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/***************** NCore Softwares Pvt. Ltd., India **************************
ColorBox
Copyright (C) 2013 NCore Softwares Pvt. Ltd.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://ColorBox.codeplex.com/license
***********************************************************************************/
using System;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
namespace Tango.BrushPicker
{
class SaturationBrightnessSelector : BaseSelector
{
public Thickness OffsetPadding
{
get { return (Thickness)GetValue(OffsetPaddingProperty); }
set { SetValue(OffsetPaddingProperty, value); }
}
public static readonly DependencyProperty OffsetPaddingProperty =
DependencyProperty.Register("OffsetPadding", typeof(Thickness), typeof(SaturationBrightnessSelector), new UIPropertyMetadata(new Thickness(0.0)));
public double Hue
{
private get { return (double)GetValue(HueProperty); }
set { SetValue(HueProperty, value); }
}
public static readonly DependencyProperty HueProperty =
DependencyProperty.Register("Hue", typeof(double), typeof(SaturationBrightnessSelector), new
FrameworkPropertyMetadata(0.0, FrameworkPropertyMetadataOptions.AffectsRender, new PropertyChangedCallback(HueChanged)));
public static void HueChanged(object o, DependencyPropertyChangedEventArgs e)
{
SaturationBrightnessSelector h = (SaturationBrightnessSelector)o;
h.SetColor();
}
public double SaturationOffset
{
get { return (double)GetValue(SaturationOffsetProperty); }
set { SetValue(SaturationOffsetProperty, value); }
}
public static readonly DependencyProperty SaturationOffsetProperty =
DependencyProperty.Register("SaturationOffset", typeof(double), typeof(SaturationBrightnessSelector), new UIPropertyMetadata(0.0));
public double Saturation
{
get { return (double)GetValue(SaturationProperty); }
set { SetValue(SaturationProperty, value); }
}
public static readonly DependencyProperty SaturationProperty =
DependencyProperty.Register("Saturation", typeof(double), typeof(SaturationBrightnessSelector),
new FrameworkPropertyMetadata(0.0, new PropertyChangedCallback(SaturationChanged), new CoerceValueCallback(SaturationCoerce)));
public static void SaturationChanged(object o, DependencyPropertyChangedEventArgs e)
{
SaturationBrightnessSelector h = (SaturationBrightnessSelector)o;
h.SetSaturationOffset();
}
public static object SaturationCoerce(DependencyObject d, object Brightness)
{
double v = (double)Brightness;
if (v < 0) return 0.0;
if (v > 1) return 1.0;
return v;
}
public double BrightnessOffset
{
get { return (double)GetValue(BrightnessOffsetProperty); }
set { SetValue(BrightnessOffsetProperty, value); }
}
public static readonly DependencyProperty BrightnessOffsetProperty =
DependencyProperty.Register("BrightnessOffset", typeof(double), typeof(SaturationBrightnessSelector), new UIPropertyMetadata(0.0));
public double Brightness
{
get { return (double)GetValue(BrightnessProperty); }
set { SetValue(BrightnessProperty, value); }
}
public static readonly DependencyProperty BrightnessProperty =
DependencyProperty.Register("Brightness", typeof(double), typeof(SaturationBrightnessSelector),
new FrameworkPropertyMetadata(0.0, new PropertyChangedCallback(BrightnessChanged), new CoerceValueCallback(BrightnessCoerce)));
public static void BrightnessChanged(object o, DependencyPropertyChangedEventArgs e)
{
SaturationBrightnessSelector h = (SaturationBrightnessSelector)o;
h.SetBrightnessOffset();
}
public static object BrightnessCoerce(DependencyObject d, object Brightness)
{
double v = (double)Brightness;
if (v < 0) return 0.0;
if (v > 1) return 1.0;
return v;
}
protected override void OnMouseMove(System.Windows.Input.MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
Point p = e.GetPosition(this);
Saturation = (p.X / (this.ActualWidth - OffsetPadding.Right));
Brightness = (((this.ActualHeight - OffsetPadding.Bottom) - p.Y) / (this.ActualHeight - OffsetPadding.Bottom));
SetColor();
}
base.OnMouseMove(e);
}
protected override void OnMouseDown(MouseButtonEventArgs e)
{
Point p = e.GetPosition(this);
Saturation = (p.X / (this.ActualWidth - OffsetPadding.Right));
Brightness = (((this.ActualHeight - OffsetPadding.Bottom) - p.Y) / (this.ActualHeight - OffsetPadding.Bottom));
SetColor();
Mouse.Capture(this);
base.OnMouseDown(e);
}
protected override void OnMouseUp(MouseButtonEventArgs e)
{
this.ReleaseMouseCapture();
base.OnMouseUp(e);
}
protected override void OnRender(DrawingContext dc)
{
LinearGradientBrush h = new LinearGradientBrush();
h.StartPoint = new Point(0, 0);
h.EndPoint = new Point(1, 0);
h.GradientStops.Add(new GradientStop(Colors.White, 0.00));
h.GradientStops.Add(new GradientStop(ColorHelper.ColorFromHSB(Hue, 1, 1), 1.0));
dc.DrawRectangle(h, null, new Rect(0, 0, ActualWidth, ActualHeight));
LinearGradientBrush v = new LinearGradientBrush();
v.StartPoint = new Point(0, 0);
v.EndPoint = new Point(0, 1);
v.GradientStops.Add(new GradientStop(Color.FromArgb(0xFF, 0, 0, 0), 1.00));
v.GradientStops.Add(new GradientStop(Color.FromArgb(0x80, 0, 0, 0), 0.50));
v.GradientStops.Add(new GradientStop(Color.FromArgb(0x00, 0, 0, 0), 0.00));
dc.DrawRectangle(v, null, new Rect(0, 0, ActualWidth, ActualHeight));
SetSaturationOffset();
SetBrightnessOffset();
}
private void SetSaturationOffset()
{
SaturationOffset = OffsetPadding.Left + ((ActualWidth - (OffsetPadding.Right + OffsetPadding.Left)) * Saturation);
}
private void SetBrightnessOffset()
{
BrightnessOffset = OffsetPadding.Top + ((ActualHeight - (OffsetPadding.Bottom + OffsetPadding.Top)) - ((ActualHeight - (OffsetPadding.Bottom + OffsetPadding.Top)) * Brightness));
}
public void SetColor()
{
Color = ColorHelper.ColorFromHSB(Hue, Saturation, Brightness);
//Brush = new SolidColorBrush(Color);
}
}
}
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