135 lines
2.8 KiB
C#
135 lines
2.8 KiB
C#
//----------------------------------------------
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// NGUI: Next-Gen UI kit
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// Copyright © 2011-2015 Tasharen Entertainment
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//----------------------------------------------
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using UnityEngine;
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using System.Collections;
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/// <summary>
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/// Allows dragging of the specified scroll view by mouse or touch.
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/// </summary>
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[AddComponentMenu("NGUI/Interaction/Drag Scroll View")]
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public class UIDragScrollView : MonoBehaviour
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{
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/// <summary>
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/// Reference to the scroll view that will be dragged by the script.
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/// </summary>
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public UIScrollView scrollView;
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// Legacy functionality, kept for backwards compatibility. Use 'scrollView' instead.
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[HideInInspector][SerializeField] UIScrollView draggablePanel;
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Transform mTrans;
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UIScrollView mScroll;
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bool mAutoFind = false;
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bool mStarted = false;
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/// <summary>
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/// Automatically find the scroll view if possible.
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/// </summary>
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void OnEnable ()
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{
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mTrans = transform;
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// Auto-upgrade
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if (scrollView == null && draggablePanel != null)
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{
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scrollView = draggablePanel;
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draggablePanel = null;
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}
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if (mStarted && (mAutoFind || mScroll == null))
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FindScrollView();
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}
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/// <summary>
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/// Find the scroll view.
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/// </summary>
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void Start ()
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{
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mStarted = true;
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FindScrollView();
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}
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/// <summary>
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/// Find the scroll view to work with.
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/// </summary>
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void FindScrollView ()
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{
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// If the scroll view is on a parent, don't try to remember it (as we want it to be dynamic in case of re-parenting)
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UIScrollView sv = NGUITools.FindInParents<UIScrollView>(mTrans);
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if (scrollView == null || (mAutoFind && sv != scrollView))
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{
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scrollView = sv;
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mAutoFind = true;
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}
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else if (scrollView == sv)
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{
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mAutoFind = true;
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}
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mScroll = scrollView;
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}
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/// <summary>
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/// Create a plane on which we will be performing the dragging.
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/// </summary>
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void OnPress (bool pressed)
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{
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// If the scroll view has been set manually, don't try to find it again
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if (mAutoFind && mScroll != scrollView)
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{
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mScroll = scrollView;
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mAutoFind = false;
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}
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if (scrollView && enabled && NGUITools.GetActive(gameObject))
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{
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scrollView.Press(pressed);
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if (!pressed && mAutoFind)
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{
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scrollView = NGUITools.FindInParents<UIScrollView>(mTrans);
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mScroll = scrollView;
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}
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}
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}
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/// <summary>
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/// Drag the object along the plane.
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/// </summary>
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void OnDrag (Vector2 delta)
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{
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if (scrollView && NGUITools.GetActive(this))
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scrollView.Drag();
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}
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/// <summary>
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/// If the object should support the scroll wheel, do it.
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/// </summary>
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void OnScroll (float delta)
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{
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if (scrollView && NGUITools.GetActive(this))
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scrollView.Scroll(delta);
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}
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/// <summary>
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/// Pan the scroll view.
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/// </summary>
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public void OnPan (Vector2 delta)
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{
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if (scrollView && NGUITools.GetActive(this))
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scrollView.OnPan(delta);
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}
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}
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