/// <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="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>
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 && !this._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 = PointPairBase.Missing;
curY = PointPairBase.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 == PointPairBase.Missing || curY == PointPairBase.Missing || double.IsNaN(curX) || double.IsNaN(curY)
|| double.IsInfinity(curX) || 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)
{
this.InterpolatePoint(g, pane, curve, lastPt, scaleFactor, pen, lastX, lastY, tmpX, tmpY);
}
else if (!isOut)
{
if (!curve.IsSelected && this._gradientFill.IsGradientValueType)
{
using (Pen tPen = this.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
{
this.InterpolatePoint(g, pane, curve, lastPt, scaleFactor, pen, lastX, lastY, tmpX, tmpY);
}
}
lastPt = curPt;
lastX = tmpX;
lastY = tmpY;
lastBad = false;
// lastOut = isOut;
}
}
}
}
}
/// <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 >= this._points.Count)
{
return false;
}
PointPair pt = this._points[i];
if (pt.IsInvalid)
{
return false;
}
double x, y, z;
ValueHandler valueHandler = new ValueHandler(pane, false);
valueHandler.GetValues(this, i, out x, out z, out y);
Axis yAxis = this.GetYAxis(pane);
Axis xAxis = this.GetXAxis(pane);
PointF pixPt = new PointF(xAxis.Scale.Transform(this._isOverrideOrdinal, i, x), yAxis.Scale.Transform(this._isOverrideOrdinal, i, y));
if (!pane.Chart.Rect.Contains(pixPt))
{
return false;
}
float halfSize = this._symbol.Size * pane.CalcScaleFactor();
coords = string.Format("{0:f0},{1:f0},{2:f0},{3:f0}", pixPt.X - halfSize, pixPt.Y - halfSize, pixPt.X + halfSize, pixPt.Y + halfSize);
return true;
}
/// <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[(this._stepType == 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 == PointPairBase.Missing || y == PointPairBase.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 (this._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;
}
return false;
}
/// <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[(this._stepType == 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 == PointPairBase.Missing || y == PointPairBase.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 (this._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;
}
return false;
}
/// <summary>
/// Protected internal routine that draws the specified single bar (an individual "point") of this series 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="GraphPane"/> object that is the parent or owner of this object.
/// </param>
/// <param name="curve">
/// A <see cref="CurveItem"/> object representing the
/// <see cref="Bar"/>'s to be drawn.
/// </param>
/// <param name="index">
/// The zero-based index number for the single bar to be drawn.
/// </param>
/// <param name="pos">
/// The ordinal position of the this bar series (0=first bar, 1=second bar, etc.) in the cluster of bars.
/// </param>
/// <param name="baseAxis">
/// The <see cref="Axis"/> class instance that defines the base (independent) axis for the <see cref="Bar"/>
/// </param>
/// <param name="valueAxis">
/// The <see cref="Axis"/> class instance that defines the value (dependent) axis for the <see cref="Bar"/>
/// </param>
/// <param name="barWidth">
/// The width of each bar, in pixels.
/// </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>
protected virtual void DrawSingleBar(
Graphics g,
GraphPane pane,
CurveItem curve,
int index,
int pos,
Axis baseAxis,
Axis valueAxis,
float barWidth,
float scaleFactor)
{
// 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 = curve.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(curve, index, 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 (!curve.Points[index].IsInvalid)
{
// calculate a pixel value for the top of the bar on value axis
pixLowVal = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, index, curLowVal);
pixHiVal = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, index, curHiVal);
// calculate a pixel value for the center of the bar on the base axis
pixBase = baseAxis.Scale.Transform(curve.IsOverrideOrdinal, index, curBase);
// Calculate the pixel location for the side of the bar (on the base axis)
float pixSide = pixBase - clusterWidth / 2.0F + clusterGap / 2.0F + pos * (barWidth + barGap);
// Draw the bar
if (pane._barSettings.Base == BarBase.X)
{
this.Draw(g, pane, pixSide, pixSide + barWidth, pixLowVal, pixHiVal, scaleFactor, true, curve.IsSelected, curve.Points[index]);
}
else
{
this.Draw(g, pane, pixLowVal, pixHiVal, pixSide, pixSide + barWidth, scaleFactor, true, curve.IsSelected, curve.Points[index]);
}
}
}
/// <summary>
/// Find the data point that lies closest to the specified mouse (screen) point.
/// </summary>
/// <remarks>
/// This method will search through the specified list of curves to find which point is nearest. It will only consider points that are within
/// <see cref="Default.NearestTol"/> pixels of the screen point, and it will only consider <see cref="CurveItem"/>'s that are in
/// <paramref name="targetCurveList"/>.
/// </remarks>
/// <param name="mousePt">
/// The screen point, in pixel coordinates.
/// </param>
/// <param name="targetCurveList">
/// A <see cref="CurveList"/> object containing a subset of <see cref="CurveItem"/>'s to be searched.
/// </param>
/// <param name="nearestCurve">
/// A reference to the <see cref="CurveItem"/>
/// instance that contains the closest point. nearestCurve will be null if no data points are available.
/// </param>
/// <param name="iNearest">
/// The index number of the closest point. The actual data vpoint will then be <see cref="CurveItem.Points">CurveItem.Points[iNearest]</see>
/// . iNearest will be -1 if no data points are available.
/// </param>
/// <returns>
/// true if a point was found and that point lies within
/// <see cref="Default.NearestTol"/> pixels of the screen point, false otherwise.
/// </returns>
public bool FindNearestPoint(PointF mousePt, CurveList targetCurveList, out CurveItem nearestCurve, out int iNearest)
{
CurveItem nearestBar = null;
int iNearestBar = -1;
nearestCurve = null;
iNearest = -1;
// If the point is outside the ChartRect, always return false
if (!this._chart._rect.Contains(mousePt))
{
return false;
}
double x, x2;
double[] y;
double[] y2;
// ReverseTransform( mousePt, out x, out y, out y2 );
this.ReverseTransform(mousePt, out x, out x2, out y, out y2);
if (!this.AxisRangesValid())
{
return false;
}
ValueHandler valueHandler = new ValueHandler(this, false);
// double yPixPerUnit = chartRect.Height / ( yAxis.Max - yAxis.Min );
// double y2PixPerUnit; // = chartRect.Height / ( y2Axis.Max - y2Axis.Min );
double yPixPerUnitAct, yAct, yMinAct, yMaxAct, xAct;
double minDist = 1e20;
double xVal, yVal, dist = 99999, distX, distY;
double tolSquared = Default.NearestTol * Default.NearestTol;
int iBar = 0;
foreach (CurveItem curve in targetCurveList)
{
// test for pie first...if it's a pie rest of method superfluous
if (curve is PieItem && curve.IsVisible)
{
if (((PieItem)curve).SlicePath != null && ((PieItem)curve).SlicePath.IsVisible(mousePt))
{
nearestBar = curve;
iNearestBar = 0;
}
}
else if (curve.IsVisible)
{
int yIndex = curve.GetYAxisIndex(this);
Axis yAxis = curve.GetYAxis(this);
Axis xAxis = curve.GetXAxis(this);
if (curve.IsY2Axis)
{
yAct = y2[yIndex];
yMinAct = this._y2AxisList[yIndex]._scale._min;
yMaxAct = this._y2AxisList[yIndex]._scale._max;
}
else
{
yAct = y[yIndex];
yMinAct = this._yAxisList[yIndex]._scale._min;
yMaxAct = this._yAxisList[yIndex]._scale._max;
}
yPixPerUnitAct = this._chart._rect.Height / (yMaxAct - yMinAct);
double xPixPerUnit = this._chart._rect.Width / (xAxis._scale._max - xAxis._scale._min);
xAct = xAxis is XAxis ? x : x2;
IPointList points = curve.Points;
float barWidth = curve.GetBarWidth(this);
double barWidthUserHalf;
Axis baseAxis = curve.BaseAxis(this);
bool isXBaseAxis = baseAxis is XAxis || baseAxis is X2Axis;
if (isXBaseAxis)
{
barWidthUserHalf = barWidth / xPixPerUnit / 2.0;
}
else
{
barWidthUserHalf = barWidth / yPixPerUnitAct / 2.0;
}
if (points != null)
{
for (int iPt = 0; iPt < curve.NPts; iPt++)
{
// xVal is the user scale X value of the current point
if (xAxis._scale.IsAnyOrdinal && !curve.IsOverrideOrdinal)
{
xVal = iPt + 1.0;
}
else
{
xVal = points[iPt].X;
}
// yVal is the user scale Y value of the current point
if (yAxis._scale.IsAnyOrdinal && !curve.IsOverrideOrdinal)
{
yVal = iPt + 1.0;
}
else
{
yVal = points[iPt].Y;
}
if (xVal != PointPairBase.Missing && yVal != PointPairBase.Missing)
{
if (curve.IsBar || curve is ErrorBarItem || curve is HiLowBarItem || curve is OHLCBarItem
|| curve is JapaneseCandleStickItem)
{
double baseVal, lowVal, hiVal;
valueHandler.GetValues(curve, iPt, out baseVal, out lowVal, out hiVal);
if (lowVal > hiVal)
{
double tmpVal = lowVal;
lowVal = hiVal;
hiVal = tmpVal;
}
if (isXBaseAxis)
{
double centerVal = valueHandler.BarCenterValue(curve, barWidth, iPt, xVal, iBar);
if (xAct < centerVal - barWidthUserHalf || xAct > centerVal + barWidthUserHalf || yAct < lowVal
|| yAct > hiVal)
{
continue;
}
}
else
{
double centerVal = valueHandler.BarCenterValue(curve, barWidth, iPt, yVal, iBar);
if (yAct < centerVal - barWidthUserHalf || yAct > centerVal + barWidthUserHalf || xAct < lowVal
|| xAct > hiVal)
{
continue;
}
}
if (nearestBar == null)
{
iNearestBar = iPt;
nearestBar = curve;
}
}
else if (xVal >= xAxis._scale._min && xVal <= xAxis._scale._max && yVal >= yMinAct && yVal <= yMaxAct)
{
if (curve is LineItem && this._lineType == LineType.Stack)
{
double zVal;
valueHandler.GetValues(curve, iPt, out xVal, out zVal, out yVal);
}
distX = (xVal - xAct) * xPixPerUnit;
distY = (yVal - yAct) * yPixPerUnitAct;
dist = distX * distX + distY * distY;
if (dist >= minDist)
{
continue;
}
minDist = dist;
iNearest = iPt;
nearestCurve = curve;
}
}
}
if (curve.IsBar)
{
iBar++;
}
}
}
}
if (nearestCurve is LineItem)
{
float halfSymbol = ((LineItem)nearestCurve).Symbol.Size * this.CalcScaleFactor() / 2;
minDist -= halfSymbol * halfSymbol;
if (minDist < 0)
{
minDist = 0;
}
}
if (minDist >= tolSquared && nearestBar != null)
{
// if no point met the tolerance, but a bar was found, use it
nearestCurve = nearestBar;
iNearest = iNearestBar;
return true;
}
if (minDist < tolSquared)
{
// Did we find a close point, and is it within the tolerance?
// (minDist is the square of the distance in pixel units)
return true;
}
return false;
}
/// <summary>
/// The handle point values.
/// </summary>
/// <param name="mousePt">
/// The mouse pt.
/// </param>
/// <returns>
/// The <see cref="Point"/>.
/// </returns>
private Point HandlePointValues(Point mousePt)
{
int iPt;
GraphPane pane;
object nearestObj;
using (Graphics g = this.CreateGraphics())
{
if (this._masterPane.FindNearestPaneObject(mousePt, g, out pane, out nearestObj, out iPt))
{
if (nearestObj is CurveItem && iPt >= 0)
{
CurveItem curve = (CurveItem)nearestObj;
if (this.PointValueEvent != null)
{
string label = this.PointValueEvent(this, pane, curve, iPt);
if (label != null && label.Length > 0)
{
if (this.pointToolTip.GetToolTip(this) != label)
{
this.pointToolTip.Show(label, this);
}
}
else
{
this.pointToolTip.Hide(this);
}
}
else
{
if (curve is PieItem)
{
string label = ((PieItem)curve).Value.ToString(this._pointValueFormat);
if (this.pointToolTip.GetToolTip(this) != label)
{
this.pointToolTip.Show(label, this);
}
}
else
{
PointPair pt = curve.Points[iPt];
if (pt.Tag is string)
{
this.pointToolTip.SetToolTip(this, (string)pt.Tag);
}
else
{
double xVal, yVal, lowVal;
ValueHandler valueHandler = new ValueHandler(pane, false);
if ((curve is BarItem || curve is ErrorBarItem || curve is HiLowBarItem) && pane.BarSettings.Base != BarBase.X)
{
valueHandler.GetValues(curve, iPt, out yVal, out lowVal, out xVal);
}
else
{
valueHandler.GetValues(curve, iPt, out xVal, out lowVal, out yVal);
}
string xStr = this.MakeValueLabel(curve.GetXAxis(pane), xVal, iPt, curve.IsOverrideOrdinal);
string yStr = this.MakeValueLabel(curve.GetYAxis(pane), yVal, iPt, curve.IsOverrideOrdinal);
string label = "( " + xStr + ", " + yStr + " )";
if (this.pointToolTip.GetToolTip(this) != label)
{
this.pointToolTip.Show(label, this);
}
}
}
}
}
else
{
this.pointToolTip.Hide(this);
}
}
else
{
this.pointToolTip.Hide(this);
}
}
return mousePt;
}
/// <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 && (this._border.IsVisible || this._fill.IsVisible))
{
SmoothingMode sModeSave = g.SmoothingMode;
if (this._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 = this.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 != PointPairBase.Missing && curY != PointPairBase.Missing && !double.IsNaN(curX) && !double.IsNaN(curY)
&& !double.IsInfinity(curX) && !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 (this._fill.IsGradientValueType || this._border._gradientFill.IsGradientValueType)
{
using (Brush tBrush = this._fill.MakeBrush(rect, points[i])) using (Pen tPen = this._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;
}
}
/// <summary>
/// Draw all the <see cref="ErrorBar"/>'s to the specified <see cref="Graphics"/>
/// device as a an error bar at each defined point.
/// </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="CurveItem"/> object representing the
/// <see cref="Bar"/>'s to be drawn.
/// </param>
/// <param name="baseAxis">
/// The <see cref="Axis"/> class instance that defines the base (independent) axis for the <see cref="Bar"/>
/// </param>
/// <param name="valueAxis">
/// The <see cref="Axis"/> class instance that defines the value (dependent) axis for the <see cref="Bar"/>
/// </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 Draw(Graphics g, GraphPane pane, ErrorBarItem curve, Axis baseAxis, Axis valueAxis, float scaleFactor)
{
ValueHandler valueHandler = new ValueHandler(pane, false);
float pixBase, pixValue, pixLowValue;
double scaleBase, scaleValue, scaleLowValue;
if (curve.Points != null && this.IsVisible)
{
using (Pen pen = !curve.IsSelected ? new Pen(this._color, this._penWidth) : new Pen(Selection.Border.Color, Selection.Border.Width))
{
// Loop over each defined point
for (int i = 0; i < curve.Points.Count; i++)
{
valueHandler.GetValues(curve, i, out scaleBase, out scaleLowValue, out scaleValue);
// 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 (!curve.Points[i].IsInvalid3D && (scaleBase > 0 || !baseAxis._scale.IsLog)
&& ((scaleValue > 0 && scaleLowValue > 0) || !valueAxis._scale.IsLog))
{
pixBase = baseAxis.Scale.Transform(curve.IsOverrideOrdinal, i, scaleBase);
pixValue = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, scaleValue);
pixLowValue = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, scaleLowValue);
// if ( this.fill.IsGradientValueType )
// brush = fill.MakeBrush( _rect, _points[i] );
this.Draw(
g,
pane,
baseAxis is XAxis || baseAxis is X2Axis,
pixBase,
pixValue,
pixLowValue,
scaleFactor,
pen,
curve.IsSelected,
curve.Points[i]);
}
}
}
}
}
/// <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 >= this._points.Count)
{
return false;
}
Axis valueAxis = this.ValueAxis(pane);
Axis baseAxis = this.BaseAxis(pane);
float scaledSize = this._bar.Symbol.Size * pane.CalcScaleFactor();
// 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 = this.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 (!this._points[i].IsInvalid3D)
{
// calculate a pixel value for the top of the bar on value axis
pixLowVal = valueAxis.Scale.Transform(this._isOverrideOrdinal, i, curLowVal);
pixHiVal = valueAxis.Scale.Transform(this._isOverrideOrdinal, i, curHiVal);
// calculate a pixel value for the center of the bar on the base axis
pixBase = baseAxis.Scale.Transform(this._isOverrideOrdinal, i, curBase);
// Calculate the pixel location for the side of the bar (on the base axis)
float pixSide = pixBase - scaledSize / 2.0F;
// Draw the bar
if (baseAxis is XAxis || baseAxis is X2Axis)
{
coords = string.Format("{0:f0},{1:f0},{2:f0},{3:f0}", pixSide, pixLowVal, pixSide + scaledSize, pixHiVal);
}
else
{
coords = string.Format("{0:f0},{1:f0},{2:f0},{3:f0}", pixLowVal, pixSide, pixHiVal, pixSide + scaledSize);
}
return true;
}
return false;
}
/// <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="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="fontColor">
/// The color in which to draw the labels
/// </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++;
}
}
}
