Make BALMLayout respect its position when nested.

headers/libs/alm/Area.h

@@ -106,7 +106,7 @@ private:
 									Row* row, Column* column,
 									RowColumnManager* manager);
 
-			void				_DoLayout();
+			void				_DoLayout(const BPoint& offset);
 
 			void				_UpdateMinSizeConstraint(BSize min);
 			void				_UpdateMaxSizeConstraint(BSize max);

src/libs/alm/ALMLayout.cpp

@@ -794,14 +794,15 @@ BALMLayout::DoLayout()
 
 	// Enforced absolute positions of Right and Bottom
 	BRect area(LayoutArea());
-	Right()->SetRange(area.right, area.right);
+	BSize size(area.Size());
-	Bottom()->SetRange(area.bottom, area.bottom);
+	Right()->SetRange(size.width, size.width);
+	Bottom()->SetRange(size.height, size.height);
 
 	_TrySolve();
 
 	// set the calculated positions and sizes for every area
 	for (int32 i = 0; i < CountItems(); i++)
-		AreaFor(ItemAt(i))->_DoLayout();
+		AreaFor(ItemAt(i))->_DoLayout(area.LeftTop());
 }
 
 

src/libs/alm/Area.cpp

@@ -565,7 +565,7 @@ Area::_Init(LinearSpec* ls, Row* row, Column* column, RowColumnManager* manager)
  * Perform layout on the area.
  */
 void
-Area::_DoLayout()
+Area::_DoLayout(const BPoint& offset)
 {
 	// check if if we are initialized
 	if (!fLeft)
@@ -577,7 +577,7 @@ Area::_DoLayout()
 	areaFrame.top += TopInset();
 	areaFrame.bottom -= BottomInset();
 
-	fLayoutItem->AlignInFrame(areaFrame);
+	fLayoutItem->AlignInFrame(areaFrame.OffsetBySelf(offset));
 }