protected override void DrawCore(Painter painter, ChartData data)
{
base.DrawCore(painter, data);
if (data != null)
{
PaintArguments paintArguments = new PaintArguments(painter, data, ChartMargin);
int start = paintArguments.AxisXLocation;
try
{
float tmpY = painter.Height - paintArguments.AxisYLocation;
int interval = CalculateInterval(painter, data);
float ratio = paintArguments.Ratio;
foreach (DataSeries dataSeries in data.Series)
{
painter.DrawString(dataSeries.Name, Style, new ChartPoint(start + interval, tmpY + 2));
foreach (DataPoint dataPoint in dataSeries.Point)
{
start += interval;
if (dataPoint.IsValid == true)
{
ChartPoint[] rectPoint = new ChartPoint[4];
float y = dataPoint.Value / ratio;
rectPoint[0] = new ChartPoint(start, tmpY - 1);
rectPoint[1] = new ChartPoint(start, tmpY - y);
rectPoint[2] = new ChartPoint(start + interval, tmpY - y);
rectPoint[3] = new ChartPoint(start + interval, tmpY - 1);
Style.CurrentColor = Style.ColorList[dataSeries.Point.IndexOf(dataPoint)];
painter.DrawPolygon(Style, rectPoint);
if (interval > 10)
{
painter.DrawString(dataPoint.Value.ToString(), Style, new ChartPoint(start, tmpY - y - 15));
}
}
}
start += interval;
}
}
catch (IndexOutOfRangeException exception)
{
exception.Source = "Check the Painter whether is error./n Check the data source whether is error.";
throw exception;
}
}
}
private void DrawHorizontalGrid(Painter painter, ChartData data)
{
PaintArguments paintArguments = new PaintArguments(painter, data, chartMargin);
float value = data.CalculateMaxValue();
float height = 20 / paintArguments.Ratio;
ChartPoint[] points = new ChartPoint[2];
ChartPoint point = new ChartPoint();
float tmpX = paintArguments.AxisXLocation;
if (value < height)
{
//Data max value is too small, so the offset is small
for (int i = 0; i < value; i++)
{
float tmpY = painter.Height - i / paintArguments.Ratio - paintArguments.AxisYLocation;
//One line-one string
points[0] = new ChartPoint(tmpX, tmpY);
points[1] = new ChartPoint(tmpX + paintArguments.AxisWidth, tmpY);
painter.DrawLine(style, points, LineType.DotLine);
point = new ChartPoint(tmpX - 30, tmpY - 2);
painter.DrawString(i.ToString(), style, point);
}
}
else
{
float tmp = painter.Height - paintArguments.AxisYLocation;
//Normal offset
for (int i = 0; i < paintArguments.AxisHeight / height; i++)
{
float tmpY = tmp - i * height;
points[0] = new ChartPoint(tmpX, tmpY);
points[1] = new ChartPoint(tmpX + paintArguments.AxisWidth, tmpY);
painter.DrawLine(style, points, LineType.DotLine);
point = new ChartPoint(tmpX - 30, tmpY - 2);
painter.DrawString(((int)(i * height * paintArguments.Ratio)).ToString(), style, point);
}
}
}
private void DrawLegend(Painter painter, string[] legends)
{
//Four points to draw rectangle
ChartPoint[] rectanglePoint = new ChartPoint[4];
ChartPoint labelPoint;
PaintArguments paintArguments = new PaintArguments(painter, null, chartMargin);
float tmpX = paintArguments.AxisXLocation + paintArguments.AxisWidth + 15;
for (int i = 0; i < legends.Length; i++)
{
//Set four points to draw legend rectangle
float tmpY = painter.Height - paintArguments.AxisYLocation - paintArguments.AxisHeight + i * 10;
rectanglePoint[0] = new ChartPoint(tmpX, tmpY);
rectanglePoint[1] = new ChartPoint(tmpX + 6, tmpY);
rectanglePoint[2] = new ChartPoint(tmpX + 6, tmpY + 5);
rectanglePoint[3] = new ChartPoint(tmpX, tmpY + 5);
style.CurrentColor = style.ColorList[i];
painter.DrawPolygon(style, rectanglePoint);
//Set point to draw legend string
labelPoint = new ChartPoint(tmpX + 8, tmpY - 5);
painter.DrawString(legends[i], style, labelPoint);
}
}