Re: Doubleclicking NSTextView

[Andreas Höschler]

Hi all,

> on MacOSX one can select an empty line by double-clicking on it. You 
> can also select the contents (select all) of an NSTextField by 
> doubleclicking on the space behind the (short) string.
>
> -- doubleclick here - -
>                                   \/
> -------------------------------------------
> dog                                                  |
> -------------------------------------------
>
> Under GNUstep you have to hit the string otherwise it does not work. 
> Selecting empty lines by doubleclicking is not possible at all under 
> GNUstep. I will look into this later today, but since this is so 
> annoying I suppose somebody has already tried to take care of this 
> (and failed)!? :-(  Is this a greater problem with the current 
> NSTextView architecture?

I fixed this issue as follows, making NSTextView behave close to what 
we have on a Mac. :-)

- (void)mouseDown:(NSEvent *)theEvent
{
...
  if (!_layoutManager)
    return;

  /* Otherwise, NSWindow has already made us first responder (if
     possible) */

  startPoint = [self convertPoint:[theEvent locationInWindow] 
fromView:nil];
  startIndex = [self characterIndexForPoint:startPoint];

+  if (startIndex != (unsigned)-1 && startIndex > 0)
+     {
+     NSString *string = [self string];
+     if ([string characterAtIndex:startIndex - 1] == '\n') 
startIndex--;
+     }

  if (startIndex == (unsigned int)-1)
    {
     return;
    }
...
}


- (NSRange)selectionRangeForProposedRange:(NSRange)proposedCharRange 
granularity:(NSSelectionGranularity)gr
{
...
  if (proposedCharRange.location >= length)
    {
      proposedCharRange.location = length;
      proposedCharRange.length = 0;

+      switch (gr)
+        {
+        case NSSelectByCharacter:
+            break;
+        default:
+            return [string lineRangeForRange:proposedCharRange];
+            break;
+        }

      return proposedCharRange;
    }
...
)

Regards,

  Andreas