简单的kivy标签示例

时间:2013-06-15 04:40:59

标签: android python kivy

我是使用Kivy进行Android开发的新手。我创建了一个如下所示的标签结构:

from kivy.app import App
from kivy.uix.tabbedpanel import TabbedPanel
from kivy.uix.tabbedpanel import TabbedPanelHeader
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.image import Image

class TabbedPanelApp(App):
  def build(self):
      tb_panel= TabbedPanel()

      # Create text tab          
      th_text_head = TabbedPanelHeader(text='Text tab')
      th_text_head.content= Label(text='This is my text content')

      # Create image tab
      th_img_head= TabbedPanelHeader(text='Image tab')
      th_img_head.content= Image(source='sample.jpg',pos=(400, 100), size=(400, 400))

      # Create button tab
      th_btn_head = TabbedPanelHeader(text='Button tab')
      th_btn_head.content= Button(text='This is my button',font_size=20)

      tb_panel.add_widget(th_text_head)
      tb_panel.add_widget(th_img_head)
      tb_panel.add_widget(th_btn_head)          

      return tb_panel

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

我想将登录小部件添加到默认选项卡。登录小部件的代码是:

import kivy 
kivy.require('1.0.5')

from kivy.uix.gridlayout import GridLayout 
from kivy.uix.boxlayout import BoxLayout 
from kivy.uix.button import Button 
from kivy.app import App 
from kivy.lang import Builder 
from kivy.uix.widget import Widget 
from kivy.properties import ObjectProperty, StringProperty 

class loginView(Widget): 
    status=ObjectProperty(None) 
    def validate(self,username,password): 
        print "user - ", username
        print "pwd - ", password
        if username == password: 
            print "in if - ", username,password     
            self.status.text="Login sucess" 
        #mainClass().run() 
        else: 
            self.status.text="Login failed" 

class afterLogin(Widget): 
    def dumb(self): 
        l = BoxLayout(cols="2") 
        btn = Button(text="ad") 
        l.add_widget(btn) 
        print "flag" 

class mainClass(App): 
    def build(self): 
        return loginView()  

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

和kv文件是:

#:kivy 1.0.5 

<loginView>: 
    status:result 
    Label: 
         text:"Contacts Manager" 
         pos:600,600 
         font_size:40 


    Label: 
         text:"Username" 
         pos:450,400 

    Label: 
         text:"Password" 
         pos:450,300 

    TextInput: 
         multiline:False 
         pos:600,425 
         size:200,45 
         font_size:20 
         id:username 

    TextInput: 
         multiline:False 
         pos:600,325 
         password:True 
         size:200,45 
         font_size:20 
         id:password 
    Button: 
         text:"Login" 
         size:100,50 
         pos:600,250 
         on_press:root.validate(username.text,password.text) 
    Label: 
         text:"" 
         pos:600,100 
         id:result 
<afterLogin>: 
    Label: 
         text:"Welcome" 

如何将此代码添加到默认标签中?

2 个答案:

答案 0 :(得分:4)

您可以使用以下2个属性:default_tab_textdefault_tab_content

因此,假设您的登录代码是以下代码(您的登录代码不起作用):

import kivy 
kivy.require('1.0.5')

from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label 
from kivy.lang import Builder

Builder.load_string("""
<Loginview>:
    cols:2
    padding: 200
    Label: 
        text: "username"
    TextInput:
    Label: 
        text: "password"
    TextInput:
""")

#Name of classes are always uppercase
class LoginView(GridLayout): 
    pass

假设代码与main.py(具有TabbedPanelApp的代码)位于同一文件夹中。然后

1)导入LoginView(我把它放在大写,因为它是一个类)

from login import LoginView

2)修改build的{​​{1}}方法,如下所示

TabbedPanelApp

您还可以使用class TabbedPanelApp(App): def build(self): tb_panel= TabbedPanel() tb_panel.default_tab_text = "Login Tab" tb_panel.default_tab_content = LoginView() 属性修改整个TabbedPanelHeader,甚至可以使用default_tab_cls属性停用默认选项卡。所以,你有很多选择。只需查看doc

即可

答案 1 :(得分:2)

假设python文件的名称是loginview.py并且它位于main.py的同一文件夹中,将以下内容添加到代码中应该可以解决您的问题(它已经在我的计算机上运行):

from loginview import loginView

class TabbedPanelApp(App):
  def build(self):
      tb_panel= TabbedPanel()

      tb_panel.default_tab_text = "Login Tab"
      tb_panel.default_tab_content = loginView()

但请注意,类应该用大写字母书写。这不是强制性的,但这是一种很好的做法。像loginView这样的名称适用于其他语言的变量。