Module vs. DynamicModule wrt ProgressIndicator

Question

Why does the following work for Module but not DynamicModule?

Module[{test}, 
  test = 0;
  Column[{Button["Calc", 
            test = 0.1; Pause[1.0]; 
            test = 0.25; Pause[1.0]; 
            test = 0.5; Pause[1.0]; 
            test = 0.75; Pause[1.0]; 
            test = 0.9; Pause[1.0]; 
            test = 1.0, Method -> "Queued"], 
  Row[{"Progress: ", ProgressIndicator[Dynamic[test]]}]}]]

DynamicModule[{test}, 
  test = 0;
  Column[{Button["Calc", 
            test = 0.1; Pause[1.0]; 
            test = 0.25; Pause[1.0]; 
            test = 0.5; Pause[1.0]; 
            test = 0.75; Pause[1.0]; 
            test = 0.9; Pause[1.0]; 
            test = 1.0, Method -> "Queued"], 
  Row[{"Progress: ", ProgressIndicator[Dynamic[test]]}]}]]

If I have other reasons to need the module to be a DynamicModule, how can I get this functionality to work?

Because of the most annoying bug in UI: 100828, your example is even worse to find a fix for. — Kuba, Sep 11 '19 at 18:43
Wow. Yes, that is an annoying bug, @Kuba! And thank you @chuy, that does indeed work beautifully. — Kevin Ausman, Sep 11 '19 at 18:58

Kevin Ausman · Accepted Answer · 2019-09-11T19:22:02.843

6

Thanks to @chuy, we have a solution:

DynamicModule[{test}, 
  test = 0;
  Column[{Button["Calc", 
            test = 0.1; Pause[1.0]; 
            test = 0.25; Pause[1.0]; 
            test = 0.5; Pause[1.0]; 
            test = 0.75; Pause[1.0]; 
            test = 0.9; Pause[1.0]; 
            test = 1.0, Method -> "Queued"], 
  Row[{"Progress: ", 
       ProgressIndicator[Dynamic[Refresh[test]]]}]}]]

edited Sep 11 '19 at 19:22

answered Sep 11 '19 at 18:59

Kevin Ausman

2,267
8
16

I don't think you need the TrackedSymbols option. – chuy Sep 11 '19 at 19:08
Ah, thank you! This is my first time to use Refresh, so I didn't even think to leave it out. I'll fix the answer. – Kevin Ausman Sep 11 '19 at 19:21

Module vs. DynamicModule wrt ProgressIndicator

1 Answers1