On Wed, Nov 18, 2009 at 12:22 AM, Ross Carter <rosscarter...@me.com> wrote:
> You mean when wrapping is turned off? You get that behavior for free. Try
> this:
>
> 1. Create a new project in XCode.
> 2. In the app delegate header, set up an IBOutlet to a NSTextView.
> 3. In interface Builder, add a NSTextView to the window and connect it to the
> IBOutlet.
> 4. Add this to the app delegate .m :
>
> - (void)awakeFromNib {
> [myTextView setHorizontallyResizable:YES];
> NSSize tcSize = [[myTextView textContainer] containerSize];
> tcSize.width = FLT_MAX;
> [[myTextView textContainer] setContainerSize:tcSize];
> [[myTextView textContainer] setWidthTracksTextView:NO];
> }
>
> Run the app. As you add text to the text view, you will see that the
> horizontal scroller adjusts as needed to accommodate the longest line. You
> don't have to do anything more.
Hi Ross,
This _almost_ works for me except the horizontal scroll bar doesn't
change as I add more text if I've added around 100 characters to the
line. If I write more words at the end of the line of text, the
horizontal scroll-bar's thumb doesn't update to indicate that there is
more "width" to scroll and I cannot scroll to the end of the line.
However, you have given me a great tip and I believe that I have
solved the problem. As a delegate of the NSTextView, I receive
textDidChangeNotifications and I update the width of the NSTextView to
accommodate the widest length of text via my selector
"updateScriptViewWidth" (below). This works exactly as I wanted to
and there is no flickering. Let me know if you see any problem with
the below.
Thanks again Ross!
Lyndsey Ferguson
- (CGFloat)longestLineOfText
{
CGFloat longestLineOfText = 0.0;
NSLayoutManager* layoutManager = [scriptTextView layoutManager];
NSRange lineRange;
NSUInteger glyphIndex = 0;
NSUInteger glyphCount = [layoutManager numberOfGlyphs];
while (glyphIndex < glyphCount) {
NSRect lineRect = [layoutManager
lineFragmentUsedRectForGlyphAtIndex:glyphIndex
effectiveRange:&lineRange
withoutAdditionalLayout:YES];
longestLineOfText = max(longestLineOfText, lineRect.size.width);
glyphIndex = NSMaxRange(lineRange);
}
return longestLineOfText;
}
// ----------------------------------------------------------------------------
- (void)updateScriptViewWidth
{
static CGFloat previousLongestLineOfText = 0.0;
CGFloat currentLongestLineOfText = [self longestLineOfText];
if (currentLongestLineOfText != previousLongestLineOfText) {
previousLongestLineOfText = currentLongestLineOfText;
NSTextContainer* container = [scriptTextView textContainer];
CGFloat padding = [container lineFragmentPadding];
NSRect frame = [scriptTextView frame];
frame.size.width = currentLongestLineOfText + padding * 2;
[scriptTextView setFrame:frame];
}
}
--
Lyndsey Ferguson
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