public void OnUpdate()
{
if (draggingPointerEventData == null)
{
return;
}
Vector2 pointerLocalPos;
RectTransformUtility.ScreenPointToLocalPointInRectangle(manager.Viewport, draggingPointerEventData.position, draggingPointerEventData.pressEventCamera, out pointerLocalPos);
bool shouldUpdateViewport = false;
float scale = manager.ImageHolder.localScale.z;
Vector2 imagePosition = manager.ImageHolder.anchoredPosition;
Vector2 selectionBottomLeft = imagePosition + selection.anchoredPosition * scale;
Vector2 selectionTopRight = selectionBottomLeft + selection.sizeDelta * scale;
Vector2 viewportSize = manager.ViewportSize;
if ((directions & Direction.Left) == Direction.Left || (directions & Direction.Right) == Direction.Right)
{
if (pointerLocalPos.x <= SCROLL_DISTANCE && selectionBottomLeft.x <= SELECTION_MAX_DISTANCE_FOR_SCROLL)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Left);
shouldUpdateViewport = true;
}
else if (pointerLocalPos.x >= viewportSize.x - SCROLL_DISTANCE && selectionTopRight.x >= viewportSize.x - SELECTION_MAX_DISTANCE_FOR_SCROLL)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Right);
shouldUpdateViewport = true;
}
}
if ((directions & Direction.Bottom) == Direction.Bottom || (directions & Direction.Top) == Direction.Top)
{
if (pointerLocalPos.y <= SCROLL_DISTANCE && selectionBottomLeft.y <= SELECTION_MAX_DISTANCE_FOR_SCROLL)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Bottom);
shouldUpdateViewport = true;
}
else if (pointerLocalPos.y >= viewportSize.y - SCROLL_DISTANCE && selectionTopRight.y >= viewportSize.y - SELECTION_MAX_DISTANCE_FOR_SCROLL)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Top);
shouldUpdateViewport = true;
}
}
if (shouldUpdateViewport)
{
manager.ImageHolder.anchoredPosition = imagePosition;
OnDrag(draggingPointerEventData);
}
}
public void OnUpdate()
{
bool shouldUpdateViewport = false;
float scale = manager.ImageHolder.localScale.z;
Vector2 imagePosition = manager.ImageHolder.anchoredPosition;
Vector2 selectionBottomLeft = imagePosition + selection.anchoredPosition * scale;
Vector2 selectionTopRight = selectionBottomLeft + selection.sizeDelta * scale;
Vector2 selectionSize = selectionTopRight - selectionBottomLeft;
Vector2 viewportSize = manager.ViewportSize;
if (selectionBottomLeft.x <= SCROLL_DISTANCE)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Left);
selectionBottomLeft.x = 0f;
shouldUpdateViewport = true;
}
else if (selectionTopRight.x >= viewportSize.x - SCROLL_DISTANCE)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Right);
selectionBottomLeft.x = viewportSize.x - selectionSize.x;
shouldUpdateViewport = true;
}
if (selectionBottomLeft.y <= SCROLL_DISTANCE)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Bottom);
selectionBottomLeft.y = 0f;
shouldUpdateViewport = true;
}
else if (selectionTopRight.y >= viewportSize.y - SCROLL_DISTANCE)
{
imagePosition = manager.ScrollImage(imagePosition, Direction.Top);
selectionBottomLeft.y = viewportSize.y - selectionSize.y;
shouldUpdateViewport = true;
}
if (shouldUpdateViewport)
{
manager.ImageHolder.anchoredPosition = imagePosition;
manager.UpdateSelection((selectionBottomLeft - imagePosition) / scale);
}
}