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<p>Perfect! Thanks, Marcel! :-)</p>
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<p>Best,</p>
<p>Christoph</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> Squeak-dev <squeak-dev-bounces@lists.squeakfoundation.org> im Auftrag von Taeumel, Marcel<br>
<b>Gesendet:</b> Freitag, 3. April 2020 18:59:44<br>
<b>An:</b> John Pfersich via Squeak-dev<br>
<b>Betreff:</b> Re: [squeak-dev] Morphic equivalent of 'display: none'?</font>
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Hi!
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<div>Yes, there is:</div>
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<div>aMorph</div>
<div> disableLayout: true;</div>
<div> visible: false.</div>
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<div>Best,</div>
<div>Marcel</div>
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<p style="color: #AAAAAA; margin-top: 10px;">Am 03.04.2020 17:48:29 schrieb Stéphane Rollandin <lecteur@zogotounga.net>:</p>
<div style="font-family:Arial,Helvetica,sans-serif">> #show/#hide/#visible: reserve space for the hidden morph. However, there
<br>
> are other scenarios where you do not want to reserve space. (A simple <br>
> example would be a list that should only appear iff it has items.)<br>
<br>
You could have such a "removed morph" temporarily #become: a collapsed <br>
representation (like a flat invisible morph for a list item), and then <br>
swap it back when you need it. I have used that pattern; #become: is fast.<br>
<br>
> <br>
> In JS, you can use 'display: none' instead of 'visibility: hidden' to <br>
> give the space back to the element's remaining siblings.<br>
> <br>
> But in Morphic, is there currently any better option than #delete (and <br>
> #addMorph:) later?<br>
> <br>
> <br>
> (IMO, delete'n'add is not always the best pattern to do this. You <br>
> need to remember the index and owner of the relevant morph for adding it <br>
> later.)<br>
> <br>
> <br>
> Provided that I did not overlook any existing features, would you <br>
> consider this a useful extension for Morphic?<br>
<br>
No. I think this should be implemented either via specific mophs or via <br>
specific layout (probably yet to be invented).<br>
<br>
> <br>
> I was thinking of a property (#skipLayout, if you do not have any better <br>
> idea) and a convenience method (#nonSkippedSubmorphs) that <br>
> rejects suppressed submorphs. TableLayout would need to use this <br>
> selector instead of regular #submorphs.<br>
> <br>
> Or would this break too many existing things that rely on #submorphs?<br>
<br>
Oh, yes, please do not add any logic to #submorphs. It is a plain array <br>
and a lot of things rely on this. You can implement a wrapper Morph with <br>
all that logic, instead.<br>
<br>
> <br>
> <br>
> Another approach would be a selector in the TableLayoutProperties <br>
> to have all submorphs skipped that are hidden via classical #visible. <br>
> But this would be less powerful as you couldn't combine both kinds of <br>
> hiding in the same morph. But maybe this would be even better in terms <br>
> of avoiding complexity?<br>
<br>
Not a good idea IMO to use a property tag to represent another property. <br>
#visible should just be about visibility.<br>
<br>
Best,<br>
<br>
Stef<br>
<br>
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