[Mac] Initial Origin Control implementation

Author: CartBlanche

Xamarin.PropertyEditing.Mac/Controls/BaseRectangleEditorControl.cs

@@ -4,6 +4,7 @@
 using System.Drawing;
 using AppKit;
 using CoreGraphics;
+using Xamarin.PropertyEditing.Drawing;
 using Xamarin.PropertyEditing.ViewModels;
 
 namespace Xamarin.PropertyEditing.Mac
@@ -19,9 +20,15 @@ internal abstract class BaseRectangleEditorControl<T> : PropertyEditorControl<Pr
 		protected UnfocusableTextField HeightLabel { get; set; }
 		protected NumericSpinEditor<T> HeightEditor { get; set; }
 
-		public override NSView FirstKeyView => XEditor;
+		public override NSView FirstKeyView => this.firstKeyView;
 		public override NSView LastKeyView => HeightEditor.DecrementButton;
 
+		public NSLayoutConstraint LeftXEditorEdgeConstraint { get; }
+		private OriginControl originView;
+		private NSLayoutConstraint originViewConstraint;
+		private CommonOrigin lastOrigin = CommonOrigin.TopLeft;
+		private NSView firstKeyView;
+
 		protected BaseRectangleEditorControl (IHostResourceProvider hostResources)
 			: base (hostResources)
 		{
@@ -35,7 +42,7 @@ protected BaseRectangleEditorControl (IHostResourceProvider hostResources)
 			};
 			XEditor.ValueChanged += OnInputUpdated;
 
-			YLabel =  new UnfocusableTextField {
+			YLabel = new UnfocusableTextField {
 				Font = NSFont.FromFontName (DefaultFontName, DefaultDescriptionLabelFontSize),
 				TranslatesAutoresizingMaskIntoConstraints = false,
 			};
@@ -55,7 +62,7 @@ protected BaseRectangleEditorControl (IHostResourceProvider hostResources)
 			};
 			WidthEditor.ValueChanged += OnInputUpdated;
 
-			HeightLabel =  new UnfocusableTextField {
+			HeightLabel = new UnfocusableTextField {
 				Font = NSFont.FromFontName (DefaultFontName, DefaultDescriptionLabelFontSize),
 				TranslatesAutoresizingMaskIntoConstraints = false,
 			};
@@ -74,9 +81,11 @@ protected BaseRectangleEditorControl (IHostResourceProvider hostResources)
 			AddSubview (HeightLabel);
 			AddSubview (HeightEditor);
 
-			this.AddConstraints (new[] {
+			LeftXEditorEdgeConstraint = NSLayoutConstraint.Create (XEditor, NSLayoutAttribute.Left, NSLayoutRelation.Equal, this, NSLayoutAttribute.Left, 1f, 0);
+
+			AddConstraints (new[] {
 				NSLayoutConstraint.Create (XEditor, NSLayoutAttribute.Top, NSLayoutRelation.Equal, this,  NSLayoutAttribute.Top, 1f, 3f),
-				NSLayoutConstraint.Create (XEditor, NSLayoutAttribute.Left, NSLayoutRelation.Equal, this,  NSLayoutAttribute.Left, 1f, 0f),
+				LeftXEditorEdgeConstraint,
 				NSLayoutConstraint.Create (XEditor, NSLayoutAttribute.Right, NSLayoutRelation.Equal, YEditor,  NSLayoutAttribute.Left, 1f, -10f),
 				NSLayoutConstraint.Create (XEditor, NSLayoutAttribute.Height, NSLayoutRelation.Equal, 1f, 18),
 
@@ -92,7 +101,7 @@ protected BaseRectangleEditorControl (IHostResourceProvider hostResources)
 				NSLayoutConstraint.Create (YLabel, NSLayoutAttribute.Height, NSLayoutRelation.Equal, 1f, 18),
 
 				NSLayoutConstraint.Create (WidthEditor, NSLayoutAttribute.Top, NSLayoutRelation.Equal, this,  NSLayoutAttribute.Top, 1f, 33f),
-				NSLayoutConstraint.Create (WidthEditor, NSLayoutAttribute.Left, NSLayoutRelation.Equal, this,  NSLayoutAttribute.Left, 1f, 0f),
+				NSLayoutConstraint.Create (WidthEditor, NSLayoutAttribute.Left, NSLayoutRelation.Equal, XEditor,  NSLayoutAttribute.Left, 1f, 0f),
 				NSLayoutConstraint.Create (WidthEditor, NSLayoutAttribute.Right, NSLayoutRelation.Equal, HeightEditor,  NSLayoutAttribute.Left, 1f, -10f),
 				NSLayoutConstraint.Create (WidthEditor, NSLayoutAttribute.Height, NSLayoutRelation.Equal, 1f, 18),
 
@@ -114,12 +123,14 @@ protected BaseRectangleEditorControl (IHostResourceProvider hostResources)
 				NSLayoutConstraint.Create (HeightLabel, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, HeightEditor.Subviews[0], NSLayoutAttribute.CenterX, 1f, 0),
 			});
 
+			this.firstKeyView = XEditor;
+
 			AppearanceChanged ();
 		}
 
 		protected virtual void OnInputUpdated (object sender, EventArgs e)
 		{
-			ViewModel.Value = (T)Activator.CreateInstance (typeof(T), XEditor.Value, YEditor.Value, WidthEditor.Value, HeightEditor.Value);
+			ViewModel.Value = (T)Activator.CreateInstance (typeof (T), XEditor.Value, YEditor.Value, WidthEditor.Value, HeightEditor.Value);
 		}
 
 		protected override void SetEnabled ()
@@ -128,6 +139,10 @@ protected override void SetEnabled ()
 			YEditor.Enabled = ViewModel.Property.CanWrite;
 			WidthEditor.Enabled = ViewModel.Property.CanWrite;
 			HeightEditor.Enabled = ViewModel.Property.CanWrite;
+
+			if (this.originView != null) {
+				this.originView.Enabled = ViewModel.Property.CanWrite;
+			}
 		}
 
 		protected override void UpdateAccessibilityValues ()
@@ -154,5 +169,54 @@ protected override void AppearanceChanged ()
 			WidthLabel.TextColor = HostResources.GetNamedColor (NamedResources.DescriptionLabelColor);
 			HeightLabel.TextColor = HostResources.GetNamedColor (NamedResources.DescriptionLabelColor);
 		}
+
+		protected override void OnViewModelChanged (PropertyViewModel oldModel)
+		{
+			base.OnViewModelChanged (oldModel);
+
+			if (ViewModel == null)
+				return;
+
+			LeftXEditorEdgeConstraint.Active = true;
+
+			if (ViewModel is RectanglePropertyViewModel rpvm && rpvm.HasOrigin) {
+				LeftXEditorEdgeConstraint.Active = false;
+				if (this.originView == null) {
+					this.originView = new OriginControl (HostResources) {
+						AccessibilityEnabled = ViewModel.Property.CanWrite,
+						AccessibilityTitle = string.Format (Properties.Resources.AccessibilityOriginEditor, ViewModel.Property.Name),
+						Enabled = rpvm.Property.CanWrite,
+						//TODO Origin = rpvm.Origin,
+						TranslatesAutoresizingMaskIntoConstraints = false,
+					};
+
+					// TODO this.lastOrigin = rpvm.Origin;
+
+					this.originView.OriginChanged += (s, e) => {
+						this.lastOrigin = this.originView.Origin;
+						/* TODO MetricsPropertyEntryHelper.HandleOriginChanged (this, this.originView.Origin, v => {
+							if (XEditor.Value != v)
+								XEditor.Value = v;
+						}, v => {
+							if (YEditor.Value != v)
+								YEditor.Value = v;
+						});*/
+					};
+
+					AddSubview (this.originView);
+
+					this.originViewConstraint = NSLayoutConstraint.Create (this.originView, NSLayoutAttribute.Right, NSLayoutRelation.Equal, XEditor, NSLayoutAttribute.Left, 1, -4);
+
+					AddConstraints (new[] {
+						NSLayoutConstraint.Create (this.originView, NSLayoutAttribute.Top, NSLayoutRelation.Equal, XEditor,  NSLayoutAttribute.Top, 1f, 0),
+						NSLayoutConstraint.Create (this.originView, NSLayoutAttribute.Left, NSLayoutRelation.Equal, this,  NSLayoutAttribute.Left, 1f, 0),
+						this.originViewConstraint,
+						NSLayoutConstraint.Create (this.originView, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, this, NSLayoutAttribute.Bottom, 1, -2f),
+					});
+
+					this.firstKeyView = this.originView;
+				}
+			}
+		}
 	}
 }