/// <summary>
/// Chart Paint event handler.
/// </summary>
private void Chart_PostPaint(object sender, Dundas.Charting.WebControl.ChartPaintEventArgs e)
{
if (sender is ChartArea)
{
ChartArea area = (ChartArea)sender;
// call the paint method.
if (ChartAreas.IndexOf(area.Name) >= 0 && enabled)
{
PaintDataTable(sender, e);
}
}
}
protected void Chart1_PostPaint(object sender, Dundas.Charting.WebControl.ChartPaintEventArgs e)
{
if (sender is ChartArea)
{
Series series = Chart1.Series["Tasks"];
// Take Graphics object from chart
Graphics graph = e.ChartGraphics.Graphics;
if (_dataTable == null)
{
return;
}
for (int i = 0; i < _dataTable.Rows.Count; i++)
{
DataRow row = _dataTable.Rows[i];
DataPoint chdObj = GetSeriesPoint(row["TASK_REF_ID"]);
DataPoint obj = GetSeriesPoint(row["AFTER_TASK_REF_ID"]);
if (obj != null && chdObj != null)
{
double p1X, p2X, p1Y, p2Y;
p1X = obj.XValue;
p2X = chdObj.XValue;
p1Y = obj.YValues[1];
p2Y = chdObj.YValues[0];
if ((i + 1) <= series.Points.Count && i != 0)
{
float pixelX1 = (float)e.ChartGraphics.GetPositionFromAxis("Default", AxisName.Y, p1Y);
float pixelY1 = (float)e.ChartGraphics.GetPositionFromAxis("Default", AxisName.X, p1X);
float pixelX2 = (float)e.ChartGraphics.GetPositionFromAxis("Default", AxisName.Y, p2Y);
float pixelY2 = (float)e.ChartGraphics.GetPositionFromAxis("Default", AxisName.X, p2X);
PointF point1 = PointF.Empty;
PointF point2 = PointF.Empty;
PointF point3 = PointF.Empty;
point1.X = pixelX1;
point1.Y = pixelY1;
point2.X = pixelX2;
point2.Y = pixelY2;
// make the middle right-angle point
point3.X = pixelX2;
point3.Y = pixelY1;
// Convert relative coordinates to absolute coordinates.
point1 = e.ChartGraphics.GetAbsolutePoint(point1);
point2 = e.ChartGraphics.GetAbsolutePoint(point2);
point3 = e.ChartGraphics.GetAbsolutePoint(point3);
// Draw connection line
graph.DrawLine(new Pen(Color.Black, 1), point1, point3);
graph.DrawLine(new Pen(Color.Black, 1), point3, point2);
DrawArrow(graph, Color.Black, point2, point3, 20.5);
}
}
}
}
}
/// <summary>
/// This method does all the work for the painting of the data table.
/// </summary>
private void PaintDataTable(object sender, Dundas.Charting.WebControl.ChartPaintEventArgs e)
{
ChartArea area = (ChartArea)sender;
// get the rect of the chart area
RectangleF rect = e.ChartGraphics.GetAbsoluteRectangle(area.Position.ToRectangleF());
// get the inner plot position
ElementPosition elemPos = area.InnerPlotPosition;
// find the coordinates of the inner plot position
float x = rect.X + (rect.Width / 100 * elemPos.X);
float y = rect.Y + (rect.Height / 100 * elemPos.Y);
float ChartAreaBottomY = rect.Y + rect.Height;
float width = (rect.Width / 100 * elemPos.Width);
float height = (rect.Height / 100 * elemPos.Height);
// find the height of the font that will be used
Font axisFont = area.AxisX.LabelStyle.Font;
string testString = "ForFontHeight";
SizeF axisFontSize = e.ChartGraphics.MeasureString(testString, axisFont);
// find the height of the font that will be used
Font titleFont = area.AxisX.TitleFont;
testString = area.AxisX.Title;
SizeF titleFontSize = e.ChartGraphics.MeasureString(testString, titleFont);
int seriesCount = 0;
// for each series that is attached to the chart area,
// draw some boxes around the labels in the color provided
for (int i = e.Chart.Series.Count - 1; i >= 0; i--)
{
if (area.Name == e.Chart.Series[i].ChartArea)
{
seriesCount++;
}
}
// now, if a box was actually drawn, then draw
// the verticle lines to separate the columns of the table.
if (seriesCount > 0)
{
for (int i = 0; i < e.Chart.Series.Count; i++)
{
if (area.Name == e.Chart.Series[i].ChartArea)
{
double min = area.AxisX.Minimum;
double max = area.AxisX.Maximum;
// modify the min value for the current axis view
if (area.AxisX.View.Position - 1 > min)
{
min = area.AxisX.View.Position - 1;
}
// modify the max value for the currect axis view
if ((area.AxisX.View.Position + area.AxisX.View.Size + 0.5) < max)
{
max = area.AxisX.View.Position + area.AxisX.View.Size + 0.5;
}
// find the starting point that will be display.
// this is dependent on the current axis view.
// this sample assumes the same number of points in each
// series so always take from the zeroth series
int pointIndex = 0;
foreach (DataPoint pt in ChartObj.Series[0].Points)
{
if (pt.XValue > min)
{
break;
}
pointIndex++;
}
bool TableLegendDrawn = false;
for (double AxisValue = min; AxisValue < max; AxisValue++)
{
float pixelX = (float)e.ChartGraphics.GetPositionFromAxis("Default", AxisName.X, AxisValue);
float nextPixelX = (float)e.ChartGraphics.GetPositionFromAxis("Default", AxisName.X, AxisValue + 1);
float pixelY = ChartAreaBottomY - titleFontSize.Height - (seriesCount * axisFontSize.Height);
PointF point1 = PointF.Empty;
PointF point2 = PointF.Empty;
// Set Maximum and minimum points
point1.X = pixelX;
point1.Y = 0;
// Convert relative coordinates to absolute coordinates.
point1 = e.ChartGraphics.GetAbsolutePoint(point1);
point2.X = point1.X;
point2.Y = ChartAreaBottomY - titleFontSize.Height;
point1.Y = pixelY;
// Draw connection line
e.ChartGraphics.DrawLine(new Pen(borderColor), point1, point2);
point2.X = nextPixelX;
point2.Y = 0;
point2 = e.ChartGraphics.GetAbsolutePoint(point2);
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
// for each series draw one value in the column
int row = 0;
foreach (Series ser in ChartObj.Series)
{
if (area.Name == ser.ChartArea)
{
if (!TableLegendDrawn)
{
// draw the series color box
e.ChartGraphics.FillRectangle(new SolidBrush(ser.Color),
x - 10, row * (axisFont.Height) + (point1.Y), 10, axisFontSize.Height);
e.ChartGraphics.DrawRectangle(new Pen(borderColor),
x - 10, row * (axisFont.Height) + (point1.Y), 10, axisFontSize.Height);
e.ChartGraphics.FillRectangle(new SolidBrush(tableColor),
x,
row * (axisFont.Height) + (point1.Y),
width,
axisFontSize.Height);
e.ChartGraphics.DrawRectangle(new Pen(borderColor),
x,
row * (axisFont.Height) + (point1.Y),
width,
axisFontSize.Height);
}
if (pointIndex < ser.Points.Count)
{
string label = ser.Points[pointIndex].YValues[0].ToString();
RectangleF textRect = new RectangleF(point1.X, row * (axisFont.Height) + (point1.Y + 1), point2.X - point1.X, axisFont.Height);
e.ChartGraphics.DrawString(label, axisFont, new SolidBrush(area.AxisX.LabelStyle.FontColor), textRect, format);
}
row++;
}
}
TableLegendDrawn = true;
pointIndex++;
}
// do this only once so break!
break;
}
}
}
}
