Re: TreeView - set border on individual cells

[Emmanuele Bassi <ebassi gmail com>]

On Sat, 6 Apr 2019 at 20:15, <cecashon aol com> wrote:


> The second cairo_t is used so that the rectangle can be lined up to the
> cell. If I use the cairo_t in the "draw" callback then the rectangle
> doesn't line up.

You're still using:

 1. the wrong window to draw on
 2. deprecated API
 3. a slow rendering path

In general, though drawing *on top* of widgets is not encouraged; you're
either going to break things inside GTK, or your own code will break
because GTK may change something in how widgets are drawn.

If you want to change how a cell is rendered, you can subclass the cell
renderer into your own class and override its own draw function; this way,
you're guaranteed you'll be rendering at the right position.

Ciao,
 Emmanuele.

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