args[1].pos): root.doSomething()

单独运行效果很好，但是在我添加了TouchInput之后：

MainScreen:
   def doSomething:
     print("something")
   def on_touch_down(self,touch):
     print("down")
   def on_touch_move(self, touch):
     print("move")
   def on_touch_up(self, touch):
     pass

仅TouchInput被识别并且kivy文件不执行它的请求

Answer 1

将以下内容添加到on_touch_down()，on_touch_up()和on_touch_move()函数中。有关详细信息和输出，请参考示例。

摘要

    if super(MainScreen, self).on_touch_...(touch):
        return True
    if not self.collide_point(*touch.pos):
        return False
    print('...')
    return True

示例

main.py

from kivy.app import App
from kivy.uix.screenmanager import Screen


class MainScreen(Screen):
    def doSomething(self):
        print("something")

    def on_touch_down(self, touch):
        if super(MainScreen, self).on_touch_down(touch):
            return True
        if not self.collide_point(*touch.pos):
            return False
        print('down')
        return True

    def on_touch_move(self, touch):
        if super(MainScreen, self).on_touch_move(touch):
            return True
        if not self.collide_point(*touch.pos):
            return False
        print("move")
        return True

    def on_touch_up(self, touch):
        if super(MainScreen, self).on_touch_up(touch):
            return True
        if not self.collide_point(*touch.pos):
            return False
        print("up")
        return True


class TestApp(App):

    def build(self):
        return MainScreen()


if __name__ == "__main__":
    TestApp().run()

test.kv

#:kivy 1.10.0

<MainScreen>:
    name: "main"
    GridLayout:
        rows: 1
        Image:
            canvas.before:
                Color:
                    rgba: 1, 1, 1, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            source: 'kivyLogo.png'
            on_touch_down:
                if self.collide_point(*args[1].pos): root.doSomething()

        Image:
            canvas.before:
                Color:
                    rgba: 0, 0, 1, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            source: 'raspberrypi.png'

输出