Xamarin.PropertyEditing.Mac/Controls/BasePointEditorControl.cs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79

using System;
using System.Collections;
using System.Diagnostics;
using AppKit;
using Xamarin.PropertyEditing.ViewModels;

namespace Xamarin.PropertyEditing.Mac
{
	internal abstract class BasePointEditorControl<T> : PropertyEditorControl
		where T : struct
	{
		internal UnfocusableTextField XLabel { get; set; }
		internal NSTextField XEditor { get; set; }
		internal UnfocusableTextField YLabel { get; set; }
		internal NSTextField YEditor { get; set; }

		public override NSView FirstKeyView => XEditor;
		public override NSView LastKeyView => YEditor;

		internal new PropertyViewModel<T> ViewModel
		{
			get { return (PropertyViewModel<T>)base.ViewModel; }
			set { base.ViewModel = value; }
		}

		public BasePointEditorControl ()
		{
			XLabel = new UnfocusableTextField ();

			XEditor = new NSTextField ();
			XEditor.BackgroundColor = NSColor.Clear;
			XEditor.StringValue = string.Empty;
			XEditor.Activated += OnInputUpdated;
			XEditor.EditingEnded += OnInputUpdated;

			YLabel = new UnfocusableTextField ();

			YEditor = new NSTextField ();
			YEditor.BackgroundColor = NSColor.Clear;
			YEditor.StringValue = string.Empty;
			YEditor.Activated += OnInputUpdated;
			YEditor.EditingEnded += OnInputUpdated;

			AddSubview (XLabel);
			AddSubview (XEditor);
			AddSubview (YLabel);
			AddSubview (YEditor);
		}

		protected override void HandleErrorsChanged (object sender, System.ComponentModel.DataErrorsChangedEventArgs e)
		{
			UpdateErrorsDisplayed (ViewModel.GetErrors (ViewModel.Property.Name));
		}

		protected override void UpdateErrorsDisplayed (IEnumerable errors)
		{
			if (ViewModel.HasErrors) {
				XEditor.BackgroundColor = NSColor.Red;
				YEditor.BackgroundColor = NSColor.Red;
				Debug.WriteLine ("Your input triggered 1 or more errors:");
				foreach (var error in errors) {
					Debug.WriteLine (error.ToString () + "\n");
				}
			} else {
				XEditor.BackgroundColor = NSColor.Clear;
				YEditor.BackgroundColor = NSColor.Clear;
				SetEnabled ();
			}
		}

		protected override void SetEnabled ()
		{
			XEditor.Editable = ViewModel.Property.CanWrite;
			YEditor.Editable = ViewModel.Property.CanWrite;
		}

		protected abstract void OnInputUpdated (object sender, EventArgs e);
	}
}