private void ReadyWaves()
{
for (int i = 0; i < _WaveCount; ++i)
{
WaveProperty wp = _Waves[i];
wp.Values = new double[_PointCount];
for (int j = 0; j < this._PointCount; ++j)
{
wp.Values[j] = (wp.Max - wp.Min) / _WaveCount * (i + 0.5);
}
}
valIndex = _PointCount - 1;
valueCount = 0;
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics g = e.Graphics;
int h = this.Height;
int w = this.Width;
if (!Authed || Expired)
{
SizeF size = g.MeasureString(AU_str, AU_font);
Color c = Color.FromArgb(255 - BackColor.R, 255 - BackColor.G, 255 - BackColor.B);
g.DrawString(AU_str, AU_font, new SolidBrush(c), new PointF(w - size.Width, h - size.Height));
}
// 网格
if (this._ShowGrid)
{
int gw = (int)(w / _GridSize);
for (int i = 0; i <= gw; ++i)
{
g.DrawLine(_GridPen, i * _GridSize, 0, i * _GridSize, h);
}
int gh = (int)(h / _GridSize);
for (int i = 0; i <= gh; ++i)
{
g.DrawLine(_GridPen, 0, i * _GridSize, w, i * _GridSize);
}
}
if (Expired)
{
return;
}
if (this._WaveCount > 0)
{
// 绘制各个波
int stix = (valIndex) % _PointCount;
for (int i = 0; i < _WaveCount; ++i)
{
WaveProperty wp = _Waves[i];
if (!wp.Enable)
{
continue;
}
double k = wp.Max == wp.Min ? 0 : (this.Height - 8) / (wp.Max - wp.Min);
for (int j = 0; j < (this._PointCount - 1); ++j)
{
int cj = (stix + j) % _PointCount;
int nj = (stix + j + 1) % _PointCount;
if (cj > valueCount)
{
continue;
}
int y1 = h - (int)((wp.Values[cj] - wp.Min) * k) - 4;
int y2 = h - (int)((wp.Values[nj] - wp.Min) * k) - 4;
if (y1 < 0)
{
y1 = 0;
}
if (y1 > h)
{
y1 = h;
}
if (y2 < 0)
{
y2 = 0;
}
if (y2 > h)
{
y2 = h;
}
g.DrawLine(wp.Pen, xLocations[j], y1, xLocations[j + 1], y2);
}
}
// 位置线
if (_ShowValueLine && _ValueLineIndex >= 0)
{
g.DrawLine(_ValueLinePen, xLocations[_ValueLineIndex], 0, xLocations[_ValueLineIndex], h);
int ix = (valIndex + _ValueLineIndex) % _PointCount;
for (int j = 0; j < _WaveCount; ++j)
{
WaveProperty wp = _Waves[j];
wp.CurVal = wp.Values[ix];
}
}
// 标注
if (_ShowLegend)
{
int titleh = 20;
int titlel = 20;
for (int i = 0; i < _WaveCount; ++i)
{
WaveProperty wp = _Waves[i];
if (wp.ShowTitle)
{
g.DrawLine(wp.Pen, 0, titleh * i + titleh / 2, titlel, titleh * i + titleh / 2);
g.DrawString(wp.GetTitle(), new Font(FontFamily.Families[0], titleh / 2), wp.Brush, new Point(titlel, titleh * i));
}
}
}
}
else
{
// 没有波形事的图案
SizeF size = g.MeasureString(AU_str, AU_font);
Font font = new Font(FontFamily.Families[0], 24);
String s = "MultiWaveView";
SizeF sz = g.MeasureString(s, font);
g.DrawString(s, font, Brushes.Red, new PointF((w - sz.Width) / 2, (h - sz.Height) / 2));
}
}