/// <summary>
/// 绘制信号.
/// </summary>
/// <param name="g"></param>
/// <param name="r"></param>
/// <param name="st"></param>
/// <param name="c"></param>
private void PaintSignal(Graphics g, Rectangle r, SignalType st, Color c)
{
int X1 = 0;
int Y1 = 0;
int X2 = X1 + r.Width;
int Y2 = Y1 + r.Height;
int Xw = r.Width;
int Yh = r.Height;
int Xm = X1 + Xw / 2; // X possition of middle point.
int Ym = Y1 + Yh / 2; // Y possition of middle point.
int Nper = 3; // Number of periodes that schud be shown.
int Xpw = Xw / Nper; // One Periode length in pixel.
int Yah = 3 * Yh / 8; // Signal amplitude height in picel.
g.SmoothingMode = SmoothingMode.HighQuality;
// Create a custom pen:
Pen myPen = new Pen(Color.LightGray);
myPen.DashStyle = DashStyle.Dot;
//Draw vertical grid lines:
for (int i = 1; i < 2 * Nper; i++)
{
g.DrawLine(myPen, X1 + (Xpw / 2) * i, Y1, X1 + (Xpw / 2) * i, Y2);
}
//Draw horisontal grid lines:
g.DrawLine(myPen, X1, Ym - Yah, X2, Ym - Yah);
g.DrawLine(myPen, X1, Ym, X2, Ym);
g.DrawLine(myPen, X1, Ym + Yah, X2, Ym + Yah);
// Create requider signal generator:
SignalGenerator sg = new SignalGenerator(st);
// Adjust aignal generator:
sg.Frequency = 1f / Xpw;
sg.Phase = 0f;
sg.Amplitude = Yah;
sg.Offset = 0f;
sg.Invert = false;
// Generate signal and draw it:
float Xold = 0f;
float Yold = 0f;
float Xnew = 0f;
float Ynew = 0f;
myPen.Color = c;
myPen.DashStyle = DashStyle.Solid;
myPen.Width = 2;
for (int i = 0; i < Xw; i++)
{
Xnew = i;
Ynew = (float)sg.GetValue(i); // NOTE: Only for debug, not for release configuration!
if (i > 0)
{
g.DrawLine(myPen, X1 + Xold, Ym - Yold, X1 + Xnew, Ym - Ynew);
}
Xold = Xnew; Yold = Ynew;
}
// Draw the name of signal form:
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
g.DrawString(st.ToString(),
new Font("Times", 8, FontStyle.Bold),
new SolidBrush(Color.Black),
X2 - Xpw / 4, 10, format);
// Draw border rectangle:
g.DrawRectangle(new Pen(Color.Tomato, 2), X1 + 1, Y1 + 1, Xw - 2, Yh - 2);
}
public void Synchronize(SignalGenerator instance)
{
startTime = instance.startTime;
ticksPerSecond = instance.ticksPerSecond;
}
