May 2002
Intermediate to advanced
646 pages
18h 57m
English
Content preview from Building Cocoa Applications: A Step by Step GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The NSScrollView and NSTextView Classes
In Chapter 10 we introduced the NSScrollView and NSTextView classes when we dragged an NSScrollView object from IB’s Cocoa-Data palette into a MathPaper window. At the time, we said that the NSScrollView object “contains” an NSTextView object. Perhaps a better way of putting it is to say that an NSTextView is “embedded” inside each NSScrollView. The NSScrollView object in IB’s Palettes window actually contains the following nine objects:
- NSScrollView
Displays the scroller and does the actual scrolling
- NSTextView
Displays the text
- NSClipView
Helps arrange the communication between the NSScrollView and the NSTextView
- Vertical scroller
Controls up-down scrolling and shows where you are in the document
- Horizontal scroller
Controls left-right scrolling and shows where you are in the document
- NSTextStorage object
Holds the data that the NSTextView displays
- NSTextContainer object
Defines the region where the text will be displayed
- NSLayoutManager object
Controls the layout of the NSTextStorage object’s information within the NSTextView
- NSSimpleHorizontalTypesetter
Does the typesetting
You can control whether each scroller is displayed by sending the setHasVerticalScroller: or setHasHorizontalScroller: messages (with the arguments YES or NO) to the NSScrollView. By default, the NSScrollView that you drag off IB’s Cocoa-Data palette displays the vertical scroller, but not the horizontal one.
NSTextView objects are most frequently used with NSScrollView ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.