Question

Progress Bar Script

Asked by: jeffmace

I saw this progress bar script in the Cold Fusion Contruction Kit.  I just want to know where this script is being made to wait 5 seconds as noted in the comments of the script? I just do not see what is going on.  Is there anyway to not make it wait 5 seconds?

<!---
  Filename:     FlushMeter.cfm
  Created by:   Nate Weiss (NMW)
  Purpose:      Diplays a progress meter as a lengthy task is completed
--->


<HTML>
<HEAD><TITLE>&lt;CFFLUSH&gt; Example</TITLE></HEAD>
<BODY>
 
  <!--- Initial Message --->
  <P><STRONG>Please Wait</STRONG><BR>
  We are processing your order.<BR>
 
  <!--- Create the "Meter" image object --->
  <!--- Initially, it displays a blank GIF --->
  <IMG NAME="Meter" SRC="../images/PercentBlank.gif"
    WIDTH="200" HEIGHT="16" ALT="" BORDER="0">
   
  <!--- Flush the page buffer --->  
  <CFFLUSH>

  <!--- Loop from 0 to 25 to 50 to 75 to 100 --->
  <CFLOOP FROM="0" TO="100" STEP="25" INDEX="i">
    <!--- Time-consuming process goes here --->
    <!--- Here, ColdFusion waits for 5 seconds as an example --->
    <!--- Do not use this technique in actual code! --->
    <CFSET InitialTime = Now()>
    <CFLOOP CONDITION="DateDiff('s', InitialTime, Now()) LT 2"></CFLOOP>
   
    <!--- Change the SRC attribute of the Meter image --->
    <CFOUTPUT>
      <SCRIPT LANGUAGE="JavaScript">
        document.images["Meter"].src = '../images/Percent#i#.gif';
      </SCRIPT>
    </CFOUTPUT>
    <CFFLUSH>
  </CFLOOP>

  <!--- Display "Success" message --->
  <P><STRONG>Thank You.</STRONG><BR>
  Your order has been processed.<BR>
</BODY>
</HTML>

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Asked On
2003-09-30 at 12:55:38ID20753246
Tags

progress

,

bar

,

coldfusion

Topic

ColdFusion Application Server

Participating Experts
3
Points
500
Comments
4

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Answers

 

by: danrosenthalPosted on 2003-09-30 at 18:10:07ID: 9463084

this line here is the line that is "waiting"...

 <CFLOOP CONDITION="DateDiff('s', InitialTime, Now()) LT 2"></CFLOOP>

but it looks like 2 seconds to to me.
So every 2 seconds it increments the outer cfloop (0 to 25 to 50 to 75 to 100)

 

by: anandkpPosted on 2003-09-30 at 22:31:24ID: 9463929

Hi Jeff,

if U notice the code carefully - u'll see that the CFLOOP has  a "STEP" value of 25 ... try & reduce this to "1" to that u can see the progress bar going in as the loop iterates ...

the code dosent wait for 5 second or soemthing - thats the time taken by teh CFLOOP to iterate 100 times
so if u dont want this to iterate - then reduce the loop count by making it to run from 0 - 10 instead of 0 - 100

it also has a internal loop - that checks the time difference for 2 seconds

so u have a total time taken of = 2 seconds * the number of time outer loop interates

changing the values of internal loop to 1 OR removing teh internal loop, may make the difference in teh time taken ...

let me know

K'Rgds
Anand

 

by: anandkpPosted on 2003-09-30 at 22:34:07ID: 9463937

But the fact is that code is just a example - u'll need to replace that code with soemthing that u have in ur project
so that the time taken is actually by ur code & not be mearly running the loop 100 times & nesting it with anotehr one for 2 seconds each

so that code ne-how has to be removed & replaced by ur code ... & then it wld display the progress bar ... depending on how much time YOUR CODE takes to execute.

PS : the code has a line in there <!--- Do not use this technique in actual code! --->

K'Rgds
Anand

 

by: cheekycjPosted on 2003-10-01 at 06:12:35ID: 9466350

check out this code.

Maybe you can leverage it:
http://www.servletsuite.com/servlets/wait.htm

CJ

20120131-EE-VQP-002

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