NSTableView/NSCell/NSScrollView stuff

[Matt Rice]

plethora of patches

NSTableView.misc.diff: 2 things in here, one of them
is probably something which we need to think
about/discuss
i'd split it up but it'd just cause conflicts...

a)
don't copy/destroy the cell, there is a remark that it
may not be needed in the source, and it causes
problems where you
trackMouse:inRect:ofView:untilMouseUp: of a copy of
the cell but NSTableView still draws with the
original, so the display and the cell state are out of
sync

b) currently there is no way to differentiate if the
NSCell should be sent 
trackMouse:inRect:ofView:untilMouseUp  or 
editWithFrame:inView:editor:delegate:event: 

not really a problem for NSTextField and friends
because it can just blindly send the correct thing,
but for "cell collection" classes a way to tell seems
neccesary

this is currently causing some issues with
NSTextFieldCells in NSTableView 
this for example:
http://savannah.gnu.org/bugs/index.php?func=detailitem&item_id=9463
there was a discussion about using
-sendsActionOnEndEditing: where I was wrong..
that does something else useful in it's own right..
http://storrow.org/cocoa-javadoc/com/apple/cocoa/application/NSCell.html#sendsActionOnEndEditing()

so changing the _action_mask of NSTextFieldCell seems
to have the effect of disabling sending the action on
unselectable text field's but i'm not so sure if it
should send the action then anyways.


NSTableView-cornerheader.diff and
NSTableView-cornerheader4.diff
do basically the same thing though the 4 one adds
ivars so it isn't binary compatible, and is a bit
different (should work better with non-NSTableView
classes that use corner/header views) iirc at least 4
apps subclass NSScrollView so this may be an issue.

i have a test program for the above stuff, it's just
ugly so i haven't attached it let me know if i
should..

NSTableView-validateDrop.diff:
bugfix where the return value of
tableView:validateDrop:proposedRow:proposedDropOperation:
is being ignored and for -draggingUpdated: it returns
the draggingSourceOperationMask


                
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NSTableView.misc.diff
Description: NSTableView.misc.diff

NSTableView-cornerheader.diff
Description: NSTableView-cornerheader.diff

NSTableView-cornerheader4.diff
Description: NSTableView-cornerheader4.diff

NSTableView-validateDrop.diff
Description: NSTableView-validateDrop.diff