/// <summary>
/// The Copy Constructor
/// </summary>
/// <param name="rhs">The <see cref="LineItem"/> object from which to copy</param>
public LineItem( LineItem rhs )
: base(rhs)
{
_symbol = new Symbol( rhs.Symbol );
_line = new Line( rhs.Line );
}
/// <summary>
/// Add a curve (<see cref="CurveItem"/> object) to the plot with
/// the given data points (double arrays) and properties.
/// This is simplified way to add curves without knowledge of the
/// <see cref="CurveList"/> class. An alternative is to use
/// the <see cref="ZeeGraph.CurveList" /> Add() method.
/// </summary>
/// <param name="label">The text label (string) for the curve that will be
/// used as a <see cref="Legend"/> entry.</param>
/// <param name="x">An array of double precision X values (the
/// independent values) that define the curve.</param>
/// <param name="y">An array of double precision Y values (the
/// dependent values) that define the curve.</param>
/// <param name="color">The color to used for the curve line,
/// symbols, etc.</param>
/// <param name="symbolType">A symbol type (<see cref="SymbolType"/>)
/// that will be used for this curve.</param>
/// <returns>A <see cref="CurveItem"/> class for the newly created curve.
/// This can then be used to access all of the curve properties that
/// are not defined as arguments to the
/// <see cref="AddCurve(string,double[],double[],Color,SymbolType)"/> method.</returns>
public LineItem AddCurve( string label, double[] x, double[] y,
Color color, SymbolType symbolType )
{
LineItem curve = new LineItem( label, x, y, color, symbolType );
_curveList.Add( curve );
return curve;
}
/// <summary>
/// Add a curve (<see cref="CurveItem"/> object) to the plot with
/// the given data points (<see cref="IPointList"/>) and properties.
/// This is simplified way to add curves without knowledge of the
/// <see cref="CurveList"/> class. An alternative is to use
/// the <see cref="ZeeGraph.CurveList" /> Add() method.
/// </summary>
/// <param name="label">The text label (string) for the curve that will be
/// used as a <see cref="Legend"/> entry.</param>
/// <param name="points">A <see cref="IPointList"/> of double precision value pairs that define
/// the X and Y values for this curve</param>
/// <param name="color">The color to used for the curve line,
/// symbols, etc.</param>
/// <param name="symbolType">A symbol type (<see cref="SymbolType"/>)
/// that will be used for this curve.</param>
/// <returns>A <see cref="CurveItem"/> class for the newly created curve.
/// This can then be used to access all of the curve properties that
/// are not defined as arguments to the
/// <see cref="AddCurve(string,IPointList,Color,SymbolType)"/> method.</returns>
public LineItem AddCurve( string label, IPointList points,
Color color, SymbolType symbolType )
{
LineItem curve = new LineItem( label, points, color, symbolType );
_curveList.Add( curve );
return curve;
}
/// <summary>
/// Draw this <see cref="CurveItem"/> to the specified <see cref="Graphics"/>
/// device as a symbol at each defined point. The routine
/// only draws the symbols; the lines are draw by the
/// <see cref="Line.DrawCurve"/> method. This method
/// is normally only called by the Draw method of the
/// <see cref="CurveItem"/> object
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="curve">A <see cref="LineItem"/> representing this
/// curve.</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <param name="isSelected">Indicates that the <see cref="Symbol" /> should be drawn
/// with attributes from the <see cref="Selection" /> class.
/// </param>
public void Draw( Graphics g, GraphPane pane, LineItem curve, float scaleFactor,
bool isSelected )
{
Symbol source = this;
if ( isSelected )
source = Selection.Symbol;
int tmpX, tmpY;
int minX = (int)pane.Chart.Rect.Left;
int maxX = (int)pane.Chart.Rect.Right;
int minY = (int)pane.Chart.Rect.Top;
int maxY = (int)pane.Chart.Rect.Bottom;
// (Dale-a-b) we'll set an element to true when it has been drawn
bool[,] isPixelDrawn = new bool[maxX + 1, maxY + 1];
double curX, curY, lowVal;
IPointList points = curve.Points;
if ( points != null && ( _border.IsVisible || _fill.IsVisible ) )
{
SmoothingMode sModeSave = g.SmoothingMode;
if ( _isAntiAlias )
g.SmoothingMode = SmoothingMode.HighQuality;
// For the sake of speed, go ahead and create a solid brush and a pen
// If it's a gradient fill, it will be created on the fly for each symbol
//SolidBrush brush = new SolidBrush( this.fill.Color );
using ( Pen pen = source._border.GetPen( pane, scaleFactor ) )
using ( GraphicsPath path = MakePath( g, scaleFactor ) )
{
RectangleF rect = path.GetBounds();
using ( Brush brush = source.Fill.MakeBrush( rect ) )
{
ValueHandler valueHandler = new ValueHandler( pane, false );
Scale xScale = curve.GetXAxis( pane ).Scale;
Scale yScale = curve.GetYAxis( pane ).Scale;
bool xIsLog = xScale.IsLog;
bool yIsLog = yScale.IsLog;
bool xIsOrdinal = xScale.IsAnyOrdinal;
double xMin = xScale.Min;
double xMax = xScale.Max;
// Loop over each defined point
for ( int i = 0; i < points.Count; i++ )
{
// Get the user scale values for the current point
// use the valueHandler only for stacked types
if ( pane.LineType == LineType.Stack )
{
valueHandler.GetValues( curve, i, out curX, out lowVal, out curY );
}
// otherwise, just access the values directly. Avoiding the valueHandler for
// non-stacked types is an optimization to minimize overhead in case there are
// a large number of points.
else
{
curX = points[i].X;
if ( curve is StickItem )
curY = points[i].Z;
else
curY = points[i].Y;
}
// Any value set to double max is invalid and should be skipped
// This is used for calculated values that are out of range, divide
// by zero, etc.
// Also, any value <= zero on a log scale is invalid
if ( curX != PointPair.Missing &&
curY != PointPair.Missing &&
!System.Double.IsNaN( curX ) &&
!System.Double.IsNaN( curY ) &&
!System.Double.IsInfinity( curX ) &&
!System.Double.IsInfinity( curY ) &&
( curX > 0 || !xIsLog ) &&
( !yIsLog || curY > 0.0 ) &&
( xIsOrdinal || ( curX >= xMin && curX <= xMax ) ) )
{
// Transform the user scale values to pixel locations
tmpX = (int) xScale.Transform( curve.IsOverrideOrdinal, i, curX );
tmpY = (int) yScale.Transform( curve.IsOverrideOrdinal, i, curY );
// Maintain an array of "used" pixel locations to avoid duplicate drawing operations
if ( tmpX >= minX && tmpX <= maxX && tmpY >= minY && tmpY <= maxY ) // guard against the zoom-in case
{
if ( isPixelDrawn[tmpX, tmpY] )
continue;
isPixelDrawn[tmpX, tmpY] = true;
}
// If the fill type for this symbol is a Gradient by value type,
// the make a brush corresponding to the appropriate current value
if ( _fill.IsGradientValueType || _border._gradientFill.IsGradientValueType )
{
using ( Brush tBrush = _fill.MakeBrush( rect, points[i] ) )
using ( Pen tPen = _border.GetPen( pane, scaleFactor, points[i] ) )
this.DrawSymbol( g, tmpX, tmpY, path, tPen, tBrush );
}
else
{
// Otherwise, the brush is already defined
// Draw the symbol at the specified pixel location
this.DrawSymbol( g, tmpX, tmpY, path, pen, brush );
}
}
}
}
}
g.SmoothingMode = sModeSave;
}
}