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Tiny StopWatch Application

, 30 Jan 2004
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A tiny app for timing things to 1/2 a second or so. My entry for the smallest useful app contest.

Sample Image - stopwatchapp_image.jpg

Introduction

The code for this Windows application is so compact, it is presented here inline. Belying its small size, however, the app actually solves a real-world problem, namely the need to measure events of a few minutes' duration to about a half-second granularity. How long does Photoshop take to launch? How long have I been on the phone? "I'll bring your stapler back in five minutes." Yeah, right. The Radio Shack Deluxe Sports Stopwatch (63-5017) costs $19.99.

Background

This is my entry in the imaginary "smallest useful app" contest--the entire app requires just 16 lines of user code. Thanks to .NET, the exe file is just 12.5k.

The Source Code

As they do in Microsoft Knowledgebase How-To articles, here are the step-by-step instructions:

  1. Start Microsoft Visual Studio .NET
  2. On the File menu, point to New, and then click Project
  3. Under Project Types, click Visual Basic Projects
  4. Under Templates, click Windows Application. Form1 is created.
  5. Change Form1's Properties: .Text="Click to Start", .FormBorderStyle="FixedToolWindow", .Size="192,64"
  6. Place a new Label control anywhere on the form. Label1 is created.
  7. Change Label1's Properties: .Text="StopWatch", .Dock="Fill", .Font="Georgia, 24pt", .TextAlign="MiddleCenter". Select foreground and background colors to taste (the example is .BackColor=Hot Track, .ForeColor=Menu).
  8. Place a new Timer control on the form. Timer1 is created.
  9. Right-click Form1, and then click View Code
  10. Add the following code to the Form1 class:
    Dim startTime As DateTime

    Private Sub Timer1_Tick(ByVal sender As System.Object, _
     ByVal e As System.EventArgs) Handles Timer1.Tick
        Dim span As TimeSpan = DateTime.Now.Subtract(startTime)
        Label1.Text = span.Minutes.ToString & ":" & _
        span.Seconds.ToString & "." & span.Milliseconds
    End Sub

    Private Sub Label1_Click(ByVal sender As System.Object, _
     ByVal e As System.EventArgs) Handles Label1.Click
        If (Timer1.Enabled) Then
            Me.Text = "Click to Re-start"
            Timer1.Stop()
        Else
            startTime = DateTime.Now()
            Me.Text = "Click to Stop"
            Timer1.Start()
        End If
    End Sub

To use the stopwatch, click inside its window. To stop it, click again. Clicking again will reset the stopwatch to 0Blush | :O .0 and start it counting again. For fancy effects like lap timing, just launch several copies of the StopWatch app at once.

Points of Interest

There is nothing very interesting here except how an app so simple and small can be surprisingly useful.

History

01/31/04 AD: Initial

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Alastair Dallas
Web Developer
United States United States
Alastair Dallas is a programmer, systems architect, and information designer with over 20 years experience at companies including Ashton-Tate, Lotus, Netscape, Documentum, and a wide variety of startups. Languages include C#, C, C++, Java, JavaScript, Perl, Python, and VB (in alphabetical order) as well as DHTML, XML, and related technologies. He has written 3 books, 2 on computer topics, and is President of Infospect Press.

Comments and Discussions

 
Questioninterval time Pinmemberhendry Gunawan3-Mar-09 17:43 
QuestionTime Interval Pinmemberhendry Gunawan3-Mar-09 17:36 
GeneralGood!! Pinmembernma20200018-Mar-08 3:19 
GeneralGOOD Pinmemberdubbele onzin13-Nov-07 19:10 
GeneralThx Man It works!!!! Pinmemberdissanayake1-Oct-07 5:22 
Generalthank you soo much PinmemberSyed Ali hasan22-Aug-07 3:32 
GeneralSmall suggestion: use Environment.TickCount Pinmembernmitha4-Jan-07 10:50 
GeneralCompact framework PinmemberPhilvis19955-May-06 4:07 
QuestionHelp? Pinmemberkevinbaum15-Mar-06 3:20 
GeneralThanks Pinmemberarpita200620-Feb-06 21:17 
QuestionHow do I get the Timer to start from Zero instead of the current Time? Pinmemberensuvari8-Nov-05 3:48 
GeneralThanks Pinmembervbtango20-Oct-05 16:52 
QuestionContinue the counter instead of resetting? Pinmemberpiniata21-Apr-05 21:55 
Hi Alastair,
this has helped me out a lot too... but I have tried unsuccessfully to make the stopwatch continue where it left off after 'stop' then 'continue' buttons are clicked. A new timer is started after the 'stop' button is clicked, and the 'continue' button only reveals the new timer counting away. Any help?
thanks in advance,
Alex.
GeneralHelped me out a treat PinmemberVicbelly17-Mar-05 8:30 
GeneralCouldn't get Stopwatch to work PinmemberGreg S.22-Oct-04 3:54 
GeneralRe: Couldn't get Stopwatch to work PinmemberGreg S.25-Oct-04 12:40 
GeneralA good starting point PinmemberMichael Mogensen20-Mar-04 23:56 
AnswerRe: A good starting point PinmemberManaClear2-Mar-06 14:49 

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