On 2014 Sep 15, at 12:47, Ken Thomases <k...@codeweavers.com> wrote:
> Check the places where you can control how the outline view sizes the columns. It seems that I only set column widths during -awakeFromNib. Definitely not upon expanding an item. > In particular, from the docs for -[NSOutlineViewDelegate > outlineView:sizeToFitWidthOfColumn:]: > > "By default, NSOutlineView iterates every row in the table, accesses a cell > via preparedCellAtColumn:row:, and requests the cellSize to find the > appropriate largest width to use. > > For accurate results and performance, it is recommended that this method is > implemented when using large tables. By default, large tables use a monte > carlo simulation instead of iterating every row.” Those two paragraphs don’t make much sense to me, Ken. For starters, when does NSOutlineView “iterate every row”? I mean, this is a delegate method. There is no default implementation. Further up, it says that this method is "Invoked to allow the delegate to provide custom sizing behavior when a column’s resize divider is double clicked.” I was never even aware of this “feature" :)) and had not implemented this method. Just to test, I implemented it to return CGFloat value 50.0. And, by golly, now when I double-click a column divider, in the table header, the preceding column resizes to 50 points. I’m still thinking, but I can’t reckon any connection between this and -outlineView:child:ofItem: being sent proactively instead of lazily. Implementing it did not stop the “let’s get every row” craziness with -outlineView:child:ofItem:. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
