public static float GetHorizotalNormalizedPositionAt(this ScrollRect scrollRect, RectTransform target)
{
RectTransform view = scrollRect.viewport != null ? scrollRect.viewport : scrollRect.GetComponent <RectTransform>();
Rect viewRect = view.rect;
Bounds elementBounds = target.TransformBoundsTo(view);
float offset = viewRect.center.x - elementBounds.center.x;
float scrollPos = scrollRect.horizontalNormalizedPosition - scrollRect.NormalizeScrollDistance(0, offset);
return(Mathf.Clamp(scrollPos, 0f, 1f));
}
public static float GetTargetScrollValue(this ScrollRect scrollRect, RectTransform target)
{
var view = scrollRect.viewport != null ? scrollRect.viewport : scrollRect.GetComponent <RectTransform>();
var viewRect = view.rect;
var elementBounds = target.TransformBoundsTo(view);
var offset = viewRect.center.y - elementBounds.center.y;
var scrollPos = scrollRect.verticalNormalizedPosition - scrollRect.NormalizeScrollDistance(1, offset);
return(Mathf.Clamp(scrollPos, 0f, 1f));
}
/// <summary>
/// Scroll the target element to the vertical center of the scroll rect's viewport.
/// Assumes the target element is part of the scroll rect's contents.
/// </summary>
/// <param name="scrollRect">Scroll rect to scroll</param>
/// <param name="target">Element of the scroll rect's content to center vertically</param>
public static void ScrollToCeneter(this ScrollRect scrollRect, RectTransform target)
{
// The scroll rect's view's space is used to calculate scroll position
var view = scrollRect.viewport != null ? scrollRect.viewport : scrollRect.GetComponent <RectTransform>();
// Calcualte the scroll offset in the view's space
var viewRect = view.rect;
var elementBounds = target.TransformBoundsTo(view);
var offset = viewRect.center.y - elementBounds.center.y;
// Normalize and apply the calculated offset
var scrollPos = scrollRect.verticalNormalizedPosition - scrollRect.NormalizeScrollDistance(1, offset);
scrollRect.verticalNormalizedPosition = Mathf.Clamp(scrollPos, 0f, 1f);
}
