double UpdateSegment(double start, double end, RulerSegment rulerSegment, double run, ref double trans)
{
double segmentWidth = _segmentWidth;
if (run == start)
{
rulerSegment.StartValue = (Math.Floor((double)(start / segmentWidth)) * segmentWidth) / Scale;
run = rulerSegment.StartValue * Scale;
}
else if (run <= end)
{
rulerSegment.StartValue = run / Scale;
}
rulerSegment.SegmentWidth = segmentWidth;
if (Orientation == Orientation.Horizontal)
{
rulerSegment._mTranslateTransform.X = trans;
}
else
{
rulerSegment._mTranslateTransform.Y = trans;
}
trans += rulerSegment.PxSegmentWidth;
run += segmentWidth;
return(run);
}
void UpdateSegments(double start, double end)
{
double run = start;
double trans = 0.0;
foreach (RulerSegment segment in _canvas.Children)
{
run = UpdateSegment(start, end, segment, run, ref trans);
}
while (run < end)
{
RulerSegment newSegment = new RulerSegment();
newSegment.Ruler = this;
_canvas.Children.Add(newSegment);
run = UpdateSegment(start, end, newSegment, run, ref trans);
}
}
