/// <summary>
/// When dragging is occurring this will be called every time the cursor is moved.
/// </summary>
/// <param name="eventData">Event data.</param>
public virtual void OnDrag(PointerEventData eventData)
{
var movement = 0f;
var size = (ScrollRect.transform as RectTransform).rect.size;
var max_x = Mathf.Max(0f, ScrollRect.content.rect.width - size.x);
var max_y = Mathf.Max(0f, ScrollRect.content.rect.height - size.y);
if (ScrollRect.content.anchoredPosition.y < 0f)
{
movement = -ScrollRect.content.anchoredPosition.y;
pullDirection = PullDirection.Up;
}
else if (ScrollRect.content.anchoredPosition.y > max_y)
{
movement = ScrollRect.content.anchoredPosition.y - max_y;
pullDirection = PullDirection.Down;
}
else if (ScrollRect.content.anchoredPosition.x < 0f)
{
movement = -ScrollRect.content.anchoredPosition.x;
pullDirection = PullDirection.Left;
}
else if (ScrollRect.content.anchoredPosition.x > max_x)
{
movement = ScrollRect.content.anchoredPosition.x - max_x;
pullDirection = PullDirection.Right;
}
if (movement >= RequiredMovement)
{
if (!isPullValid)
{
OnPullAllowed.Invoke(pullDirection);
isPullValid = true;
}
}
else
{
if (isPullValid)
{
OnPullCancel.Invoke(pullDirection);
isPullValid = false;
pullDirection = PullDirection.None;
}
}
}
private void HandlePullDirection()
{
var isVerticalPull = Mathf.Abs(Input.GetAxis("Mouse Y")) > rotationThreshold;
var isHorizontalPull = Mathf.Abs(Input.GetAxis("Mouse X")) > rotationThreshold;
if (isVerticalPull)
{
this.pullDirection = PullDirection.Vertical;
}
else if (isHorizontalPull)
{
this.pullDirection = PullDirection.Horizontal;
}
else
{
this.pullDirection = PullDirection.None;
}
}
/// <summary>
/// Resets the drag values.
/// </summary>
protected virtual void ResetDrag()
{
pullDirection = PullDirection.None;
isPullValid = false;
}
