B_TOGGLE_BEHAVIOR
if (message->FindInt32("behavior") == BButton::B_TOGGLE_BEHAVIOR) {
bool toggleBehavior = fBehavior == B_TOGGLE_BEHAVIOR;
if (fBehavior == B_TOGGLE_BEHAVIOR) {
if (fBehavior == B_TOGGLE_BEHAVIOR)
if (fBehavior != B_TOGGLE_BEHAVIOR)
SetBehavior(B_TOGGLE_BEHAVIOR);