Removed GTK+ spurious resize TODO and debug spiel; I can't notice much of a difference after ignoring extraneous resizes. The custom container will stay, however, as it does not demonstrate weird background drawing bugs with oxygen-gtk.

redo/container_unix.go

@@ -6,7 +6,6 @@ package ui
 
 import (
 	"unsafe"
-"fmt"
 )
 
 // #include "gtk_unix.h"
@@ -46,7 +45,6 @@ func (c *container) setParent(p *controlParent) {
 func containerResizing(data unsafe.Pointer, r *C.GtkAllocation) {
 	c := (*container)(data)
 	c.resize(int(r.x), int(r.y), int(r.width), int(r.height))
-fmt.Printf("%p new size %d x %d\n", c, r.width, r.height)
 }
 
 const (

redo/zz_test.go

@@ -114,7 +114,6 @@ func (tw *testwin) make(done chan struct{}) {
 	if *closeOnClick {
 		tw.b.SetText("Click to Close")
 	}
-	// GTK+ TODO: this is causing a resize event to happen afterward?!
 	tw.b.OnClicked(func() {
 		println("in OnClicked()")
 		if *closeOnClick {