* Add new spacing/inset constants for the layout API. For now, leave B_USE_DEFAULT_SPACING, but this will go soon.

* Rename BControlLook::ComposeItemSpacing() to ComposeSpacing(), and extend it to handle the new constants.
* Adjust users of BControlLook::ComposeItemSpacing() accordingly.
* part of #7447


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42025 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/ControlLook.h

@@ -79,7 +79,8 @@ public:
 
 	/* TODO: virtual*/
 			float				DefaultItemSpacing() const;
-	static	float				ComposeItemSpacing(float spacing);
+
+	static	float				ComposeSpacing(float spacing);
 
 			uint32				Flags(BControl* control) const;
 

headers/os/interface/InterfaceDefs.h

@@ -223,7 +223,23 @@ enum vertical_alignment {
 	B_ALIGN_USE_FULL_HEIGHT		= -2L
 };
 
-const float B_USE_DEFAULT_SPACING = -2.0f;
+
+// Layout spacing and insets, see BControlLook::ComposeSpacing()
+
+
+enum {
+	B_USE_DEFAULT_SPACING = -2,
+	B_USE_ITEM_SPACING = -2,
+	B_USE_ITEM_INSETS = -2,
+	B_USE_HALF_ITEM_SPACING = -3,
+	B_USE_HALF_ITEM_INSETS = -3,
+	B_USE_WINDOW_INSETS = -4,
+	B_USE_WINDOW_SPACING = -4,
+	B_USE_SMALL_INSETS = -5,
+	B_USE_SMALL_SPACING = -5,
+	B_USE_BIG_INSETS = -6,
+	B_USE_BIG_SPACING = -6
+};
 
 
 // Line join and cap modes