public int Add(ChartItem value)
{
return(List.Add(value));
}
public void Remove(ChartItem value)
{
List.Remove(value);
}
public int IndexOf(ChartItem value)
{
return(List.IndexOf(value));
}
public bool Contains(ChartItem value)
{
return(List.Contains(value));
}
//*********************************************************************
//
// This method returns a bitmap to the calling function. This is the method
// that actually draws the pie chart and the legend with it.
//
//*********************************************************************
public override Bitmap Draw()
{
int perimeter = _perimeter;
Rectangle pieRect = new Rectangle(0, 0, perimeter, perimeter - 1);
Bitmap bmp = new Bitmap(perimeter + _legendWidth, perimeter);
Graphics grp = null;
StringFormat sf = null;
try
{
grp = Graphics.FromImage(bmp);
sf = new StringFormat();
//Paint Back ground
grp.FillRectangle(new SolidBrush(_backgroundColor), 0, 0, perimeter + _legendWidth, perimeter);
//Align text to the right
sf.Alignment = StringAlignment.Far;
//Draw all wedges and legends
for (int i = 0; i < _chartItems.Count; i++)
{
ChartItem item = (ChartItem)_chartItems[i];
SolidBrush brs = null;
try
{
brs = new SolidBrush(item.ItemColor);
grp.FillPie(brs, pieRect, item.StartPos, item.SweepSize);
grp.FillRectangle(brs, perimeter + _bufferSpace, i * _legendFontHeight + 15, 10, 10);
grp.DrawString(item.Label, new Font(_legendFontStyle, _legendFontSize),
new SolidBrush(Color.Black), perimeter + _bufferSpace + 20, i * _legendFontHeight + 13);
grp.DrawString(item.Value.ToString(), new Font(_legendFontStyle, _legendFontSize),
new SolidBrush(Color.Black), perimeter + _bufferSpace + 200, i * _legendFontHeight + 13, sf);
}
finally
{
if (brs != null)
{
brs.Dispose();
}
}
}
//draws the border around Pie
grp.DrawEllipse(new Pen(_borderColor, 2), pieRect);
//draw border around legend
grp.DrawRectangle(new Pen(_borderColor, 1), perimeter + _bufferSpace - 10, 10, 220, _chartItems.Count * _legendFontHeight + 25);
//Draw Total under legend
grp.DrawString("Total", new Font(_legendFontStyle, _legendFontSize, FontStyle.Bold),
new SolidBrush(Color.Black), perimeter + _bufferSpace + 30, (_chartItems.Count + 1) * _legendFontHeight, sf);
grp.DrawString(_total.ToString(), new Font(_legendFontStyle, _legendFontSize, FontStyle.Bold),
new SolidBrush(Color.Black), perimeter + _bufferSpace + 200, (_chartItems.Count + 1) * _legendFontHeight, sf);
grp.SmoothingMode = SmoothingMode.AntiAlias;
}
finally
{
if (sf != null)
{
sf.Dispose();
}
if (grp != null)
{
grp.Dispose();
}
}
return(bmp);
}
