Dyalog Forums

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

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

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.

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

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.

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