Alternative way to write a property from enumeration

[PGilbert]

If you do the following you get a Window:

      ⎕USING ← 'System.Windows,WPF/PresentationFramework.dll'
      win ← ⎕NEW Window

if you want to change the visibility property of the window, one way of doing it is like this:

      win.Visibility ← win.Visibility.Hidden  ⍝ case 1

An alternative way is:

      win.(Visibility ← Visibility.Hidden)  ⍝ case 2

My question is: Is there another way even shorter that is possible ?

      win.Visibility.( ← .Hidden)  ⍝ Does not work but in this style

Thanks,

Pierre Gilbert

[norbertjurkiewicz84]

I'm sure you can assign the Visibility enumeration values directly. I'd probably stay away from this in case MS. ever decided to change them...

https://msdn.microsoft.com/en-us/librar ... 10%29.aspx

I've been using case #1 in all my WPF, WinForms and Excel OLE code. I find it to be the most readable.


Norbert

[PGilbert]

Could someone help me with this DFN function. If I do the following it does not work:

      win.Visibility←win.Visibility.Collapsed
      win.Visibility{⍺←⍺.⍎⍵}'Hidden'
      win.Visibility
Collapsed

which should be the same as the following that is working:

      win.Visibility←win.Visibility.⍎'Hidden'

Thanks in advance.

[MikeHughes]

Hi Pierre

the ⍺ is evaluated so you would have had something like
Win.visibility←Collapsed.⍎'Hidden'

I haven't tried it but I think it will involve
'Win.Visibility'{⍺,'.',⍺,'←',⍵}'Hidden'

Morten and I were talking this week about how nice
win.Visibility.←Hidden
to work like var+←1
would be BUT he went a little white and decided using . like this was a step a too far

[PGilbert]

Hello Mike, you are answering my question. I wanted to make sure that I was not missing a contraction like you said win.Visibility.←Hidden or win.Visibility.(←Hidden) that could have made sense in the dot notation of Dyalog somehow. Using a DFN is not simplifying the code, so I will forget about that also.

Thanks again.

[DanB|Dyalog]

One of the problems here is that the construct "{⍺←..." will never be executed because ⍺ already has a value.
Then only way I can see this work is by doing

Code: Select all

'win.Visibility'{⍎⍕⍺'←'⍺'.'⍵}'Hidden'