/// <summary>
/// Stack the histogram to another HistogramPlot.
/// </summary>
public void StackedTo(HistogramPlot hp)
{
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
SequenceAdapter hpData =
new SequenceAdapter(hp.DataSource, hp.DataMember, hp.OrdinateData, hp.AbscissaData);
if (hp != null)
{
isStacked_ = true;
if (hpData.Count != data.Count)
{
throw new FlorenceException("Can stack HistogramPlot data only with the same number of datapoints.");
}
for (int i = 0; i < data.Count; ++i)
{
if (data[i].X != hpData[i].X)
{
throw new FlorenceException("Can stack HistogramPlot data only with the same X coordinates.");
}
if (hpData[i].Y < 0.0f)
{
throw new FlorenceException("Can stack HistogramPlot data only with positive Y coordinates.");
}
}
}
stackedTo_ = hp;
}
public void CreatePlot(InteractivePlotSurface2D plotSurface)
{
double[] data = new double[] { 0, 4, 3, 2, 5, 4, 2, 3 };
double[] data2 = new double[] { 5, 2, 4, 1, 2, 1, 5, 3 };
HistogramPlot hp = new HistogramPlot();
hp.OrdinateData = data;
hp.RectangleBrush = RectangleBrushes.Horizontal.FaintRedFade;
hp.Filled = true;
hp.BaseOffset = -0.15;
hp.BaseWidth = 0.25f;
HistogramPlot hp2 = new HistogramPlot();
hp2.OrdinateData = data2;
hp2.RectangleBrush = RectangleBrushes.Horizontal.FaintGreenFade;
hp2.Filled = true;
hp2.BaseOffset = 0.15;
hp2.BaseWidth = 0.25f;
plotSurface.Clear();
plotSurface.Add(hp);
plotSurface.Add(hp2);
plotSurface.PlotBackBrush = RectangleBrushes.Vertical.FaintBlueFade;
plotSurface.Refresh();
}
public void CreatePlot(InteractivePlotSurface2D plotSurface)
{
// this example will in the future demonstrate histogram plots with +- values.
// currently not used - histograms don't support this.
plotSurface.Clear();
int[] values = { -10, 2, -3, 4, 6, -1, 10, 4, -4, -3 };
HistogramPlot hp = new HistogramPlot();
hp.OrdinateData = values;
plotSurface.Add(hp);
plotSurface.Refresh();
}
/// <summary>
/// Returns a y-axis that is suitable for drawing this plot.
/// </summary>
/// <returns>A suitable y-axis.</returns>
public Axis SuggestYAxis()
{
if (this.isStacked_)
{
double tmpMax = 0.0f;
ArrayList adapterList = new ArrayList();
HistogramPlot currentPlot = this;
do
{
adapterList.Add(new SequenceAdapter(
currentPlot.DataSource,
currentPlot.DataMember,
currentPlot.OrdinateData,
currentPlot.AbscissaData)
);
} while ((currentPlot = currentPlot.stackedTo_) != null);
SequenceAdapter[] adapters =
(SequenceAdapter[])adapterList.ToArray(typeof(SequenceAdapter));
for (int i = 0; i < adapters[0].Count; ++i)
{
double tmpHeight = 0.0f;
for (int j = 0; j < adapters.Length; ++j)
{
tmpHeight += adapters[j][i].Y;
}
tmpMax = Math.Max(tmpMax, tmpHeight);
}
Axis a = new LinearAxis(0.0f, tmpMax);
// TODO make 0.08 a parameter.
a.IncreaseRange(0.08);
return(a);
}
else
{
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
return(data.SuggestYAxis());
}
}
public void CreatePlot(InteractivePlotSurface2D plotSurface)
{
plotSurface.Clear();
System.Random r = new Random();
int len = 35;
double[] a = new double[len];
double[] b = new double[len];
for (int i = 0; i < len; ++i)
{
int j = len - 1 - i;
a[i] = (double)Math.Exp(-(double)(i - len / 2) * (double)(i - len / 2) / 50.0f);
b[i] = a[i] + (r.Next(10) / 50.0f) - 0.05f;
if (b[i] < 0.0f)
{
b[i] = 0;
}
}
HistogramPlot sp = new HistogramPlot();
sp.DataSource = b;
sp.Pen = Pens.DarkBlue;
sp.Filled = true;
sp.RectangleBrush = new RectangleBrushes.HorizontalCenterFade(Color.Lavender, Color.Gold);
sp.BaseWidth = 0.5f;
sp.Label = "Random Data";
LinePlot lp = new LinePlot();
lp.DataSource = a;
lp.Pen = new Pen(Color.Blue, 3.0f);
lp.Label = "Gaussian Function";
plotSurface.Add(sp);
plotSurface.Add(lp);
plotSurface.Legend = new Legend();
plotSurface.YAxis1.WorldMin = 0.0f;
plotSurface.Title = "Histogram Plot";
plotSurface.Refresh();
}
/// <summary>
/// Stack the histogram to another HistogramPlot.
/// </summary>
public void StackedTo(HistogramPlot hp)
{
SequenceAdapter data =
new SequenceAdapter( this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData );
SequenceAdapter hpData =
new SequenceAdapter( hp.DataSource, hp.DataMember, hp.OrdinateData, hp.AbscissaData );
if ( hp != null )
{
isStacked_ = true;
if ( hpData.Count != data.Count )
{
throw new FlorenceException("Can stack HistogramPlot data only with the same number of datapoints.");
}
for ( int i=0; i < data.Count; ++i )
{
if ( data[i].X != hpData[i].X )
{
throw new FlorenceException("Can stack HistogramPlot data only with the same X coordinates.");
}
if ( hpData[i].Y < 0.0f)
{
throw new FlorenceException("Can stack HistogramPlot data only with positive Y coordinates.");
}
}
}
stackedTo_ = hp;
}
public void CreatePlot(InteractivePlotSurface2D plotSurface)
{
plotSurface.Clear();
Grid mygrid = new Grid();
mygrid.VerticalGridType = Grid.GridType.Coarse;
Pen majorGridPen = new Pen( Color.LightGray );
float[] pattern = { 1.0f, 2.0f };
majorGridPen.DashPattern = pattern;
mygrid.MajorGridPen = majorGridPen;
plotSurface.Add( mygrid );
float[] xs = {20.0f, 31.0f, 27.0f, 38.0f, 24.0f, 3.0f, 2.0f };
float[] xs2 = {7.0f, 10.0f, 42.0f, 9.0f, 2.0f, 79.0f, 70.0f };
float[] xs3 = {1.0f, 20.0f, 20.0f, 25.0f, 10.0f, 30.0f, 30.0f };
HistogramPlot hp = new HistogramPlot();
hp.DataSource = xs;
hp.BaseWidth = 0.6f;
hp.RectangleBrush =
new RectangleBrushes.HorizontalCenterFade( Color.FromArgb(255,255,200), Color.White );
hp.Filled = true;
hp.Label = "Developer Work";
HistogramPlot hp2 = new HistogramPlot();
hp2.DataSource = xs2;
hp2.Label = "Web Browsing";
hp2.RectangleBrush = RectangleBrushes.Horizontal.FaintGreenFade;
hp2.Filled = true;
hp2.StackedTo( hp );
HistogramPlot hp3 = new HistogramPlot();
hp3.DataSource = xs3;
hp3.Label = "P2P Downloads";
hp3.RectangleBrush = RectangleBrushes.Vertical.FaintBlueFade;
hp3.Filled = true;
hp3.StackedTo( hp2 );
plotSurface.Add( hp );
plotSurface.Add( hp2 );
plotSurface.Add( hp3 );
plotSurface.Legend = new Legend();
LabelAxis la = new LabelAxis( plotSurface.XAxis1 );
la.AddLabel( "Monday", 0.0f );
la.AddLabel( "Tuesday", 1.0f );
la.AddLabel( "Wednesday", 2.0f );
la.AddLabel( "Thursday", 3.0f );
la.AddLabel( "Friday", 4.0f );
la.AddLabel( "Saturday", 5.0f );
la.AddLabel( "Sunday", 6.0f );
la.Label = "Days";
la.TickTextFont = new Font( "Courier New", 8 );
la.TicksBetweenText = true;
plotSurface.XAxis1 = la;
plotSurface.YAxis1.WorldMin = 0.0;
plotSurface.YAxis1.Label = "MBytes";
((LinearAxis)plotSurface.YAxis1).NumberOfSmallTicks = 1;
plotSurface.Title = "Internet useage for user:\n johnc 09/01/03 - 09/07/03";
plotSurface.XAxis1.TicksLabelAngle = 30.0f;
plotSurface.PlotBackBrush = RectangleBrushes.Vertical.FaintRedFade;
plotSurface.Refresh();
}
/// <summary>
/// Renders the histogram.
/// </summary>
/// <param name="g">The Graphics surface on which to draw</param>
/// <param name="xAxis">The X-Axis to draw against.</param>
/// <param name="yAxis">The Y-Axis to draw against.</param>
public void Draw(Graphics g, PhysicalAxis xAxis, PhysicalAxis yAxis)
{
SequenceAdapter data =
new SequenceAdapter(this.DataSource, this.DataMember, this.OrdinateData, this.AbscissaData);
float yoff;
for (int i = 0; i < data.Count; ++i)
{
// (1) determine the top left hand point of the bar (assuming not centered)
PointD p1 = data[i];
if (double.IsNaN(p1.X) || double.IsNaN(p1.Y))
{
continue;
}
// (2) determine the top right hand point of the bar (assuming not centered)
PointD p2;
if (i + 1 != data.Count)
{
p2 = data[i + 1];
if (double.IsNaN(p2.X) || double.IsNaN(p2.Y))
{
continue;
}
p2.Y = p1.Y;
}
else if (i != 0)
{
p2 = data[i - 1];
if (double.IsNaN(p2.X) || double.IsNaN(p2.Y))
{
continue;
}
double offset = p1.X - p2.X;
p2.X = p1.X + offset;
p2.Y = p1.Y;
}
else
{
double offset = 1.0f;
p2.X = p1.X + offset;
p2.Y = p1.Y;
}
// (3) now account for plots this may be stacked on top of.
HistogramPlot currentPlot = this;
yoff = 0.0f;
double yval = 0.0f;
while (currentPlot.isStacked_)
{
SequenceAdapter stackedToData = new SequenceAdapter(
currentPlot.stackedTo_.DataSource,
currentPlot.stackedTo_.DataMember,
currentPlot.stackedTo_.OrdinateData,
currentPlot.stackedTo_.AbscissaData);
yval += stackedToData[i].Y;
yoff = yAxis.WorldToPhysical(yval, false).Y;
p1.Y += stackedToData[i].Y;
p2.Y += stackedToData[i].Y;
currentPlot = currentPlot.stackedTo_;
}
// (4) now account for centering
if (center_)
{
double offset = (p2.X - p1.X) / 2.0f;
p1.X -= offset;
p2.X -= offset;
}
// (5) now account for BaseOffset (shift of bar sideways).
p1.X += baseOffset_;
p2.X += baseOffset_;
// (6) now get physical coordinates of top two points.
PointF xPos1 = xAxis.WorldToPhysical(p1.X, false);
PointF yPos1 = yAxis.WorldToPhysical(p1.Y, false);
PointF xPos2 = xAxis.WorldToPhysical(p2.X, false);
PointF yPos2 = yAxis.WorldToPhysical(p2.Y, false);
if (isStacked_)
{
currentPlot = this;
while (currentPlot.isStacked_)
{
currentPlot = currentPlot.stackedTo_;
}
this.baseWidth_ = currentPlot.baseWidth_;
}
float width = xPos2.X - xPos1.X;
float height;
if (isStacked_)
{
height = -yPos1.Y + yoff;
}
else
{
height = -yPos1.Y + yAxis.PhysicalMin.Y;
}
float xoff = (1.0f - baseWidth_) / 2.0f * width;
RectangleF r = new RectangleF(xPos1.X + xoff, yPos1.Y, width - 2 * xoff, height);
if (this.Filled)
{
if (r.Height != 0 && r.Width != 0)
{
// room for optimization maybe.
g.FillRectangle(rectangleBrush_.Get(r), r);
}
}
g.DrawRectangle(Pen, r.X, r.Y, r.Width, r.Height);
}
}
