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 OnTransformParentChanged()
{
base.OnTransformParentChanged();
m_Canvas = null;
if (!IsActive())
{
return;
}
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
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();
}
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];
// -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 OnBeforeTransformParentChanged()
{
GraphicRegistry.UnregisterGraphicForCanvas(canvas, this);
LayoutRebuilder.MarkLayoutForRebuild(rectTransform);
}
