Xamarin.PropertyEditing.Mac/Controls/Custom/ResourceOutlineViewDelegate.cs


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using System;
using AppKit;
using CoreGraphics;
using Foundation;
using Xamarin.PropertyEditing.Drawing;
using Xamarin.PropertyEditing.ViewModels;

namespace Xamarin.PropertyEditing.Mac
{
	internal class ResourceOutlineViewDelegate
		: NSOutlineViewDelegate
	{
		public ResourceOutlineViewDelegate (IHostResourceProvider hostResource)
		{
			if (hostResource == null)
				throw new ArgumentNullException (nameof (hostResource));

			this.hostResources = hostResource;
		}

		public override NSView GetView (NSOutlineView outlineView, NSTableColumn tableColumn, NSObject item)
		{
			var facade = item as NSObjectFacade;
			var resource = facade?.Target as Resource;
			switch (tableColumn.Identifier) {
				case ResourceOutlineView.ResourcePreviewColId:
					var cbv = (CommonBrushView)outlineView.MakeView (resourceIdentifier, this);
					if (cbv == null) {
						cbv = new CommonBrushView (this.hostResources) {
							Identifier = resourceIdentifier,
							Frame = new CGRect (0, 0, 30, 18),
							AutoresizingMask = NSViewResizingMask.WidthSizable
						};
					}

					var commonBrush = BrushPropertyViewModel.GetCommonBrushForResource (resource);
					if (commonBrush != null)
						cbv.Brush = commonBrush;

					return cbv;

				case ResourceOutlineView.ResourceNameColId:
				default:
					var utf = (UnfocusableTextField)outlineView.MakeView (labelIdentifier, this);
					if (utf == null) {
						utf = new UnfocusableTextField {
							Identifier = labelIdentifier,
						};
					}
					utf.StringValue = resource.Name;
					return utf;
			}
		}

		private const string labelIdentifier = "label";
		private const string resourceIdentifier = "resource";

		private readonly IHostResourceProvider hostResources;
	}
}