[mac] TypeEditorControl

Author: Eric Maupin

Xamarin.PropertyEditing.Mac/Controls/TypeEditorControl.cs

@@ -0,0 +1,151 @@
+using System;
+using System.Collections;
+using System.ComponentModel;
+using System.Threading.Tasks;
+using AppKit;
+using Foundation;
+using Xamarin.PropertyEditing.ViewModels;
+
+namespace Xamarin.PropertyEditing.Mac
+{
+	internal class TypeEditorControl
+		: PropertyEditorControl<TypePropertyViewModel>
+	{
+		public TypeEditorControl (IHostResourceProvider hostResources)
+			: base (hostResources)
+		{
+			this.typeLabel = new UnfocusableTextField {
+				TranslatesAutoresizingMaskIntoConstraints = false
+			};
+			AddSubview (this.typeLabel);
+
+			this.selectType = new NSButton {
+				Title = Properties.Resources.Select,
+				TranslatesAutoresizingMaskIntoConstraints = false,
+				BezelStyle = NSBezelStyle.Rounded
+			};
+			this.selectType.Activated += OnSelectPressed;
+			AddSubview (this.selectType);
+
+			this.buttonConstraint = NSLayoutConstraint.Create (this.selectType, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, this.typeLabel, NSLayoutAttribute.Trailing, 1f, 12);
+
+			AddConstraints (new[] {
+				NSLayoutConstraint.Create (this.typeLabel, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, this, NSLayoutAttribute.Leading, 1f, 0f),
+				NSLayoutConstraint.Create (this.typeLabel, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, this, NSLayoutAttribute.CenterY, 1f, 0f),
+				NSLayoutConstraint.Create (this.typeLabel, NSLayoutAttribute.Height, NSLayoutRelation.Equal, this, NSLayoutAttribute.Height, 1, 0),
+				this.buttonConstraint,
+				NSLayoutConstraint.Create (this.selectType, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, this, NSLayoutAttribute.Leading, 1, 0).WithPriority (NSLayoutPriority.DefaultLow),
+				NSLayoutConstraint.Create (this.selectType, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, this, NSLayoutAttribute.CenterY, 1f, 0f),
+				NSLayoutConstraint.Create (this.selectType, NSLayoutAttribute.Width, NSLayoutRelation.GreaterThanOrEqual, 1f, 70f),
+			});
+		}
+
+		public override NSView FirstKeyView => this.selectType;
+
+		public override NSView LastKeyView => this.selectType;
+
+		protected override void UpdateValue ()
+		{
+		}
+
+		protected override void UpdateErrorsDisplayed (IEnumerable errors)
+		{
+		}
+
+		protected override void HandleErrorsChanged (object sender, DataErrorsChangedEventArgs e)
+		{
+		}
+
+		protected override void SetEnabled ()
+		{
+			this.selectType.Enabled = ViewModel.Property.CanWrite;
+		}
+
+		protected override void UpdateAccessibilityValues ()
+		{
+			this.selectType.AccessibilityTitle = String.Format (Properties.Resources.SelectTypeForProperty, ViewModel.Property.Name);
+		}
+
+		protected override void OnViewModelChanged (PropertyViewModel oldModel)
+		{
+			base.OnViewModelChanged (oldModel);
+
+			if (oldModel is TypePropertyViewModel tvm) {
+				tvm.TypeRequested -= OnTypeRequested;
+			}
+
+			if (ViewModel != null) {
+				ViewModel.TypeRequested += OnTypeRequested;
+
+				OnPropertyChanged (ViewModel, new PropertyChangedEventArgs (null));
+			}
+		}
+
+		protected override void OnPropertyChanged (object sender, PropertyChangedEventArgs e)
+		{
+			switch (e.PropertyName) {
+			case nameof (TypePropertyViewModel.Value):
+				UpdateTypeLabel ();
+				break;
+			case null:
+			case "":
+				UpdateTypeLabel ();
+				UpdateCreateInstanceCommand ();
+				break;
+			}
+
+			base.OnPropertyChanged (sender, e);
+		}
+
+		private readonly UnfocusableTextField typeLabel;
+		private readonly NSButton selectType;
+		private readonly NSLayoutConstraint buttonConstraint;
+
+		private void OnCreateInstanceExecutableChanged (object sender, EventArgs e)
+		{
+			UpdateCreateInstanceCommand ();
+		}
+
+		private void OnTypeRequested (object sender, TypeRequestedEventArgs e)
+		{
+			e.SelectedType = e.RequestAt (HostResources, this.selectType, ViewModel.AssignableTypes);
+		}
+
+		private void UpdateTypeLabel ()
+		{
+			if (ViewModel.Value == null) {
+				this.typeLabel.StringValue = String.Empty;
+				this.buttonConstraint.Active = false;
+			} else {
+				this.typeLabel.StringValue = $"({ViewModel.Value.Name})";
+				this.buttonConstraint.Active = true;
+			}
+		}
+
+		private void UpdateCreateInstanceCommand ()
+		{
+			this.selectType.Enabled = ViewModel.SelectTypeCommand.CanExecute (null);
+		}
+
+		private void OnSelectPressed (object sender, EventArgs e)
+		{
+			ViewModel.SelectTypeCommand.Execute (null);
+		}
+
+		private class PopoverDelegate<T>
+			: NSPopoverDelegate
+		{
+			public PopoverDelegate (TaskCompletionSource<T> tcs)
+			{
+				this.tcs = tcs;
+			}
+
+			public override void WillClose (NSNotification notification)
+			{
+				this.tcs.TrySetCanceled ();
+			}
+
+			private readonly TaskCompletionSource<T> tcs;
+		}
+	}
+}

Xamarin.PropertyEditing.Mac/PropertyEditorSelector.cs

@@ -55,6 +55,7 @@ public virtual IEditorView GetEditor (IHostResourceProvider hostResources, Edito
 			{typeof (ThicknessPropertyViewModel), typeof (CommonThicknessEditorControl) },
 			{typeof (PropertyGroupViewModel), typeof (GroupEditorControl)},
 			{typeof (ObjectPropertyViewModel), typeof (ObjectEditorControl)},
+			{typeof (TypePropertyViewModel), typeof (TypeEditorControl)},
 
 		};
 	}

Xamarin.PropertyEditing.Mac/Xamarin.PropertyEditing.Mac.csproj

@@ -150,6 +150,7 @@
     <Compile Include="Controls\TypeSelectorWindow.cs" />
     <Compile Include="Controls\Custom\PropertyTextField.cs" />
     <Compile Include="Controls\ControlExtensions.cs" />
+    <Compile Include="Controls\TypeEditorControl.cs" />
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Controls\" />