为什么可编辑的可可文本字段单元格不绘制阴影？

Question

So, it works fine if I disable editing for the textfield/textfieldcell... through code or interface builder.

(notice the slight shadow)

But once I make it editable ([cell setEditable:YES]) the shadow completely disappears:

I've tried drawing a shadow two ways: One, setting NSBackgroundStyleRaised , and two, overriding - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView to manually create a shadow. Both styles/ways of drawing a shadow stop working once the cell is made editable. (To make it clear, the end result should be inset-looking, editable text. The pictures above only served as a demonstration.)

Can someone tell me why? And how I can get around this issue?

Answer 1

I think I figured out why, at least partially -

Because I was using - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView to set the shadow, and because when editing, the field editor is also doing the drawing (and it's not going through the above mentioned method) the shadow doesn't apply to it.

Confirmation on this might be nice, but for now I'm going to assume this is why the shadow isn't drawing.