Python Kivy中的进度栏??小部件

Kivy是Python中与平台无关的GUI工具。由于它可以在Android, IOS, Linux和Windows等操作系统上运行。它基本上是用于开发Android应用程序, 但这并不意味着它不能在桌面应用程序上使用。

????Kivy教程–通过示例学习Kivy。

进度栏小部件：
ProgressBar小部件用于可视化某些任务的进度。当前仅支持水平模式：垂直模式尚不可用。
进度栏没有交互元素, 并且是仅用于显示的窗口小部件。
要使用它, 只需分配一个值以指示当前进度：

from kivy.uix.progressbar import ProgressBar pb = ProgressBar( max = 1000 ) # this will update the graphics automatically (75 % done) pb.value = http://www.srcmini.com/750

要使用Progressbar小部件, 你必须通过以下命令将其导入：从kivy.uix.progressbar import ProgressBar

妓女的酒吧接受两个参数：
1)最大值：允许的最大值。它是一个数值属性, 默认为100。
2)值：滑块的当前值

Basic Approach:1) import kivy 2) import kivyApp 3) import progressbar 4) import Boxlayout(according to need) 5) Set minimum version(optional) 6) Create Layout class: 7) Create App class 8) return Layout/widget/Class(according to requirement) 9) Run an instance of the class

注意：
该代码用于完整的进度条, 你只需要专注于进度条的创建和工作即可, 而无需强调其他属性, 我将在以后介绍它们。
你首先必须单击文件中的按钮, 然后进度条将显示。
该方法的实施：

# Program to Show how to create a Progressbar in .kv file # import kivy module import kivy # base Class of your App inherits from the App class. # app:always refers to the instance of your application from kivy.app import App# this restrict the kivy version i.e # below this kivy version you cannot # use the app or software kivy.require( '1.9.0' )# The ProgressBar widget is used to # visualize the progress of some task from kivy.uix.progressbar import ProgressBar # BoxLayout arranges children in a vertical or horizontal box. # or help to put the children at the desired location. from kivy.uix.boxlayout import BoxLayout # The Clock object allows you to schedule a # function call in the future from kivy.clock import Clock# The Button is a Label with associated actions # that is triggered when the button # is pressed (or released after a click /touch). from kivy.uix.button import Button # Popup widget is used to create popups. # By default, the popup will cover # the whole "parent" window. # When you are creating a popup, # you must at least set a Popup.title and Popup.content. from kivy.uix.popup import Popup # A Widget is the base building block # of GUI interfaces in Kivy. # It provides a Canvas that # can be used to draw on screen. from kivy.uix.widget import Widget # ObjectProperty is a specialised sub-class # of the Property class, so it has the same # initialisation parameters as it: # By default, a Property always takes a default # value[.] The default value must be a value # that agrees with the Property type. from kivy.properties import ObjectProperty # Create the widget class class MyWidget(Widget): progress_bar = ObjectProperty()def __init__( self , * * kwa): super (MyWidget, self ).__init__( * * kwa)self .progress_bar = ProgressBar() self .popup = Popup( title = 'Download' , content = self .progress_bar ) self .popup.bind(on_open = self .puopen) self .add_widget(Button(text = 'Download' , on_release = self .pop)) # the function which works when you clicj = k the button def pop( self , instance): self .progress_bar.value = http://www.srcmini.com/1 self .popup. open () # To continuesly increasing the value of pb. def next ( self , dt): if self .progress_bar.value> = 100 : return False self .progress_bar.value + = 1def puopen( self , instance): Clock.schedule_interval( self . next , 1 /25 ) # Create the App class class MyApp(App): def build( self ): return MyWidget() # run the App if __name__ in ("__main__" ): MyApp().run()

【Python Kivy中的进度栏??小部件】输出如下：
图片1