/// <summary>
/// Converts a neutral grey color to a hued color with the same level of "grey".
/// </summary>
public static Color GreyscaleToColor(Color greyscale, Color pureColor)
{
if (ColorIsPartiallyClear(greyscale))
{
greyscale = ConvertPartiallyClearToGrey(greyscale);
}
if (ColorIsBlack(greyscale))
{
return(greyscale);
}
if (ColorIsWhite(greyscale))
{
return(pureColor);
}
HSV greyscaleHSV = ConvertColors.ToHSV(greyscale);
HSV pureColorHSV = ConvertColors.ToHSV(pureColor);
Range fullRange = new Range(MAX_VALUE_AS_BLACK, 1);
Range newRange = new Range(MAX_VALUE_AS_BLACK, pureColorHSV.Value);
float adjustedValue = (float)Range.ConvertValue(fullRange, newRange, greyscaleHSV.Value);
float adjustedSaturation = greyscaleHSV.Value * pureColorHSV.Saturation;
HSV adjustedHSV = new HSV(pureColorHSV.Hue, adjustedSaturation, adjustedValue);
Color adjustedColor = ConvertColors.ToColor(adjustedHSV);
return(adjustedColor);
}
public HuePanel(Color?startColor = null)
{
this.Height = TRACKBAR_HEIGHT + 50;
this.Width = UNIT * 2;
this.BorderStyle = BorderStyle.Fixed3D;
trackBar = new TrackBar();
trackBar.Location = new Point(0, 0);
trackBar.Size = new Size(this.Width, TRACKBAR_HEIGHT);
trackBar.Minimum = 0;
trackBar.Maximum = 359;
trackBar.ValueChanged += new EventHandler(TrackBar_OnValueChanged);
this.Controls.Add(trackBar);
int swatchWidth = this.Width / UNIT;
int swatchY = trackBar.Location.Y + trackBar.Height;
for (int hue = 0; hue < 360; hue++)
{
Panel colorPanel = new Panel();
colorPanel.Location = new Point(hue * swatchWidth, swatchY);
colorPanel.Size = new Size(swatchWidth, this.Height);
colorPanel.BackColor = ConvertColors.ToColor(new HSV(hue, 1, 1));
colorPanel.Click += new EventHandler(Color_OnClick);
this.Controls.Add(colorPanel);
}
if (startColor.HasValue)
{
Hue = (int)ConvertColors.ToHSV(startColor.Value).Hue;
}
}
public void ColorFromHSV_ColorLibrary()
{
foreach (ColorLibrary.Name name in ColorLibrary.Library.Keys)
{
//arrange
TestColor testColor = ColorLibrary.Library[name];
//act
Color result = ConvertColors.ToColor(testColor.HSV);
//assert
Assert.AreEqual(testColor.Color.R, result.R);
Assert.AreEqual(testColor.Color.G, result.G);
Assert.AreEqual(testColor.Color.B, result.B);
}
}
protected override void OnPaint(PaintEventArgs e)
{
graphicsBitmap = new Bitmap(this.Width, this.Height);
using (Graphics gBitmap = Graphics.FromImage(graphicsBitmap))
{
for (int saturation = 0; saturation <= 100; saturation++)
{
for (int value = 0; value <= 100; value++)
{
int reverseValue = 100 - value;
Color color = ConvertColors.ToColor(new HSV(hue, saturation / 100f, reverseValue / 100f));
SolidBrush brush = new SolidBrush(color);
gBitmap.FillRectangle(brush, new Rectangle(saturation * swatchWidth, value * swatchWidth, swatchWidth, swatchWidth));
}
}
}
e.Graphics.DrawImage(graphicsBitmap, 0, 0);
}
/// <summary>
/// Converts a hued color to its nuetral grey equivalent, based on the pure form of the hue.
/// </summary>
public static Color ColorToGreyscale(Color color, Color pureColor)
{
if (ColorIsGreyscale(color))
{
return(color);
}
if (color == pureColor)
{
return(Color.White);
}
HSV colorHSV = ConvertColors.ToHSV(color);
HSV pureColorHSV = ConvertColors.ToHSV(pureColor);
Range fullRange = new Range(MAX_VALUE_AS_BLACK, 1);
Range newRange = new Range(MAX_VALUE_AS_BLACK, pureColorHSV.Value);
float adjustedValue = (float)Range.ConvertValue(newRange, fullRange, colorHSV.Value);
HSV adjustedHSV = new HSV(0, 0, adjustedValue);
Color adjustedColor = ConvertColors.ToColor(adjustedHSV);
return(adjustedColor);
}
private void UpdateSelectedColor()
{
Color = ConvertColors.ToColor(new HSV(huePanel.Hue, saturationValuePanel.Saturation / 100f, saturationValuePanel.Value / 100f));
selectedColorPanel.BackColor = Color;
colorDataPanel.Color = Color;
}