[mac] Generic numeric editor

1 files changed, 102 insertions, 0 deletions

diff --git a/Xamarin.PropertyEditing.Mac/Controls/NumericEditorControl.cs b/Xamarin.PropertyEditing.Mac/Controls/NumericEditorControl.cs
new file mode 100644
index 0000000..5f326b5
--- /dev/null
+++ b/Xamarin.PropertyEditing.Mac/Controls/NumericEditorControl.cs
@@ -0,0 +1,102 @@
+using System;
+using System.Collections;
+using AppKit;
+using Foundation;
+using Xamarin.PropertyEditing.Mac.Resources;
+using Xamarin.PropertyEditing.ViewModels;
+
+namespace Xamarin.PropertyEditing.Mac
+{
+	internal class NumericEditorControl<T>
+		: PropertyEditorControl
+		where T : struct
+	{
+		public NumericEditorControl ()
+		{
+			base.TranslatesAutoresizingMaskIntoConstraints = false;
+
+			NumericEditor = new NumericSpinEditor ();
+			NumericEditor.ValueChanged += OnValueChanged;
+
+			TypeCode code = Type.GetTypeCode (typeof (T));
+			switch (code) {
+				case TypeCode.Double:
+				case TypeCode.Single:
+				case TypeCode.Decimal:
+					NumberStyle = NSNumberFormatterStyle.Decimal;
+					Formatter.UsesGroupingSeparator = false;
+					Formatter.MaximumFractionDigits = 15;
+					break;
+				default:
+					NumberStyle = NSNumberFormatterStyle.None;
+					break;
+			}
+
+			AddSubview (NumericEditor);
+
+			this.DoConstraints ( new[] {
+				NumericEditor.ConstraintTo (this, (n, c) => n.Top == c.Top + 1),
+				NumericEditor.ConstraintTo (this, (n, c) => n.Left == c.Left + 4),
+				NumericEditor.ConstraintTo (this, (n, c) => n.Width == c.Width - 33),
+			});
+		}
+
+		protected NumericSpinEditor NumericEditor { get; set; }
+
+		protected NSNumberFormatter Formatter {
+			get {
+				return NumericEditor.Formatter;
+			}
+			set {
+				NumericEditor.Formatter = value;
+			}
+		}
+
+		public override NSView FirstKeyView => NumericEditor;
+		public override NSView LastKeyView => NumericEditor;
+
+		protected NSNumberFormatterStyle NumberStyle {
+			get { 
+				return NumericEditor.NumberStyle; }
+			set {
+				NumericEditor.NumberStyle = value;
+			}
+		}
+
+		protected override void UpdateErrorsDisplayed (IEnumerable errors)
+		{
+			if (ViewModel.HasErrors) {
+				SetErrors (errors);
+			} else {
+				SetErrors (null);
+				SetEnabled ();
+			}
+		}
+
+		protected override void HandleErrorsChanged (object sender, System.ComponentModel.DataErrorsChangedEventArgs e)
+		{
+			UpdateErrorsDisplayed (ViewModel.GetErrors (ViewModel.Property.Name));
+		}
+
+		protected override void SetEnabled ()
+		{
+			NumericEditor.Editable = ViewModel.Property.CanWrite;
+		}
+
+		protected virtual void OnValueChanged (object sender, EventArgs e)
+		{
+			((PropertyViewModel<T>)ViewModel).Value = (T)Convert.ChangeType (NumericEditor.Value, typeof(T));
+		}
+
+		protected override void UpdateValue()
+		{
+			NumericEditor.Value = (double)Convert.ChangeType (((PropertyViewModel<T>)ViewModel).Value, typeof(double));
+		}
+
+		protected override void UpdateAccessibilityValues ()
+		{
+			NumericEditor.AccessibilityEnabled = NumericEditor.Enabled;
+			NumericEditor.AccessibilityTitle = string.Format (LocalizationResources.AccessibilityNumeric, ViewModel.Property.Name);
+		}
+	}
+}