/// <summary>
/// 8/6 2020 Graphic源码学习
/// 在更换父节点之前调用方法
/// 之所以在更换父节点的情况下进行Canvas的撤销和注册，主要是防止Canvas间切换父节点的情况
/// </summary>
protected override void OnBeforeTransformParentChanged()
{
// Debug.Log("OnBeforeTransformParentChanged");
//先撤销组件和canvas的关联
GraphicRegistry.UnregisterGraphicForCanvas(canvas, this);
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
}
private static void Raycast(Canvas canvas, Camera eventCamera, Vector2 pointerPosition, List <GameObject> results)
{
// Necessary for the event system
var foundGraphics = GraphicRegistry.GetGraphicsForCanvas(canvas);
s_SortedGraphics.Clear();
for (int i = 0; i < foundGraphics.Count; ++i)
{
Graphic graphic = foundGraphics[i];
// -1 means it hasn't been processed by the canvas, which means it isn't actually drawn
if (graphic.depth == -1)
{
continue;
}
if (!RectTransformUtility.PointInRectangle(pointerPosition, graphic.rectTransform, eventCamera))
{
continue;
}
if (graphic.Raycast(pointerPosition, eventCamera))
{
s_SortedGraphics.Add(graphic);
}
}
s_SortedGraphics.Sort((g1, g2) => g2.depth.CompareTo(g1.depth));
for (int i = 0; i < s_SortedGraphics.Count; ++i)
{
results.Add(s_SortedGraphics[i].gameObject);
}
}
protected override void OnBeforeTransformParentChanged()
{
//Deregister the given Graphic from a Canvas.
GraphicRegistry.UnregisterGraphicForCanvas(canvas, this);
//Mark the given RectTransform as needing it's layout to be recalculated during the next layout pass.
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
}
/// <summary>
/// 17/6 2020 Graphic学习
/// 主要是Canvas显示隐藏或者canvas控件OnEnable、Disable的时候调用
/// 主要是检测Canvas控件的
/// </summary>
protected override void OnCanvasHierarchyChanged()
{
// Debug.Log("OnCanvasHierarchyChanged");
// Use m_Cavas so we dont auto call CacheCanvas
Canvas currentCanvas = m_Canvas;
// Clear the cached canvas. Will be fetched below if active.
m_Canvas = null;
if (!IsActive())
{
return;
}
CacheCanvas();
if (currentCanvas != m_Canvas)
{
//currentCanvas ！= m_Canvas时，说明UI更换了canvas，需要与之前的Canvas解除关联
GraphicRegistry.UnregisterGraphicForCanvas(currentCanvas, this);
// Only register if we are active and enabled as OnCanvasHierarchyChanged can get called
// during object destruction and we dont want to register ourself and then become null.
if (IsActive())
{
//如果当前组件还是在激活状态下的话，就将当前UI和新的canvas进行注册绑定
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
}
}
}
private static void Raycast(Canvas canvas, Camera eventCamera, Vector2 pointerPosition, List <Graphic> results)
{
IList <Graphic> graphicsForCanvas = GraphicRegistry.GetGraphicsForCanvas(canvas);
for (int i = 0; i < graphicsForCanvas.Count; i++)
{
Graphic graphic = graphicsForCanvas[i];
if (!graphic.canvasRenderer.cull)
{
if (graphic.depth != -1 && graphic.raycastTarget)
{
if (RectTransformUtility.RectangleContainsScreenPoint(graphic.rectTransform, pointerPosition, eventCamera))
{
if (graphic.Raycast(pointerPosition, eventCamera))
{
GraphicRaycaster.s_SortedGraphics.Add(graphic);
}
}
}
}
}
GraphicRaycaster.s_SortedGraphics.Sort((Graphic g1, Graphic g2) => g2.depth.CompareTo(g1.depth));
for (int j = 0; j < GraphicRaycaster.s_SortedGraphics.Count; j++)
{
results.Add(GraphicRaycaster.s_SortedGraphics[j]);
}
GraphicRaycaster.s_SortedGraphics.Clear();
}
protected override void OnCanvasHierarchyChanged()
{
// Use m_Cavas so we dont auto call CacheCanvas
Canvas currentCanvas = m_Canvas;
// Clear the cached canvas. Will be fetched below if active.
m_Canvas = null;
if (!IsActive())
{
return;
}
CacheCanvas();
if (currentCanvas != m_Canvas)
{
GraphicRegistry.UnregisterGraphicForCanvas(currentCanvas, this);
// Only register if we are active and enabled as OnCanvasHierarchyChanged can get called
// during object destruction and we dont want to register ourself and then become null.
if (IsActive())
{
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
}
}
}
protected override void OnBeforeTransformParentChanged()
{
if (raycastTarget)
{
GraphicRegistry.UnregisterGraphicForCanvas(canvas, this);
}
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
}
protected override void OnTransformParentChanged()
{
if (this.IsActive())
{
this.CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(this.canvas, this);
this.SetAllDirty();
}
}
protected override void OnTransformParentChanged()
{
base.OnTransformParentChanged();
if (IsActive())
{
CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
SetAllDirty();
}
}
/// <summary>
/// Mark the Graphic and the canvas as having been changed.
/// </summary>
protected override void OnEnable()
{
base.OnEnable();
CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
#if UNITY_EDITOR
GraphicRebuildTracker.TrackGraphic(this);
#endif
SetAllDirty();
}
protected override void OnDisable()
{
GraphicRegistry.UnregisterGraphicForCanvas(this.canvas, this);
CanvasUpdateRegistry.UnRegisterCanvasElementForRebuild(this);
if (this.canvasRenderer != null)
{
this.canvasRenderer.Clear();
}
LayoutRebuilder.MarkLayoutForRebuild(this.rectTransform);
base.OnDisable();
}
protected override void OnEnable()
{
base.OnEnable();
this.CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(this.canvas, this);
if (Graphic.s_WhiteTexture == null)
{
Graphic.s_WhiteTexture = Texture2D.whiteTexture;
}
this.SetAllDirty();
}
protected override void OnCanvasHierarchyChanged()
{
Canvas c = this.m_Canvas;
this.CacheCanvas();
if (c != this.m_Canvas)
{
GraphicRegistry.UnregisterGraphicForCanvas(c, this);
GraphicRegistry.RegisterGraphicForCanvas(this.canvas, this);
}
}
protected override void OnCanvasHierarchyChanged()
{
Canvas c = this.m_Canvas;
this.CacheCanvas();
if (!((UnityEngine.Object)c != (UnityEngine.Object) this.m_Canvas))
{
return;
}
GraphicRegistry.UnregisterGraphicForCanvas(c, this);
GraphicRegistry.RegisterGraphicForCanvas(this.canvas, this);
}
protected override void OnTransformParentChanged()
{
base.OnTransformParentChanged();
this.m_Canvas = (Canvas)null;
if (!this.IsActive())
{
return;
}
this.CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(this.canvas, this);
this.SetAllDirty();
}
protected override void OnEnable()
{
base.OnEnable();
this.CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(this.canvas, this);
GraphicRebuildTracker.TrackGraphic(this);
if ((UnityEngine.Object)Graphic.s_WhiteTexture == (UnityEngine.Object)null)
{
Graphic.s_WhiteTexture = Texture2D.whiteTexture;
}
this.SetAllDirty();
}
/// <summary>
///
/// <para>
/// See MonoBehaviour.OnDisable.
/// </para>
///
/// </summary>
protected override void OnDisable()
{
GraphicRebuildTracker.UnTrackGraphic(this);
GraphicRegistry.UnregisterGraphicForCanvas(this.canvas, this);
CanvasUpdateRegistry.UnRegisterCanvasElementForRebuild((ICanvasElement)this);
if ((UnityEngine.Object) this.canvasRenderer != (UnityEngine.Object)null)
{
this.canvasRenderer.Clear();
}
LayoutRebuilder.MarkLayoutForRebuild(this.rectTransform);
base.OnDisable();
}
protected override void OnCanvasHierarchyChanged()
{
// Use m_Cavas so we dont auto call CacheCanvas
Canvas currentCanvas = m_Canvas;
CacheCanvas();
if (currentCanvas != m_Canvas)
{
GraphicRegistry.UnregisterGraphicForCanvas(currentCanvas, this);
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
}
}
private static void Raycast(Canvas canvas, Camera eventCamera, Vector2 pointerPosition, List <Graphic> results)
{
IList <Graphic> graphicsForCanvas = GraphicRegistry.GetGraphicsForCanvas(canvas);
for (int i = 0; i < graphicsForCanvas.Count; i++)
{
Graphic item = graphicsForCanvas[i];
if ((!item.canvasRenderer.cull && (item.depth != -1)) && ((item.raycastTarget && RectTransformUtility.RectangleContainsScreenPoint(item.rectTransform, pointerPosition, eventCamera)) && item.Raycast(pointerPosition, eventCamera)))
{
s_SortedGraphics.Add(item);
}
}
if (< > f__am$cache0 == null)
{
protected override void OnDestroy()
{
#if UNITY_EDITOR
GraphicRebuildTracker.UnTrackGraphic(this);
#endif
GraphicRegistry.UnregisterGraphicForCanvas(canvas, this);
CanvasUpdateRegistry.UnRegisterCanvasElementForRebuild(this);
if (m_CachedMesh)
{
Destroy(m_CachedMesh);
}
m_CachedMesh = null;
base.OnDestroy();
}
/// <summary>
/// Mark the Graphic and the canvas as having been changed.
/// </summary>
protected override void OnEnable()
{
base.OnEnable();
CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
#if UNITY_EDITOR
GraphicRebuildTracker.TrackGraphic(this);
#endif
if (s_WhiteTexture == null)
{
s_WhiteTexture = Texture2D.whiteTexture;
}
SetAllDirty();
}
/// <summary>
/// Clear references.
/// </summary>
protected override void OnDisable()
{
#if UNITY_EDITOR
GraphicRebuildTracker.UnTrackGraphic(this);
#endif
GraphicRegistry.UnregisterGraphicForCanvas(canvas, this);
CanvasUpdateRegistry.UnRegisterCanvasElementForRebuild(this);
if (canvasRenderer != null)
{
canvasRenderer.Clear();
}
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
base.OnDisable();
}
protected override void OnTransformParentChanged()
{
base.OnTransformParentChanged();
m_Canvas = null;
if (!IsActive())
{
return;
}
CacheCanvas();
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
//全部重建（布局、材质、顶点）
SetAllDirty();
}
public void SetRaycastDirty()
{
if (m_RaycastTargetCache != m_RaycastTarget)
{
if (m_RaycastTarget && isActiveAndEnabled)
{
GraphicRegistry.RegisterRaycastGraphicForCanvas(canvas, this);
}
else if (!m_RaycastTarget)
{
GraphicRegistry.UnregisterRaycastGraphicForCanvas(canvas, this);
}
}
m_RaycastTargetCache = m_RaycastTarget;
}
protected override void OnTransformParentChanged()
{
base.OnTransformParentChanged();
m_Canvas = null;
if (!IsActive())
{
return;
}
CacheCanvas();
if (raycastTarget)
{
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
}
SetAllDirty();
}
/// <summary>
/// 16/6 2020 Graphic源码学习
/// 在更换父节点时调用方法
/// </summary>
protected override void OnTransformParentChanged()
{
// Debug.Log(" OnTransformParentChanged");
base.OnTransformParentChanged();
m_Canvas = null;
if (!IsActive())
{
return;
}
//查找这个物体的canvas
CacheCanvas();
//将canvas和图形组件进行绑定
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
SetAllDirty();
}
protected override void OnCanvasHierarchyChanged()
{
Canvas canvas = this.m_Canvas;
this.m_Canvas = null;
if (this.IsActive())
{
this.CacheCanvas();
if (canvas != this.m_Canvas)
{
GraphicRegistry.UnregisterGraphicForCanvas(canvas, this);
if (this.IsActive())
{
GraphicRegistry.RegisterGraphicForCanvas(this.canvas, this);
}
}
}
}
private static void Raycast(Canvas canvas, Camera eventCamera, Vector2 pointerPosition, List <Graphic> results)
{
IList <Graphic> graphicsForCanvas = GraphicRegistry.GetGraphicsForCanvas(canvas);
for (int index = 0; index < graphicsForCanvas.Count; ++index)
{
Graphic graphic = graphicsForCanvas[index];
if (graphic.depth != -1 && graphic.raycastTarget && (RectTransformUtility.RectangleContainsScreenPoint(graphic.rectTransform, pointerPosition, eventCamera) && graphic.Raycast(pointerPosition, eventCamera)))
{
GraphicRaycaster.s_SortedGraphics.Add(graphic);
}
}
GraphicRaycaster.s_SortedGraphics.Sort((Comparison <Graphic>)((g1, g2) => g2.depth.CompareTo(g1.depth)));
for (int index = 0; index < GraphicRaycaster.s_SortedGraphics.Count; ++index)
{
results.Add(GraphicRaycaster.s_SortedGraphics[index]);
}
GraphicRaycaster.s_SortedGraphics.Clear();
}
private static void Raycast(Canvas canvas, Camera eventCamera, Vector2 pointerPosition, List <Graphic> results)
{
// Debug.Log("ttt" + pointerPoision + ":::" + camera);
// Necessary for the event system
var foundGraphics = GraphicRegistry.GetGraphicsForCanvas(canvas);
for (int i = 0; i < foundGraphics.Count; ++i)
{
Graphic graphic = foundGraphics[i];
if (graphic.canvasRenderer.cull)
{
continue;
}
// -1 means it hasn't been processed by the canvas, which means it isn't actually drawn
if (graphic.depth == -1 || !graphic.raycastTarget)
{
continue;
}
if (!RectTransformUtility.RectangleContainsScreenPoint(graphic.rectTransform, pointerPosition, eventCamera))
{
continue;
}
if (graphic.Raycast(pointerPosition, eventCamera))
{
s_SortedGraphics.Add(graphic);
}
}
s_SortedGraphics.Sort((g1, g2) => g2.depth.CompareTo(g1.depth));
// StringBuilder cast = new StringBuilder();
for (int i = 0; i < s_SortedGraphics.Count; ++i)
{
results.Add(s_SortedGraphics[i]);
}
// Debug.Log (cast.ToString());
s_SortedGraphics.Clear();
}
protected override void OnCanvasHierarchyChanged()
{
// Use m_Cavas so we dont auto call CacheCanvas
Canvas currentCanvas = m_Canvas;
// Clear the cached canvas. Will be fetched below if active.
m_Canvas = null;
if (!IsActive())
{
return;
}
CacheCanvas();
if (currentCanvas != m_Canvas)
{
GraphicRegistry.UnregisterGraphicForCanvas(currentCanvas, this);
GraphicRegistry.RegisterGraphicForCanvas(canvas, this);
}
}