/// <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);
}
private void Color_OnClick(object sender, EventArgs e)
{
Panel panel = sender as Panel;
HSV hsv = ConvertColors.ToHSV(panel.BackColor);
Hue = (int)hsv.Hue;
}
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;
}
}
private void Gradient_OnClick(object sender, EventArgs e)
{
Point clickPoint = this.PointToClient(new Point(MousePosition.X, MousePosition.Y));
Color color = graphicsBitmap.GetPixel(clickPoint.X, clickPoint.Y);
HSV hsv = ConvertColors.ToHSV(color);
saturation = (int)(100 * hsv.Saturation);
_value = (int)(100 * hsv.Value);
if (ColorChanged != null)
{
ColorChanged(this, new EventArgs());
}
}
public void HSVFromColor_ColorLibrary()
{
foreach (ColorLibrary.Name name in ColorLibrary.Library.Keys)
{
//arrange
TestColor testColor = ColorLibrary.Library[name];
//act
HSV result = ConvertColors.ToHSV(testColor.Color);
//assert
Assert.AreEqual(testColor.HSV.Hue, result.Hue);
Assert.AreEqual(testColor.HSV.Saturation, result.Saturation);
Assert.AreEqual(testColor.HSV.Value, result.Value);
}
}
/// <summary>
/// Returns the palest (closest to white) color in the set.
/// </summary>
public static Color FindPalestColor(HashSet <ColorAtPoint> points)
{
if (ColorIsGreyscale(points.First().Color))
{
return(Color.White);
}
Color color = Color.Black;
HSV hsv = ConvertColors.ToHSV(color);
foreach (ColorAtPoint p in points)
{
HSV pHSV = ConvertColors.ToHSV(p.Color);
if (pHSV.Value > hsv.Value)
{
color = p.Color;
hsv = pHSV;
}
}
return(color);
}
/// <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);
}
public SaturationValuePanel(Color?startColor = null)
{
int totalColorHeight = UNIT * 3;
this.Height = TRACKBAR_HEIGHT + totalColorHeight;
this.Width = TRACKBAR_HEIGHT + totalColorHeight;
this.BorderStyle = BorderStyle.Fixed3D;
saturationTrackBar = new TrackBar();
saturationTrackBar.Location = new Point(TRACKBAR_HEIGHT, 0);
saturationTrackBar.Size = new Size(totalColorHeight, TRACKBAR_HEIGHT);
saturationTrackBar.Minimum = 0;
saturationTrackBar.Maximum = 100;
saturationTrackBar.ValueChanged += new EventHandler(Saturation_OnValueChanged);
this.Controls.Add(saturationTrackBar);
valueTrackBar = new TrackBar();
valueTrackBar.Location = new Point(0, TRACKBAR_HEIGHT);
valueTrackBar.Size = new Size(TRACKBAR_HEIGHT, totalColorHeight);
valueTrackBar.Minimum = 0;
valueTrackBar.Maximum = 100;
valueTrackBar.Orientation = Orientation.Vertical;
valueTrackBar.ValueChanged += new EventHandler(Value_OnValueChanged);
this.Controls.Add(valueTrackBar);
gradientPanel = new SaturationValueGradientPanel(totalColorHeight);
gradientPanel.Location = new Point(TRACKBAR_HEIGHT, TRACKBAR_HEIGHT);
gradientPanel.ColorChanged += new EventHandler(Gradient_OnColorChange);
this.Controls.Add(gradientPanel);
if (startColor.HasValue)
{
HSV hsv = ConvertColors.ToHSV(startColor.Value);
Hue = (int)hsv.Hue;
Saturation = (int)(hsv.Saturation * 100);
Value = (int)(hsv.Value * 100);
}
}
private void DisplayData()
{
if (color == null)
{
hexadecimalData.Text = "";
rgbData.Text = "";
hsvData.Text = "";
return;
}
SetTextWithoutEvent(hexadecimalData, ConvertColors.ToHexadecimal(color.Value));
SetTextWithoutEvent(rgbData, String.Format("({0}, {1}, {2})", color.Value.R, color.Value.G, color.Value.B));
HSV hsv = ConvertColors.ToHSV(color.Value);
SetTextWithoutEvent(hsvData, String.Format("({0:0.####}, {1:0.####}, {2:0.####})", hsv.Hue, hsv.Saturation, hsv.Value));
if (!hexadecimalData.ReadOnly)
{
hexadecimalData.BackColor = COLOR_NO_ERROR;
rgbData.BackColor = COLOR_NO_ERROR;
hsvData.BackColor = COLOR_NO_ERROR;
}
}
