每日自动提交 2026-04-13 18:30

2026-04-13 18:30:55 +08:00
parent 7f92437976
commit c438308159
187 changed files with 42955 additions and 64615 deletions
@@ -0,0 +1,116 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+using Direction = ImageCropper.Direction;
+
+namespace ImageCropperNamespace
+{
+	public class SelectionMovementHandler : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler, ISelectionHandler
+	{
+		private const float SCROLL_DISTANCE = 5f;
+
+		[SerializeField]
+		private ImageCropper manager;
+
+		private RectTransform selection;
+
+		private Vector2 initialPosition;
+		private Vector2 initialTouchPosition;
+
+		private int draggingPointer;
+
+		private void Awake()
+		{
+			selection = manager.Selection;
+		}
+
+		private void OnDisable()
+		{
+			manager.StopModifySelectionWith( this );
+		}
+
+		public void OnBeginDrag( PointerEventData eventData )
+		{
+			if( !manager.CanModifySelectionWith( this ) )
+			{
+				eventData.pointerDrag = null;
+				return;
+			}
+
+			draggingPointer = eventData.pointerId;
+
+			initialPosition = selection.anchoredPosition;
+			initialTouchPosition = manager.GetTouchPosition( eventData.pressPosition, eventData.pressEventCamera );
+		}
+
+		public void OnDrag( PointerEventData eventData )
+		{
+			if( eventData.pointerId != draggingPointer )
+			{
+				eventData.pointerDrag = null;
+				return;
+			}
+
+			manager.UpdateSelection( initialPosition + manager.GetTouchPosition( eventData.position, eventData.pressEventCamera ) - initialTouchPosition );
+		}
+
+		public void OnEndDrag( PointerEventData eventData )
+		{
+			if( eventData.pointerId == draggingPointer )
+				manager.StopModifySelectionWith( this );
+		}
+
+		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 );
+			}
+		}
+
+		public void Stop()
+		{
+			draggingPointer--;
+		}
+	}
+}