Merge from layout management branch.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18649 a95241bf-73f2-0310-859d-f6bbb57e9c96
2006-08-26 16:21:15 +00:00
parent 01595708f3
commit 9ecf9d1c1d
277 changed files with 45889 additions and 747 deletions
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2006, Haiku Inc.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef	_LAYOUT_H
+#define	_LAYOUT_H
+
+#include <Alignment.h>
+#include <List.h>
+#include <Size.h>
+
+class BLayoutItem;
+class BView;
+
+
+class BLayout {
+public:
+								BLayout();
+	virtual						~BLayout();
+
+			BView*				View() const;
+
+	virtual	BLayoutItem*		AddView(BView* child);
+	virtual	BLayoutItem*		AddView(int32 index, BView* child);
+
+	virtual	bool				AddItem(BLayoutItem* item);
+	virtual	bool				AddItem(int32 index, BLayoutItem* item);
+
+	virtual	bool				RemoveView(BView* child);
+	virtual	bool				RemoveItem(BLayoutItem* item);
+	virtual	BLayoutItem*		RemoveItem(int32 index);
+
+			BLayoutItem*		ItemAt(int32 index) const;
+			int32				CountItems() const;
+			int32				IndexOfItem(BLayoutItem* item) const;
+			int32				IndexOfView(BView* child) const;
+
+	virtual	BSize				MinSize() = 0;
+	virtual	BSize				MaxSize() = 0;
+	virtual	BSize				PreferredSize() = 0;
+	virtual	BAlignment			Alignment() = 0;
+
+	virtual	bool				HasHeightForWidth() = 0;
+	virtual	void				GetHeightForWidth(float width, float* min,
+									float* max, float* preferred) = 0;
+
+	virtual	void				InvalidateLayout();
+
+	virtual	void				LayoutView() = 0;
+
+protected:
+// TODO: Since memory allocations can fail, we should return a bool and
+// undo the addition, if false.
+	virtual	void				ItemAdded(BLayoutItem* item);
+	virtual	void				ItemRemoved(BLayoutItem* item);
+
+
+private:
+			friend class BView;
+
+			void				SetView(BView* view);
+
+			BView*				fView;
+			BList				fItems;
+};
+
+#endif	//	_LAYOUT_H