/// <summary>
/// Gets the distance position of the entity preceeding a given point. If the point
/// is in between entities the starting point of the matching entity
/// is returned.
/// </summary>
/// <param name="point">The point.</param>
/// <returns>The distance position.</returns>
public double GetPreviousScrollValue(double point)
{
double offset = trackDCC.GetCumulatedDistanceAt(start);
double d = trackDCC.GetPreviousScrollValue(point + offset);
if (double.IsNaN(d) || d < offset || d - offset > TotalDistance)
{
return(double.NaN);
}
return(d - offset);
}
/// <summary>
/// Gets the distance position of the entity preceeding a given point. If the point
/// is in between entities the starting point of the matching entity
/// is returned.
/// </summary>
/// <param name="point">The point.</param>
/// <returns>The distance position.</returns>
public double GetPreviousScrollValue(double point)
{
int index = IndexOfCumulatedDistance(point);
double nestedStart = GetCumulatedDistanceAt(index);
double delta = point - nestedStart;
if (delta > 0)
{
IDistanceCounterCollection nestedDcc = GetNestedDistances(index);
if (nestedDcc != null)
{
double r = nestedDcc.GetPreviousScrollValue(delta);
if (!double.IsNaN(r) && r >= 0 && r < nestedDcc.TotalDistance)
{
return(nestedStart + r);
}
}
return(GetCumulatedDistanceAt(index));
}
index = GetPreviousVisibleIndex(index);
if (index >= 0 && index < Count)
{
nestedStart = GetCumulatedDistanceAt(index);
IDistanceCounterCollection nestedDcc = GetNestedDistances(index);
if (nestedDcc != null)
{
//WPF-29115 - We have set the DetailsViewPadding, the TotalDistance is calculated based in padding,
//but we have calculated the index divided the TotalDistance by DefalultLine size so index should be wrong.
//So before processing the calculation minus the paddingDistance.
delta = nestedDcc.TotalDistance - (nestedDcc as DistanceRangeCounterCollection).paddingDistance;
double r = nestedDcc.GetPreviousScrollValue(delta);
if (!double.IsNaN(r) && r >= 0 && r < nestedDcc.TotalDistance)
{
return(nestedStart + r);
}
}
return(nestedStart);
}
return(double.NaN);
}
/// <summary>
/// Gets the distance position of the entity preceeding a given point. If the point
/// is in between entities the starting point of the matching entity
/// is returned.
/// </summary>
/// <param name="point">The point.</param>
/// <returns>The distance position.</returns>
public double GetPreviousScrollValue(double point)
{
int index = IndexOfCumulatedDistance(point);
double nestedStart = GetCumulatedDistanceAt(index);
double delta = point - nestedStart;
if (delta > 0)
{
IDistanceCounterCollection nestedDcc = GetNestedDistances(index);
if (nestedDcc != null)
{
double r = nestedDcc.GetPreviousScrollValue(delta);
if (!double.IsNaN(r) && r >= 0 && r < nestedDcc.TotalDistance)
{
return(nestedStart + r);
}
}
return(GetCumulatedDistanceAt(index));
}
index = GetPreviousVisibleIndex(index);
if (index >= 0 && index < Count)
{
nestedStart = GetCumulatedDistanceAt(index);
IDistanceCounterCollection nestedDcc = GetNestedDistances(index);
if (nestedDcc != null)
{
delta = nestedDcc.TotalDistance;
double r = nestedDcc.GetPreviousScrollValue(delta);
if (!double.IsNaN(r) && r >= 0 && r < nestedDcc.TotalDistance)
{
return(nestedStart + r);
}
}
return(nestedStart);
}
return(double.NaN);
}