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using System;
using AppKit;
using CoreAnimation;
using CoreGraphics;
using ObjCRuntime;
namespace Xamarin.PropertyEditing.Mac
{
class ShadeLayer : ColorEditorLayer
{
private const float GripRadius = 4;
private const float BorderRadius = 3;
private readonly ChannelEditor saturationEditor = new HsbSaturationChannelEditor ();
private readonly ChannelEditor brightnessEditor = new HsbBrightnessChannelEditor ();
public ShadeLayer ()
{
AddSublayer (saturationLayer);
saturationLayer.AddSublayer (brightnessLayer);
AddSublayer (grip);
float innerRadius = GripRadius - 1;
grip.AddSublayer (new CALayer {
BorderWidth = 1,
BorderColor = new CGColor (0, 0, 0),
Frame = new CGRect (
GripRadius - innerRadius,
GripRadius - innerRadius,
innerRadius * 2,
innerRadius * 2),
CornerRadius = innerRadius
});
}
public ShadeLayer (NativeHandle handle) : base (handle)
{
}
private readonly CALayer grip = new UnanimatedLayer {
BorderColor = new CGColor (1, 1, 1),
BorderWidth = 1,
CornerRadius = GripRadius,
};
private readonly CAGradientLayer brightnessLayer = new UnanimatedGradientLayer {
Colors = new [] {
new CGColor (0f, 0f, 0f, 1f),
new CGColor (0f, 0f, 0f, 0f)
},
CornerRadius = BorderRadius,
};
private readonly CAGradientLayer saturationLayer = new UnanimatedGradientLayer {
Colors = new [] {
new CGColor (1f, 1f, 1f),
new CGColor (1f, .3f, 0f)
},
Actions = new Foundation.NSDictionary (),
BackgroundColor = NSColor.Black.CGColor,
BorderColor = new CGColor (.5f, .5f, .5f, .5f),
BorderWidth = 1,
CornerRadius = BorderRadius,
};
public override void LayoutSublayers ()
{
base.LayoutSublayers ();
this.saturationLayer.Frame = Bounds;
this.brightnessLayer.Frame = this.saturationLayer.Bounds;
this.saturationLayer.StartPoint = new CGPoint (0, .5);
this.saturationLayer.EndPoint = new CGPoint (1, .5);
}
public override void UpdateFromModel (EditorInteraction interaction)
{
LayoutIfNeeded ();
var color = interaction.Color;
var sat = this.saturationEditor.LocationFromColor (this.saturationLayer, color);
var bright = this.brightnessEditor.LocationFromColor (this.brightnessLayer, color);
var x = sat.X;
var y = bright.Y + this.saturationLayer.Frame.Y;
grip.Frame = new CGRect (x - GripRadius, y - GripRadius, GripRadius * 2, GripRadius * 2);
var hueColor = interaction.Color.HueColor;
this.saturationEditor.UpdateGradientLayer (this.saturationLayer, hueColor);
}
public override void UpdateFromLocation (EditorInteraction interaction, CGPoint location)
{
var loc = location;
var frame = saturationLayer.Frame;
if (interaction.ViewModel == null)
return;
var color = interaction.Color;
var saturation = this.saturationEditor.ValueFromLocation (this.saturationLayer, loc);
var brightness = this.saturationEditor.ValueFromLocation (
this.brightnessLayer,
new CGPoint (loc.X + brightnessLayer.Frame.X, loc.Y + brightnessLayer.Frame.Y));
interaction.Color = interaction.Color.UpdateHSB (saturation: saturation, brightness: brightness);
}
public override void Commit (EditorInteraction interaction)
{
interaction.ViewModel.CommitLastColor ();
}
}
}
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