Enh: File selector should automatically limit itself in webapps

[SCdW]

In web apps:

• uigetdir is not supported so the selector icon should not appear
• uigetfile/uiputfile cannot have a predefined path.

I've been guarding this with:

tf = matlab.internal.environment.context.isWebAppServer;

[SCdW]

@rjackey - I'm getting a reproducible error when typing folder. File mode looks good.

>> fs = wt.FileSelector(IsWebApp=true)
fs = 
  [FileSelector](matlab:helpPopup('wt.FileSelector')) with properties:

     ValueChangedFcn: ''
               Value: ""
              Filter: [0×0 string]
            FullPath: ""
    ValueIsValidPath: 0
         ButtonLabel: ""
       SelectionType: file
       RootDirectory: ""
         ShowHistory: off
             History: [0×1 string]
    DefaultDirectory: ""
             Tooltip: ""
            Position: [100 100 400 25]

  Show [all properties](matlab:if exist('fs', 'var'), matlab.graphics.internal.getForDisplay('fs', fs, 'wt.FileSelector'), else, matlab.graphics.internal.getForDisplay('fs'), end)
>> fs.SelectionType = "folder"
fs = 
  [FileSelector](matlab:helpPopup('wt.FileSelector')) with properties:

     ValueChangedFcn: ''
               Value: ""
              Filter: [0×0 string]
            FullPath: ""
    ValueIsValidPath: 0
         ButtonLabel: ""
       SelectionType: folder
       RootDirectory: ""
         ShowHistory: off
             History: [0×1 string]
    DefaultDirectory: ""
             Tooltip: ""
            Position: [100 100 400 25]

  Show [all properties](matlab:if exist('fs', 'var'), matlab.graphics.internal.getForDisplay('fs', fs, 'wt.FileSelector'), else, matlab.graphics.internal.getForDisplay('fs'), end)

Type a valid folder

Unable to execute 'update' method.
Caused by:
    Matrix index is out of range for deletion. 

Unable to execute 'update' method.
Caused by:
    Matrix index is out of range for deletion.

[SCdW]

And Thanks for the quick enhancement @rjackey !

[rjackey]

Hi @SCdW, I pushed a fix for this one now and updated the related test to confirm the update() worked ok.

[SCdW]

@rjackey - looks good! Passing for my needs.