- Add a alternative method to setup a group layout. BLayoutItem / BView are wrapped into a GroupItem. GroupItem overloads the | (horizontal tiling) and / (vertical tiling) operators. In this manner you can create a group layout using these operators, e.g. GroupItem item = GroupItem(button1) | (GroupItem(button2) / GroupItem(button3)); would layout button1 at the left and button2 and button3 at the right in a vertical layout. All the layout information is stored in the GroupItem item, to setup the final layout you have to call BuildLayout(item). If you like it it could also be added to the BGroupLayout.

- Add operator test app.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38877 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/libs/alm/ALMLayout.h

@@ -69,6 +69,10 @@ public:
 			YTab*				BottomOf(const BView* view) const;
 			YTab*				BottomOf(const BLayoutItem* item) const;
 
+			void				BuildLayout(GroupItem& item, XTab* left = NULL,
+									YTab* top = NULL, XTab* right = NULL,
+									YTab* bottom = NULL);
+
 	virtual	BLayoutItem*		AddView(BView* child);
 	virtual	BLayoutItem*		AddView(int32 index, BView* child);
 	virtual	Area*				AddView(BView* view, XTab* left, YTab* top,
@@ -127,6 +131,8 @@ private:
 			BSize				_CalculateMaxSize();
 			BSize				_CalculatePreferredSize();
 
+			void				_ParseGroupItem(GroupItem& item, XTab* left,
+									YTab* top, XTab* right, YTab* bottom);
 
 			LinearSpec			fSolver;
 

headers/libs/alm/Area.h

@@ -6,6 +6,8 @@
 #define	AREA_H
 
 
+#include <vector>
+
 #include <Alignment.h>
 #include <List.h>
 #include <Size.h>
@@ -24,6 +26,35 @@ class Constraint;
 namespace BALM {
 
 
+class GroupItem {
+public:
+								GroupItem(BLayoutItem* item);
+								GroupItem(BView* view);
+
+			BLayoutItem*		LayoutItem();
+			BView*				View();
+
+	const	std::vector<GroupItem>&	GroupItems();
+			enum orientation	Orientation();
+
+			GroupItem& 			operator|(const GroupItem& right);
+			GroupItem& 			operator/(const GroupItem& bottom);
+private:
+								GroupItem();
+
+			void				_Init(BLayoutItem* item, BView* view,
+									  enum orientation orien = B_HORIZONTAL);
+			GroupItem& 			_AddItem(const GroupItem& item,
+									enum orientation orien);
+
+			BLayoutItem*		fLayoutItem;
+			BView*				fView;
+
+			std::vector<GroupItem>	fGroupItems;
+			enum orientation	fOrientation;
+};
+
+
 /**
  * Rectangular area in the GUI, defined by a tab on each side.
  */
@@ -122,6 +153,7 @@ public:
 }	// namespace BALM
 
 using BALM::Area;
+using BALM::GroupItem;
 
 #endif	// AREA_H