An easier algorithm to do this on Leopard:
- (CGFloat)mySizeToFitWidthOfColumn:(NSInteger)column row:
(NSInteger)row {
NSCell *cell = [self preparedCellAtColumn:column row:row];
return [cell cellSize].width + 1;
}
..
// for each table column:
for (NSInteger i = 0; i < [self numberOfRows]; i++) {
NSInteger cellWidth = [self
mySizeToFitWidthOfColumn:column row:i];
// Optional: constrain it to the column min/max of the
column, or the table itself, if there is no column (which...is strange
for autoresize, but oh well)
sizeToFitWidth = MAX(sizeToFitWidth, cellWidth);
}
...set the width on the table column
-corbin
On May 10, 2008, at 6:44 PM, Peter Hudson wrote:
sizeToFit simply sets the width of a column to the width of the
header cell - and I suspect that you
want to set the width of each column to suit the widest cell of
data in that column.
Here is the heuristic to achieve that:
( Assuming that you have not changed the font for any of the
cells ... )
[A]
get a table column - get the dataCell for the column - send
it the font message.
Assume we assign it to a variable tableFont
[B]
Create an attributes dictionary with tableFont like this ...
NSMutableDictionary *attributes = [NSMutableDictionary dictionary];
[attributes setObject:tableFont forKey:NSFontAttributeName];
[C]
Then, by using the table data source, you use this attributes
dictionary to check
the written size of all the data - column by column.
i.e. take each column and iterating over the data for each row in
that column,
hence deducing the max width of the column....
NSSize writtenSize = [dataString sizeWithAttributes:attributes];
[D]
Having collected the widths of all the columns, iterate over the
columns
and set their widths - then you may need to send the table view a
tile message
to sort itself out.
Don't forget to set your max width on your columns to something
sensible.
( P G J H )
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