Merge branch 'FixMenuItem' of https://github.com/l1pton17/MaterialDesignInXamlToolkit into l1pton17-FixMenuItem

Author: ButchersBoy

MainDemo.Wpf/MenusAndToolBars.xaml

@@ -18,7 +18,7 @@
                     </MenuItem.Icon>
                 </MenuItem>
                 <MenuItem Header="Save As.." />
-                <MenuItem Header="Exit">
+                <MenuItem Header="Exit" InputGestureText="Ctrl+E">
                     <MenuItem.Icon>
                         <Viewbox Width="16" Height="16">
                             <Canvas Width="24" Height="24">
@@ -30,9 +30,9 @@
                 <Separator />
                 <MenuItem Header="Excellent" IsCheckable="True" IsChecked="True" />
                 <MenuItem Header="Rubbish" IsCheckable="True" />
-                <MenuItem Header="Dig Deeper">
-                    <MenuItem Header="Enlightenment?" />
-                    <MenuItem Header="Disappointment" />
+                <MenuItem Header="Dig Deeper" InputGestureText="Ctrl+D">
+                    <MenuItem Header="Enlightenment?" IsCheckable="True" />
+                    <MenuItem Header="Disappointment" IsCheckable="True" />
                 </MenuItem>
             </MenuItem>
             <MenuItem Header="_Edit">

MaterialDesignThemes.Wpf/Converters/TextFieldHintVisibilityConverter.cs

@@ -7,9 +7,12 @@ namespace MaterialDesignThemes.Wpf.Converters
 {
 	public class TextFieldHintVisibilityConverter : IValueConverter
 	{
+        public Visibility IsEmptyValue { get; set; } = Visibility.Visible;
+        public Visibility IsNotEmptyValue { get; set; } = Visibility.Hidden;
+    
 		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
 		{
-			return string.IsNullOrEmpty((value ?? "").ToString()) ? Visibility.Visible : Visibility.Hidden;
+			return string.IsNullOrEmpty((value ?? "").ToString()) ? IsEmptyValue : IsNotEmptyValue;
 		}
 
 		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)