Makes FocusablePopupButton a ProxyResponder class

1 files changed, 18 insertions, 0 deletions

diff --git a/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusablePopupButton.cs b/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusablePopupButton.cs
index 988dc2b..7cdfcfc 100644
--- a/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusablePopupButton.cs
+++ b/Xamarin.PropertyEditing.Mac/Controls/Custom/FocusablePopupButton.cs
@@ -8,11 +8,29 @@ namespace Xamarin.PropertyEditing.Mac
 	{
 		public override bool CanBecomeKeyView { get { return Enabled; } }
 
+		public ProxyRowResponder ResponderProxy { get; set; }
+
 		public FocusablePopUpButton ()
 		{
 			Cell.LineBreakMode = NSLineBreakMode.TruncatingMiddle;
 		}
 
+		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 ();