public AreaControl()
{
InitializeComponent();
cs = new ChartStyleGridlines();
dc = new DataCollectionArea();
area = new DataSeriesArea();
cs.ChartCanvas = chartCanvas;
cs.TextCanvas = textCanvas;
}
internal static void AddAreas(DataCollectionArea dc, Graphics g, ChartStyle cs, XAxis xa, YAxis ya, Y2Axis y2a)
{
if (dc.ChartType != Chart2DTypeEnum.AreaChart || dc.DataSeriesList.Count == 0)
{
return;
}
//比较各列点数，面积图需统一点数(暂不处理，待优化：以最少点数为准)
int nPoints = 0;
bool isConsistant = true;
bool isY2 = false;
foreach (DataSeries ds in dc.DataSeriesList)
{
if (nPoints == 0)
{
nPoints = ds.PointList.Count;
}
else if (nPoints != ds.PointList.Count)
{
isConsistant = false;
}
if (ds.IsY2Data)
{
isY2 = true;
}
}
if (!isConsistant)
{
return;
}
float[] ySum = new float[nPoints];
PointF[] pts = new PointF[2 * nPoints];
PointF[] pt0 = new PointF[nPoints];
PointF[] pt1 = new PointF[nPoints];
for (int i = 0; i < nPoints; i++)
{
ySum[i] = dc.AreaAxis;
}
int n = 0;
Pen aPen = new Pen(Color.Black);
SolidBrush aBrush = new SolidBrush(Color.Black);
foreach (DataSeries ds in dc.DataSeriesList)
{
//Color fillColor = Color.FromArgb(dc.CMap[n, 0], dc.CMap[n, 1], dc.CMap[n, 2], dc.CMap[n, 3]);
if (ds.FillColor != Color.Empty)
{
aBrush = new SolidBrush(ds.FillColor);
}
else
{
aBrush = new SolidBrush(Color.FromArgb(180, ds.LineStyle.LineColor));
}
aPen = new Pen(ds.LineStyle.LineColor, ds.LineStyle.LineThickness);
aPen.DashStyle = ds.LineStyle.LinePattern;
// Draw lines and areas:
if (dc.AreaChartType == AreaChartTypeEnum.Area)
{
if (!isY2)
{
for (int i = 0; i < nPoints; i++)
{
pt0[i] = new PointF(((PointF)ds.PointList[i]).X, ySum[i]);
ySum[i] = ySum[i] + ((PointF)ds.PointList[i]).Y;
pt1[i] = new PointF(((PointF)ds.PointList[i]).X, ySum[i]);
pts[i] = cs.Point2D(pt0[i], xa, ya);
pts[2 * nPoints - 1 - i] = cs.Point2D(pt1[i], xa, ya);
}
}
else
{
for (int i = 0; i < nPoints; i++)
{
pt0[i] = new PointF(((PointF)ds.PointList[i]).X, ySum[i]);
ySum[i] = ySum[i] + ((PointF)ds.PointList[i]).Y;
pt1[i] = new PointF(((PointF)ds.PointList[i]).X, ySum[i]);
pts[i] = cs.Point2DY2(pt0[i], xa, y2a);
pts[2 * nPoints - 1 - i] = cs.Point2DY2(pt1[i], xa, y2a);
}
}
g.FillPolygon(aBrush, pts);
if (ds.LineStyle.IsVisible)
{
g.DrawPolygon(aPen, pts);
}
n++;
}
}
aPen.Dispose();
aBrush.Dispose();
}
