通过Kivy按钮在不同类中调用函数 [英] Calling Function in a Different Class Through Kivy Button
问题描述
我试图在kivy中调用按钮按钮的功能,该按钮位于与按钮不同的类屏幕中。我尝试在应用程序类中运行该功能,并在那里遇到问题。这里是我想要调用的函数所在的类:
pre $ #带按钮布局的主屏幕
class LandingScreen (屏幕):
def __init __(self,** kwargs):
super(LandingScreen,self).__ init __(** kwargs)
self.buttons = []#为所有按钮在这里
Clock.schedule_once(self._finish_init)
def ChangePic(self):
self.buttons [1] .background_normal ='folder.png'
以下是我试图用它调用的按钮:
< InputScreen @ Screen>:
名称:'input_sc'
FloatLayout:
大小:800,480
id: anchor_1
标签:
text:你想绑定到这个按钮上的什么?
size_hint:(1,.15)
text_size:self.size
pos_hint:{'x':0.11,'top':1}
font_size:28
font_name:'Montserrat-Bold.ttf'
按钮:
root:'landing_sc'
id:filebutton
size:150,150
size_hint:None,None
background_normal:'folder.png'
background_down:'opacity.png'
pos_hint:{'x':0.11,'top':.7}
on_release:
root.manager.transition = FadeTransition()
root.manager.transition.duration = 1.5
app.MakeFolder()
root.IfFolder()
root.ChangeToSlide( )
为了从这个位置调用ChangePic(),我需要做些什么? / p>
另外 - 有没有一种方法可以轻松地与th一起工作在InputScreen类内的LandingScreen类中的e按钮?
谢谢!
$ $ p $
some_variable = LandingScreen()
,然后在按钮中调用ChangePic(),如下所示:
on_release:app.some_variable.ChangePic()
另外,这可以帮助你: StackOverflow , Kivy的Google小组,简介属性
I am trying to call a function on button press in kivy, that is located in a different class screen than the button is located in. I tried running the function in the app class as well and ran into issues there. Here is the class where the function I am trying to call lies:
# Main screen with button layout
class LandingScreen(Screen):
def __init__(self, **kwargs):
super(LandingScreen, self).__init__(**kwargs)
self.buttons = [] # add references to all buttons here
Clock.schedule_once(self._finish_init)
def ChangePic(self):
self.buttons[1].background_normal = 'folder.png'
And here is the button that I am trying to call it with:
<InputScreen@Screen>:
name: 'input_sc'
FloatLayout:
size: 800, 480
id: anchor_1
Label:
text: "What would you like to bind to this button?"
size_hint: (1,.15)
text_size: self.size
pos_hint: {'x': 0.11, 'top': 1}
font_size: 28
font_name: 'Montserrat-Bold.ttf'
Button:
root: 'landing_sc'
id: filebutton
size: 150, 150
size_hint: None, None
background_normal: 'folder.png'
background_down: 'opacity.png'
pos_hint: {'x': 0.11, 'top': .7}
on_release:
root.manager.transition = FadeTransition()
root.manager.transition.duration = 1.5
app.MakeFolder()
root.IfFolder()
root.ChangeToSlide()
What do I have to prefix ChangePic() with in order to call it from this location?
Alternatively- is there a way to easily work with the buttons inside of the LandingScreen class from inside of the InputScreen class?
Thanks!
You can create a variable in your App Class:
some_variable = LandingScreen()
and then in your button call ChangePic() like this:
on_release: app.some_variable.ChangePic()
Also, this can help you: StackOverflow, Kivy's Google Group, Introduction to properties
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