/// <summary>
/// Helper that transforms and scales in one go
/// </summary>
internal StylusPointCollection Reformat(StylusPointDescription subsetToReformatTo, GeneralTransform transform)
{
if (!subsetToReformatTo.IsSubsetOf(this.Description))
{
throw new ArgumentException(SR.Get(SRID.InvalidStylusPointDescriptionSubset), "subsetToReformatTo");
}
StylusPointDescription subsetToReformatToWithCurrentMetrics =
StylusPointDescription.GetCommonDescription(subsetToReformatTo,
this.Description); //preserve metrics from this spd
if (StylusPointDescription.AreCompatible(this.Description, subsetToReformatToWithCurrentMetrics) &&
(transform is Transform) && ((Transform)transform).IsIdentity)
{
//subsetToReformatTo might have different x, y, p metrics
return(this.Clone(transform, subsetToReformatToWithCurrentMetrics));
}
//
// we really need to reformat this...
//
StylusPointCollection newCollection = new StylusPointCollection(subsetToReformatToWithCurrentMetrics, this.Count);
int additionalDataCount = subsetToReformatToWithCurrentMetrics.GetExpectedAdditionalDataCount();
ReadOnlyCollection <StylusPointPropertyInfo> properties
= subsetToReformatToWithCurrentMetrics.GetStylusPointProperties();
bool isIdentity = (transform is Transform) ? ((Transform)transform).IsIdentity : false;
for (int i = 0; i < this.Count; i++)
{
StylusPoint stylusPoint = this[i];
double xCoord = stylusPoint.X;
double yCoord = stylusPoint.Y;
float pressure = stylusPoint.GetUntruncatedPressureFactor();
if (!isIdentity)
{
Point p = new Point(xCoord, yCoord);
transform.TryTransform(p, out p);
xCoord = p.X;
yCoord = p.Y;
}
int[] newData = null;
if (additionalDataCount > 0)
{
//don't init, we'll do that below
newData = new int[additionalDataCount];
}
StylusPoint newStylusPoint =
new StylusPoint(xCoord, yCoord, pressure, subsetToReformatToWithCurrentMetrics, newData, false, false);
//start at 3, skipping x, y, pressure
for (int x = StylusPointDescription.RequiredCountOfProperties /*3*/; x < properties.Count; x++)
{
int value = stylusPoint.GetPropertyValue(properties[x]);
newStylusPoint.SetPropertyValue(properties[x], value, false /*copy on write*/);
}
//bypass validation
((List <StylusPoint>)newCollection.Items).Add(newStylusPoint);
}
return(newCollection);
}
