如何在Kivy Python中爲GridLayout的某些按鈕設置高度？

Question

我正在與kivy一個應用程序，我有一個問題，涉及GridLayout。我有一個不同行的屏幕，我希望最後一行的按鈕始終具有相同的屏幕高度的11.1％。我試圖修改按鈕中的屬性高度，但無法正常工作。與size_hint_y工作正常，但事實是，我想要height，因爲屏幕將不總是相同數量的行（是響應和它取決於以前的屏幕選擇）。我在這裏附上我已經通過命令Window.height/9計算的屬性高度完成的代碼：

from kivy.app import App 
from kivy.uix.label import Label 
from kivy.uix.gridlayout import GridLayout 
from kivy.uix.textinput import TextInput 
from kivy.uix.button import Button 
from kivy.uix.screenmanager import ScreenManager, Screen 
from kivy.core.window import Window 


class LoginScreen(GridLayout): 
    def __init__(self,**kwargs): 
     super(LoginScreen, self).__init__(**kwargs) 
     self.cols=2 
     self.add_widget(Label(text='Subject')) 
     self.add_widget(Label(text='')) 
     self.add_widget(Label(text='1')) 
     self.add_widget(TextInput(multiline=False)) 
     self.add_widget(Label(text='2')) 
     self.add_widget(TextInput(multiline=False)) 
     self.add_widget(Label(text='3')) 
     self.add_widget(TextInput(multiline=False)) 
     self.add_widget(Label(text='4')) 
     self.add_widget(TextInput(multiline=False)) 
     b1=Button(text='Exit',background_color=[0,1,0,1],height=int(Window.height)/9.0) #doesn't work properly 
     self.add_widget(b1) 
     b2=Button(text='Run',background_color=[0,1,0,1],height=int(Window.height)/9.0) #doesn't work properly 
     self.add_widget(b2) 
     b1.bind(on_press=exit) 




class SimpleKivy(App): 
    def build(self): 
     return LoginScreen() 


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

我知道這可能與kivy語言在一個更簡單的方法，但我的應用程序是更好地做這個做辦法。如果有人知道如何解決這個問題，我將非常感激。

Answer 1

如果你想在一個網格/盒佈局的窗口小部件有一個固定的大小，你應該設置其size_hint到None第一。在這些任務中總是使用kivy lang - 沒有例外。

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

from kivy.lang import Builder 

gui = ''' 
LoginScreen: 

    GridLayout: 
     cols: 2 

     Label: 
      text: 'Subject' 

     Label: 

     Label: 
      text: '1' 

     SingleLineTextInput: 

     Label: 
      text: '2' 

     SingleLineTextInput: 

     Label: 
      text: '3' 

     SingleLineTextInput: 

     Label: 
      text: '4' 

     SingleLineTextInput: 

     GreenButton: 
      text: 'Exit' 
      on_press: app.stop() 

     GreenButton: 
      text: 'Run' 


<SingleLineTextInput@TextInput>: 
    multiline: False 


<GreenButton@Button>: 
    background_color: 0, 1, 0, 1 
    size_hint_y: None 
    height: self.parent.height * 0.111 
''' 


class LoginScreen(Screen): 
    pass 


class SimpleKivy(App): 

    def build(self): 
     return Builder.load_string(gui) 


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

Answer 2

試試這個

class LoginScreen(GridLayout): 
def __init__(self,**kwargs): 
    super(LoginScreen, self).__init__(**kwargs) 
    self.cols=2 
    self.add_widget(Label(text='Subject')) 
    self.add_widget(Label(text='')) 
    self.add_widget(Label(text='1')) 
    self.add_widget(TextInput(multiline=False)) 
    self.add_widget(Label(text='2')) 
    self.add_widget(TextInput(multiline=False)) 
    self.add_widget(Label(text='3')) 
    self.add_widget(TextInput(multiline=False)) 
    self.add_widget(Label(text='4')) 
    self.add_widget(TextInput(multiline=False)) 
    b1=Button(text='Exit',background_color=[0,1,0,1],size_hint_y=None, height=int(Window.height)/8.9) 
    self.add_widget(b1) 
    b2=Button(text='Run',background_color=[0,1,0,1],size_hint_y=None, height=int(Window.height)/8.9) 
    self.add_widget(b2) 
    b1.bind(on_press=exit) 

編輯，以改變它是在11％。

這裏的一個按鈕保持在11％的響應窗口大小，每當窗口被調整大小時重繪網格層（通過綁定到'on_resize'）。

from kivy.app import App 
from kivy.uix.label import Label 
from kivy.uix.gridlayout import GridLayout 
from kivy.uix.textinput import TextInput 
from kivy.uix.button import Button 
from kivy.uix.screenmanager import ScreenManager, Screen 
from kivy.core.window import Window 
from kivy.uix.floatlayout import FloatLayout 


class LoginScreen(GridLayout): 


def __init__(self,**kwargs): 
    super(LoginScreen, self).__init__(**kwargs) 

    #init and add grid layer 
    self.cols=2 
    self.layout = GridLayout(cols=self.cols) 
    self.add_widget(self.layout) 
    #function to set the buttons based on the current window size 
    self.set_content(Window.width, Window.height) 
    #bind above function to get called whenever the window resizes 
    Window.bind(on_resize=self.set_content) 


def set_content(self, width, height, *args): 
    #first remove the old sized grid layer 
    self.remove_widget(self.layout) 
    #now build a new grid layer with the current size 
    self.layout =GridLayout(cols=self.cols) 
    self.layout.add_widget(Label(text='Subject')) 
    self.layout.add_widget(Label(text='')) 
    self.layout.add_widget(Label(text='1')) 
    self.layout.add_widget(TextInput(multiline=False)) 
    self.layout.add_widget(Label(text='2')) 
    self.layout.add_widget(TextInput(multiline=False)) 
    self.layout.add_widget(Label(text='3')) 
    self.layout.add_widget(TextInput(multiline=False)) 
    self.layout.add_widget(Label(text='4')) 
    self.layout.add_widget(TextInput(multiline=False)) 
    b1=Button(text='Exit',background_color=[0,1,0,1],size_hint_y=None, height=int(Window.height)/8.9) 
    self.layout.add_widget(b1) 
    b2=Button(text='Run',background_color=[0,1,0,1],size_hint_y=None, height=int(Window.height)/8.9) 
    self.layout.add_widget(b2) 
    b1.bind(on_press=exit) 
    #add the newly sized layer 
    self.add_widget(self.layout) 


class SimpleKivy(App): 
def build(self): 
    return LoginScreen() 


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