Reply for cocoa-dev:
Eric is right -- NSTableView won't do tracking in a cell if the shift
or alt keys are down. This is intentionally done, and has always been
the case.
A possible work around is what Eric is thinking about, which is to
override mouseDown and do his own trackMouse logic. Note that it
probably should call super first, in order to select the said row
before hand.
corbin
On Jan 15, 2009, at 2:10 PM, Eric Gorr wrote:
Thanks.
Any thoughts on whether or not it is even valid to call trackMouse
when obtaining a cell this (via preparedCellAtColumn) way?
On Jan 15, 2009, at 4:16 PM, Corbin Dunn wrote:
You want -frameOfCellAtRow:column:, not frameOfOutlineCellAtRow:row.
Do you get a call to this method, if implemented on your delegate/
datasource:
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldTrackCell:
(NSCell *)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)
item
corbin
On Jan 15, 2009, at 12:53 PM, Eric Gorr wrote:
Now, one idea I had was to override the mouseDown method of my
NSOutlineView to do something like:
- (void)mouseDown:(NSEvent *)theEvent
{
NSPoint eventLocation = [theEvent locationInWindow];
NSPoint localPoint = [self convertPoint:eventLocation
fromView:nil];
NSUInteger modifierFlags = [theEvent modifierFlags];
BOOL withShiftKey = ( modifierFlags & NSShiftKeyMask )
== NSShiftKeyMask;
BOOL withCmdKey = ( modifierFlags &
NSCommandKeyMask ) == NSCommandKeyMask;
NSInteger row = [self rowAtPoint:localPoint];
id item = [self itemAtRow:row];
if ( withShiftKey || withCmdKey ) {
MyCellClass *aCell = (MyCellClass *)[self
preparedCellAtColumn:0 row:row];
NSRect cellRect = [self frameOfOutlineCellAtRow:row];
[aCell trackMouse:theEvent inRect:cellRect ofView:self
untilMouseUp:YES];
}
[super mouseDown:theEvent];
}
Now, obviously, this isn't complete. For example, a lot more
checking needs to be done to make sure if I really want to call
trackMouse as I do have group rows and no special processing is
needed for them.
Unfortunately, this also doesn't work as I am uncertain how to get
the correct frame for the cell in the table. I am also not certain
if it would even be valid to call trackMouse when obtaining the
cell in this way.
If anyone has any thoughts or comments, I am interested.
On Jan 14, 2009, at 4:19 PM, Eric Gorr wrote:
I am using the pattern found in the excellent PhotoSearch sample
code (http://developer.apple.com/samplecode/PhotoSearch/
index.html) to do some custom mouse tracking in a custom
NSTextFieldCell.
Unfortunately, if I am holding down the Cmd or Shift key when I
click in a cell, the trackMouse method in my custom cell is not
called.
In my custom cell, I have multiple items. These items can
themselves be selected or not and I need to be able to handle the
standard selection behavior normally associated with the shift &
cmd keys.
Is there anything I can do about it?
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