public GraphControl()
{
mTraceBoxes = new List<TracingBox>();
mPointTrans = new PointTranslater()
{
ZoomX = ZOOM_DEFAULT,
ZoomY = ZOOM_DEFAULT
};
}
internal void Draw(DrawingContext dc, PointTranslater pt,
GraphDrawingOptions op)
{
IPlotDataSource plotData = PlotData;
if (plotData == null)
return;
double plotDataBegin = plotData.GetSegmentBegin();
double plotDataEnd = plotData.GetSegmentEnd();
double from = Math.Max(Math.Max(op.From, SegmentBegin), plotDataBegin);
double to = Math.Min(Math.Min(op.To, SegmentEnd), plotDataEnd);
if (from >= to)
return;
//plotData.SetZoom(pt.Zoom);
plotData.SetSegment(from, to);
var pointsToDraw = plotData.GetPoints();
if (pointsToDraw == null)
return;
if (pointsToDraw.Count <= 1)
return;
var graphPen = new Pen(StrokeBrush, StrokeThickness);
int startIndex = plotData.GetStartIndex();
if (startIndex < 0)
return;
Rect rect = op.GraphRect;
rect.X = pt.TransalteX(from);
rect.Width = pt.TransalteX(to) - rect.X;
Point next = pt.Translate(pointsToDraw[startIndex]);
Point boundPoint;
if (IsInterpolationEnabled)
boundPoint = plotData.Interpolate(from);
else
boundPoint = pointsToDraw[startIndex];
boundPoint = pt.Translate(boundPoint);
if (IsInterpolationEnabled)
dc.DrawLine(graphPen, boundPoint, next);
if (rect.Left > op.GraphRect.Left)
{
dc.DrawEllipse(StrokeBrush, null, boundPoint,
BOUND_POINT_RADOUS, BOUND_POINT_RADOUS);
}
int endIndex = plotData.GetEndIndex();
for (int i = startIndex; i <= endIndex; i++)
{
Point prev = next;
next = pt.Translate(pointsToDraw[i]);
if (!(rect.Contains(prev) || rect.Contains(next)))
continue;
dc.DrawLine(graphPen, prev, next);
}
if (IsInterpolationEnabled)
boundPoint = plotData.Interpolate(to);
else
boundPoint = pointsToDraw[endIndex];
boundPoint = pt.Translate(boundPoint);
if (IsInterpolationEnabled)
dc.DrawLine(graphPen, next, boundPoint);
if (rect.Right < op.GraphRect.Right)
{
dc.DrawEllipse(StrokeBrush, null, boundPoint,
BOUND_POINT_RADOUS, BOUND_POINT_RADOUS);
}
}
