54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
import random
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from Tkinter import *
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import tkMessageBox
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class Application(Frame):
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def __init__(self, master):
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Frame.__init__(self, master)
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self.counter = 0
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self.contents = StringVar()
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self.contents.set(str(self.counter))
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self.pack(expand=True, fill='both', padx=10, pady=15)
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self.create_widgets()
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def increment(self, *args):
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self.counter += 1
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self.update_entry()
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def random(self):
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if tkMessageBox.askyesno("Confirmation", "Reset to random value ?"):
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self.counter = random.randint(0, 5000)
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self.update_entry()
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def entry_updated(self, event, *args):
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if not event.char:
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return 'break'
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if not event.char.isdigit():
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tkMessageBox.showerror('Error', 'Invalid input !')
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return 'break'
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self.counter = int('%s%s' % (self.contents.get(), event.char))
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def update_entry(self):
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self.contents.set(str(self.counter))
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self.entry['textvariable'] = self.contents
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def create_widgets(self):
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options = {'expand': True, 'fill': 'x', 'side': 'left', 'padx': 5}
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self.entry = Entry(self)
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self.entry.bind('<Key>', self.entry_updated)
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self.entry.pack(**options)
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self.update_entry()
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self.increment_button = Button(self, text='Increment', command=self.increment)
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self.increment_button.pack(**options)
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self.random_button = Button(self, text='Random', command=self.random)
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self.random_button.pack(**options)
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if __name__ == '__main__':
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root = Tk()
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try:
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app = Application(master=root)
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app.master.title("Rosetta code")
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app.mainloop()
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except KeyboardInterrupt:
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root.destroy()
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