On Apr 9, 2015, at 11:24 AM, Steve Mills <[email protected]> wrote:
> I can't figure out a combination of constraints and hugging/compression
> values that will cause an NSTextField used as a multiline wrapping label to
> grow vertically when the window is resized horizontally.
> I tried setting the label's vertical content hugging to 1 and the vertical
> content compression resistance to 1000, which seem like the right values to
> me. Does its intrinsic size never grow to fully contain the wrapped text?
Constraints never affect a view's intrinsic content size, at least not without
some help from you. The content hugging and compression resistance priorities
take the intrinsic content size as input, more or less. Or, thought of another
way, they act based on the intrinsic content size.
As you've found, by default, a text field will compute an intrinsic content
size as though it were laid out in one long line.
Since 10.8, though, NSTextField has had a preferredMaxLayoutWidth property. If
you set that to a non-zero value, it will compute its intrinsic content size
based on the rect it would need if it were wrapped at that width.
That's still static, though. By itself, it doesn't help as your window changes
width.
In a parent view, you could override the -layout method with something like
this to adjust it dynamically:
- (void) layout
{
textField.preferredMaxLayoutWidth = 0;
[super layout]
textField.preferredMaxLayoutWidth = NSWidth([textField
alignmentRectForFrame:textField.frame]);
[super layout];
}
Regards,
Ken
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