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using System;
using System.ComponentModel;
using System.Linq;
using AppKit;
using CoreAnimation;
using CoreGraphics;
using Xamarin.PropertyEditing.Drawing;
using Xamarin.PropertyEditing.ViewModels;
namespace Xamarin.PropertyEditing.Mac
{
internal class ColorComponentEditor : ColorEditorView
{
private const int DefaultPropertyButtonSize = 10;
private const int DefaultActioButtonSize = 16;
private const int DefaultControlHeight = 22;
private const int DefaultGradientHeight = 4;
private ChannelEditorType EditorType { get; }
public bool ClickableGradients { get; set; } = true;
public ColorComponentEditor (ChannelEditorType editorType, CGRect frame) : base (frame)
{
EditorType = EditorType;
Initialize ();
}
public ColorComponentEditor (ChannelEditorType editorType) : base ()
{
EditorType = editorType;
Initialize ();
}
private ChannelGroup [] Editors { get; set; }
private UnfocusableTextField hexLabel;
private NSTextField hexEditor;
class ChannelGroup
{
public UnfocusableTextField Label { get; set; }
public ComponentSpinEditor Editor { get; set; }
public CAGradientLayer Gradient { get; set; }
}
private ChannelGroup CreateEditor (ChannelEditor editor)
{
var ce = new ChannelGroup {
Label = new UnfocusableTextField {
StringValue = $"{editor.Name}:",
Alignment = NSTextAlignment.Right,
BackgroundColor = NSColor.Clear
},
Editor = new ComponentSpinEditor (editor) {
BackgroundColor = NSColor.Clear,
TranslatesAutoresizingMaskIntoConstraints = true
},
Gradient = new UnanimatedGradientLayer {
StartPoint = new CGPoint (0, 0),
EndPoint = new CGPoint (1, 0),
BorderWidth = .5f,
}
};
ce.Editor.ValueChanged += UpdateComponent;
AddSubview (ce.Label);
AddSubview (ce.Editor);
Layer.AddSublayer (ce.Gradient);
return ce;
}
private ChannelGroup [] CreateEditors (ChannelEditorType type)
{
switch (type) {
case ChannelEditorType.HSB:
return new [] {
CreateEditor (new HsbHueChannelEditor ()),
CreateEditor (new HsbSaturationChannelEditor ()),
CreateEditor (new HsbBrightnessChannelEditor ()),
CreateEditor (new HsbAlphaChannelEditor ())
};
case ChannelEditorType.HLS:
return new [] {
CreateEditor (new HlsHueChannelEditor ()),
CreateEditor (new HlsLightnessChannelEditor ()),
CreateEditor (new HlsSaturationChannelEditor ()),
CreateEditor (new HlsAlphaChannelEditor ())
};
case ChannelEditorType.RGB:
return new [] {
CreateEditor (new RedChannelEditor ()),
CreateEditor (new GreenChannelEditor ()),
CreateEditor (new BlueChannelEditor ()),
CreateEditor (new AlphaChannelEditor ())
};
default:
case ChannelEditorType.CMYK:
return new [] {
CreateEditor (new CyanChannelEditor ()),
CreateEditor (new MagentaChannelEditor ()),
CreateEditor (new YellowChannelEditor ()),
CreateEditor (new BlackChannelEditor ()),
CreateEditor (new AlphaChannelEditor ())
};
}
}
private void Initialize ()
{
WantsLayer = true;
Editors = CreateEditors (EditorType);
this.hexLabel = new UnfocusableTextField {
StringValue = "#:",
Alignment = NSTextAlignment.Right,
BackgroundColor = NSColor.Clear
};
AddSubview (this.hexLabel);
this.hexEditor = new NSTextField {
Alignment = NSTextAlignment.Right,
BackgroundColor = NSColor.Clear
};
AddSubview (this.hexEditor);
this.hexEditor.EditingEnded += (o, e) => {
if (CommonColor.TryParseArgbHex (this.hexEditor.StringValue, out CommonColor c)) {
ViewModel.Color = c;
this.hexEditor.StringValue = c.ToString ();
}
};
}
public override CGSize IntrinsicContentSize => new CGSize (100, 300);
void UpdateComponent (object sender, EventArgs args)
{
if (ViewModel == null)
return;
var color = ViewModel.Color;
var editor = sender as ComponentSpinEditor;
ViewModel.Color = editor.ComponentEditor.UpdateColorFromValue (color, editor.Value);
ViewModel.CommitLastColor ();
}
public override void OnPropertyChanged (object sender, PropertyChangedEventArgs e)
{
base.OnPropertyChanged (sender, e);
if (ViewModel == null)
return;
switch (e.PropertyName) {
case nameof (SolidBrushViewModel.Color):
foreach (var channelGroup in Editors) {
var editor = channelGroup.Editor;
editor.Value = editor.ComponentEditor.ValueFromColor (ViewModel.Color);
editor.ComponentEditor.UpdateGradientLayer (channelGroup.Gradient, ViewModel.Color);
}
this.hexEditor.StringValue = ViewModel.Color.ToString ();
break;
}
}
public override void UpdateConstraints ()
{
base.UpdateConstraints ();
}
private ChannelGroup activeChannel;
public override void MouseDown (NSEvent theEvent)
{
if (!ClickableGradients) {
this.activeChannel = null;
base.MouseDown (theEvent);
return;
}
var location = ConvertPointFromView (theEvent.LocationInWindow, null);
location = ConvertPointToLayer (location);
foreach (var layer in Layer.Sublayers) {
var hit = layer.PresentationLayer.HitTest (location) ?? layer.PresentationLayer.HitTest (new CGPoint (location.X, location.Y + 4));
for (var currentLayer = hit; currentLayer != null; currentLayer = currentLayer.SuperLayer) {
this.activeChannel = Editors.FirstOrDefault (ce => ce.Gradient == currentLayer.ModelLayer);
if (this.activeChannel != null) {
var channel = this.activeChannel.Editor.ComponentEditor;
var grad = this.activeChannel.Gradient;
ViewModel.Color = channel.UpdateColorFromLocation (
grad,
ViewModel.Color,
Layer.ConvertPointToLayer (location, grad.SuperLayer));
return;
}
}
}
base.MouseDown (theEvent);
}
public override void MouseDragged (NSEvent theEvent)
{
var location = ConvertPointFromView (theEvent.LocationInWindow, null);
location = ConvertPointToLayer (location);
if (this.activeChannel != null) {
var channel = this.activeChannel.Editor.ComponentEditor;
var grad = this.activeChannel.Gradient;
ViewModel.Color = channel.UpdateColorFromLocation (
grad,
ViewModel.Color,
Layer.ConvertPointToLayer (location, grad.SuperLayer));
return;
}
base.MouseMoved (theEvent);
}
public override void MouseUp (NSEvent theEvent)
{
if (this.activeChannel != null)
ViewModel.CommitLastColor ();
this.activeChannel = null;
base.MouseUp (theEvent);
}
public override void Layout ()
{
base.Layout ();
var frame = Bounds.Inset (padding, padding);
var labelFrame = new CGRect (frame.X, frame.Height - DefaultControlHeight, 20, DefaultControlHeight);
var editorFrame = new CGRect (labelFrame.Right, labelFrame.Y, frame.Width - labelFrame.Right, DefaultControlHeight);
var yOffset = DefaultControlHeight + DefaultGradientHeight + 3;
foreach (var channelGroup in Editors) {
channelGroup.Label.Frame = labelFrame;
channelGroup.Editor.Frame = editorFrame;
channelGroup.Gradient.Frame = new CGRect (
editorFrame.X,
editorFrame.Y - DefaultGradientHeight + 1,
editorFrame.Width - 16, DefaultGradientHeight);
channelGroup.Gradient.BorderColor = NSColor.DisabledControlText.CGColor;
channelGroup.Gradient.ContentsScale = Window?.Screen?.BackingScaleFactor ?? NSScreen.MainScreen.BackingScaleFactor;
labelFrame = labelFrame.Translate (0, -yOffset);
editorFrame = editorFrame.Translate (0, -yOffset);
}
this.hexLabel.Frame = new CGRect (frame.X, padding, 20, DefaultControlHeight);
this.hexEditor.Frame = new CGRect (
labelFrame.Right,
padding,
frame.Width - labelFrame.Right - 16,
DefaultControlHeight);
}
}
}
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