void AddSpacingPosition(float spacingPos, ReferenceRects referenceRects)
{
if (!m_SpacingPositions.ContainsKey(spacingPos))
{
m_SpacingPositions.Add(spacingPos, referenceRects);
}
}
void ComputeSpacingPositions(ReferenceRects referenceRects, Rect sourceRect)
{
SnapReference startReference = referenceRects.Orientation == Orientation.Vertical ? SnapReference.TopEdge : SnapReference.LeftEdge;
SnapReference endReference = referenceRects.Orientation == Orientation.Vertical ? SnapReference.BottomEdge : SnapReference.RightEdge;
for (int i = 0; i < referenceRects.Rects.Count; ++i)
{
Rect firstRect = referenceRects.Rects[i];
int nextRectIndex = i + 1; // After rect i is done, we don't consider it anymore for the next iterations
for (int j = nextRectIndex; j < referenceRects.Rects.Count; ++j)
{
Rect secondRect = referenceRects.Rects[j];
// For each rect i, we find the 3 spacing positions: (examples are for horizontal orientation)
// - 1. position before rect i
// +-----+ +-----+ +-----+
// | pos | | i | | j |
// +-----+ +-----+ +-----+
// - 2. position between rect i and rect j
// +-----+ +-----+ +-----+
// | i | | pos | | j |
// +-----+ +-----+ +-----+
// - 3. position after rect j
// +-----+ +-----+ +-----+
// | i | | j | | pos |
// +-----+ +-----+ +-----+
List <float> spacingPositions = GetSpacingPositions(sourceRect, firstRect, secondRect, startReference, endReference, referenceRects.Orientation);
AddSpacingPositions(spacingPositions, sourceRect, firstRect, secondRect, referenceRects.Orientation);
}
}
}
SnapToSpacingResult GetSnapToSpacingResult(Rect sourceRect, float middlePos, ReferenceRects referenceRects)
{
float sourceRectCenter = referenceRects.Orientation == Orientation.Vertical ? GetMaxPos(sourceRect, SnapReference.VerticalCenter).y : GetMaxPos(sourceRect, SnapReference.HorizontalCenter).x;
float offset = sourceRectCenter - middlePos;
SnapToSpacingResult minResult = new SnapToSpacingResult {
Offset = offset,
ReferenceRects = referenceRects
};
return(minResult.Distance <= SnapDistance * 1 / m_CurrentScale ? minResult : null);
}
