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Auto-expanding a MultilineTextEdit

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Subject: Auto-expanding a MultilineTextEdit
From: joebet...@gmail.com (Joe Betz)
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by: Joe Betz - Tue, 22 Feb 2022 21:51 UTC

How do you configure a MultilineTextEdit to increase in height whenever text wraps to a new line or a newline gets added (i.e., by pressing enter)?

Context: The MultilineTextEdit is inside a ContainerView using ProportionalLayout with arrangement set to 0. I tried enabling `usePreferredExtent`, recalculating the extent with every key typed, and then updating it using `preferredExtent:`, but the edit field remains the same size.

I have a strong feeling that it's an issue with the layouts but I can't figure out a better way to arrange things to get the behavior I want.

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Subject: Re: Auto-expanding a MultilineTextEdit
From: joebet...@gmail.com (Joe Betz)
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by: Joe Betz - Sat, 26 Feb 2022 07:13 UTC

<sigh> There was an extra ContainerView that was screwing things up, inbetween the input field and the view where the layout was correctly defined. Got rid of that and `preferredExtent:` is now working as expected.

onKeyTyped: aKeyEvent on: aTextInput
| newExtent |
newExtent := aTextInput calculateExtent: (LayoutContext forContainer: self).
(newExtent y < 250) ifTrue: [ aTextInput preferredExtent: newExtent ]

Statistics means never having to say you're certain.

devel / comp.lang.smalltalk.dolphin / Auto-expanding a MultilineTextEdit

Subject	Author
Auto-expanding a MultilineTextEdit	Joe Betz
Re: Auto-expanding a MultilineTextEdit	Joe Betz