Jnuw
10th May 2006 19:54 UTC

Math plugin help
Hello all.

Well I made a little nsis script to read all txt files in a folder, inspecting them based on some criteria. This works just fine. The inspection process takes place in a function, and therefore the progress bar does not accurately display the true progress of the script.

What I would like to do is use Stu's RealProgress plug-in to manually set the progress bar. My strategy (feel free to offer up an alternative) is to get then number of files in the folder, say 250, then divide by 100, giving me 2.5 in this case.

Then after checking each file, I do this:

(after 1 file checked)
$NumFilesChecked/2.5 = .4 --> rounded = $CurrentProgress
RealProgress::SetProgress /NOUNLOAD $CurrentProgress

(after 2 files checked)
$NumFilesChecked/2.5 = .8 --> rounded = $CurrentProgress
RealProgress::SetProgress /NOUNLOAD $CurrentProgress

(after 3 files checked)
$NumFilesChecked/2.5 = 1.2 --> rounded = $CurrentProgress
RealProgress::SetProgress /NOUNLOAD $CurrentProgress

Ok, so you get it right. If this is an acceptable strategy for manually setting the RealProgress bar, I just need the syntax for using the Math Plug-in to do decimal division, and rounding (separately).

I have searched like crazy, but just can't seem to understand the math::script usage, can you help me? Thanks all for looking.

Jnuw

Afrow UK
10th May 2006 20:03 UTC

$CurrentFile / $TotalFiles * 100

Progress bar value should be out of 100, i.e. a percentage figure with no decimal point.

-Stu

Jnuw
10th May 2006 22:56 UTC

Hi Stu, your right, that makes more sense. But I'm still going to need the math plugin for that right, otherwise with IntOp I'll lose the decimals: (IntOp $0 2 / 250 ) equals 0, when it really is .008 right?

Can I get the syntax for the math plug in to do that division, multiplication, and rounding? Or am I still missing something? Thanks so much for your help.

Comperio
11th May 2006 01:03 UTC

I would question whether or not the decimal numbers really matter with a progress bar. As long as you are relatively close, it will still give the end user a relative idea of how far into a process your install really is.

If you still decide you need to do floating point operations, you might take a look at the this floating op plugin.

Jnuw
11th May 2006 19:32 UTC

Thanks guys, got it to work!