Keep the preferred size ratio into account. This make layout behaviour much more intuitive when resizing a window. Thanks Christof.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39641 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/libs/alm/ALMLayout.h

@@ -151,6 +151,9 @@ private:
 			float				fSpacing;
 
 			Area*				fCurrentArea;
+
+			Variable*			fScaleWidth;
+			Variable*			fScaleHeight;
 };
 
 }	// namespace BALM

headers/libs/alm/Area.h

@@ -107,8 +107,12 @@ private:
 								Area(BLayoutItem* item);
 
 			void				_Init(LinearSpec* ls, XTab* left, YTab* top,
-									XTab* right, YTab* bottom);
-			void				_Init(LinearSpec* ls, Row* row, Column* column);
+									XTab* right, YTab* bottom,
+									Variable* scaleWidth,
+									Variable* scaleHeight);
+			void				_Init(LinearSpec* ls, Row* row, Column* column,
+									Variable* scaleWidth,
+									Variable* scaleHeight);
 
 			void				_DoLayout();
 
@@ -145,6 +149,9 @@ private:
 			double				fContentAspectRatio;
 			Constraint*			fContentAspectRatioC;
 
+			Variable*			fScaleWidth;
+			Variable*			fScaleHeight;
+
 public:
 	friend class		BALMLayout;