Jam/status_bar.py

from kivy.uix.label import Label
from kivy.graphics import Color,Rectangle
from kivy.utils import escape_markup

class Status_bar(Label):

    def __init__(self,app,**kwargs):
        # app is used to share information between widgets
        self.app=app

        # width of a character
        self.char_width=9

        # unformatted text
        self.raw_text=""

        # a one-time message that shows up over the bar
        self.message=""

        # init Label
        super(Status_bar,self).__init__(**kwargs)

    def set_text(self,string):
        self.raw_text=string
        self.draw()

    def draw(self):
        # if message is not empty, draw message instead
        if self.message!="":
            self.text=self.message[:min(len(self.message),int(self.width/self.char_width))]
            self.message=""
            return

        # do not wrap
        self.text=self.raw_text[:min(len(self.raw_text),int(self.width/self.char_width))]