TextViewImeActionBinding

TextViewImeActionBinding.axml

            <TextView
                local:MvxBind="Text PasswordConfirm; ImeAction RegisterCommand"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Password"
                android:inputType="textPassword"
                android:imeOptions="actionSend" />

TextViewImeActionBinding.cs

    /// <summary>
    /// Author: softlion (softlion.com)
    /// </summary>
    /// <remarks>
    /// Thanks to: Stuart Lodge
    /// </remarks>
    public class TextViewImeActionBinding : MvxAndroidTargetBinding
    {
        private ICommand command;
        protected TextView TextView { get { return Target as TextView; } }

        public static void Register(IMvxTargetBindingFactoryRegistry registry)
        {
            registry.RegisterCustomBindingFactory<TextView>("ImeAction", view => new TextViewImeActionBinding(view));
        }

        public TextViewImeActionBinding(TextView view) : base(view)
        {
            if (view == null)
                Mvx.Trace(MvxTraceLevel.Error, "TextViewImeActionBinding : view is null");
            else
                view.EditorAction += ViewOnEditorAction;
        }

        private void ViewOnEditorAction(object sender, TextView.EditorActionEventArgs args)
        {
            if (args.Event != null)
            {
                if (args.Event.IsShiftPressed)
                {
                    // if shift key is down, then we want to insert the '\n' char in the TextView;
                    // if event action is keydown then wait for keyup before excecuting it
                    args.Handled = false;
                    return;
                }
            }

            args.Handled = true;
            //Required test, otherwise it fires twice (with hardware keyboard). With sw kb args.Event is null.
            if (command == null || (args.Event != null && args.Event.Action != KeyEventActions.Down))
                return;

            command.Execute(null);
        }

        //Never called with OneWay binding mode
        //public override void SubscribeToEvents()

        public override Type TargetType {  get { return typeof(ICommand); } }

        //Should be OneWayToSource, but SetValueImpl is never called in this case
        public override MvxBindingMode DefaultMode { get { return MvxBindingMode.OneWay; } }

        protected override void SetValueImpl(object target, object value)
        {
            command = value as ICommand;
            if (command == null)
                Mvx.Error("viewmodel target is not an ICommand: {0}", value!=null ? value.GetType() : null);
        }

        protected override void Dispose(bool isDisposing)
        {
            if (isDisposing)
            {
                var view = TextView;
                if (view != null)
                {
                    view.EditorAction -= ViewOnEditorAction;
                }
            }
            base.Dispose(isDisposing);
        }
    }