protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
// new data source
DataSource ds = new DataSource("PlainGraph Sample");
// new record
DataRecord dr = new DataRecord("DVD");
dr.Color = Color.SkyBlue;
dr.LineWeight = 2f; // line weight
dr.AddData("2010", 3000);
dr.AddData("2011", 3500);
dr.AddData("2012", 5000);
// add record
ds.AddData(dr);
// simple way to create record and add
ds.AddData("Book", new Dictionary<string, double>(){
{ "2010", 2100 },
{ "2011", 2700 },
{ "2012", 2550 },
}).LineWeight = 3f;
graph.DataSource = ds; // update data source
graph.GraphType = PlainGraphType.Column; // change chart type
}
public static Color GetUnusedColor(DataSource dataSource)
{
Color color = new List<Color>(validColors).FirstOrDefault(c => dataSource.Records.FirstOrDefault(r => r.Color == c) == null);
if (color.IsEmpty) color = Color.Black;
return color;
}
public void UpdateDataSource(DataSource dataSource)
{
this.dataSource = dataSource;
recordInfo = new DataInfo();
// preprocess
if (dataSource != null && dataSource.Records != null && dataSource.Records.Count != 0)
{
DataRecord maxSetRecord = null;
bool autoFindSetKeys = DataSource.XDataKeys == null || DataSource.XDataKeys.Count == 0;
recordInfo.maxEntityCount = dataSource.Records.Max(r => r.Set == null ? 0 : r.Set.Count());
recordInfo.columnTotal = new double[recordInfo.maxEntityCount];
recordInfo.columnMax = new double[recordInfo.maxEntityCount];
recordInfo.columnMin = new double[recordInfo.maxEntityCount];
recordInfo.recordCount = dataSource.Records.Count;
recordInfo.recordTotal = new double[recordInfo.recordCount];
recordInfo.recordMax = new double[recordInfo.recordCount];
recordInfo.recordMin = new double[recordInfo.recordCount];
if (DataSource.Records != null)
{
for (int r = 0; r < DataSource.Records.Count; r++)
{
DataRecord row = DataSource.Records[r];
if (autoFindSetKeys && (maxSetRecord == null || row.Set.Count > maxSetRecord.Set.Count)) maxSetRecord = row;
double recordTotal = 0;
for (int i = 0; i < row.Set.Count; i++)
{
DataEntity entity = row.Set[i];
if ((this is PieGraph))
{
if (entity.Style == null) entity.Style = new DataEntityStyle();
if (entity.Style.Color.IsEmpty && (this is PieGraph))
{
entity.Style.Color = PlainGraphToolkit.GetRandomColor();
}
}
recordTotal += entity.Value;
recordInfo.columnTotal[i] += entity.Value;
recordInfo.columnTotalMax = Math.Max(recordInfo.columnTotalMax, recordInfo.columnTotal[i]);
recordInfo.columnMax[i] = Math.Max(recordInfo.columnMax[i], entity.Value);
recordInfo.columnMin[i] = Math.Min(recordInfo.columnMin[i], entity.Value);
recordInfo.maxValue = Math.Max(recordInfo.maxValue, entity.Value);
recordInfo.minValue = Math.Min(recordInfo.minValue, entity.Value);
}
recordInfo.recordTotal[r] = recordTotal;
recordInfo.recordMax[r] = Math.Max(recordInfo.recordMax[r], recordTotal);
recordInfo.recordMin[r] = Math.Min(recordInfo.recordMin[r], recordTotal);
recordInfo.total += recordTotal;
}
}
if (autoFindSetKeys && maxSetRecord != null)
XDataKeys = (from r in maxSetRecord.Set select r.Key.ToString()).ToList();
else
XDataKeys = DataSource.XDataKeys;
}
else
{
recordInfo.recordTotal = new double[0];
recordInfo.recordCount = 0;
}
//UpdateBounds(bounds);
OnUpdateDataSource();
legends.Clear();
SelectLegends();
}