public static bool EqualEps(Range <double> first, Range <double> second, double eps)
{
double delta = Math.Min(first.GetLength(), second.GetLength());
return(Math.Abs(first.Min - second.Min) < eps * delta &&
Math.Abs(first.Max - second.Max) < eps * delta);
}
internal void UpdateUI()
{
if (range.IsEmpty)
{
return;
}
if (transform == null)
{
return;
}
if (independent)
{
InitTransform(RenderSize);
}
bool isHorizontal = Placement == AxisPlacement.Bottom || Placement == AxisPlacement.Top;
if (transform.ScreenRect.Width == 0 && isHorizontal ||
transform.ScreenRect.Height == 0 && !isHorizontal)
{
return;
}
if (!IsMeasureValid)
{
InvalidateMeasure();
}
Range <double> currentDoubleRange = new Range <double>(convertToDouble(range.Min), convertToDouble(range.Max));
bool sameLength = Math.Abs(cachedPartLength - currentDoubleRange.GetLength()) / cachedPartLength < 0.01 || cachedPartLength == 0;
if (UseSmoothPanning && sameLength)
{
Debug.WriteLine(Placement + " " + range + " " + axisLongRange);
// current range is included into axisLongRange
if (currentDoubleRange < axisLongRange)
{
var axisContent = (FrameworkElement)mainGrid.Children[0];
double leftScreen;
if (placement.IsBottomOrTop())
{
leftScreen = ((axisLongRange.Min - currentDoubleRange.Min) / currentDoubleRange.GetLength() + 1) * getSize(transform.ScreenRect.Size);
}
else
{
leftScreen = -((axisLongRange.Min - currentDoubleRange.Min) / currentDoubleRange.GetLength() + 1) * getSize(transform.ScreenRect.Size);
}
StackCanvas.SetCoordinate(axisContent, leftScreen);
// this call should be commented
// double rightScreen = ((axisLongRange.Max - currentDoubleRange.Max) / currentDoubleRange.GetLength() + 1) * getSize(transform.ScreenRect.Size);
// StackCanvas.SetEndCoordinate(axisContent, rightScreen);
}
else
{
double length = currentDoubleRange.GetLength();
cachedPartLength = length;
// cached axis part is three times longer
double min = currentDoubleRange.Min - length;
double max = currentDoubleRange.Max + length;
Range <T> widerRange = new Range <T>(convertFromDouble(min), convertFromDouble(max));
axisLongRange = new Range <double>(min, max);
// rebuild entire ticks
FillParts(widerRange);
Debug.WriteLine("не шире " + Placement + " " + widerRange);
originalScreenTicks = screenTicks.ToArray();
}
// updating screen ticks (for axis grid)
// 3 is a ratio of cached area to visible area
double shift = (currentDoubleRange.Min - (axisLongRange.Min + axisLongRange.GetLength() / 3)) * getSize(transform.ScreenRect.Size);
if (!placement.IsBottomOrTop())
{
shift *= -1;
}
screenTicks = originalScreenTicks.ToArray();
for (int i = 0; i < originalScreenTicks.Length; i++)
{
screenTicks[i] -= shift;
}
}
else
{
FillParts(range);
}
ScreenTicksChanged.Raise(this);
}
