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using System.Collections.Generic;
using Xamarin.PropertyEditing.Drawing;
namespace Xamarin.PropertyEditing.ViewModels
{
internal class BrushPropertyViewModel : PropertyViewModel<CommonBrush>
{
public BrushPropertyViewModel(IPropertyInfo property, IEnumerable<IObjectEditor> editors)
: base(property, editors)
{
if (property is IColorSpaced colorSpacedPropertyInfo) {
ColorSpaces = colorSpacedPropertyInfo.ColorSpaces;
}
}
public IReadOnlyList<string> ColorSpaces { get; }
public CommonSolidBrush PreviousSolidBrush { get; set; }
string ColorSpace => Value is CommonSolidBrush solidBrush ? solidBrush.ColorSpace : null;
CommonColor? hueColor;
public CommonColor HueColor {
get => (hueColor ?? (hueColor = LastColor.HueColor)).Value;
set {
if (!hueColor.Equals (value)) {
var saturation = Color.Saturation;
var brightness = Color.Brightness;
Color = CommonColor.FromHSB (value.Hue, saturation, brightness, Color.A);
OnPropertyChanged (nameof (Color));
hueColor = value;
OnPropertyChanged ();
Value = new CommonSolidBrush (Color, ColorSpace, Value.Opacity);
}
}
}
CommonColor? shade;
public CommonColor Shade {
get => (shade.HasValue ? shade : (shade = LastColor)).Value;
set {
if (!shade.Equals (value)) {
shade = value;
OnPropertyChanged ();
Value = new CommonSolidBrush (value, ColorSpace, Value.Opacity);
}
}
}
public CommonColor Color {
get => Value is CommonSolidBrush solidBrush ? solidBrush.Color : new CommonColor(0, 0, 0);
set {
if (!Color.Equals (value)) {
CommonColor oldHue = HueColor;
CommonColor newHue = value.HueColor;
Value = new CommonSolidBrush (value, ColorSpace, Value.Opacity);
OnPropertyChanged ();
if (!newHue.Equals (oldHue)) {
hueColor = newHue;
OnPropertyChanged (nameof (HueColor));
}
if (!value.Equals (shade)) {
shade = value;
OnPropertyChanged (nameof (Shade));
}
if (!initialColor.HasValue) {
initialColor = value;
}
}
}
}
CommonColor? initialColor;
public CommonColor InitialColor => initialColor ?? (initialColor = Color).Value;
CommonColor? lastColor;
public CommonColor LastColor => lastColor ?? (lastColor = Color).Value;
public void CommitLastColor ()
{
lastColor = Color;
shade = Color;
hueColor = Color.HueColor;
OnPropertyChanged (nameof (LastColor));
OnPropertyChanged (nameof (Shade));
OnPropertyChanged (nameof (HueColor));
Value = new CommonSolidBrush (Color, ColorSpace, Value.Opacity);
}
public void CommitShade ()
{
lastColor = Shade;
OnPropertyChanged (nameof (LastColor));
Value = new CommonSolidBrush (Shade, ColorSpace, Value.Opacity);
}
}
}
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