Makes FocusableComboBox a ProxyResponder class

1 files changed, 18 insertions, 0 deletions

diff --git a/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusableComboBox.cs b/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusableComboBox.cs
index 577ce4b..d75dde2 100644
--- a/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusableComboBox.cs
+++ b/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusableComboBox.cs
@@ -5,6 +5,24 @@ namespace Xamarin.PropertyEditing.Mac
 {
 	internal class FocusableComboBox : NSComboBox
 	{
+		public ProxyRowResponder ResponderProxy { get; set; }
+
+		public override void KeyDown (NSEvent theEvent)
+		{
+			switch (theEvent.KeyCode) {
+			case (int)NSKey.Tab:
+				if (ResponderProxy != null) {
+					if (theEvent.ModifierFlags.HasFlag(NSEventModifierMask.ShiftKeyMask)) {
+						ResponderProxy.PreviousResponder ();
+					} else {
+						ResponderProxy.NextResponder ();
+					}
+				}
+				return;
+			}
+			base.KeyDown (theEvent);
+		}
+
 		public override bool BecomeFirstResponder ()
 		{
 			var willBecomeFirstResponder = base.BecomeFirstResponder ();