public ChartCanvas(RectangleF rect)
: base(rect)
{
ContentMode = UIViewContentMode.Redraw;
this.AutoresizingMask = UIViewAutoresizing.All;
this.BackColor = Color.Wheat;
PlotPanel = new PlotPanel(rect);
this.AddSubview(PlotPanel);
// Subscribing to a paint eventhandler to drawingPanel:
PlotPanel.Paint +=
new PaintEventHandler(PlotPanelPaint);
cs = new ChartStyle(this);
dc = new DataCollection();
cm = new ColorMap(100, 180);
// Specify chart style parameters:
cs.Title = "Bar Chart";
cs.XLimMin = 0f;
cs.XLimMax = 5f;
cs.YLimMin = 0f;
cs.YLimMax = 10f;
cs.XTick = 1f;
cs.YTick = 2f;
cs.BarType = ChartStyle.BarTypeEnum.Vertical;
}
public void AddBars(Graphics g, ChartStyle cs, int numberOfDataSeries, int numberOfPoints)
{
// Draw bars:
var temp = new ArrayList ();
float[] tempy = new float[numberOfPoints];
var temppt = new CGPoint ();
int n = 0;
foreach (DataSeries ds in DataSeriesList) {
var aPen = new Pen (ds.BarStyle.BorderColor, ds.BarStyle.BorderThickness);
var aBrush = new SolidBrush (ds.BarStyle.FillColor);
aPen.DashStyle = ds.BarStyle.BorderPattern;
var pts = new PointF[4];
CGPoint pt;
float width;
if (cs.BarType == ChartStyle.BarTypeEnum.Vertical) {
if (numberOfDataSeries == 1) {
// Find the minumum and maximum y values:
float ymin = 0;
float ymax = 0;
for (int i = 0; i < ds.PointList.Count; i++) {
pt = (CGPoint)ds.PointList[i];
ymin = (float)Math.Min (ymin, pt.Y);
ymax = (float)Math.Max (ymax, pt.Y);
}
width = cs.XTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++) {
pt = (CGPoint)ds.PointList[i];
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D (new CGPoint (x - width / 2, 0));
pts[1] = cs.Point2D (new CGPoint (x + width / 2, 0));
pts[2] = cs.Point2D (new CGPoint (x + width / 2, pt.Y));
pts[3] = cs.Point2D (new CGPoint (x - width / 2, pt.Y));
if (ds.IsSingleColorMap) {
DrawColorMap (g, pts, ds.CMap, ymin, ymax, (float)pt.Y);
} else if (ds.IsColorMap) {
float dy = (ymax - ymin) / 100;
var points = new PointF[4];
for (int j = 0; j <= (int)Math.Round(100 * (pt.Y - ymin) / (ymax - ymin)); j++) {
points[0] = cs.Point2D (new CGPoint (x - width / 2, (j - 1) * dy));
points[1] = cs.Point2D (new CGPoint (x + width / 2, (j - 1) * dy));
points[2] = cs.Point2D (new CGPoint (x + width / 2, j * dy));
points[3] = cs.Point2D (new CGPoint (x - width / 2, j * dy));
DrawColorMap (g, points, ds.CMap, ymin, ymax, j * dy);
}
} else {
g.FillPolygon (aBrush, pts);
}
g.DrawPolygon (aPen, pts);
}
} else if (numberOfDataSeries > 1) {
width = 0.7f * cs.XTick;
for (int i = 0; i < ds.PointList.Count; i++) {
pt = (CGPoint)ds.PointList[i];
float w1 = width / numberOfDataSeries;
float w = ds.BarStyle.BarWidth * w1;
float space = (w1 - w) / 2;
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D (new CGPoint (
x - width / 2 + space + n * w1, 0));
pts[1] = cs.Point2D (new CGPoint (
x - width / 2 + space + n * w1 + w, 0));
pts[2] = cs.Point2D (new CGPoint (
x - width / 2 + space + n * w1 + w, pt.Y));
pts[3] = cs.Point2D (new CGPoint (
x - width / 2 + space + n * w1, pt.Y));
g.FillPolygon (aBrush, pts);
g.DrawPolygon (aPen, pts);
}
}
}
else if (cs.BarType == ChartStyle.BarTypeEnum.VerticalOverlay && numberOfDataSeries > 1) {
width = cs.XTick * ds.BarStyle.BarWidth;
width = width / (float)Math.Pow(2, n);
for (int i = 0; i < ds.PointList.Count; i++) {
pt = (CGPoint)ds.PointList[i];
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D (new CGPoint(x - width / 2, 0));
pts[1] = cs.Point2D (new CGPoint(x + width / 2, 0));
pts[2] = cs.Point2D (new CGPoint(x + width / 2, pt.Y));
pts[3] = cs.Point2D (new CGPoint(x - width / 2, pt.Y));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
} else if (cs.BarType == ChartStyle.BarTypeEnum.VerticalStack && numberOfDataSeries > 1) {
width = cs.XTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++) {
pt = (CGPoint)ds.PointList[i];
if (temp.Count > 0)
tempy[i] = (float)(tempy[i] + ((CGPoint)temp[i]).Y);
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D (new CGPoint (x - width / 2, 0 + tempy[i]));
pts[1] = cs.Point2D (new CGPoint (x + width / 2, 0 + tempy[i]));
pts[2] = cs.Point2D (new CGPoint (x + width / 2, pt.Y + tempy[i]));
pts[3] = cs.Point2D (new CGPoint (x - width / 2, pt.Y + tempy[i]));
g.FillPolygon (aBrush, pts);
g.DrawPolygon (aPen, pts);
}
temp = ds.PointList;
} else if (cs.BarType == ChartStyle.BarTypeEnum.Horizontal) {
if (numberOfDataSeries == 1) {
width = cs.YTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++) {
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D (new CGPoint (0, y - width / 2));
pts[1] = cs.Point2D (new CGPoint (0, y + width / 2));
pts[2] = cs.Point2D (new CGPoint (pt.X, y + width / 2));
pts[3] = cs.Point2D (new CGPoint (pt.X, y - width / 2));
g.FillPolygon (aBrush, pts);
g.DrawPolygon (aPen, pts);
}
} else if (numberOfDataSeries > 1) {
width = 0.7f * cs.YTick;
for (int i = 0; i < ds.PointList.Count; i++) {
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
float w1 = width / numberOfDataSeries;
float w = ds.BarStyle.BarWidth * w1;
float space = (w1 - w) / 2;
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D (new CGPoint (0,
y - width / 2 + space + n * w1));
pts[1] = cs.Point2D (new CGPoint (0,
y - width / 2 + space + n * w1 + w));
pts[2] = cs.Point2D (new CGPoint (pt.X,
y - width / 2 + space + n * w1 + w));
pts[3] = cs.Point2D (new CGPoint (pt.X,
y - width / 2 + space + n * w1));
g.FillPolygon (aBrush, pts);
g.DrawPolygon (aPen, pts);
}
}
} else if (cs.BarType == ChartStyle.BarTypeEnum.HorizontalOverlay && numberOfDataSeries > 1) {
width = cs.YTick * ds.BarStyle.BarWidth;
width = width / (float)Math.Pow(2, n);
for (int i = 0; i < ds.PointList.Count; i++) {
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D (new CGPoint (0, y - width / 2));
pts[1] = cs.Point2D (new CGPoint (0, y + width / 2));
pts[2] = cs.Point2D (new CGPoint (pt.X, y + width / 2));
pts[3] = cs.Point2D (new CGPoint (pt.X, y - width / 2));
g.FillPolygon (aBrush, pts);
g.DrawPolygon (aPen, pts);
}
} else if (cs.BarType == ChartStyle.BarTypeEnum.HorizontalStack && numberOfDataSeries > 1) {
width = cs.YTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++)
{
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
if (temp.Count > 0) {
temppt = (CGPoint)temp[i];
tempy[i] = (float)(tempy[i] + temppt.Y);
}
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D (new CGPoint (0 + tempy[i], y - width / 2));
pts[1] = cs.Point2D (new CGPoint (0 + tempy[i], y + width / 2));
pts[2] = cs.Point2D (new CGPoint (pt.X + tempy[i], y + width / 2));
pts[3] = cs.Point2D (new CGPoint (pt.X + tempy[i], y - width / 2));
g.FillPolygon (aBrush, pts);
g.DrawPolygon (aPen, pts);
}
temp = ds.PointList;
}
n++;
aPen.Dispose ();
}
}
public void AddBars(Graphics g, ChartStyle cs, int numberOfDataSeries, int numberOfPoints)
{
// Draw bars:
var temp = new ArrayList();
float[] tempy = new float[numberOfPoints];
var temppt = new CGPoint();
int n = 0;
foreach (DataSeries ds in DataSeriesList)
{
var aPen = new Pen(ds.BarStyle.BorderColor, ds.BarStyle.BorderThickness);
var aBrush = new SolidBrush(ds.BarStyle.FillColor);
aPen.DashStyle = ds.BarStyle.BorderPattern;
var pts = new PointF[4];
CGPoint pt;
float width;
if (cs.BarType == ChartStyle.BarTypeEnum.Vertical)
{
if (numberOfDataSeries == 1)
{
// Find the minumum and maximum y values:
float ymin = 0;
float ymax = 0;
for (int i = 0; i < ds.PointList.Count; i++)
{
pt = (CGPoint)ds.PointList[i];
ymin = (float)Math.Min(ymin, pt.Y);
ymax = (float)Math.Max(ymax, pt.Y);
}
width = cs.XTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++)
{
pt = (CGPoint)ds.PointList[i];
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D(new CGPoint(x - width / 2, 0));
pts[1] = cs.Point2D(new CGPoint(x + width / 2, 0));
pts[2] = cs.Point2D(new CGPoint(x + width / 2, pt.Y));
pts[3] = cs.Point2D(new CGPoint(x - width / 2, pt.Y));
if (ds.IsSingleColorMap)
{
DrawColorMap(g, pts, ds.CMap, ymin, ymax, (float)pt.Y);
}
else if (ds.IsColorMap)
{
float dy = (ymax - ymin) / 100;
var points = new PointF[4];
for (int j = 0; j <= (int)Math.Round(100 * (pt.Y - ymin) / (ymax - ymin)); j++)
{
points[0] = cs.Point2D(new CGPoint(x - width / 2, (j - 1) * dy));
points[1] = cs.Point2D(new CGPoint(x + width / 2, (j - 1) * dy));
points[2] = cs.Point2D(new CGPoint(x + width / 2, j * dy));
points[3] = cs.Point2D(new CGPoint(x - width / 2, j * dy));
DrawColorMap(g, points, ds.CMap, ymin, ymax, j * dy);
}
}
else
{
g.FillPolygon(aBrush, pts);
}
g.DrawPolygon(aPen, pts);
}
}
else if (numberOfDataSeries > 1)
{
width = 0.7f * cs.XTick;
for (int i = 0; i < ds.PointList.Count; i++)
{
pt = (CGPoint)ds.PointList[i];
float w1 = width / numberOfDataSeries;
float w = ds.BarStyle.BarWidth * w1;
float space = (w1 - w) / 2;
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D(new CGPoint(
x - width / 2 + space + n * w1, 0));
pts[1] = cs.Point2D(new CGPoint(
x - width / 2 + space + n * w1 + w, 0));
pts[2] = cs.Point2D(new CGPoint(
x - width / 2 + space + n * w1 + w, pt.Y));
pts[3] = cs.Point2D(new CGPoint(
x - width / 2 + space + n * w1, pt.Y));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
}
}
else if (cs.BarType == ChartStyle.BarTypeEnum.VerticalOverlay && numberOfDataSeries > 1)
{
width = cs.XTick * ds.BarStyle.BarWidth;
width = width / (float)Math.Pow(2, n);
for (int i = 0; i < ds.PointList.Count; i++)
{
pt = (CGPoint)ds.PointList[i];
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D(new CGPoint(x - width / 2, 0));
pts[1] = cs.Point2D(new CGPoint(x + width / 2, 0));
pts[2] = cs.Point2D(new CGPoint(x + width / 2, pt.Y));
pts[3] = cs.Point2D(new CGPoint(x - width / 2, pt.Y));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
}
else if (cs.BarType == ChartStyle.BarTypeEnum.VerticalStack && numberOfDataSeries > 1)
{
width = cs.XTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++)
{
pt = (CGPoint)ds.PointList[i];
if (temp.Count > 0)
{
tempy[i] = (float)(tempy[i] + ((CGPoint)temp[i]).Y);
}
var x = (float)(pt.X - cs.XTick / 2);
pts[0] = cs.Point2D(new CGPoint(x - width / 2, 0 + tempy[i]));
pts[1] = cs.Point2D(new CGPoint(x + width / 2, 0 + tempy[i]));
pts[2] = cs.Point2D(new CGPoint(x + width / 2, pt.Y + tempy[i]));
pts[3] = cs.Point2D(new CGPoint(x - width / 2, pt.Y + tempy[i]));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
temp = ds.PointList;
}
else if (cs.BarType == ChartStyle.BarTypeEnum.Horizontal)
{
if (numberOfDataSeries == 1)
{
width = cs.YTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++)
{
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D(new CGPoint(0, y - width / 2));
pts[1] = cs.Point2D(new CGPoint(0, y + width / 2));
pts[2] = cs.Point2D(new CGPoint(pt.X, y + width / 2));
pts[3] = cs.Point2D(new CGPoint(pt.X, y - width / 2));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
}
else if (numberOfDataSeries > 1)
{
width = 0.7f * cs.YTick;
for (int i = 0; i < ds.PointList.Count; i++)
{
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
float w1 = width / numberOfDataSeries;
float w = ds.BarStyle.BarWidth * w1;
float space = (w1 - w) / 2;
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D(new CGPoint(0,
y - width / 2 + space + n * w1));
pts[1] = cs.Point2D(new CGPoint(0,
y - width / 2 + space + n * w1 + w));
pts[2] = cs.Point2D(new CGPoint(pt.X,
y - width / 2 + space + n * w1 + w));
pts[3] = cs.Point2D(new CGPoint(pt.X,
y - width / 2 + space + n * w1));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
}
}
else if (cs.BarType == ChartStyle.BarTypeEnum.HorizontalOverlay && numberOfDataSeries > 1)
{
width = cs.YTick * ds.BarStyle.BarWidth;
width = width / (float)Math.Pow(2, n);
for (int i = 0; i < ds.PointList.Count; i++)
{
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D(new CGPoint(0, y - width / 2));
pts[1] = cs.Point2D(new CGPoint(0, y + width / 2));
pts[2] = cs.Point2D(new CGPoint(pt.X, y + width / 2));
pts[3] = cs.Point2D(new CGPoint(pt.X, y - width / 2));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
}
else if (cs.BarType == ChartStyle.BarTypeEnum.HorizontalStack && numberOfDataSeries > 1)
{
width = cs.YTick * ds.BarStyle.BarWidth;
for (int i = 0; i < ds.PointList.Count; i++)
{
temppt = (CGPoint)ds.PointList[i];
pt = new CGPoint(temppt.Y, temppt.X);
if (temp.Count > 0)
{
temppt = (CGPoint)temp[i];
tempy[i] = (float)(tempy[i] + temppt.Y);
}
var y = (float)(pt.Y - cs.YTick / 2);
pts[0] = cs.Point2D(new CGPoint(0 + tempy[i], y - width / 2));
pts[1] = cs.Point2D(new CGPoint(0 + tempy[i], y + width / 2));
pts[2] = cs.Point2D(new CGPoint(pt.X + tempy[i], y + width / 2));
pts[3] = cs.Point2D(new CGPoint(pt.X + tempy[i], y - width / 2));
g.FillPolygon(aBrush, pts);
g.DrawPolygon(aPen, pts);
}
temp = ds.PointList;
}
n++;
aPen.Dispose();
}
}