In an application I'm working on, I read in plain text files containing data to
be analyzed. This uses a slightly-modified version of MyDocument.m that is
produced as a result of starting a project with the template for NSDocument
architecture. The modification that I made was to add a method named
updateView, which is called near the end of windowControllerDidLoadNib and
loadDataRepresentation: ofType:
My reason for adding this method is to make the spacing of tabs something that
works well for the sort of data files being analyzed, which presume tabs are
used to separate values being analyzed. Here's the code:
- (void)updateView {
DBOut(@"updateView was called from MyDocument");
[[self textView] setString:[self string]];
// code to set tab stops, as suggested by PGM
int cnt;
int numStops = 200;
int tabInterval = 80;
NSTextTab *tabStop;
NSMutableDictionary *attrs = [[NSMutableDictionary alloc] init];
//attributes for attributed string of TextView
NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStyle alloc]
init];
[paraStyle setTabStops:[NSArray array]]; // clear all tab stops
// now put in tab stops at desired intervals
for (cnt = 0; cnt < numStops; cnt++) {
tabStop = [[NSTextTab alloc] initWithType:NSLeftTabStopType
location:tabInterval*(cnt+1)];
[paraStyle addTabStop:tabStop];
[tabStop release];
}
[attrs setObject:paraStyle forKey:NSParagraphStyleAttributeName];
[paraStyle release];
[[textView textStorage] addAttributes:attrs range:NSMakeRange(0,
[[[textView textStorage] string] length])];
[attrs release];
}
When my application opens a text file, the insertion point is blinking
immediately after the last character on the last line. If I then hit the tab
key, the insertion point moves over the correct distance. However, if I hit
the return key when the file is first opened, the insertion point moves to the
start of the next line; if I then hit the tab key the insertion point moves it
over too few spaces (presumably the default distance rather than what I tried
to set in the above code).
What am I missing?
Boyd_______________________________________________
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