Big change deriving BLayout from BLayoutItem, and allowing viewless BLayouts.

a few highlights: * BLayout now derives publicly from BLayoutItem * Added BAbstractLayout class, which our layouts now derive from * updated layout builders to avoid creating views when they don't need to * updated layout classes * updated AboutSystem to fix a little regression * more details on #6407 * please tell me about any regressions, I've tried to find them all, but some may have slipped by. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38207 a95241bf-73f2-0310-859d-f6bbb57e9c96
2010-08-17 18:43:41 +00:00
parent 0f274fd5b2
commit 1d6c7b6cb6
28 changed files with 1546 additions and 312 deletions
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2010, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef	_ABSTRACT_LAYOUT_H
+#define	_ABSTRACT_LAYOUT_H
+
+#include <Alignment.h>
+#include <Layout.h>
+#include <Size.h>
+
+class BAbstractLayout : public BLayout {
+public:
+								BAbstractLayout();
+								BAbstractLayout(BMessage* from);
+	virtual						~BAbstractLayout();
+
+	virtual	BSize				MinSize();
+	virtual	BSize				MaxSize();
+	virtual	BSize				PreferredSize();
+	virtual	BAlignment			Alignment();
+
+	virtual	void				SetExplicitMinSize(BSize size);
+	virtual	void				SetExplicitMaxSize(BSize size);
+	virtual	void				SetExplicitPreferredSize(BSize size);
+	virtual	void				SetExplicitAlignment(BAlignment alignment);
+
+	virtual	BSize				BaseMinSize();
+	virtual	BSize				BaseMaxSize();
+	virtual	BSize				BasePreferredSize();
+	virtual	BAlignment			BaseAlignment();
+
+	virtual BRect				Frame();
+	virtual	void				SetFrame(BRect frame);	
+
+	virtual	bool				IsVisible();
+	virtual	void				SetVisible(bool visible);
+
+	virtual status_t			Archive(BMessage* into, bool deep = true) const;
+	virtual	status_t			AllUnarchived(const BMessage* from);
+
+protected:
+	virtual	void				OwnerChanged(BView* was);
+	virtual	void				AncestorVisibilityChanged(bool shown);
+
+private:
+			struct	Proxy;
+			struct	ViewProxy;
+			struct	DataProxy;
+
+			Proxy*				fExplicitData;
+};
+
+#endif	//	_ABSTRACT_LAYOUT_ITEM_H