_buttonState = Switch
    .Case("locked", new ValueTrigger(displayItem, "locked", Id))
    .Case("selected", new ValueTrigger(displayItem, "selected", Id))
    .Case("await", new ValueTrigger(displayItem.enabledTimeout, "isRunning", Id))
    .Case("notExists", new ValueTrigger(displayItem, "amount", IsEq(0)))
    .Case("exists", new ValueTrigger(displayItem, "amount", IsGt(0)))
    .handle(this, function(state: String): void {
        _view.lockIcon.visible = "locked" == state;
        _view.animatedImage.visible = "locked" != state
        _view.clipBinding.timeoutGroup.visible = "await" == state;
        _view.buyButton.visible = "notExists" == state;
        _view.selectedButton.visible = "selected" == state ||  "exists" == state
        _view.amount.visible = "exists" == state;
    }
);