/// <summary>
/// Construct a <see cref="ZoomState"/> object from the scale ranges settings contained
/// in the specified <see cref="GraphPane"/>.
/// </summary>
/// <param name="pane">The <see cref="GraphPane"/> from which to obtain the scale
/// range values.
/// </param>
/// <param name="type">A <see cref="StateType"/> enumeration that indicates whether
/// this saved state is from a pan or zoom.</param>
public ZoomState( GraphPane pane, StateType type )
{
_xAxis = new ScaleState( pane.XAxis );
_x2Axis = new ScaleState( pane.X2Axis );
_yAxis = new ScaleStateList( pane.YAxisList );
_y2Axis = new ScaleStateList( pane.Y2AxisList );
_type = type;
}
/// <summary>
/// Basic constructor that saves a reference to the parent
/// <see cref="GraphPane"/> object.
/// </summary>
/// <param name="pane">The parent <see cref="GraphPane"/> object.</param>
/// <param name="initialize">A <see cref="bool"/> flag to indicate whether or
/// not the drawing variables should be initialized. Initialization is not
/// required if this is part of a ZedGraph internal draw operation (i.e., its in
/// the middle of a call to <see cref="GraphPane.Draw"/>). Otherwise, you should
/// initialize to make sure the drawing variables are configured. true to do
/// an initialization, false otherwise.</param>
public ValueHandler( GraphPane pane, bool initialize )
{
_pane = pane;
if ( initialize )
{
// just create a dummy image, which results in a full draw operation
using ( Image image = pane.GetImage() )
{
}
}
}
/// <summary>
/// Gets a flag indicating if the X axis is the independent axis for this <see cref="CurveItem" />
/// </summary>
/// <param name="pane">The parent <see cref="GraphPane" /> of this <see cref="CurveItem" />.
/// </param>
/// <value>true if the X axis is independent, false otherwise</value>
internal override bool IsXIndependent( GraphPane pane )
{
return pane._barSettings.Base == BarBase.X || pane._barSettings.Base == BarBase.X2;
}
/// <summary>
/// Draw a legend key entry for this <see cref="BarItem"/> at the specified location
/// </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="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="rect">The <see cref="RectangleF"/> struct that specifies the
/// location for the legend key</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="ZedGraph.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>
public override void DrawLegendKey( Graphics g, GraphPane pane, RectangleF rect, float scaleFactor )
{
_bar.Draw( g, pane, rect, scaleFactor, true, false, null );
}
/// <summary>
/// Create a <see cref="TextObj" /> for each bar in the <see cref="GraphPane" />.
/// </summary>
/// <remarks>
/// This method will go through the bars, create a label that corresponds to the bar value,
/// and place it on the graph depending on user preferences. This works for horizontal or
/// vertical bars in clusters or stacks, but only for <see cref="BarItem" /> types. This method
/// does not apply to <see cref="ErrorBarItem" /> or <see cref="HiLowBarItem" /> objects.
/// Call this method only after calling <see cref="GraphPane.AxisChange()" />.
/// </remarks>
/// <param name="pane">The GraphPane in which to place the text labels.</param>
/// <param name="isBarCenter">true to center the labels inside the bars, false to
/// place the labels just above the top of the bar.</param>
/// <param name="valueFormat">The double.ToString string format to use for creating
/// the labels.
/// </param>
/// <param name="fontColor">The color in which to draw the labels</param>
/// <param name="fontFamily">The string name of the font family to use for the labels</param>
/// <param name="fontSize">The floating point size of the font, in scaled points</param>
/// <param name="isBold">true for a bold font type, false otherwise</param>
/// <param name="isItalic">true for an italic font type, false otherwise</param>
/// <param name="isUnderline">true for an underline font type, false otherwise</param>
public static void CreateBarLabels( GraphPane pane, bool isBarCenter, string valueFormat,
string fontFamily, float fontSize, Color fontColor, bool isBold, bool isItalic,
bool isUnderline )
{
bool isVertical = pane.BarSettings.Base == BarBase.X;
// keep a count of the number of BarItems
int curveIndex = 0;
// Get a valuehandler to do some calculations for us
ValueHandler valueHandler = new ValueHandler( pane, true );
// Loop through each curve in the list
foreach ( CurveItem curve in pane.CurveList )
{
// work with BarItems only
BarItem bar = curve as BarItem;
if ( bar != null )
{
IPointList points = curve.Points;
// ADD JKB 9/21/07
// The labelOffset should depend on whether the curve is YAxis or Y2Axis.
// JHC - Generalize to any value axis
// Make the gap between the bars and the labels = 1.5% of the axis range
float labelOffset;
Scale scale = curve.ValueAxis( pane ).Scale;
labelOffset = (float)( scale._max - scale._min ) * 0.015f;
// Loop through each point in the BarItem
for ( int i = 0; i < points.Count; i++ )
{
// Get the high, low and base values for the current bar
// note that this method will automatically calculate the "effective"
// values if the bar is stacked
double baseVal, lowVal, hiVal;
valueHandler.GetValues( curve, i, out baseVal, out lowVal, out hiVal );
// Get the value that corresponds to the center of the bar base
// This method figures out how the bars are positioned within a cluster
float centerVal = (float)valueHandler.BarCenterValue( bar,
bar.GetBarWidth( pane ), i, baseVal, curveIndex );
// Create a text label -- note that we have to go back to the original point
// data for this, since hiVal and lowVal could be "effective" values from a bar stack
string barLabelText = ( isVertical ? points[i].Y : points[i].X ).ToString( valueFormat );
// Calculate the position of the label -- this is either the X or the Y coordinate
// depending on whether they are horizontal or vertical bars, respectively
float position;
if ( isBarCenter )
position = (float)( hiVal + lowVal ) / 2.0f;
else if ( hiVal >= 0 )
position = (float)hiVal + labelOffset;
else
position = (float)hiVal - labelOffset;
// Create the new TextObj
TextObj label;
if ( isVertical )
label = new TextObj( barLabelText, centerVal, position );
else
label = new TextObj( barLabelText, position, centerVal );
label.FontSpec.Family = fontFamily;
// Configure the TextObj
// CHANGE JKB 9/21/07
// CoordinateFrame should depend on whether curve is YAxis or Y2Axis.
label.Location.CoordinateFrame =
(isVertical && curve.IsY2Axis) ? CoordType.AxisXY2Scale : CoordType.AxisXYScale;
label.FontSpec.Size = fontSize;
label.FontSpec.FontColor = fontColor;
label.FontSpec.IsItalic = isItalic;
label.FontSpec.IsBold = isBold;
label.FontSpec.IsUnderline = isUnderline;
label.FontSpec.Angle = isVertical ? 90 : 0;
label.Location.AlignH = isBarCenter ? AlignH.Center :
( hiVal >= 0 ? AlignH.Left : AlignH.Right );
label.Location.AlignV = AlignV.Center;
label.FontSpec.Border.IsVisible = false;
label.FontSpec.Fill.IsVisible = false;
// Add the TextObj to the GraphPane
pane.GraphObjList.Add( label );
}
curveIndex++;
}
}
}
/// <summary>
/// Draw the this <see cref="CurveItem"/> to the specified <see cref="Graphics"/>
/// device. The format (stair-step or line) of the curve is
/// defined by the <see cref="StepType"/> property. The routine
/// only draws the line segments; the symbols are drawn by the
/// <see cref="Symbol.Draw"/> 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="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="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>
public void DrawCurveOriginal( Graphics g, GraphPane pane,
CurveItem curve, float scaleFactor )
{
Line source = this;
if ( curve.IsSelected )
source = Selection.Line;
float tmpX, tmpY,
lastX = float.MaxValue,
lastY = float.MaxValue;
double curX, curY, lowVal;
PointPair curPt, lastPt = new PointPair();
bool lastBad = true;
IPointList points = curve.Points;
ValueHandler valueHandler = new ValueHandler( pane, false );
Axis yAxis = curve.GetYAxis( pane );
Axis xAxis = curve.GetXAxis( pane );
bool xIsLog = xAxis._scale.IsLog;
bool yIsLog = yAxis._scale.IsLog;
float minX = pane.Chart.Rect.Left;
float maxX = pane.Chart.Rect.Right;
float minY = pane.Chart.Rect.Top;
float maxY = pane.Chart.Rect.Bottom;
using ( Pen pen = source.GetPen( pane, scaleFactor ) )
{
if ( points != null && !_color.IsEmpty && this.IsVisible )
{
//bool lastOut = false;
bool isOut;
// Loop over each point in the curve
for ( int i = 0; i < points.Count; i++ )
{
curPt = points[i];
if ( pane.LineType == LineType.Stack )
{
if ( !valueHandler.GetValues( curve, i, out curX, out lowVal, out curY ) )
{
curX = PointPair.Missing;
curY = PointPair.Missing;
}
}
else
{
curX = curPt.X;
curY = curPt.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 ) ||
( xIsLog && curX <= 0.0 ) ||
( yIsLog && curY <= 0.0 ) )
{
// If the point is invalid, then make a linebreak only if IsIgnoreMissing is false
// LastX and LastY are always the last valid point, so this works out
lastBad = lastBad || !pane.IsIgnoreMissing;
isOut = true;
}
else
{
// Transform the current point from user scale units to
// screen coordinates
tmpX = xAxis.Scale.Transform( curve.IsOverrideOrdinal, i, curX );
tmpY = yAxis.Scale.Transform( curve.IsOverrideOrdinal, i, curY );
isOut = ( tmpX < minX && lastX < minX ) || ( tmpX > maxX && lastX > maxX ) ||
( tmpY < minY && lastY < minY ) || ( tmpY > maxY && lastY > maxY );
if ( !lastBad )
{
try
{
// GDI+ plots the data wrong and/or throws an exception for
// outrageous coordinates, so we do a sanity check here
if ( lastX > 5000000 || lastX < -5000000 ||
lastY > 5000000 || lastY < -5000000 ||
tmpX > 5000000 || tmpX < -5000000 ||
tmpY > 5000000 || tmpY < -5000000 )
InterpolatePoint( g, pane, curve, lastPt, scaleFactor, pen,
lastX, lastY, tmpX, tmpY );
else if ( !isOut )
{
if ( !curve.IsSelected && this._gradientFill.IsGradientValueType )
{
using ( Pen tPen = GetPen( pane, scaleFactor, lastPt ) )
{
if ( this.StepType == StepType.NonStep )
{
g.DrawLine( tPen, lastX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardStep )
{
g.DrawLine( tPen, lastX, lastY, tmpX, lastY );
g.DrawLine( tPen, tmpX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.RearwardStep )
{
g.DrawLine( tPen, lastX, lastY, lastX, tmpY );
g.DrawLine( tPen, lastX, tmpY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardSegment )
{
g.DrawLine( tPen, lastX, lastY, tmpX, lastY );
}
else
{
g.DrawLine( tPen, lastX, tmpY, tmpX, tmpY );
}
}
}
else
{
if ( this.StepType == StepType.NonStep )
{
g.DrawLine( pen, lastX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardStep )
{
g.DrawLine( pen, lastX, lastY, tmpX, lastY );
g.DrawLine( pen, tmpX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.RearwardStep )
{
g.DrawLine( pen, lastX, lastY, lastX, tmpY );
g.DrawLine( pen, lastX, tmpY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardSegment )
{
g.DrawLine( pen, lastX, lastY, tmpX, lastY );
}
else if ( this.StepType == StepType.RearwardSegment )
{
g.DrawLine( pen, lastX, tmpY, tmpX, tmpY );
}
}
}
}
catch
{
InterpolatePoint( g, pane, curve, lastPt, scaleFactor, pen,
lastX, lastY, tmpX, tmpY );
}
}
lastPt = curPt;
lastX = tmpX;
lastY = tmpY;
lastBad = false;
//lastOut = isOut;
}
}
}
}
}
/// <summary>
/// Close off a <see cref="GraphicsPath"/> that defines a curve
/// </summary>
/// <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="arrPoints">An array of <see cref="PointF"/> values in screen pixel
/// coordinates representing the current curve.</param>
/// <param name="count">The number of points contained in the "arrPoints"
/// parameter.</param>
/// <param name="yMin">The Y axis value location where the X axis crosses.</param>
/// <param name="path">The <see cref="GraphicsPath"/> class that represents the curve.</param>
public void CloseCurve( GraphPane pane, CurveItem curve, PointF[] arrPoints,
int count, double yMin, GraphicsPath path )
{
// For non-stacked lines, the fill area is just the area between the curve and the X axis
if ( pane.LineType != LineType.Stack )
{
// Determine the current value for the bottom of the curve (usually the Y value where
// the X axis crosses)
float yBase;
Axis yAxis = curve.GetYAxis( pane );
yBase = yAxis.Scale.Transform( yMin );
// Add three points to the path to move from the end of the curve (as defined by
// arrPoints) to the X axis, from there to the start of the curve at the X axis,
// and from there back up to the beginning of the curve.
path.AddLine( arrPoints[count - 1].X, arrPoints[count - 1].Y, arrPoints[count - 1].X, yBase );
path.AddLine( arrPoints[count - 1].X, yBase, arrPoints[0].X, yBase );
path.AddLine( arrPoints[0].X, yBase, arrPoints[0].X, arrPoints[0].Y );
}
// For stacked line types, the fill area is the area between this curve and the curve below it
else
{
PointF[] arrPoints2;
int count2;
float tension = _isSmooth ? _smoothTension : 0f;
// Find the next lower curve in the curveList that is also a LineItem type, and use
// its smoothing properties for the lower side of the filled area.
int index = pane.CurveList.IndexOf( curve );
if ( index > 0 )
{
CurveItem tmpCurve;
for ( int i = index - 1; i >= 0; i-- )
{
tmpCurve = pane.CurveList[i];
if ( tmpCurve is LineItem )
{
tension = ( (LineItem)tmpCurve ).Line.IsSmooth ? ( (LineItem)tmpCurve ).Line.SmoothTension : 0f;
break;
}
}
}
// Build another points array consisting of the low points (which are actually the points for
// the curve below the current curve)
BuildLowPointsArray( pane, curve, out arrPoints2, out count2 );
// Add the new points to the GraphicsPath
path.AddCurve( arrPoints2, 0, count2 - 2, tension );
}
}
/// <summary>
/// Build an array of <see cref="PointF"/> values (pixel coordinates) that represents
/// the low values for the current curve.
/// </summary>
/// <remarks>Note that this drawing routine ignores <see cref="PointPairBase.Missing"/>
/// values, but it does not "break" the line to indicate values are missing.
/// </remarks>
/// <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="arrPoints">An array of <see cref="PointF"/> values in pixel
/// coordinates representing the current curve.</param>
/// <param name="count">The number of points contained in the "arrPoints"
/// parameter.</param>
/// <returns>true for a successful points array build, false for data problems</returns>
public bool BuildLowPointsArray( GraphPane pane, CurveItem curve,
out PointF[] arrPoints, out int count )
{
arrPoints = null;
count = 0;
IPointList points = curve.Points;
if ( this.IsVisible && !this.Color.IsEmpty && points != null )
{
int index = 0;
float curX, curY,
lastX = 0,
lastY = 0;
double x, y, hiVal;
ValueHandler valueHandler = new ValueHandler( pane, false );
// Step type plots get twice as many points. Always add three points so there is
// room to close out the curve for area fills.
arrPoints = new PointF[( _stepType == ZedGraph.StepType.NonStep ? 1 : 2 ) *
( pane.LineType == LineType.Stack ? 2 : 1 ) *
points.Count + 1];
// Loop backwards over all points in the curve
// In this case an array of points was already built forward by BuildPointsArray().
// This time we build backwards to complete a loop around the area between two curves.
for ( int i = points.Count - 1; i >= 0; i-- )
{
// Make sure the current point is valid
if ( !points[i].IsInvalid )
{
// Get the user scale values for the current point
valueHandler.GetValues( curve, i, out x, out y, out hiVal );
if ( x == PointPair.Missing || y == PointPair.Missing )
continue;
// Transform the user scale values to pixel locations
Axis xAxis = curve.GetXAxis( pane );
curX = xAxis.Scale.Transform( curve.IsOverrideOrdinal, i, x );
Axis yAxis = curve.GetYAxis( pane );
curY = yAxis.Scale.Transform( curve.IsOverrideOrdinal, i, y );
// Add the pixel value pair into the points array
// Two points are added for step type curves
// ignore step-type setting for smooth curves
if ( _isSmooth || index == 0 || this.StepType == StepType.NonStep )
{
arrPoints[index].X = curX;
arrPoints[index].Y = curY;
}
else if ( this.StepType == StepType.ForwardStep )
{
arrPoints[index].X = curX;
arrPoints[index].Y = lastY;
index++;
arrPoints[index].X = curX;
arrPoints[index].Y = curY;
}
else if ( this.StepType == StepType.RearwardStep )
{
arrPoints[index].X = lastX;
arrPoints[index].Y = curY;
index++;
arrPoints[index].X = curX;
arrPoints[index].Y = curY;
}
lastX = curX;
lastY = curY;
index++;
}
}
// Make sure there is at least one valid point
if ( index == 0 )
return false;
// Add an extra point at the end, since the smoothing algorithm requires it
arrPoints[index] = arrPoints[index - 1];
index++;
count = index;
return true;
}
else
{
return false;
}
}
/// <summary>
/// Get the Y Axis instance (either <see cref="YAxis" /> or <see cref="Y2Axis" />) to
/// which this <see cref="CurveItem" /> belongs.
/// </summary>
/// <remarks>
/// This method safely retrieves a Y Axis instance from either the <see cref="GraphPane.YAxisList" />
/// or the <see cref="GraphPane.Y2AxisList" /> using the values of <see cref="YAxisIndex" /> and
/// <see cref="IsY2Axis" />. If the value of <see cref="YAxisIndex" /> is out of bounds, the
/// default <see cref="YAxis" /> or <see cref="Y2Axis" /> is used.
/// </remarks>
/// <param name="pane">The <see cref="GraphPane" /> object to which this curve belongs.</param>
/// <returns>Either a <see cref="YAxis" /> or <see cref="Y2Axis" /> to which this
/// <see cref="CurveItem" /> belongs.
/// </returns>
public Axis GetYAxis( GraphPane pane )
{
if ( _isY2Axis )
{
if ( _yAxisIndex < pane.Y2AxisList.Count )
return pane.Y2AxisList[_yAxisIndex];
else
return pane.Y2AxisList[0];
}
else
{
if ( _yAxisIndex < pane.YAxisList.Count )
return pane.YAxisList[_yAxisIndex];
else
return pane.YAxisList[0];
}
}
/// <summary>
/// Get the X Axis instance (either <see cref="XAxis" /> or <see cref="X2Axis" />) to
/// which this <see cref="CurveItem" /> belongs.
/// </summary>
/// <param name="pane">The <see cref="GraphPane" /> object to which this curve belongs.</param>
/// <returns>Either a <see cref="XAxis" /> or <see cref="X2Axis" /> to which this
/// <see cref="CurveItem" /> belongs.
/// </returns>
public Axis GetXAxis( GraphPane pane )
{
if ( _isX2Axis )
return pane.X2Axis;
else
return pane.XAxis;
}
/// <summary>
/// Go through the list of <see cref="PointPair"/> data values for this <see cref="CurveItem"/>
/// and determine the minimum and maximum values in the data.
/// </summary>
/// <param name="xMin">The minimum X value in the range of data</param>
/// <param name="xMax">The maximum X value in the range of data</param>
/// <param name="yMin">The minimum Y value in the range of data</param>
/// <param name="yMax">The maximum Y value in the range of data</param>
/// <param name="ignoreInitial">ignoreInitial is a boolean value that
/// affects the data range that is considered for the automatic scale
/// ranging (see <see cref="GraphPane.IsIgnoreInitial"/>). If true, then initial
/// data points where the Y value is zero are not included when
/// automatically determining the scale <see cref="Scale.Min"/>,
/// <see cref="Scale.Max"/>, and <see cref="Scale.MajorStep"/> size. All data after
/// the first non-zero Y value are included.
/// </param>
/// <param name="isBoundedRanges">
/// Determines if the auto-scaled axis ranges will subset the
/// data points based on any manually set scale range values.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <seealso cref="GraphPane.IsBoundedRanges"/>
public virtual void GetRange( out double xMin, out double xMax,
out double yMin, out double yMax,
bool ignoreInitial,
bool isBoundedRanges,
GraphPane pane )
{
// The lower and upper bounds of allowable data for the X values. These
// values allow you to subset the data values. If the X range is bounded, then
// the resulting range for Y will reflect the Y values for the points within the X
// bounds.
double xLBound = double.MinValue;
double xUBound = double.MaxValue;
double yLBound = double.MinValue;
double yUBound = double.MaxValue;
// initialize the values to outrageous ones to start
xMin = yMin = Double.MaxValue;
xMax = yMax = Double.MinValue;
Axis yAxis = this.GetYAxis( pane );
Axis xAxis = this.GetXAxis( pane );
if ( yAxis == null || xAxis == null )
return;
if ( isBoundedRanges )
{
xLBound = xAxis._scale._lBound;
xUBound = xAxis._scale._uBound;
yLBound = yAxis._scale._lBound;
yUBound = yAxis._scale._uBound;
}
bool isZIncluded = this.IsZIncluded( pane );
bool isXIndependent = this.IsXIndependent( pane );
bool isXLog = xAxis.Scale.IsLog;
bool isYLog = yAxis.Scale.IsLog;
bool isXOrdinal = xAxis.Scale.IsAnyOrdinal;
bool isYOrdinal = yAxis.Scale.IsAnyOrdinal;
bool isZOrdinal = ( isXIndependent ? yAxis : xAxis ).Scale.IsAnyOrdinal;
// Loop over each point in the arrays
//foreach ( PointPair point in this.Points )
for ( int i=0; i<this.Points.Count; i++ )
{
PointPair point = this.Points[i];
double curX = isXOrdinal ? i + 1 : point.X;
double curY = isYOrdinal ? i + 1 : point.Y;
double curZ = isZOrdinal ? i + 1 : point.Z;
bool outOfBounds = curX < xLBound || curX > xUBound ||
curY < yLBound || curY > yUBound ||
( isZIncluded && isXIndependent && ( curZ < yLBound || curZ > yUBound ) ) ||
( isZIncluded && !isXIndependent && ( curZ < xLBound || curZ > xUBound ) ) ||
( curX <= 0 && isXLog ) || ( curY <= 0 && isYLog );
// ignoreInitial becomes false at the first non-zero
// Y value
if ( ignoreInitial && curY != 0 &&
curY != PointPair.Missing )
ignoreInitial = false;
if ( !ignoreInitial &&
!outOfBounds &&
curX != PointPair.Missing &&
curY != PointPair.Missing )
{
if ( curX < xMin )
xMin = curX;
if ( curX > xMax )
xMax = curX;
if ( curY < yMin )
yMin = curY;
if ( curY > yMax )
yMax = curY;
if ( isZIncluded && isXIndependent && curZ != PointPair.Missing )
{
if ( curZ < yMin )
yMin = curZ;
if ( curZ > yMax )
yMax = curZ;
}
else if ( isZIncluded && curZ != PointPair.Missing )
{
if ( curZ < xMin )
xMin = curZ;
if ( curZ > xMax )
xMax = curZ;
}
}
}
}
/// <summary> /// Determine the coords for the rectangle associated with a specified point for /// this <see cref="CurveItem" /> /// </summary> /// <param name="pane">The <see cref="GraphPane" /> to which this curve belongs</param> /// <param name="i">The index of the point of interest</param> /// <param name="coords">A list of coordinates that represents the "rect" for /// this point (used in an html AREA tag)</param> /// <returns>true if it's a valid point, false otherwise</returns> public abstract bool GetCoords( GraphPane pane, int i, out string coords );
/// <summary>
/// Calculate the width of each bar, depending on the actual bar type
/// </summary>
/// <returns>The width for an individual bar, in pixel units</returns>
public float GetBarWidth( GraphPane pane )
{
// Total axis width =
// npts * ( nbars * ( bar + bargap ) - bargap + clustgap )
// cg * bar = cluster gap
// npts = max number of points in any curve
// nbars = total number of curves that are of type IsBar
// bar = bar width
// bg * bar = bar gap
// therefore:
// totwidth = npts * ( nbars * (bar + bg*bar) - bg*bar + cg*bar )
// totwidth = bar * ( npts * ( nbars * ( 1 + bg ) - bg + cg ) )
// solve for bar
float barWidth;
if ( this is ErrorBarItem )
barWidth = (float) ( ((ErrorBarItem)this).Bar.Symbol.Size *
pane.CalcScaleFactor() );
// else if ( this is HiLowBarItem && pane._barSettings.Type != BarType.ClusterHiLow )
// barWidth = (float) ( ((HiLowBarItem)this).Bar.GetBarWidth( pane,
// ((HiLowBarItem)this).BaseAxis(pane), pane.CalcScaleFactor() ) );
// barWidth = (float) ( ((HiLowBarItem)this).Bar.Size *
// pane.CalcScaleFactor() );
else // BarItem or LineItem
{
// For stacked bar types, the bar width will be based on a single bar
float numBars = 1.0F;
if ( pane._barSettings.Type == BarType.Cluster )
numBars = pane.CurveList.NumClusterableBars;
float denom = numBars * ( 1.0F + pane._barSettings.MinBarGap ) -
pane._barSettings.MinBarGap + pane._barSettings.MinClusterGap;
if ( denom <= 0 )
denom = 1;
barWidth = pane.BarSettings.GetClusterWidth() / denom;
}
if ( barWidth <= 0 )
return 1;
return barWidth;
}
/// <summary> /// Draw a legend key entry for this <see cref="CurveItem"/> at the specified location. /// This abstract base method passes through to <see cref="BarItem.DrawLegendKey"/> or /// <see cref="LineItem.DrawLegendKey"/> to do the rendering. /// </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="ZedGraph.GraphPane"/> object that is the parent or /// owner of this object. /// </param> /// <param name="rect">The <see cref="RectangleF"/> struct that specifies the /// location for the legend key</param> /// <param name="scaleFactor"> /// The scaling factor to be used for rendering objects. This is calculated and /// passed down by the parent <see cref="ZedGraph.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> public abstract void DrawLegendKey( Graphics g, GraphPane pane, RectangleF rect, float scaleFactor );
/// <summary> /// Do all rendering associated with this <see cref="CurveItem"/> to the specified /// <see cref="Graphics"/> device. This method is normally only /// called by the Draw method of the parent <see cref="ZedGraph.CurveList"/> /// collection 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="ZedGraph.GraphPane"/> object that is the parent or /// owner of this object. /// </param> /// <param name="pos">The ordinal position of the current <see cref="Bar"/> /// 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="ZedGraph.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> public abstract void Draw( Graphics g, GraphPane pane, int pos, float scaleFactor );
/// <summary>
/// This method just handles the case where one or more of the coordinates are outrageous,
/// or GDI+ threw an exception. This method attempts to correct the outrageous coordinates by
/// interpolating them to a point (along the original line) that lies at the edge of the ChartRect
/// so that GDI+ will handle it properly. GDI+ will throw an exception, or just plot the data
/// incorrectly if the coordinates are too large (empirically, this appears to be when the
/// coordinate value is greater than 5,000,000 or less than -5,000,000). Although you typically
/// would not see coordinates like this, if you repeatedly zoom in on a ZedGraphControl, eventually
/// all your points will be way outside the bounds of the plot.
/// </summary>
private void InterpolatePoint( Graphics g, GraphPane pane, CurveItem curve, PointPair lastPt,
float scaleFactor, Pen pen, float lastX, float lastY, float tmpX, float tmpY )
{
try
{
RectangleF chartRect = pane.Chart._rect;
// try to interpolate values
bool lastIn = chartRect.Contains( lastX, lastY );
bool curIn = chartRect.Contains( tmpX, tmpY );
// If both points are outside the ChartRect, make a new point that is on the LastX/Y
// side of the ChartRect, and fall through to the code that handles lastIn == true
if ( !lastIn )
{
float newX, newY;
if ( Math.Abs( lastX ) > Math.Abs( lastY ) )
{
newX = lastX < 0 ? chartRect.Left : chartRect.Right;
newY = lastY + ( tmpY - lastY ) * ( newX - lastX ) / ( tmpX - lastX );
}
else
{
newY = lastY < 0 ? chartRect.Top : chartRect.Bottom;
newX = lastX + ( tmpX - lastX ) * ( newY - lastY ) / ( tmpY - lastY );
}
lastX = newX;
lastY = newY;
}
if ( !curIn )
{
float newX, newY;
if ( Math.Abs( tmpX ) > Math.Abs( tmpY ) )
{
newX = tmpX < 0 ? chartRect.Left : chartRect.Right;
newY = tmpY + ( lastY - tmpY ) * ( newX - tmpX ) / ( lastX - tmpX );
}
else
{
newY = tmpY < 0 ? chartRect.Top : chartRect.Bottom;
newX = tmpX + ( lastX - tmpX ) * ( newY - tmpY ) / ( lastY - tmpY );
}
tmpX = newX;
tmpY = newY;
}
/*
if ( this.StepType == StepType.ForwardStep )
{
g.DrawLine( pen, lastX, lastY, tmpX, lastY );
g.DrawLine( pen, tmpX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.RearwardStep )
{
g.DrawLine( pen, lastX, lastY, lastX, tmpY );
g.DrawLine( pen, lastX, tmpY, tmpX, tmpY );
}
else // non-step
g.DrawLine( pen, lastX, lastY, tmpX, tmpY );
*/
if ( !curve.IsSelected && this._gradientFill.IsGradientValueType )
{
using ( Pen tPen = GetPen( pane, scaleFactor, lastPt ) )
{
if ( this.StepType == StepType.NonStep )
{
g.DrawLine( tPen, lastX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardStep )
{
g.DrawLine( tPen, lastX, lastY, tmpX, lastY );
g.DrawLine( tPen, tmpX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.RearwardStep )
{
g.DrawLine( tPen, lastX, lastY, lastX, tmpY );
g.DrawLine( tPen, lastX, tmpY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardSegment )
{
g.DrawLine( tPen, lastX, lastY, tmpX, lastY );
}
else
{
g.DrawLine( tPen, lastX, tmpY, tmpX, tmpY );
}
}
}
else
{
if ( this.StepType == StepType.NonStep )
{
g.DrawLine( pen, lastX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardStep )
{
g.DrawLine( pen, lastX, lastY, tmpX, lastY );
g.DrawLine( pen, tmpX, lastY, tmpX, tmpY );
}
else if ( this.StepType == StepType.RearwardStep )
{
g.DrawLine( pen, lastX, lastY, lastX, tmpY );
g.DrawLine( pen, lastX, tmpY, tmpX, tmpY );
}
else if ( this.StepType == StepType.ForwardSegment )
{
g.DrawLine( pen, lastX, lastY, tmpX, lastY );
}
else if ( this.StepType == StepType.RearwardSegment )
{
g.DrawLine( pen, lastX, tmpY, tmpX, tmpY );
}
}
}
catch { }
}
private bool IsFirstLine( GraphPane pane, CurveItem curve )
{
CurveList curveList = pane.CurveList;
for ( int j = 0; j < curveList.Count; j++ )
{
CurveItem tCurve = curveList[j];
if ( tCurve is LineItem && tCurve.IsY2Axis == curve.IsY2Axis &&
tCurve.YAxisIndex == curve.YAxisIndex )
{
return tCurve == curve;
}
}
return false;
}
/// <summary>
/// Get the index of the Y Axis in the <see cref="YAxis" /> or <see cref="Y2Axis" /> list to
/// which this <see cref="CurveItem" /> belongs.
/// </summary>
/// <remarks>
/// This method safely retrieves a Y Axis index into either the <see cref="GraphPane.YAxisList" />
/// or the <see cref="GraphPane.Y2AxisList" /> using the values of <see cref="YAxisIndex" /> and
/// <see cref="IsY2Axis" />. If the value of <see cref="YAxisIndex" /> is out of bounds, the
/// default <see cref="YAxis" /> or <see cref="Y2Axis" /> is used, which is index zero.
/// </remarks>
/// <param name="pane">The <see cref="GraphPane" /> object to which this curve belongs.</param>
/// <returns>An integer value indicating which index position in the list applies to this
/// <see cref="CurveItem" />
/// </returns>
public int GetYAxisIndex( GraphPane pane )
{
if ( _yAxisIndex >= 0 &&
_yAxisIndex < ( _isY2Axis ? pane.Y2AxisList.Count : pane.YAxisList.Count ) )
return _yAxisIndex;
else
return 0;
}
/// <summary>
/// Build an array of <see cref="PointF"/> values (pixel coordinates) that represents
/// the current curve. Note that this drawing routine ignores <see cref="PointPairBase.Missing"/>
/// values, but it does not "break" the line to indicate values are missing.
/// </summary>
/// <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="arrPoints">An array of <see cref="PointF"/> values in pixel
/// coordinates representing the current curve.</param>
/// <param name="count">The number of points contained in the "arrPoints"
/// parameter.</param>
/// <returns>true for a successful points array build, false for data problems</returns>
public bool BuildPointsArray( GraphPane pane, CurveItem curve,
out PointF[] arrPoints, out int count )
{
arrPoints = null;
count = 0;
IPointList points = curve.Points;
if ( this.IsVisible && !this.Color.IsEmpty && points != null )
{
int index = 0;
float curX, curY,
lastX = 0,
lastY = 0;
double x, y, lowVal;
ValueHandler valueHandler = new ValueHandler( pane, false );
// Step type plots get twice as many points. Always add three points so there is
// room to close out the curve for area fills.
arrPoints = new PointF[( _stepType == ZedGraph.StepType.NonStep ? 1 : 2 ) *
points.Count + 1];
// Loop over all points in the curve
for ( int i = 0; i < points.Count; i++ )
{
// make sure that the current point is valid
if ( !points[i].IsInvalid )
{
// 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 x, out lowVal, out y );
}
// 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
{
x = points[i].X;
y = points[i].Y;
}
if ( x == PointPair.Missing || y == PointPair.Missing )
continue;
// Transform the user scale values to pixel locations
Axis xAxis = curve.GetXAxis( pane );
curX = xAxis.Scale.Transform( curve.IsOverrideOrdinal, i, x );
Axis yAxis = curve.GetYAxis( pane );
curY = yAxis.Scale.Transform( curve.IsOverrideOrdinal, i, y );
if ( curX < -1000000 || curY < -1000000 || curX > 1000000 || curY > 1000000 )
continue;
// Add the pixel value pair into the points array
// Two points are added for step type curves
// ignore step-type setting for smooth curves
if ( _isSmooth || index == 0 || this.StepType == StepType.NonStep )
{
arrPoints[index].X = curX;
arrPoints[index].Y = curY;
}
else if ( this.StepType == StepType.ForwardStep ||
this.StepType == StepType.ForwardSegment )
{
arrPoints[index].X = curX;
arrPoints[index].Y = lastY;
index++;
arrPoints[index].X = curX;
arrPoints[index].Y = curY;
}
else if ( this.StepType == StepType.RearwardStep ||
this.StepType == StepType.RearwardSegment )
{
arrPoints[index].X = lastX;
arrPoints[index].Y = curY;
index++;
arrPoints[index].X = curX;
arrPoints[index].Y = curY;
}
lastX = curX;
lastY = curY;
index++;
}
}
// Make sure there is at least one valid point
if ( index == 0 )
return false;
// Add an extra point at the end, since the smoothing algorithm requires it
arrPoints[index] = arrPoints[index - 1];
index++;
count = index;
return true;
}
else
{
return false;
}
}
/// <summary>
/// Do all rendering associated with this <see cref="ErrorBarItem"/> to the specified
/// <see cref="Graphics"/> device. This method is normally only
/// called by the Draw method of the parent <see cref="ZedGraph.CurveList"/>
/// collection 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="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="pos">The ordinal position of the current <see cref="ErrorBarItem"/>
/// 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="ZedGraph.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>
public override void Draw( Graphics g, GraphPane pane, int pos, float scaleFactor )
{
if ( _isVisible )
{
_bar.Draw( g, pane, this, this.BaseAxis( pane ),
this.ValueAxis( pane ), scaleFactor );
}
}
/// <summary>
/// Do all rendering associated with this <see cref="Line"/> to the specified
/// <see cref="Graphics"/> device. This method is normally only
/// called by the Draw method of the parent <see cref="LineItem"/> 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="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="pane">
/// A reference to the <see cref="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="curve">A <see cref="LineItem"/> representing this
/// curve.</param>
public void Draw( Graphics g, GraphPane pane, CurveItem curve, float scaleFactor )
{
// If the line is being shown, draw it
if ( this.IsVisible )
{
//How to handle fill vs nofill?
//if ( isSelected )
// GraphPane.Default.SelectedLine.
SmoothingMode sModeSave = g.SmoothingMode;
if ( _isAntiAlias )
g.SmoothingMode = SmoothingMode.HighQuality;
if ( curve is StickItem )
DrawSticks( g, pane, curve, scaleFactor );
else if ( this.IsSmooth || this.Fill.IsVisible )
DrawSmoothFilledCurve( g, pane, curve, scaleFactor );
else
DrawCurve( g, pane, curve, scaleFactor );
g.SmoothingMode = sModeSave;
}
}
/// <summary>
/// Draw a legend key entry for this <see cref="ErrorBarItem"/> at the specified location
/// </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="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="rect">The <see cref="RectangleF"/> struct that specifies the
/// location for the legend key</param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="ZedGraph.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>
public override void DrawLegendKey( Graphics g, GraphPane pane, RectangleF rect,
float scaleFactor )
{
float pixBase, pixValue, pixLowValue;
if ( pane._barSettings.Base == BarBase.X )
{
pixBase = rect.Left + rect.Width / 2.0F;
pixValue = rect.Top;
pixLowValue = rect.Bottom;
}
else
{
pixBase = rect.Top + rect.Height / 2.0F;
pixValue = rect.Right;
pixLowValue = rect.Left;
}
using ( Pen pen = new Pen( _bar.Color, _bar.PenWidth ) )
{
this.Bar.Draw( g, pane, pane._barSettings.Base == BarBase.X, pixBase, pixValue,
pixLowValue, scaleFactor, pen, false, null );
}
}
/// <summary>
/// Create a <see cref="TextObj" /> for each bar in the <see cref="GraphPane" />.
/// </summary>
/// <remarks>
/// This method will go through the bars, create a label that corresponds to the bar value,
/// and place it on the graph depending on user preferences. This works for horizontal or
/// vertical bars in clusters or stacks, but only for <see cref="BarItem" /> types. This method
/// does not apply to <see cref="ErrorBarItem" /> or <see cref="HiLowBarItem" /> objects.
/// Call this method only after calling <see cref="GraphPane.AxisChange()" />.
/// </remarks>
/// <param name="pane">The GraphPane in which to place the text labels.</param>
/// <param name="isBarCenter">true to center the labels inside the bars, false to
/// place the labels just above the top of the bar.</param>
/// <param name="valueFormat">The double.ToString string format to use for creating
/// the labels.
/// </param>
public static void CreateBarLabels( GraphPane pane, bool isBarCenter, string valueFormat )
{
CreateBarLabels( pane, isBarCenter, valueFormat, TextObj.Default.FontFamily,
TextObj.Default.FontSize, TextObj.Default.FontColor, TextObj.Default.FontBold,
TextObj.Default.FontItalic, TextObj.Default.FontUnderline );
}
/// <summary>
/// Gets a flag indicating if the Z data range should be included in the axis scaling calculations.
/// </summary>
/// <param name="pane">The parent <see cref="GraphPane" /> of this <see cref="CurveItem" />.
/// </param>
/// <value>true if the Z data are included, false otherwise</value>
internal override bool IsZIncluded( GraphPane pane )
{
return true;
}
/// <summary>
/// Do all rendering associated with this <see cref="BarItem"/> to the specified
/// <see cref="Graphics"/> device. This method is normally only
/// called by the Draw method of the parent <see cref="ZedGraph.CurveList"/>
/// collection 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="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="pos">The ordinal position of the current <see cref="Bar"/>
/// 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="ZedGraph.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>
public override void Draw( Graphics g, GraphPane pane, int pos,
float scaleFactor )
{
// Pass the drawing onto the bar class
if ( _isVisible )
_bar.DrawBars( g, pane, this, BaseAxis( pane ), ValueAxis( pane ),
this.GetBarWidth( pane ), pos, scaleFactor );
}
/// <summary>
/// Render a single <see cref="Line"/> segment to the specified
/// <see cref="Graphics"/> device.
/// </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="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </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="x1">The x position of the starting point that defines the
/// line segment in screen pixel units</param>
/// <param name="y1">The y position of the starting point that defines the
/// line segment in screen pixel units</param>
/// <param name="x2">The x position of the ending point that defines the
/// line segment in screen pixel units</param>
/// <param name="y2">The y position of the ending point that defines the
/// line segment in screen pixel units</param>
public void DrawSegment( Graphics g, GraphPane pane, float x1, float y1,
float x2, float y2, float scaleFactor )
{
if ( _isVisible && !this.Color.IsEmpty )
{
using ( Pen pen = GetPen( pane, scaleFactor ) )
{
g.DrawLine( pen, x1, y1, x2, y2 );
}
}
}
/// <summary>
/// Determine the coords for the rectangle associated with a specified point for
/// this <see cref="CurveItem" />
/// </summary>
/// <param name="pane">The <see cref="GraphPane" /> to which this curve belongs</param>
/// <param name="i">The index of the point of interest</param>
/// <param name="coords">A list of coordinates that represents the "rect" for
/// this point (used in an html AREA tag)</param>
/// <returns>true if it's a valid point, false otherwise</returns>
public override bool GetCoords( GraphPane pane, int i, out string coords )
{
coords = string.Empty;
if ( i < 0 || i >= _points.Count )
return false;
Axis valueAxis = ValueAxis( pane );
Axis baseAxis = BaseAxis( pane );
// pixBase = pixel value for the bar center on the base axis
// pixHiVal = pixel value for the bar top on the value axis
// pixLowVal = pixel value for the bar bottom on the value axis
float pixBase, pixHiVal, pixLowVal;
float clusterWidth = pane.BarSettings.GetClusterWidth();
float barWidth = GetBarWidth( pane );
float clusterGap = pane._barSettings.MinClusterGap * barWidth;
float barGap = barWidth * pane._barSettings.MinBarGap;
// curBase = the scale value on the base axis of the current bar
// curHiVal = the scale value on the value axis of the current bar
// curLowVal = the scale value of the bottom of the bar
double curBase, curLowVal, curHiVal;
ValueHandler valueHandler = new ValueHandler( pane, false );
valueHandler.GetValues( this, i, out curBase, out curLowVal, out curHiVal );
// 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 ( !_points[i].IsInvalid3D )
{
// calculate a pixel value for the top of the bar on value axis
pixLowVal = valueAxis.Scale.Transform( _isOverrideOrdinal, i, curLowVal );
pixHiVal = valueAxis.Scale.Transform( _isOverrideOrdinal, i, curHiVal );
// calculate a pixel value for the center of the bar on the base axis
pixBase = baseAxis.Scale.Transform( _isOverrideOrdinal, i, curBase );
// Calculate the pixel location for the side of the bar (on the base axis)
float pixSide = pixBase - clusterWidth / 2.0F + clusterGap / 2.0F +
pane.CurveList.GetBarItemPos( pane, this ) * ( barWidth + barGap );
// Draw the bar
if ( baseAxis is XAxis || baseAxis is X2Axis )
coords = String.Format( "{0:f0},{1:f0},{2:f0},{3:f0}",
pixSide, pixLowVal,
pixSide + barWidth, pixHiVal );
else
coords = String.Format( "{0:f0},{1:f0},{2:f0},{3:f0}",
pixLowVal, pixSide,
pixHiVal, pixSide + barWidth );
return true;
}
return false;
}
/// <summary>
/// Draw the this <see cref="CurveItem"/> to the specified <see cref="Graphics"/>
/// device using the specified smoothing property (<see cref="ZedGraph.Line.SmoothTension"/>).
/// The routine draws the line segments and the area fill (if any, see <see cref="FillType"/>;
/// the symbols are drawn by the <see cref="Symbol.Draw"/> method. This method
/// is normally only called by the Draw method of the
/// <see cref="CurveItem"/> object. Note that the <see cref="StepType"/> property
/// is ignored for smooth lines (e.g., when <see cref="ZedGraph.Line.IsSmooth"/> is true).
/// </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="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="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>
public void DrawSmoothFilledCurve( Graphics g, GraphPane pane,
CurveItem curve, float scaleFactor )
{
Line source = this;
if ( curve.IsSelected )
source = Selection.Line;
PointF[] arrPoints;
int count;
IPointList points = curve.Points;
if ( this.IsVisible && !this.Color.IsEmpty && points != null &&
BuildPointsArray( pane, curve, out arrPoints, out count ) &&
count > 2 )
{
float tension = _isSmooth ? _smoothTension : 0f;
// Fill the curve if needed
if ( this.Fill.IsVisible )
{
Axis yAxis = curve.GetYAxis( pane );
using ( GraphicsPath path = new GraphicsPath( FillMode.Winding ) )
{
path.AddCurve( arrPoints, 0, count - 2, tension );
double yMin = yAxis._scale._min < 0 ? 0.0 : yAxis._scale._min;
CloseCurve( pane, curve, arrPoints, count, yMin, path );
RectangleF rect = path.GetBounds();
using ( Brush brush = source._fill.MakeBrush( rect ) )
{
if ( pane.LineType == LineType.Stack && yAxis.Scale._min < 0 &&
this.IsFirstLine( pane, curve ) )
{
float zeroPix = yAxis.Scale.Transform( 0 );
RectangleF tRect = pane.Chart._rect;
tRect.Height = zeroPix - tRect.Top;
if ( tRect.Height > 0 )
{
Region reg = g.Clip;
g.SetClip( tRect );
g.FillPath( brush, path );
g.SetClip( pane.Chart._rect );
}
}
else
g.FillPath( brush, path );
//brush.Dispose();
}
// restore the zero line if needed (since the fill tends to cover it up)
yAxis.FixZeroLine( g, pane, scaleFactor, rect.Left, rect.Right );
}
}
// If it's a smooth curve, go ahead and render the path. Otherwise, use the
// standard drawcurve method just in case there are missing values.
if ( _isSmooth )
{
using ( Pen pen = GetPen( pane, scaleFactor ) )
{
// Stroke the curve
g.DrawCurve( pen, arrPoints, 0, count - 2, tension );
//pen.Dispose();
}
}
else
DrawCurve( g, pane, curve, scaleFactor );
}
}
/// <summary>
/// Gets a flag indicating if the Z data range should be included in the axis scaling calculations.
/// </summary>
/// <param name="pane">The parent <see cref="GraphPane" /> of this <see cref="CurveItem" />.
/// </param>
/// <value>true if the Z data are included, false otherwise</value>
internal override bool IsZIncluded( GraphPane pane )
{
return this is HiLowBarItem;
}
/// <summary>
/// Render the <see cref="Line"/>'s as vertical sticks (from a <see cref="StickItem" />) to
/// the specified <see cref="Graphics"/> device.
/// </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="ZedGraph.GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="curve">A <see cref="CurveItem"/> 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>
public void DrawSticks( Graphics g, GraphPane pane, CurveItem curve, float scaleFactor )
{
Line source = this;
if ( curve.IsSelected )
source = Selection.Line;
Axis yAxis = curve.GetYAxis( pane );
Axis xAxis = curve.GetXAxis( pane );
float basePix = yAxis.Scale.Transform( 0.0 );
using ( Pen pen = source.GetPen( pane, scaleFactor ) )
{
for ( int i = 0; i < curve.Points.Count; i++ )
{
PointPair pt = curve.Points[i];
if ( pt.X != PointPair.Missing &&
pt.Y != PointPair.Missing &&
!System.Double.IsNaN( pt.X ) &&
!System.Double.IsNaN( pt.Y ) &&
!System.Double.IsInfinity( pt.X ) &&
!System.Double.IsInfinity( pt.Y ) &&
( !xAxis._scale.IsLog || pt.X > 0.0 ) &&
( !yAxis._scale.IsLog || pt.Y > 0.0 ) )
{
float pixY = yAxis.Scale.Transform( curve.IsOverrideOrdinal, i, pt.Y );
float pixX = xAxis.Scale.Transform( curve.IsOverrideOrdinal, i, pt.X );
if ( pixX >= pane.Chart._rect.Left && pixX <= pane.Chart._rect.Right )
{
if ( pixY > pane.Chart._rect.Bottom )
pixY = pane.Chart._rect.Bottom;
if ( pixY < pane.Chart._rect.Top )
pixY = pane.Chart._rect.Top;
if ( !curve.IsSelected && this._gradientFill.IsGradientValueType )
{
using ( Pen tPen = GetPen( pane, scaleFactor, pt ) )
g.DrawLine( tPen, pixX, pixY, pixX, basePix );
}
else
g.DrawLine( pen, pixX, pixY, pixX, basePix );
}
}
}
}
}
