public frm_fillcolor()
{
InitializeComponent();
PropertyInfo aProp = typeof(Control).GetProperty("DoubleBuffered", BindingFlags.NonPublic | BindingFlags.Instance);
aProp.SetValue(pnl_grad, true, null);
bitmap = new Bitmap(pnl_grad.Width, 1);
pnl_grad.BackgroundImage = bitmap;
//color_from.SelectedHSV = Structs
Structs.HSV color = new Structs.HSV();
color.h = 0;
color.s = 1;
color.v = 1;
color_from.SelectedHSV = color;
color = new Structs.HSV();
color.h = 1;
color.s = 1;
color.v = 1;
color_to.SelectedHSV = color;
color_from.OnColorChanged += delegate {
UpdateGradient(color_from.SelectedHSV, color_to.SelectedHSV);
};
color_to.OnColorChanged += delegate {
UpdateGradient(color_from.SelectedHSV, color_to.SelectedHSV);
};
UpdateGradient(color_from.SelectedHSV, color_to.SelectedHSV);
}
void UpdateHSVToRGBView()
{
Structs.HSV hsv = new Structs.HSV();
hsv.h = (tb_h.Value / 255d);
hsv.s = tb_s.Value / 255d;
hsv.v = tb_v.Value / 255d;
Structs.RGB rgb = ColorToolkit.hsv2rgb(hsv);
Color c = ColorToolkit.rgb2color(rgb);
if (!tb_r.Focused)
{
tb_r.Value = c.R;
}
if (!tb_g.Focused)
{
tb_g.Value = c.G;
}
if (!tb_b.Focused)
{
tb_b.Value = c.B;
}
UpdateTextBox();
pnl_color_view.BackColor = c;
}
void UpdateGradient(Structs.HSV start, Structs.HSV end)
{
using (Graphics g = Graphics.FromImage(bitmap)){
using (SolidBrush brush = new SolidBrush(Color.Black)){
double h_step = (end.h - start.h) / (double)pnl_grad.Width;
double s_step = (end.s - start.s) / (double)pnl_grad.Width;
double v_step = (end.v - start.v) / (double)pnl_grad.Width;
Structs.HSV newhsv = new Structs.HSV();
newhsv.h = start.h;
newhsv.s = start.s;
newhsv.v = start.v;
for (int x = 0; x < bitmap.Width; x++)
{
brush.Color = ColorToolkit.rgb2color(ColorToolkit.hsv2rgb(newhsv));
g.FillRectangle(brush, x, 0, 1, 1);
newhsv.h += h_step;
newhsv.s += s_step;
newhsv.v += v_step;
if (newhsv.h < 0)
{
newhsv.h = 0;
}
if (newhsv.h > 1)
{
newhsv.h = 1;
}
if (newhsv.s < 0)
{
newhsv.s = 0;
}
if (newhsv.s > 1)
{
newhsv.s = 1;
}
if (newhsv.v < 0)
{
newhsv.v = 0;
}
if (newhsv.v > 1)
{
newhsv.v = 1;
}
}
}
}
pnl_grad.Refresh();
}
public static Structs.HSV rgb2hsv(Structs.RGB rgb)
{
Structs.HSV hsv = new Structs.HSV();
double min, max, delta;
min = rgb.r < rgb.g ? rgb.r : rgb.g;
min = min < rgb.b ? min : rgb.b;
max = rgb.r > rgb.g ? rgb.r : rgb.g;
max = max > rgb.b ? max : rgb.b;
hsv.v = max;
delta = max - min;
if (delta < 0.000001)
{
hsv.s = 0;
hsv.h = 0;
return(hsv);
}
if (max > 0.0)
{
hsv.s = (delta / max);
}
else
{
hsv.s = 0.0;
hsv.h = 0.0;
return(hsv);
}
if (rgb.r >= max)
{
hsv.h = (rgb.g - rgb.b) / delta;
}
else if (rgb.g >= max)
{
hsv.h = 2.0 + (rgb.b - rgb.r) / delta;
}
else
{
hsv.h = 4.0 + (rgb.r - rgb.g) / delta;
}
hsv.h /= 6d;
if (hsv.h < 0.0)
{
hsv.h += 1d;
}
return(hsv);
}
void UpdateRGBToHSVView()
{
Structs.RGB rgb = ColorToolkit.color2rgb(Color.FromArgb(tb_r.Value, tb_g.Value, tb_b.Value));
Structs.HSV hsv = ColorToolkit.rgb2hsv(rgb);
if (!tb_h.Focused)
{
tb_h.Value = (int)((hsv.h) * 255d);
}
if (!tb_s.Focused)
{
tb_s.Value = (int)((hsv.s) * 255d);
}
if (!tb_v.Focused)
{
tb_v.Value = (int)((hsv.v) * 255d);
}
Color c = ColorToolkit.rgb2color(ColorToolkit.hsv2rgb(hsv));
UpdateTextBox();
pnl_color_view.BackColor = Color.FromArgb(tb_r.Value, tb_g.Value, tb_b.Value);
}
public static Structs.RGB hsv2rgb(Structs.HSV hsv)
{
double hh, p, q, t, ff;
long i;
Structs.RGB rgb = new Structs.RGB();
if (hsv.s <= 0.0)
{
rgb.r = hsv.v;
rgb.g = hsv.v;
rgb.b = hsv.v;
return(rgb);
}
hh = hsv.h;
if (hh >= 1d)
{
hh = 1.0 - hh;
}
hh *= 6d;
i = (long)(hh);
ff = hh - i;
p = hsv.v * (1.0 - hsv.s);
q = hsv.v * (1.0 - (hsv.s * ff));
t = hsv.v * (1.0 - (hsv.s * (1.0 - ff)));
switch (i)
{
case 0:
rgb.r = hsv.v;
rgb.g = t;
rgb.b = p;
break;
case 1:
rgb.r = q;
rgb.g = hsv.v;
rgb.b = p;
break;
case 2:
rgb.r = p;
rgb.g = hsv.v;
rgb.b = t;
break;
case 3:
rgb.r = p;
rgb.g = q;
rgb.b = hsv.v;
break;
case 4:
rgb.r = t;
rgb.g = p;
rgb.b = hsv.v;
break;
default:
rgb.r = hsv.v;
rgb.g = p;
rgb.b = q;
break;
}
return(rgb);
}