CODEWITHSUNDEEP
wolfram-mathematicamathematica-frontend
Alexey Popkov
Alexey Popkov

Reputation: 9425

Self-destructive Button inside Column

How to create a Button which will be displayed only when the value of some global FrontEnd setting is False and will self-destruct with entire row of the Column after pressing it setting this value to True?

I need something like this:

Column[{"Item 1", "Item 2", 
  Dynamic[If[
    Last@Last@Options[$FrontEnd, "VersionedPreferences"] === False, 
    Button["Press me!", 
     SetOptions[$FrontEnd, "VersionedPreferences" -> True]], 
    Sequence @@ {}]]}]

But with this code the Button does not disappear after pressing it. Is it possible to make it self-destructive?

The final solution based on ideas by belisarius and mikuszefski:

PreemptProtect[SetOptions[$FrontEnd, "VersionedPreferences" -> False];
   b = True];

Dynamic[Column[
  Join[{"Item 1", "Item 2"}, 
   If[Last@Last@Options[$FrontEnd, "VersionedPreferences"] === False &&
      b == True, {Button[
      Pane[Style[
        "This FrontEnd uses shared preferences file. Press this \
button to set FrontEnd to use versioned preferences file (all the \
FrontEnd settings will be reset to defaults).", Red], 300], 
      AbortProtect[
       SetOptions[$FrontEnd, "VersionedPreferences" -> True]; 
       b = False]]}, {}]], Alignment -> Center], 
 Initialization :> 
  If[! Last@Last@Options[$FrontEnd, "VersionedPreferences"], b = True,
    b = False]]

The key points are:

Upvotes: 3

Views: 175

Answers (2)

Dr. belisarius
Dr. belisarius

Reputation: 61016

Perhaps

PreemptProtect[SetOptions[$FrontEnd, "VersionedPreferences" -> False]; b = True]; 

Column[{"Item 1", "Item 2", Dynamic[
   If[Last@Last@Options[$FrontEnd, "VersionedPreferences"]===False && b == True, 
    Button["Here!", SetOptions[$FrontEnd, "VersionedPreferences"->True];b=False], 
   "Done"]]}]

Edit

Answering your comment. Please try the following. Encompassing the Column[ ] with Dynamic[ ] allows resizing it: 

PreemptProtect[SetOptions[$FrontEnd, "VersionedPreferences" -> False]; b = True]; 
Dynamic[
  Column[{
   "Item 1", 
   "Item 2",
   If[Last@Last@Options[$FrontEnd, "VersionedPreferences"] === False && b == True, 
    Button["Press me!", SetOptions[$FrontEnd, "VersionedPreferences" -> True]; b=False], 
    Sequence @@ {}]}]]

Upvotes: 6

mikuszefski
mikuszefski

Reputation: 4043

Hmm, dunno if I get it right, but maybe this:

x = True;

Dynamic[Column[{Button["reset", x = True], If[x, Button["Press me", x = False]]}] ]

Upvotes: 4

Related Questions