rectArrayForCharacterRange and lineSpacing (was: text highlighting with CALayer and NSTextView)
On Aug 25, 2012, at 6:10 AM, Koen van der Drift koenvanderdr...@gmail.com wrote: NSRectArrayrectArray = [[self layoutManager] rectArrayForCharacterRange: aRange withinSelectedCharacterRange: selectedRange inTextContainer: [self textContainer] rectCount: rectCount]; For some reason, the height of the last rect in the NSRectArray is smaller than the other ones, and therefore the CALayer I draw behind the corresponding range of text looks wrong. My font size is 16, and the line spacing is set to 12. For most rects, the height returned is 31 (= 16 + 12 + 3), but for the last one, the height is 19 ( = 16 + 3). So it seems for the last rect, the linespace is ignored. I can test for that, and correct it, but I was wondering what is going on. And where does the '3' come from? - Koen. ___ 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
Re: rectArrayForCharacterRange and lineSpacing (was: text highlighting with CALayer and NSTextView)
On 04/09/2012, at 4:02 AM, Koen van der Drift koenvanderdr...@gmail.com wrote: For some reason, the height of the last rect in the NSRectArray is smaller than the other ones, and therefore the CALayer I draw behind the corresponding range of text looks wrong. My font size is 16, and the line spacing is set to 12. For most rects, the height returned is 31 (= 16 + 12 + 3), but for the last one, the height is 19 ( = 16 + 3). So it seems for the last rect, the linespace is ignored. I can test for that, and correct it, but I was wondering what is going on. And where does the '3' come from? I think that's correct. For the last line, there's no further line to space and so the bottom of the rectangle is at the bottom of the text. Or another way to think about it is that the line spacing is inserted above each line. --Graham ___ 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
Re: rectArrayForCharacterRange and lineSpacing (was: text highlighting with CALayer and NSTextView)
On Sep 3, 2012, at 11:02 AM, Koen van der Drift koenvanderdr...@gmail.com wrote: So it seems for the last rect, the linespace is ignored. I can test for that, and correct it, but I was wondering what is going on. And where does the '3' come from? There was a WWDC 2012 session on Core Text that Ned Holbrook gave that did a decent job explaining the different components that make up a line's typographic bounds. --Kyle Sluder ___ 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
Re: rectArrayForCharacterRange and lineSpacing (was: text highlighting with CALayer and NSTextView)
Thanks, I'll have a look at that. - Koen. On Sep 3, 2012, at 19:01, Kyle Sluder k...@ksluder.com wrote: On Sep 3, 2012, at 11:02 AM, Koen van der Drift koenvanderdr...@gmail.com wrote: So it seems for the last rect, the linespace is ignored. I can test for that, and correct it, but I was wondering what is going on. And where does the '3' come from? There was a WWDC 2012 session on Core Text that Ned Holbrook gave that did a decent job explaining the different components that make up a line's typographic bounds. --Kyle Sluder ___ 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
