Method MeasureTree

Plugins/org.blueberry.ui.qt/src/internal/berryPartSashContainer.cpp:356–412

}

int PartSashContainer::MeasureTree(const QRect& outerBounds,
    LayoutTree::ConstPointer toMeasure, bool horizontal)
{
  if (toMeasure == 0)
  {
    return Geometry::GetDimension(outerBounds, horizontal);
  }

  LayoutTreeNode* parent = toMeasure->GetParent();
  if (parent == nullptr)
  {
    return Geometry::GetDimension(outerBounds, horizontal);
  }

  if (parent->GetSash()->IsHorizontal() == horizontal)
  {
    return MeasureTree(outerBounds, LayoutTree::ConstPointer(parent), horizontal);
  }

  bool isLeft = parent->IsLeftChild(toMeasure);

  LayoutTree::Pointer otherChild = parent->GetChild(!isLeft);
  if (otherChild->IsVisible())
  {
    int left = parent->GetSash()->GetLeft();
    int right = parent->GetSash()->GetRight();
    int childSize = isLeft ? left : right;

    int bias = parent->GetCompressionBias();

    // Normalize bias: 1 = we're fixed, -1 = other child is fixed
    if (isLeft)
    {
      bias = -bias;
    }

    if (bias == 1)
    {
      // If we're fixed, return the fixed size
      return childSize;
    }
    else if (bias == -1)
    {

      // If the other child is fixed, return the size of the parent minus the fixed size of the
      // other child
      return MeasureTree(outerBounds, LayoutTree::ConstPointer(parent), horizontal) - (left + right
          - childSize);
    }

    // Else return the size of the parent, scaled appropriately
    return MeasureTree(outerBounds, LayoutTree::ConstPointer(parent), horizontal) * childSize / (left
        + right);
  }

  return MeasureTree(outerBounds, LayoutTree::ConstPointer(parent), horizontal);
}