NSCell with Embedded NSView
NSCell with Embedded NSView
- Subject: NSCell with Embedded NSView
- From: Mike Rossetti <email@hidden>
- Date: Thu, 6 Apr 2006 09:41:18 -0600
Folks,
I'd appreciate any hints and suggestions about how to properly draw
an NSView within an NSCell in an NSTableView. I _almost_ have it
working. The problem I am struggling with is that only the cell in
the very last row is being drawn properly. The crux of the matter is
that I am trying to use a 'floating' view for rendering the contents
of each cell in the single column in the table. (I need to use this
view because the data being shown is complex and does not lend itself
to composition in columns: it's a two-line presentation where both
lines do not line up column-wise.)
The floating view approach saves having to have, potentially, tens of
thousands of subviews, one for each row. Unfortunately, trying to
draw the view in the cell's drawWithFrame:
- (void) drawWithFrame: (NSRect) cellFrame inView: (NSView*) controlView
{
if ([cellView superview] != controlView)
[controlView addSubview: cellView];
[cellView setFrame: cellFrame];
[cellView display];
}
results in recursion:
#0 0x0021d124 in -[MySpecialView display] at MySpecialView.mm:40
#1 0x0021cf10 in -[MySpecialCell drawWithFrame:inView:] at
MySpecialCell.mm:68
#2 0x9372d5ec in -[NSTableView _drawContentsAtRow:column:clipRect:]
#3 0x9372ce78 in -[NSTableView drawRow:clipRect:]
#4 0x9372cc34 in -[NSTableView drawRowIndexes:clipRect:]
#5 0x9372c2bc in -[NSTableView drawRect:]
#6 0x936c0e78 in -[NSView _drawRect:clip:]
#7 0x936c0438 in -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:]
#8 0x936bfa00 in -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisible
RectForView:topView:]
#9 0x936b9674 in -[NSView
_displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
#10 0x936ae968 in -[NSView displayIfNeeded]
-- Here we go again
#11 0x0021d17c in -[MySpecialView display] at MySpecialView.mm:43
#12 0x0021cf10 in -[MySpecialCell drawWithFrame:inView:] at
MySpecialCell.mm:68
#13 0x9372d5ec in -[NSTableView _drawContentsAtRow:column:clipRect:]
#14 0x9372ce78 in -[NSTableView drawRow:clipRect:]
#15 0x9372cc34 in -[NSTableView drawRowIndexes:clipRect:]
#16 0x9372c2bc in -[NSTableView drawRect:]
#17 0x936c0e78 in -[NSView _drawRect:clip:]
#18 0x936c0438 in -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:]
#19 0x936bfa00 in -[NSView
_recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisible
RectForView:topView:]
#20 0x936b9674 in -[NSView
_displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
#21 0x936ae968 in -[NSView displayIfNeeded]
-- Here we go again
#22 0x0021d17c in -[MySpecialView display] at MySpecialView.mm:43
#23 0x0021cf10 in -[MySpecialCell drawWithFrame:inView:] at
MySpecialCell.mm:68
#24 0x9372d5ec in -[NSTableView _drawContentsAtRow:column:clipRect:]
#25 0x9372ce78 in -[NSTableView drawRow:clipRect:]
#26 0x9372cc34 in -[NSTableView drawRowIndexes:clipRect:]
#27 0x9372c2bc in -[NSTableView drawRect:]
#28 0x936c0e78 in -[NSView _drawRect:clip:]
#29 0x936c0438 in -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:]
What is the recommended way to draw a floating NSView in response to
a NSCell being redrawn?
Thanks,
Mike
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