void _drawFFTVerticalGridLines(CustomGraphics g)
{
/* Draw x-grid lines and label the frequencies in the FFT that they point to. */
int prevEnd = 0;
int divs = 20;
double maxFrequency = 1 / (ControlPanel.TimeStep * Speed * divs * 2);
g.LineColor = Color.FromArgb(0x88, 0x00, 0x00);
for (int i = 0; i < divs; i++)
{
int x = BoundingBox.Width * i / divs;
if (x < prevEnd)
{
continue;
}
string s = ((int)Math.Round(i * maxFrequency)) + "Hz";
int sWidth = (int)Math.Ceiling(g.GetTextSize(s).Width);
prevEnd = x + sWidth + 4;
if (i > 0)
{
g.DrawLine(x, 0, x, BoundingBox.Height);
}
g.DrawLeftText(s, x + 2, BoundingBox.Height - 12);
}
}
void _drawCrosshairs(CustomGraphics g)
{
if (CirSim.Sim.DialogIsShowing())
{
return;
}
if (!BoundingBox.Contains(CirSim.Sim.MouseCursorX, CirSim.Sim.MouseCursorY))
{
return;
}
if (SelectedPlot < 0 && !ShowFFT)
{
return;
}
var info = new string[4];
int ipa = mPlots[0].StartIndex(BoundingBox.Width);
int ip = (CirSim.Sim.MouseCursorX - BoundingBox.X + ipa) & (mScopePointCount - 1);
int ct = 0;
int maxy = (BoundingBox.Height - 1) / 2;
int y = maxy;
if (SelectedPlot >= 0)
{
var plot = mVisiblePlots[SelectedPlot];
info[ct++] = plot.GetUnitText(plot.MaxValues[ip]);
int maxvy = (int)(mMainGridMult * (plot.MaxValues[ip] - mMainGridMid));
g.LineColor = plot.Color;
g.FillCircle(CirSim.Sim.MouseCursorX, BoundingBox.Y + y - maxvy, 2.5f);
}
if (ShowFFT)
{
double maxFrequency = 1 / (ControlPanel.TimeStep * Speed * 2);
info[ct++] = Utils.UnitText(maxFrequency * (CirSim.Sim.MouseCursorX - BoundingBox.X) / BoundingBox.Width, "Hz");
}
if (mVisiblePlots.Count > 0)
{
double t = CirSim.Sim.Time - ControlPanel.TimeStep * Speed * (BoundingBox.X + BoundingBox.Width - CirSim.Sim.MouseCursorX);
info[ct++] = Utils.TimeText(t);
}
int szw = 0, szh = 15 * ct;
for (int i = 0; i != ct; i++)
{
int w = (int)g.GetTextSize(info[i]).Width;
if (w > szw)
{
szw = w;
}
}
g.LineColor = CustomGraphics.WhiteColor;
g.DrawLine(CirSim.Sim.MouseCursorX, BoundingBox.Y, CirSim.Sim.MouseCursorX, BoundingBox.Y + BoundingBox.Height);
int bx = CirSim.Sim.MouseCursorX;
if (bx < szw / 2)
{
bx = szw / 2;
}
g.LineColor = ControlPanel.ChkPrintable.Checked ? Color.White : Color.Black;
g.FillRectangle(bx - szw / 2, BoundingBox.Y - szh, szw, szh);
for (int i = 0; i != ct; i++)
{
int w = (int)g.GetTextSize(info[i]).Width;
g.DrawLeftText(info[i], bx - w / 2, BoundingBox.Y - 2 - (ct - 1 - i) * 15);
}
}