protected Range GetRangeFromChildren(Axis2D axis)
{
Range range = new Range(0, 0);
Plot2DItem child;
bool rangeUpdated = false;
for (int i = 0; i < plotItems.Count; ++i)
{
child = plotItems[i];
if ((child.XAxis != axis) && (child.YAxis != axis))
continue;
Rect bounds = child.PaddedBounds;
if (bounds == Rect.Empty)
continue;
if (rangeUpdated == false)
{
range = (axis is XAxis) ? new Range(bounds.Left, bounds.Right) : new Range(bounds.Top, bounds.Bottom);
rangeUpdated = true;
}
else range = range.Union((axis is XAxis) ? new Range(bounds.Left, bounds.Right) : new Range(bounds.Top, bounds.Bottom));
}
return range;
}
private void IntervalFromRange(Range range, double minInterval, out DecomposedNumber interval, out DecomposedNumber firstTick)
{
// Exponent of the least significant figure of the interval.
int intervalExponent = (int)Math.Floor(Math.Log10(minInterval));
int intervalIntCoefficient = (int)Math.Floor(minInterval / Math.Pow(10, intervalExponent) + fractionalTolerance);
// LSF must be either 1, 2, 5 or 10, whichever is directly above the current value.
if (intervalIntCoefficient > 5) { intervalIntCoefficient = 1; intervalExponent++; }
else if (intervalIntCoefficient > 2) { intervalIntCoefficient = 5; }
else if (intervalIntCoefficient > 1) { intervalIntCoefficient = 2; }
else { intervalIntCoefficient = 1; }
//
interval = new DecomposedNumber(intervalIntCoefficient * Math.Pow(10, intervalExponent), (double)intervalIntCoefficient, intervalExponent);
//
// Now get the first tick
double firstTickValue;
double absoluteTolerance = fractionalTolerance * interval.Value;
if ((range.Min - absoluteTolerance) < 0)
{
firstTickValue = (range.Min - absoluteTolerance) - ((range.Min - absoluteTolerance) % interval.Value);
}
else
{
firstTickValue = interval.Value - ((range.Min - absoluteTolerance) % interval.Value) + (range.Min - absoluteTolerance);
}
int firstTickExp = (firstTickValue == 0) ? interval.Exponent : (int)Math.Floor(Math.Log10(Math.Abs(firstTickValue)));
firstTick = new DecomposedNumber(firstTickValue, firstTickValue / Math.Pow(10, firstTickExp), firstTickExp);
}
public Range Union(Range otherRange)
{
return new Range(Math.Min(this.Min, otherRange.Min), Math.Max(this.Max, otherRange.Max));
}
protected void LeftClickStart(object sender, MouseButtonEventArgs e)
{
foreach (Plot2DItem item in plotItems)
{
if (item is Plot2DCurve && !Double.IsNaN((item as Plot2DCurve).AnnotationPosition.X))
{
(item as Plot2DCurve).AnnotationPosition = new Point(Double.NaN, Double.NaN);
}
}
bool ctrlOrShift = Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl) ||
Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.LeftShift);
if (ctrlOrShift)
{
canvas_RightClickStart(sender, e);
return;
}
// either whole canvas or single axis
bool isSingleAxis = (sender is Axis2D);
if (e.ClickCount > 1)
{
dragging = false;
this.Cursor = Cursors.Arrow;
List <Axis2D> allAxes;
if (isSingleAxis)
{
allAxes = new List <Axis2D> {
sender as Axis2D
}
}
;
else
{
allAxes = Axes.XAxes.Concat(Axes.YAxes).ToList();
}
foreach (Axis2D axis in allAxes)
{
Range axisRange = GetRangeFromChildren(axis);
if (axisRange.Length != 0)
{
axis.SetValue(Axis2D.RangeProperty, axisRange);
}
}
}
else
{
if (isSingleAxis)
{
axesBeingDragged = new List <Axis2D> {
sender as Axis2D
}
}
;
else
{
axesBeingDragged = Axes.XAxes.Concat(Axes.YAxes).ToList();
}
StartDrag(e);
}
Canvas.CaptureMouse();
}