/// <summary>
/// Helper method for retrieving the correct signs for resizing and positioning
/// based on pointer position relative to this handle.
/// </summary>
/// <param name="pData">The PointerEventData containing the pointers position.</param>
/// <returns>A Vector4, with the following relations:
/// x -> east <-> west resize sign
/// y -> north <-> south resize sign
/// z -> east <-> west re-position sign
/// w -> north <-> south re-position sign.true
/// </returns>
private Vector4 GetSigns(PointerEventData pData)
{
Vector4 result = Vector4.zero;
// Set of booleans representing whether the view data has reached
// its minimum/maximum dimension on a given axis.
bool isMinWidth = ViewData.TotalWidth == ViewData.MinTotalWidth;
bool isMaxWidth = ViewData.TotalWidth == ViewData.MaxTotalWidth;
bool isMinHeight = ViewData.TotalHeight == ViewData.MinTotalHeight;
bool isMaxHeight = ViewData.TotalHeight == ViewData.MaxTotalHeight;
if (pData.IsEastOf(transform.position))
{
// x -> east <-> west resize sign.
result.x = EastWestResizeSigns[ResizeDirection][0];
// z -> east <-> west re-position sign.
result.z = EastWestPosSigns[ResizeDirection][0];
}
else
{
// Same as above.
result.x = EastWestResizeSigns[ResizeDirection][1];
result.z = EastWestPosSigns[ResizeDirection][1];
}
if (pData.IsNorthOf(transform.position))
{
// y -> north <-> south resize sign.
result.y = NorthSouthResizeSigns[ResizeDirection][0];
// w -> north <-> south re-position sign.
result.w = NorthSouthPosSigns[ResizeDirection][0];
}
else
{
// Same as above.
result.y = NorthSouthResizeSigns[ResizeDirection][1];
result.w = NorthSouthPosSigns[ResizeDirection][1];
}
// If a dimension has reached its min/max, set the sign
// for that dimension to zero.
if (isMinWidth && result.x < 0)
{
result.x = 0;
result.z = 0;
}
if (isMaxWidth && result.x > 0)
{
result.x = 0;
result.z = 0;
}
if (isMinHeight && result.y < 0)
{
result.y = 0;
result.w = 0;
}
if (isMaxHeight && result.y > 0)
{
result.y = 0;
result.w = 0;
}
return(result);
}
