/// <summary>
/// Determine the value for any minor tic.
/// </summary>
/// <remarks>
/// This method properly accounts for <see cref="Scale.IsLog"/>, <see cref="Scale.IsText"/>,
/// and other axis format settings.
/// </remarks>
/// <param name="baseVal">
/// The value of the first major tic (floating point double). This tic value is the base
/// reference for all tics (including minor ones).
/// </param>
/// <param name="iTic">
/// The major tic number (0 = first major tic). For log scales, this is the actual power of 10.
/// </param>
/// <returns>
/// The specified minor tic value (floating point double).
/// </returns>
internal override double CalcMinorTicValue( double baseVal, int iTic )
{
XDate xDate = new XDate( baseVal );
switch ( _minorUnit )
{
case DateUnit.Year:
default:
xDate.AddYears( (double) iTic * _minorStep );
break;
case DateUnit.Month:
xDate.AddMonths( (double) iTic * _minorStep );
break;
case DateUnit.Day:
xDate.AddDays( (double) iTic * _minorStep );
break;
case DateUnit.Hour:
xDate.AddHours( (double) iTic * _minorStep );
break;
case DateUnit.Minute:
xDate.AddMinutes( (double) iTic * _minorStep );
break;
case DateUnit.Second:
xDate.AddSeconds( (double) iTic * _minorStep );
break;
}
return xDate.XLDate;
}
/// <summary>
/// The Copy Constructor
/// </summary>
/// <param name="rhs">The GraphPane object from which to copy</param>
public XDate( XDate rhs )
{
_xlDate = rhs._xlDate;
}
/// <summary>
/// Provides binding between <see cref="DataSource"/> and the specified pane. Extracts the
/// data from <see cref="DataSource"/> and copies it into the appropriate
/// <see cref="IPointList"/> for each <see cref="CurveItem"/> in the
/// specified <see cref="GraphPane"/>.
/// </summary>
/// <param name="g">The <see cref="Graphics"/> object to be used for rendering the data.</param>
/// <param name="pane">The <see cref="GraphPane"/> object which will receive the data.</param>
protected void PopulateByDataSource( Graphics g, GraphPane pane )
{
if ( this.CurveList.Count == 0 )
return;
//If the Datasource column names are available we can bind them
// correctly to their corresponding DataMember.
if ( this.DataMember != null && this.DataMember != String.Empty
&& this.DataSource != null
&& this.DataSource is ITypedList
&& this.DataSource is IListSource
)
{
ITypedList tlist = this.DataSource as ITypedList;
IListSource listSource = this.DataSource as IListSource;
IList list = listSource.GetList();
PropertyDescriptorCollection pdc = tlist.GetItemProperties( null );
bool bListContainsList = listSource.ContainsListCollection;
//Get the DataMember and Type of the base axis in the DataSource
string baseDataMember = this.DataMember;
PropertyDescriptor basePd = pdc.Find( baseDataMember, true );
if ( basePd == null )
throw new System.Exception( "Can't find DataMember '" + baseDataMember + "' in DataSource for the base axis." );
baseDataMember = basePd.Name;
Type baseDataType = basePd.PropertyType;
int indexBaseColumn = pdc.IndexOf( basePd );
//Foreach bar/curve
// Get its DataMember and Type in the DataSource
// Add the curve to the pane
// Add all corresponding points(baseAxis,valueAxis,0)
//Note: Z axis is not supported
foreach ( ZeeGraphWebCurveItem curveItem in this.CurveList )
{
//Axis valueAxis = curveItem.ValueAxis;
PropertyDescriptorCollection pdcValue = pdc;
IList valueList = list;
bool bValueListContainsList = bListContainsList;
//If present, use DataSource of Curve instead of main DataSource
if ( curveItem.DataSource != null
&& curveItem.DataSource is ITypedList
&& curveItem.DataSource is IListSource )
{
ITypedList valueTlist = curveItem.DataSource as ITypedList;
pdcValue = valueTlist.GetItemProperties( null );
IListSource valueListSource = curveItem.DataSource as IListSource;
valueList = valueListSource.GetList();
bValueListContainsList = valueListSource.ContainsListCollection;
}
string valueDataMember = curveItem.DataMember;
PropertyDescriptor pd = pdcValue.Find( valueDataMember, true );
if ( pd == null )
throw new System.Exception( "Can't find DataMember '" + valueDataMember + "' in DataSource for the " + curveItem.Label + " axis." );
valueDataMember = pd.Name; //Get the exact case-dependent name
Type valueDataType = pd.PropertyType;
int indexValueColumn = pdcValue.IndexOf( pd );
//Add points
PointPairList points = new PointPairList();
PointPair pair = new PointPair();
object oColumnValue;
try
{
int nRow = 0;
foreach ( object row in list )
{
//
// Value axis binding (Y axis)
//
object valueRow = valueList[nRow];
//Get item value in 'row'
if ( bValueListContainsList )
{
if ( !( valueRow is IList ) )
throw new System.InvalidCastException( "The DataSource contains a list which declares its items as lists, but these don't support the IList interface." );
oColumnValue = ( valueRow as IList )[indexValueColumn];
}
else
{
oColumnValue = pd.GetValue( valueRow );
}
//Convert value to double (always double)
double v = 0;
switch ( oColumnValue.GetType().ToString() )
{
case "System.DateTime":
v = new XDate( Convert.ToDateTime( oColumnValue ) ).XLDate;
break;
default:
try
{
v = Convert.ToDouble( oColumnValue );
}
catch
{
throw new NotImplementedException( "Conversion from " + oColumnValue.GetType() + " to double not implemented." );
}
break;
}
//
// Base axis binding (X axis)
//
pair.Tag = oColumnValue; //Original typed value
pair.Y = v;
if ( this.XAxis.Type == AxisType.DateAsOrdinal
|| this.XAxis.Type == AxisType.Date )
{
pair.X = new XDate( Convert.ToDateTime( basePd.GetValue( row ) ) ).XLDate;
}
else
pair.X = Convert.ToDouble( basePd.GetValue( row ) );
points.Add( pair );
nRow++;
}
}
catch ( System.ArgumentOutOfRangeException )
{
//A local datasource was set on this curve but it has fewer rows than the axis datasource.
//So we stop feeding this curve.
}
//Create curve in pane with its points
curveItem.CreateInPane( pane, points );
}
}
else
{
//Add curves and values set in designer
ZeeGraphWebCurveItem curve;
for ( int i = 0; i < CurveList.Count; i++ )
{
curve = CurveList[i];
PointPairList points = new PointPairList();
PointPair pair = new PointPair();
for ( int j = 0; j < curve.Points.Count; j++ )
{
curve.Points[j].CopyTo( pair );
points.Add( pair );
}
curve.CreateInPane( pane, points );
}
}
//NOTE: ZeeGraphWeb.DataMember = base axis
//NOTE: ZedGraphCurveItem.DataMember = Y
//NOTE: Z values are only supported via the callback (???)
//TODO: cache the data-map table before processing rows (???)
}
