/*
** Copyright 2004, OpenBeOS. All Rights Reserved.
** Distributed under the terms of the OpenBeOS License.
*/
#ifndef _SCROLL_VIEW_H
#define _SCROLL_VIEW_H

/**	The BScrollView is a convenience class to add a scrolling
 *	mechanism to the target view.
 */

#include <ScrollBar.h>


class BScrollView : public BView {
	public:
		BScrollView(const char *name, BView *target,
			uint32 resizingMode = B_FOLLOW_LEFT | B_FOLLOW_TOP,
			uint32 flags = 0, bool horizontal = false, bool vertical = false,
			border_style border = B_FANCY_BORDER);
		BScrollView(BMessage *archive);
		virtual ~BScrollView();

		static BArchivable	*Instantiate(BMessage *archive);
		virtual status_t	Archive(BMessage *archive, bool deep = true) const;

		virtual void		Draw(BRect updateRect);
		virtual void		AttachedToWindow();

		BScrollBar			*ScrollBar(orientation posture) const;

		virtual void		SetBorder(border_style border);
		border_style		Border() const;

		virtual status_t	SetBorderHighlighted(bool state);
		bool				IsBorderHighlighted() const;

		void				SetTarget(BView *target);
		BView				*Target() const;

		virtual void		MessageReceived(BMessage *message);
		virtual void		MouseDown(BPoint point);

		virtual void		WindowActivated(bool active);
		virtual	void		MouseUp(BPoint point);
		virtual	void		MouseMoved(BPoint point, uint32 code, const BMessage *msg);

		virtual	void		DetachedFromWindow();
		virtual	void		AllAttached();
		virtual	void		AllDetached();

		virtual	void		FrameMoved(BPoint position);
		virtual	void		FrameResized(float width, float height);

		virtual BHandler	*ResolveSpecifier(BMessage *message, int32 index,
								BMessage *specifier, int32 form, const char *property);

		virtual void		ResizeToPreferred();
		virtual void		GetPreferredSize(float *_width, float *_height);
		virtual void		MakeFocus(bool state = true);
		virtual status_t	GetSupportedSuites(BMessage *data);

		virtual	BSize		MinSize();
		virtual	BSize		PreferredSize();

		// private or reserved methods are following

		virtual status_t	Perform(perform_code d, void *arg);

	private:
		friend class BView;

		virtual	void		_ReservedScrollView1();
		virtual	void		_ReservedScrollView2();
		virtual	void		_ReservedScrollView3();
		virtual	void		_ReservedScrollView4();

		BScrollView			&operator=(const BScrollView &);

		static BRect		CalcFrame(BView *target, bool h, bool v, border_style);
		static float		BorderSize(border_style border);
		static int32		ModifyFlags(int32 flags, border_style);

		BView				*fTarget;
		BScrollBar			*fHorizontalScrollBar;
		BScrollBar			*fVerticalScrollBar;
		border_style		fBorder;
		uint16				fPreviousWidth;
		uint16				fPreviousHeight;
		bool				fHighlighted;

		uint32				_reserved[3];
};

#endif  /* _SCROLL_VIEW_H */