drawing artifacts...

[Matt Rice]

sorry this email has a ton of attachments...

while i'm fairly sure the attached patch isn't correct
it does get rid of any remaining artifacts caused by
cursor movement in NSTableView 

but i have yet to see anywhere the code i modify
actually does anything, since by default table view
NSTextFieldCells don't draw their backround

(in between foo3 and 8 nothing seemed to happen... so
i didn't attach those)

you can see the progression of these artifacts,
and the before/after of my most recent patch committed
to back in the new/old.png's...

http://svn.gna.org/viewcvs/gnustep/libs/back/trunk/Source/x11/XGServerWindow.m?rev=24287&r1=24246&r2=24287

this was using back-art...
anyhow it'd be great to get rid of these artifacts
completely, but it seems better than it was...

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Index: Source/NSTableView.m
===================================================================
--- Source/NSTableView.m        (revision 24288)
+++ Source/NSTableView.m        (working copy)
@@ -3271,13 +3271,13 @@
   // We really want the correct background color!
   if ([_editedCell respondsToSelector: @selector(setBackgroundColor:)])
     {
-      [(NSTextFieldCell *)_editedCell setBackgroundColor: _backgroundColor];
+      [(NSTextFieldCell *)_editedCell setBackgroundColor: [NSColor 
textBackgroundColor]];
     }
   else
     {
-      [t setBackgroundColor: _backgroundColor];
+      [t setBackgroundColor: [NSColor textBackgroundColor]];
     }
-  
+   
   // But of course the delegate can mess it up if it wants
   [self _willDisplayCell: _editedCell
        forTableColumn: tb
@@ -3299,7 +3299,8 @@
     }
 
   _textObject = [_editedCell setUpFieldEditorAttributes: t];
-
+  [_textObject setDrawsBackground:YES];
+  
   drawingRect = [self frameOfCellAtColumn: columnIndex  row: rowIndex];
   if (flag)
     {