public KryptonKnobControlEnhanced()
{
_dottedPen = new Pen(KryptonKnobUtilities.GetDarkColour(BackColor, 40))
{
DashStyle = DashStyle.Dash, DashCap = DashCap.Flat
};
InitializeComponent();
_knobTypeface = new Font(Font.FontFamily, Font.Size);
_scaleTypeface = new Font(Font.FontFamily, Font.Size);
// Properties initialisation
// "start angle" and "end angle" possible values:
// 90 = bottom (minimum value for "start angle")
// 180 = left
// 270 = top
// 360 = right
// 450 = bottom again (maximum value for "end angle")
// So the couple (90, 450) will give an entire circle and the couple (180, 360) will give half a circle.
_startAngle = 135;
_endAngle = 405;
_deltaAngle = _endAngle - _startAngle;
_minimum = 0;
_maximum = 100;
_scaleDivisions = 11;
_scaleSubDivisions = 4;
_mouseWheelBarPartitions = 10;
_scaleColour = Color.Black;
_knobBackColour = Color.White;
SetDimensions();
if (((_palette != null)))
{
_palette.PalettePaint += OnPalettePaint;
}
KryptonManager.GlobalPaletteChanged += OnGlobalPaletteChanged;
_palette = KryptonManager.CurrentGlobalPalette;
_paletteRedirect = new PaletteRedirect(_palette);
_paletteBack = new PaletteBackInheritRedirect(_paletteRedirect);
_paletteBorder = new PaletteBorderInheritRedirect(_paletteRedirect);
_paletteContent = new PaletteContentInheritRedirect(_paletteRedirect);
InitiliseColourScheme();
}
/// <summary>
/// Set position of button inside its rectangle to insure that divisions will fit.
/// </summary>
private void SetDimensions()
{
Font font;
// Rectangle
float x, y, w, h;
x = 0;
y = 0;
w = h = Width;
// Calculate ratio
_drawRatio = w / 150;
if (_drawRatio == 0.0)
{
_drawRatio = 1;
}
if (_showLargeScale)
{
Graphics Gr = this.CreateGraphics();
string strvalmax = _maximum.ToString();
string strvalmin = _minimum.ToString();
string strval = strvalmax.Length > strvalmin.Length ? strvalmax : strvalmin;
double val = Convert.ToDouble(strval);
//double val = _maximum;
String str = String.Format("{0,0:D}", (int)val);
float fSize = _scaleTypeface.Size;
if (_scaleTypefaceAutoSize)
{
fSize = (float)(6F * _drawRatio);
if (fSize < 6)
{
fSize = 6;
}
font = new Font(_scaleTypeface.FontFamily, fSize);
}
else
{
fSize = _scaleTypeface.Size;
font = new Font(_scaleTypeface.FontFamily, _scaleTypeface.Size);
}
SizeF strsize = Gr.MeasureString(str, font);
// Graduations outside
_gradLength = 4 * _drawRatio;
if (_drawDivInside)
{
// Graduations inside : remove only 2*8 pixels
//x = y = 8;
x = y = _gradLength;
w = Width - 2 * x;
}
else
{
// remove 2 * size of text and length of graduation
//_gradLength = 4 * _drawRatio;
int strw = (int)strsize.Width;
int strh = (int)strsize.Height;
int max = Math.Max(strw, strh);
x = max;
y = max;
w = (int)(Width - 2 * max - _gradLength);
}
if (w <= 0)
{
w = 1;
}
h = w;
// Rectangle of the rounded knob
this._rKnob = new Rectangle((int)x, (int)y, (int)w, (int)h);
Gr.Dispose();
}
else
{
this._rKnob = new Rectangle(0, 0, Width, Height);
}
// Center of knob
this._pKnob = new Point(_rKnob.X + _rKnob.Width / 2, _rKnob.Y + _rKnob.Height / 2);
// create offscreen image
this._offScreenImage = new Bitmap(this.Width, this.Height);
// create offscreen graphics
this._gOffScreen = Graphics.FromImage(_offScreenImage);
// Depends on retangle dimensions
// create LinearGradientBrush for creating knob
_brushKnob = new LinearGradientBrush(
_rKnob, KryptonKnobUtilities.GetLightColour(_knobBackColour, 55), KryptonKnobUtilities.GetDarkColour(_knobBackColour, 55), LinearGradientMode.ForwardDiagonal);
// create LinearGradientBrush for knobPointer
_brushKnobPointer = new LinearGradientBrush(
_rKnob, KryptonKnobUtilities.GetLightColour(_pointerColour, 55), KryptonKnobUtilities.GetDarkColour(_pointerColour, 55), LinearGradientMode.ForwardDiagonal);
}