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using System;
using AppKit;
using CoreAnimation;
using CoreGraphics;
namespace Xamarin.PropertyEditing.Mac
{
internal class HistoryLayer : ColorEditorLayer
{
private const float BorderRadius = 3;
public HistoryLayer (IHostResourceProvider hostResources)
{
if (hostResources == null)
throw new ArgumentNullException (nameof (hostResources));
this.hostResources = hostResources;
clip.AddSublayer (previous);
clip.AddSublayer (current);
AddSublayer (clip);
AddSublayer (lastClip);
lastClip.AddSublayer (last);
}
public HistoryLayer (IntPtr handle) : base (handle)
{
}
private readonly IHostResourceProvider hostResources;
private readonly CALayer previous = new UnanimatedLayer ();
private readonly CALayer current = new UnanimatedLayer ();
private readonly CALayer last = new UnanimatedLayer ();
private readonly CALayer lastClip = new UnanimatedLayer {
BorderWidth = 1,
CornerRadius = BorderRadius,
BorderColor = new CGColor (.5f, .5f, .5f, .5f),
MasksToBounds = true
};
private readonly CALayer clip = new UnanimatedLayer {
BorderWidth = 1,
CornerRadius = BorderRadius,
BorderColor = new CGColor (.5f, .5f, .5f, .5f),
MasksToBounds = true,
};
public override void LayoutSublayers ()
{
base.LayoutSublayers ();
this.lastClip.Frame = new CGRect (
Bounds.Right - Bounds.Height,
0,
Bounds.Height,
Bounds.Height);
this.clip.Frame = new CGRect (
0,
0,
Bounds.Width - Bounds.Height - 3,
Bounds.Height);
NSColor cc0 = this.hostResources.GetNamedColor (NamedResources.Checkerboard0Color);
NSColor cc1 = this.hostResources.GetNamedColor (NamedResources.Checkerboard1Color);
this.clip.Contents = DrawingExtensions.GenerateCheckerboard (this.clip.Bounds, cc0, cc1);
this.lastClip.Contents = DrawingExtensions.GenerateCheckerboard (this.last.Bounds, cc0, cc1);
this.last.Frame = this.lastClip.Bounds;
var width = clip.Frame.Width / 2;
previous.Frame = new CGRect (0, 0, width, this.clip.Frame.Height);
current.Frame = new CGRect (width, 0, width, this.clip.Frame.Height);
}
public override void UpdateFromModel (EditorInteraction interaction)
{
LayoutIfNeeded ();
current.BackgroundColor = interaction.Color.ToCGColor ();
previous.BackgroundColor = interaction.ViewModel.InitialColor.ToCGColor ();
last.BackgroundColor = interaction.LastColor.ToCGColor ();
}
public override void UpdateFromLocation (EditorInteraction interaction, CGPoint location)
{
if (previous == HitTest (location))
interaction.Color = interaction.ViewModel.InitialColor;
}
public override void Commit (EditorInteraction interaction)
{
}
}
}
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