private Element LoadElement(XPathNavigator node)
{
Element element = null;
switch (node.Name)
{
case DataElement.ElementName:
_data = new DataElement(this, node);
if (_data.StartDate != null)
{
_startDate = _data.StartDate.Value;
}
element = _data;
break;
case HeadElement.ElementName:
_head = new HeadElement(this, node);
element = _head;
break;
case BodyElement.ElementName:
_body = new BodyElement(this, node);
element = _body;
break;
case CalendarElement.ElementName:
_calendar = new CalendarElement(this, node);
element = _calendar;
break;
case DayElement.ElementName:
element = new DayElement(this, node);
break;
case AxisElement.ElementName:
AxisElement axis = new AxisElement(this, node);
axis.ViewStartDate = _startDate;
_axes.Add(axis);
element = axis;
break;
case SpanElement.ElementName:
element = new SpanElement(this, node);
break;
case IntervalElement.ElementName:
element = new IntervalElement(this, node);
break;
case PointElement.ElementName:
element = new PointElement(this, node);
break;
case RelationElement.ElementName:
RelationElement relation = new RelationElement(this, node);
relation.Origin = _map[relation.OriginId];
relation.Target = _map[relation.TargetId];
element = relation;
break;
default:
element = new GanttElement(this, node);
break;
}
if (element != null)
{
AddElementToMap(element);
if (node.HasChildren)
{
foreach (XPathNavigator childNode in node.SelectChildren(XPathNodeType.Element))
{
Element childElement = LoadElement(childNode);
if (childElement != null)
{
element.AddChild(childElement);
}
}
}
}
return(element);
}
public override void RenderGanttElement(DrawingContext context, RectangleF rectangle, Brush backgroundBrush, Pen borderPen)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
// Calculate arrow size
GanttStyle style = this.Style as GanttStyle;
_arrowSize = Math.Min(style.Width, style.Height);
GanttElement originElement = _origin as GanttElement;
GanttElement targetElement = _target as GanttElement;
RectangleF origin = originElement.Rectangle;
RectangleF target = targetElement.Rectangle;
PointF originEnd = new PointF(origin.Right, Convert.ToSingle(Math.Ceiling(origin.Top - 1 + origin.Height / 2)));
PointF targetStart = new PointF(targetElement.StartX, Convert.ToSingle(Math.Ceiling(target.Top - 1 + target.Height / 2)));
PointF[] linePoints = null;
PointF[] arrowPoints = null;
bool riseY = target.Y > origin.Y;
float doubleArrowSize = _arrowSize * 2;
if (targetStart.X - originEnd.X > doubleArrowSize)
{
PointF pointer = new PointF(targetStart.X, riseY ? target.Top - 1 : target.Bottom);
// Direct arrow: 3 points
linePoints = new PointF[3]
{
originEnd,
new PointF(pointer.X, originEnd.Y),
new PointF(pointer.X, riseY ? pointer.Y - _arrowSize - 1 : pointer.Y + _arrowSize + 1)
};
arrowPoints = CreateArrow(pointer, false, riseY);
}
else
{
PointF pointer = new PointF(target.Left - 1, targetStart.Y);
// Back arrow: 6 points
float intermediateY = riseY ? origin.Bottom + 1 : origin.Top - 2;
linePoints = new PointF[6]
{
originEnd,
new PointF(originEnd.X + doubleArrowSize, originEnd.Y),
new PointF(originEnd.X + doubleArrowSize, intermediateY),
new PointF(pointer.X - doubleArrowSize - 1, intermediateY),
new PointF(pointer.X - doubleArrowSize - 1, pointer.Y),
new PointF(pointer.X - _arrowSize - 1, pointer.Y)
};
arrowPoints = CreateArrow(pointer, true, true);
}
if (linePoints != null)
{
if (borderPen != null)
{
context.Graphics.DrawLines(borderPen, linePoints);
}
}
if (arrowPoints != null)
{
if (backgroundBrush != null)
{
context.Graphics.FillPolygon(backgroundBrush, arrowPoints);
}
if (borderPen != null)
{
context.Graphics.DrawPolygon(borderPen, arrowPoints);
}
}
}
private Element LoadElement(XPathNavigator node)
{
Element element = null;
switch (node.Name)
{
case DataElement.ElementName:
_data = new DataElement(this, node);
if(_data.StartDate != null)
_startDate = _data.StartDate.Value;
element = _data;
break;
case HeadElement.ElementName:
_head = new HeadElement(this, node);
element = _head;
break;
case BodyElement.ElementName:
_body = new BodyElement(this, node);
element = _body;
break;
case CalendarElement.ElementName:
_calendar = new CalendarElement(this, node);
element = _calendar;
break;
case DayElement.ElementName:
element = new DayElement(this, node);
break;
case AxisElement.ElementName:
AxisElement axis = new AxisElement(this, node);
axis.ViewStartDate = _startDate;
_axes.Add(axis);
element = axis;
break;
case SpanElement.ElementName:
element = new SpanElement(this, node);
break;
case IntervalElement.ElementName:
element = new IntervalElement(this, node);
break;
case PointElement.ElementName:
element = new PointElement(this, node);
break;
case RelationElement.ElementName:
RelationElement relation = new RelationElement(this, node);
relation.Origin = _map[relation.OriginId];
relation.Target = _map[relation.TargetId];
element = relation;
break;
default:
element = new GanttElement(this, node);
break;
}
if (element != null)
{
AddElementToMap(element);
if (node.HasChildren)
{
foreach (XPathNavigator childNode in node.SelectChildren(XPathNodeType.Element))
{
Element childElement = LoadElement(childNode);
if (childElement != null)
element.AddChild(childElement);
}
}
}
return element;
}