/// <summary>
/// Restrict the scroll view's contents to be within the scroll view's bounds.
/// </summary>
public bool RestrictWithinBounds(bool instant, bool horizontal, bool vertical)
{
if (mPanel == null)
{
return(false);
}
Bounds b = bounds;
Vector3 constraint = mPanel.CalculateConstrainOffset(b.min, b.max);
// 检测边界
bool isTop = false, isBottom = false, isLeft = false, isRight = false;
mPanel.CheckBorder(ref isTop, ref isBottom, ref isLeft, ref isRight);
// Debug.LogError("Reset 1" + constraint);
if (!horizontal)
{
constraint.x = 0f;
}
if (!vertical)
{
constraint.y = 0f;
}
mConstraint = constraint;
if (isRight)
{
mConstraint.x = 1;
}
if (isLeft)
{
mConstraint.x = -1;
}
if (isTop)
{
mConstraint.y = 1;
}
if (isBottom)
{
mConstraint.y = -1;
}
if (!horizontal)
{
mConstraint.x = 0f;
}
if (!vertical)
{
mConstraint.y = 0f;
}
//Debug.LogError("Reset 2" + mConstraint);
if (constraint.sqrMagnitude > 0.1f)
{
if (!instant && dragEffect == DragEffect.MomentumAndSpring)
{
// Spring back into place
Vector3 pos = mTrans.localPosition + constraint;
pos.x = Mathf.Round(pos.x);
pos.y = Mathf.Round(pos.y);
if (backWhenFits && !disableDragIfFits)
{
pos += GetMoveOffsets() - constraint;
}
sp = SpringPanel.Begin(mPanel.gameObject, pos, 13f, sp);
sp.strength = 8f;
}
else
{
// Jump back into place
MoveRelative(constraint);
// Clear the momentum in the constrained direction
if (Mathf.Abs(constraint.x) > 0.01f)
{
mMomentum.x = 0;
}
if (Mathf.Abs(constraint.y) > 0.01f)
{
mMomentum.y = 0;
}
if (Mathf.Abs(constraint.z) > 0.01f)
{
mMomentum.z = 0;
}
mScroll = 0f;
}
return(true);
}
return(false);
}
