[mac] Type selector control

2 files changed, 212 insertions, 0 deletions

diff --git a/Xamarin.PropertyEditing.Mac/Controls/TypeSelectorControl.cs b/Xamarin.PropertyEditing.Mac/Controls/TypeSelectorControl.cs
new file mode 100644
index 0000000..747ca64
--- /dev/null
+++ b/Xamarin.PropertyEditing.Mac/Controls/TypeSelectorControl.cs
@@ -0,0 +1,211 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Threading;
+using AppKit;
+using Foundation;
+using Xamarin.PropertyEditing.ViewModels;
+
+namespace Xamarin.PropertyEditing.Mac
+{
+	internal class TypeSelectorControl
+		: NotifyingView<TypeSelectorViewModel>
+	{
+		public TypeSelectorControl()
+		{
+			this.checkbox = NSButton.CreateCheckbox (Properties.Resources.ShowAllAssemblies, OnCheckedChanged);
+			this.checkbox.TranslatesAutoresizingMaskIntoConstraints = false;
+			AddSubview (this.checkbox);
+
+			var scroll = new NSScrollView {
+				TranslatesAutoresizingMaskIntoConstraints = false
+			};
+
+			var d = new TypeSelectorDelegate ();
+			this.outlineView = new NSOutlineView  {
+				Delegate = d,
+				AutoresizingMask = NSViewResizingMask.WidthSizable,
+				HeaderView = null,
+				Action = new ObjCRuntime.Selector ("onActivatedItem"),
+				Target = this
+			};
+			var col = new NSTableColumn ();
+			this.outlineView.AddColumn (col);
+			this.outlineView.OutlineTableColumn = col;
+			scroll.DocumentView = this.outlineView;
+
+			AddSubview (scroll);
+
+			this.filter = new NSTextField {
+				TranslatesAutoresizingMaskIntoConstraints = false,
+				PlaceholderString = "Filter"
+			};
+			this.filter.Changed += OnFilterChanged;
+
+			AddSubview (this.filter);
+
+			AddConstraints (new[] {
+				NSLayoutConstraint.Create (this.filter, NSLayoutAttribute.Top, NSLayoutRelation.Equal, this, NSLayoutAttribute.Top, 1, 10),
+				NSLayoutConstraint.Create (this.filter, NSLayoutAttribute.Width, NSLayoutRelation.Equal, this, NSLayoutAttribute.Width, 1, -20),
+				NSLayoutConstraint.Create (this.filter, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, this, NSLayoutAttribute.CenterX, 1, 0),
+
+				NSLayoutConstraint.Create (scroll, NSLayoutAttribute.Top, NSLayoutRelation.Equal, this.filter, NSLayoutAttribute.Bottom, 1, 8),
+				NSLayoutConstraint.Create (scroll, NSLayoutAttribute.Width, NSLayoutRelation.Equal, this.filter, NSLayoutAttribute.Width, 1, 0),
+				NSLayoutConstraint.Create (scroll, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, this, NSLayoutAttribute.CenterX, 1, 0),
+				NSLayoutConstraint.Create (scroll, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, this.checkbox, NSLayoutAttribute.Top, 1, -8),
+
+				NSLayoutConstraint.Create (this.checkbox, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, this, NSLayoutAttribute.Bottom, 1, -10),
+				NSLayoutConstraint.Create (this.checkbox, NSLayoutAttribute.Left, NSLayoutRelation.Equal, scroll, NSLayoutAttribute.Left, 1, 0)
+			});
+		}
+
+		public override void OnViewModelChanged (TypeSelectorViewModel oldModel)
+		{
+			base.OnViewModelChanged (oldModel);
+
+			this.outlineView.DataSource = new TypeSelectorDataSource (ViewModel);
+			OnPropertyChanged (ViewModel, new PropertyChangedEventArgs (null));
+		}
+
+		public override void OnPropertyChanged (object sender, PropertyChangedEventArgs e)
+		{
+			base.OnPropertyChanged (sender, e);
+
+			switch (e.PropertyName) {
+			case nameof (TypeSelectorViewModel.Types):
+				Reload ();
+				break;
+			case nameof (TypeSelectorViewModel.FilterText):
+			default:
+				UpdateFilter ();
+				break;
+			}
+		}
+
+		public override void KeyDown (NSEvent theEvent)
+		{
+			if (theEvent.KeyCode == 76 || theEvent.KeyCode == 36) {
+				if (this.outlineView.SelectedRow >= 0) {
+					var facade = (NSObjectFacade)this.outlineView.ItemAtRow (this.outlineView.SelectedRow);
+					if (facade.Target is ITypeInfo)
+						OnActivatedItem ();
+				} else {
+					OnActivatedItem ();
+				}
+			}
+
+			base.KeyDown (theEvent);
+		}
+
+		private readonly NSOutlineView outlineView;
+		private readonly NSTextField filter;
+		private readonly NSButton checkbox;
+
+		private void Reload()
+		{
+			this.outlineView.ReloadData ();
+
+			if (!String.IsNullOrWhiteSpace (ViewModel?.FilterText)) {
+				for (int i = 0; i < this.outlineView.RowCount; i++) {
+					this.outlineView.ExpandItem (this.outlineView.ItemAtRow (i));
+				}
+			}
+		}
+
+		[Export ("onActivatedItem")]
+		private void OnActivatedItem()
+		{
+			if (this.outlineView.SelectedRow >= 0) {
+				var facade = (NSObjectFacade)this.outlineView.ItemAtRow (this.outlineView.SelectedRow);
+				ViewModel.SelectedType = facade.Target as ITypeInfo;
+			} else {
+				ViewModel.SelectedType = null;
+			}
+		}
+
+		private void OnFilterChanged (object sender, EventArgs e)
+		{
+			if (ViewModel == null)
+				return;
+
+			ViewModel.FilterText = this.filter.StringValue;
+			Reload ();
+		}
+
+		private void UpdateFilter()
+		{
+			this.filter.StringValue = ViewModel?.FilterText ?? String.Empty;
+		}
+
+		private void OnCheckedChanged ()
+		{
+			ViewModel.ShowAllAssemblies = this.checkbox.State == NSCellStateValue.On;
+			Reload ();
+		}
+
+		private class TypeSelectorDataSource
+			: NSOutlineViewDataSource
+		{
+			public TypeSelectorDataSource (TypeSelectorViewModel viewModel)
+			{
+				this.viewModel = viewModel;
+			}
+
+			public override nint GetChildrenCount (NSOutlineView outlineView, NSObject item)
+			{
+				if (item == null) {
+					return this.viewModel.Types?.Count ?? 0;
+				} else if (((NSObjectFacade)item).Target is KeyValuePair<string, SimpleCollectionView> kvp) {
+					return kvp.Value.Count;
+				}
+
+				return base.GetChildrenCount (outlineView, item);
+			}
+
+			public override NSObject GetChild (NSOutlineView outlineView, nint childIndex, NSObject item)
+			{
+				if (item == null) {
+					return new NSObjectFacade (this.viewModel.Types[(int)childIndex]);
+				} else if (((NSObjectFacade)item).Target is KeyValuePair<string, SimpleCollectionView> kvp) {
+					return new NSObjectFacade (kvp.Value[(int)childIndex]);
+				}
+
+				return base.GetChild (outlineView, childIndex, item);
+			}
+
+			public override bool ItemExpandable (NSOutlineView outlineView, NSObject item)
+			{
+				return !(((NSObjectFacade)item).Target is ITypeInfo);
+			}
+
+			private TypeSelectorViewModel viewModel;
+		}
+
+		private class TypeSelectorDelegate
+			: NSOutlineViewDelegate
+		{
+
+			public override NSView GetView (NSOutlineView outlineView, NSTableColumn tableColumn, NSObject item)
+			{
+				var label = (UnfocusableTextField)outlineView.MakeView (LabelId, outlineView);
+				if (label == null) {
+					label = new UnfocusableTextField {
+						Identifier = LabelId
+					};
+				}
+
+				string text = String.Empty;
+				var facade = (NSObjectFacade)item;
+				if (facade.Target is KeyValuePair<string, SimpleCollectionView> kvp)
+					text = kvp.Key;
+				else if (facade.Target is ITypeInfo type)
+					text = type.Name;
+
+				label.StringValue = text;
+				return label;
+			}
+
+			private const string LabelId = "label";
+		}
+	}
+}
diff --git a/Xamarin.PropertyEditing.Mac/Xamarin.PropertyEditing.Mac.csproj b/Xamarin.PropertyEditing.Mac/Xamarin.PropertyEditing.Mac.csproj
index 1e4aa71..ce10228 100644
--- a/Xamarin.PropertyEditing.Mac/Xamarin.PropertyEditing.Mac.csproj
+++ b/Xamarin.PropertyEditing.Mac/Xamarin.PropertyEditing.Mac.csproj
@@ -145,6 +145,7 @@
     <Compile Include="Controls\Custom\DynamicFillBox.cs" />

     <Compile Include="Controls\Custom\TabButton.cs" />

     <Compile Include="Controls\Custom\FocusableComboBox.cs" />

+    <Compile Include="Controls\TypeSelectorControl.cs" />

   </ItemGroup>

   <ItemGroup>

     <Folder Include="Controls\" />