Re: [gtk-list] How to handle double-click in CTree vs CList

[Allan Black <allan genia scotnet co uk>]

> I recently changed GTKYahoo to use a CTree instead of CList for the user
> listing. The problem is that now I have lost the ability to easily handle
> double-clicks.
> 
> Is there any quick and easy way to handle double-clicks in a ctree widget?

This is what I do ....

	gtk_signal_connect(GTK_OBJECT(ctree), "button_press_event",
				GTK_SIGNAL_FUNC(ctreebutton), data);

(as you would expect) when I create the ctree and ....

	gtk_ctree_node_set_row_data(GTK_CTREE(ctree), node, MYDATA);

when I add nodes to the tree and then ....

static gint ctreebutton(GtkWidget *w, GdkEventButton *bu, gpointer data)
{
	GtkCTreeNode *ctn;
	MYDATATYPE *item;
	gint row, column;

	if(bu->button == 1) {
		if(bu->type == GDK_2BUTTON_PRESS) {
			if(!gtk_clist_get_selection_info(GTK_CLIST(w),
					(gint)bu->x, (gint)bu->y,
					&row, &column))
				return FALSE;
fprintf(stderr, "double click at row %d\n", row);
			ctn = gtk_ctree_node_nth(GTK_CTREE(w), row);
			if(ctn == (GtkCTreeNode *)0) return FALSE;
			item = gtk_ctree_node_get_row_data(GTK_CTREE(w), ctn);

			if(item) MY_DOUBLE_CLICK_ACTION(item);

		}
	}

	return TRUE;
}

The important points are:

	gtk_clist_get_selection_info() tells you which row (and column, as
		it happens) corresponds to the coordinates you provide, in
		this case bu->x and bu->y - the coords of the double click.

	gtk_ctree_node_nth() gives you the ctree node corresponding to the
		clist row you supply.

	gtk_ctree_node_get_row_data() gives you back the user data you
		"attached" to the node when you inserted it into the ctree.

Allan