/// <summary>
/// Draws the slider arrows on both sides of the control.
/// </summary>
/// <param name="position">position value of the slider, lowest being at the bottom. The range
/// is between 0 and the controls height-9. The values will be adjusted if too large/small</param>
/// <param name="Unconditional">If Unconditional is true, the slider is drawn, otherwise some logic
/// is performed to determine is drawing is really neccessary.</param>
private void DrawSlider(Gdk.Window g, int position, bool Unconditional)
{
if (position < 0)
{
position = 0;
}
if (position > this.Allocation.Height - 9)
{
position = this.Allocation.Height - 9;
}
if (m_iMarker_Start_Y == position && !Unconditional) // If the marker position hasn't changed
{
return; // since the last time it was drawn and we don't HAVE to redraw
}
// then exit procedure
m_iMarker_Start_Y = position; // Update the controls marker position
this.ClearSlider(g); // Remove old slider
Gdk.GC gcfill = new Gdk.GC(g);
// Same gray color Photoshop uses
gcfill.RgbFgColor = GraphUtil.gdkColorFromWinForms(Color.FromArgb(116, 114, 106));
Gdk.GC gcborder = new Gdk.GC(g);
gcfill.RgbFgColor = GraphUtil.gdkColorFromWinForms(Color.White);
// Same gray color Photoshop uses
//Console.WriteLine( "position="+position );
Gdk.Point[] arrow = new Gdk.Point[7]; // GGG
arrow[0] = new Gdk.Point(1, position); // G G
arrow[1] = new Gdk.Point(3, position); // G G
arrow[2] = new Gdk.Point(7, position + 4); // G G
arrow[3] = new Gdk.Point(3, position + 8); // G G
arrow[4] = new Gdk.Point(1, position + 8); // G G
arrow[5] = new Gdk.Point(0, position + 7); // G G
arrow[6] = new Gdk.Point(0, position + 1); // G G
// GGG
g.DrawPolygon(gcfill, true, arrow); // Fill left arrow with white
g.DrawPolygon(gcborder, false, arrow); // Draw left arrow border with gray
// GGG
arrow[0] = new Gdk.Point(this.Allocation.Width - 2, position); // G G
arrow[1] = new Gdk.Point(this.Allocation.Width - 4, position); // G G
arrow[2] = new Gdk.Point(this.Allocation.Width - 8, position + 4); // G G
arrow[3] = new Gdk.Point(this.Allocation.Width - 4, position + 8); // G G
arrow[4] = new Gdk.Point(this.Allocation.Width - 2, position + 8); // G G
arrow[5] = new Gdk.Point(this.Allocation.Width - 1, position + 7); // G G
arrow[6] = new Gdk.Point(this.Allocation.Width - 1, position + 1); // G G
// GGG
g.DrawPolygon(gcfill, true, arrow); // Fill right arrow with white
g.DrawPolygon(gcborder, false, arrow); // Draw right arrow border with gray
}
/// <summary>
/// Fills in the content of the control showing all values of Red (0 to 255) for the given
/// Green and Blue.
/// </summary>
private void Draw_Style_Red(Gdk.Window g)
{
for (int i = 0; i < this.Allocation.Height - 8; i++) // i represents the current line of pixels we want to draw horizontally
{
int red = 255 - Round(255 * (double)i / (this.Allocation.Height - 8)); // red is based on the current vertical position
// Get the Color for this line
Color c = Color.FromArgb(red, m_rgb.G, m_rgb.B);
Gdk.GC gc = new Gdk.GC(g);
gc.RgbFgColor = GraphUtil.gdkColorFromWinForms(c);
g.DrawLine(gc, 11, i + 4, this.Allocation.Width - 11, i + 4); // Draw the line and loop back for next line
}
}
/// <summary>
/// Fills in the content of the control showing all values of Luminance (0 to 100%) for the given
/// Hue and Saturation.
/// </summary>
private void Draw_Style_Luminance(Gdk.Window g)
{
GraphUtil.HSL _hsl = new GraphUtil.HSL();
_hsl.H = m_hsl.H; // Use the H and S values of the current color (m_hsl)
_hsl.S = m_hsl.S;
for (int i = 0; i < this.Allocation.Height - 8; i++) // i represents the current line of pixels we want to draw horizontally
{
_hsl.L = 1.0 - (double)i / (this.Allocation.Height - 8); // L (Luminance) is based on the current vertical position
// Get the Color for this line
Color c = GraphUtil.HSL_to_RGB(_hsl);
Gdk.GC gc = new Gdk.GC(g);
gc.RgbFgColor = GraphUtil.gdkColorFromWinForms(c);
g.DrawLine(gc, 11, i + 4, this.Allocation.Width - 11, i + 4); // Draw the line and loop back for next line
}
}
// The following functions do the real work of the control, drawing the primary content (the area between the slider)
//
/// <summary>
/// Fills in the content of the control showing all values of Hue (from 0 to 360)
/// </summary>
private void Draw_Style_Hue(Gdk.Window g)
{
GraphUtil.HSL _hsl = new GraphUtil.HSL();
_hsl.S = 1.0; // S and L will both be at 100% for this DrawStyle
_hsl.L = 1.0;
for (int i = 0; i < this.Allocation.Height - 8; i++) // i represents the current line of pixels we want to draw horizontally
{
_hsl.H = 1.0 - (double)i / (this.Allocation.Height - 8); // H (hue) is based on the current vertical position
Color c = GraphUtil.HSL_to_RGB(_hsl);
Gdk.GC gc = new Gdk.GC(g);
gc.RgbFgColor = GraphUtil.gdkColorFromWinForms(c);
g.DrawLine(gc, 11, i + 4, this.Allocation.Width - 11, i + 4); // Draw the line and loop back for next line
}
}
/// <summary>
/// Draws the border around the control.
/// </summary>
private void DrawBorder(Gdk.Window g)
{
// To make the control look like Adobe Photoshop's the border around the control will be a gray line
// on the top and left side, a white line on the bottom and right side, and a black rectangle (line)
// inside the gray/white rectangle
Gdk.GC gc = new Gdk.GC(g);
gc.RgbFgColor = GraphUtil.gdkColorFromWinForms(Color.FromArgb(172, 168, 153)); // The same gray color used by Photoshop
g.DrawLine(gc, this.Allocation.Width - 2, 0, 0, 0); // Draw top line
g.DrawLine(gc, 0, 0, 0, this.Allocation.Height - 2); // Draw left hand line
gc.RgbFgColor = GraphUtil.gdkColorFromWinForms(Color.White);
g.DrawLine(gc, this.Allocation.Width - 1, 0, this.Allocation.Width - 1, this.Allocation.Height - 1); // Draw right hand line
g.DrawLine(gc, this.Allocation.Width - 1, this.Allocation.Height - 1, 0, this.Allocation.Height - 1); // Draw bottome line
gc.RgbFgColor = GraphUtil.gdkColorFromWinForms(Color.Black);
g.DrawRectangle(gc, false, 1, 1, this.Allocation.Width - 3, this.Allocation.Height - 3); // Draw inner black rectangle
}
private void UpdatePreview()
{
//hsb
TxtH.Value = Math.Round(ColorWell.HSL.H * 360);
TxtS.Value = Math.Round(ColorWell.HSL.S * 100);
TxtB.Value = Math.Round(ColorWell.HSL.L * 100);
//rgb
TxtRed.Value = ColorWell.RGB.R;
TxtBlue.Value = ColorWell.RGB.B;
TxtGreen.Value = ColorWell.RGB.G;
//cmyk
GraphUtil.CMYK cmyk = GraphUtil.RGB_to_CMYK(ColorWell.RGB);
TxtC.Value = Math.Round(cmyk.C * 100);
TxtM.Value = Math.Round(cmyk.M * 100);
TxtY.Value = Math.Round(cmyk.Y * 100);
TxtK.Value = Math.Round(cmyk.K * 100);
//hex
TxtHexa.Text = GraphUtil.Color2Hex(ColorWell.RGB);
Preview.ModifyBg(Preview.State, GraphUtil.gdkColorFromWinForms(ColorWell.RGB));
}
/// <summary>
/// Draws the marker (circle) inside the box
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="Unconditional"></param>
private void DrawMarker(Gdk.Window win, int x, int y, bool Unconditional) // *****
{ // * | *
if (x < 0)
{
x = 0; // * | *
}
if (x > this.Allocation.Width - 4)
{
x = this.Allocation.Width - 4; // * | *
}
if (y < 0)
{
y = 0; // * | *
}
if (y > this.Allocation.Height - 4)
{
y = this.Allocation.Height - 4; // *----X----*
}
// * | *
if (m_iMarker_Y == y && m_iMarker_X == x && !Unconditional) // * | *
{
return; // * | *
}
// * | *
ClearMarker(win); // *****
m_iMarker_X = x;
m_iMarker_Y = y;
//Graphics g = Gtk.DotNet.Graphics.FromDrawable( win );
//Pen pen;
GraphUtil.HSL _hsl = GetColor(x, y); // The selected color determines the color of the marker drawn over
// it (black or white)
Color color = Color.White;
if (_hsl.L < (double)200 / 255)
{
color = Color.White; // White marker if selected color is dark
}
else if (_hsl.H < (double)26 / 360 || _hsl.H > (double)200 / 360)
{
if (_hsl.S > (double)70 / 255)
{
color = Color.White;
}
else
{
color = Color.Black; // Else use a black marker for lighter colors
}
}
else
{
color = Color.Black;
}
Gdk.GC gc = new Gdk.GC(win);
gc.RgbFgColor = GraphUtil.gdkColorFromWinForms(color);
win.DrawArc(gc, false, x - 3, y - 3, 10, 10, 0 * 64, 360 * 64);
//DrawBorder(win); // Force the border to be redrawn, just in case the marker has been drawn over it.
}