private void OnHeaderSizeChanged(PostLayoutEvent e)
{
if (!this.m_HeaderSizeIsValid && GroupNode.IsValidRect(this.m_HeaderItem.layout))
{
this.UpdateGeometryFromContent();
this.m_HeaderSizeIsValid = true;
this.m_HeaderItem.UnregisterCallback <PostLayoutEvent>(new EventCallback <PostLayoutEvent>(this.OnHeaderSizeChanged), Capture.NoCapture);
}
}
public void UpdateGeometryFromContent()
{
if (base.panel != null && this.m_Initialized && !this.m_IsUpdatingGeometryFromContent && !this.m_IsMovingElements)
{
GraphView firstAncestorOfType = base.GetFirstAncestorOfType <GraphView>();
if (firstAncestorOfType != null)
{
this.m_IsUpdatingGeometryFromContent = true;
VisualElement contentViewContainer = firstAncestorOfType.contentViewContainer;
Rect rect = Rect.zero;
if (this.m_ContainedElements != null)
{
for (int i = 0; i < this.m_ContainedElements.Count; i++)
{
GraphElement graphElement = this.m_ContainedElements[i];
if (graphElement.panel == base.panel)
{
Rect rect2 = new Rect(0f, 0f, graphElement.GetPosition().width, graphElement.GetPosition().height);
if (GroupNode.IsValidRect(rect2))
{
rect2 = graphElement.ChangeCoordinatesTo(contentViewContainer, rect2);
if (!GroupNode.IsValidRect(rect))
{
rect = rect2;
}
else
{
rect = RectUtils.Encompass(rect, rect2);
}
}
}
}
}
if (this.m_ContainedElements == null || this.m_ContainedElements.Count == 0)
{
float x = this.m_ContentItem.style.borderLeftWidth.value + this.m_ContentItem.style.paddingLeft.value;
float y = this.m_HeaderItem.layout.height + this.m_ContentItem.style.borderTopWidth.value + this.m_ContentItem.style.paddingTop.value;
rect = this.ChangeCoordinatesTo(contentViewContainer, new Rect(x, y, 0f, 0f));
}
float num = 10f;
if (this.m_HeaderItem != null)
{
Vector2 size = this.m_TitleItem.DoMeasure(100f, VisualElement.MeasureMode.Undefined, 100f, VisualElement.MeasureMode.Undefined);
if (GroupNode.IsValidSize(size))
{
num = size.x + this.m_TitleItem.style.marginLeft.value + this.m_TitleItem.style.paddingLeft.value + this.m_TitleItem.style.paddingRight.value + this.m_TitleItem.style.marginRight.value;
}
}
float val = num + this.m_HeaderItem.style.paddingLeft.value + this.m_HeaderItem.style.paddingRight.value;
Vector2 size2 = rect.size;
size2.x += this.m_ContentItem.style.borderLeftWidth.value + this.m_ContentItem.style.paddingLeft.value + this.m_ContentItem.style.paddingRight.value + this.m_ContentItem.style.borderRightWidth.value;
size2.y += this.m_ContentItem.style.borderTopWidth.value + this.m_ContentItem.style.paddingTop.value + this.m_ContentItem.style.paddingBottom.value + this.m_ContentItem.style.borderBottomWidth.value;
Rect position = default(Rect);
position.position = contentViewContainer.ChangeCoordinatesTo(base.parent, rect.position);
position.width = Math.Max(size2.x, val) + base.style.borderLeftWidth.value + base.style.borderRightWidth.value;
position.height = size2.y + this.m_HeaderItem.layout.height + base.style.borderTopWidth.value + base.style.borderBottomWidth.value;
position.x -= this.m_ContentItem.style.paddingLeft.value + base.style.borderLeftWidth.value;
position.y -= this.m_ContentItem.style.paddingTop.value + this.m_HeaderItem.layout.height + base.style.borderTopWidth.value;
this.SetPosition(position);
Vector2 vector = this.ChangeCoordinatesTo(contentViewContainer, new Vector2(0f, 0f));
this.mPreviousPosInCanvasSpace = vector;
this.m_ContainedElementsRect = contentViewContainer.ChangeCoordinatesTo(this, rect);
this.m_IsUpdatingGeometryFromContent = false;
}
}
}