> On 4 Jun 2015, at 7:29 am, Frank D. Engel, Jr. <fde...@fjrhome.net> wrote: > > Now what I am hoping is the simpler one: > > I have a custom subclass of NSTextFieldCell which I am using to show an icon > in an NSBrowser. The icon image is being generated dynamically by a method > in my subclass and I want it to change more or less in "real time" as a bound > value changes. I have that almost working, but the one problem is that it > doesn't refresh when I need it to. > > Is there some way I can "force" a browser cell to redraw its image, short of > redrawing the entire browser or window? The text isn't changing, just the > icon, but I'd settle for redrawing the cell... > > I've tried a number of things to get this working and it seems I keep coming > up short.
NSBrowser normally uses NSBrowserCell to draw its content. That class has a -setImage: method which presumably knows how to mark the correct part of its host view as needing display. If you have to use a different cell class, then you’ll need to figure out how to do the same. The cell is part of a 1-column NSMatrix which has methods to return the rect occupied by a given row, so given that you can call -setNeedsDisplayInRect: on the matrix itself. Useful methods there are -[NSMatrix getRow:column:ofCell:] and -[NSMatrix cellFrameAtRow:column:]; hth, —Graham _______________________________________________ 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
