Progress Bar

From IronPython Cookbook

A simple example of using the Windows Forms Progress Bar.

The progress bar is in a form shown modally (shown with ShowDialog). Another thread is launched, which periodically updates the progress bar - which it has to do by invoking back onto the control thread.

import clr
clr.AddReference('System.Windows.Forms')

from System.Windows.Forms import Application, Form, ProgressBar
from System.Threading import ThreadStart, Thread
from IronPython.Runtime.Calls import CallTarget0


class ProgressBarDialog(Form):
    def __init__(self):
        self.Text = 'Progress Bar Example'
        pb = ProgressBar()
        pb.Minimum = 1
        pb.Maximum = 100
        pb.Step = 1
        pb.Value = 1
        
        pb.Width = 400
        self.Controls.Add(pb)
        self.prog = pb
        
        self.Shown += self.startProgress
        
        
    def startProgress(self, s, e):
        def update():
            for i in range(100):
                print i
                def step():
                    self.prog.Value = i + 1
                self.Invoke(CallTarget0(step))
                Thread.Sleep(30)
                    
            print 'Done'
        t = Thread(ThreadStart(update))
        t.Start()


Application.EnableVisualStyles()
f = ProgressBarDialog()
f.ShowDialog()

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