Hi I needed to do this for my pdf builder implementation:
Using the NSLayoutManager directly gives the best level of control. https://github.com/ThesaurusSoftware/PDFPageBuilder/blob/master/PDFPageBuilder/TSPageTextItem.m#L95 NSRect boundingRect = self.containerRect; // if no rect height defined then use default BOOL containerHasExplicitHeight = YES; if (boundingRect.size.height == 0) { boundingRect.size.height = self.pageHeight - self.containerRect.origin.y ; containerHasExplicitHeight = NO; } // allocate text container and layout manager NSTextContainer *textContainer = [[NSTextContainer alloc] initWithContainerSize:boundingRect.size]; textContainer.lineFragmentPadding = 0; // defaults to non zero NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init]; [layoutManager addTextContainer:textContainer]; layoutManager.usesFontLeading = YES; // allocate text storage and assign layout manager self.textStorage = [[NSTextStorage alloc] initWithAttributedString:self.attributedString]; [self.textStorage addLayoutManager:layoutManager]; // do glyph layout // NOTE: cannot quite get glyphRangeForBoundingRect configured correctly here //self.glyphRange = [layoutManager glyphRangeForBoundingRect:boundingRect inTextContainer:textContainer]; self.glyphRange = [layoutManager glyphRangeForTextContainer:textContainer]; // get rect used for actual glyph layout self.usedTextRect = [layoutManager usedRectForTextContainer:textContainer]; Jonathan > On 3 Mar 2017, at 13:28, Igor Ranieri <i...@elland.me> wrote: > > Hi Peter. > > > Have you tried also passing `usesLineFragmentOrigin` as one of the options? > It works here. > > Here’s some code I’m currently using to achieve a similar effect: > > let sizeLimit = CGSize(width: 80.0, height: CGFloat.greatestFiniteMagnitude) > let size = attrString.boundingRect(with: sizeLimit, options: > [.usesLineFragmentOrigin, .usesFontLeading], context: nil).integral.size > > And it returns the expected size. > > > best, > elland > > >> On 3. Mar 2017, at 14:18, Peter Hudson <peter.hud...@me.com> wrote: >> >> Hi All >> >> I have done the following to try to determine the rect required to draw an >> attributed string( and thus the height of a row in a table view - on MacOS >> ) >> >> I am trying to constrain my column width to 60 - and let the possible height >> of the row be a max of 1000. >> >> >> let aString = anAttributedString >> let constrainedSize = NSMakeSize(60.0, 1000.0) >> let optns = NSStringDrawingOptions.usesFontLeading >> let cntxt = NSStringDrawingContext() >> cntxt.minimumScaleFactor = 1.0 >> >> let aRect = aString?.boundingRect(with: constrainedSize, options: optns, >> context: cntxt) >> >> >> >> After the call to boundingRect, aRect has its width set to 60 and its >> height set to 18. >> >> This is not however correct for the contents of the attributed string - I >> would expect the height to be at least 200 or so with the width constrained >> to 60. >> >> Any help gratefully received. >> >> Peter >> >> >> >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/cocoa-dev/igor%40elland.me >> >> This email sent to i...@elland.me > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/lists%40mugginsoft.com > > This email sent to li...@mugginsoft.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
