Add inset and spacing to BALMLayout. Each Area is able to overwrite this global values and use his own inset. Add spacing and inset to the tests.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38792 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/libs/alm/ALMLayout.h

@@ -28,7 +28,7 @@ namespace BALM {
  */
 class BALMLayout : public BAbstractLayout {
 public:
-								BALMLayout();
+								BALMLayout(float spacing = 0.0f);
 	virtual						~BALMLayout();
 
 			XTab*				AddXTab();
@@ -65,6 +65,12 @@ public:
 
 			LinearSpec*			Solver();
 
+			void				SetInset(float inset);
+			float				Inset();
+
+			void				SetSpacing(float spacing);
+			float				Spacing();
+
 private:
 			void				_SolveLayout();
 
@@ -86,6 +92,9 @@ private:
 			BSize				fMaxSize;
 			BSize				fPreferredSize;
 			char*				fPerformancePath;
+
+			float				fInset;
+			float				fSpacing;
 };
 
 }	// namespace BALM

headers/libs/alm/Area.h

@@ -93,6 +93,7 @@ private:
 
 private:
 			BLayoutItem*		fLayoutItem;
+
 			LinearSpec*			fLS;
 
 			XTab*				fLeft;
@@ -106,10 +107,8 @@ private:
 			BSize				fShrinkPenalties;
 			BSize				fGrowPenalties;
 
-			int32				fLeftInset;
-			int32				fTopInset;
-			int32				fRightInset;
-			int32				fBottomInset;
+			BSize				fTopLeftInset;
+			BSize				fRightBottomInset;
 
 			BList				fConstraints;
 			Constraint*			fMinContentWidth;