/********************************************************************************
*                                                                               *
*                       I m a g e   V i e w   W i d g e t                       *
*                                                                               *
*********************************************************************************
* Copyright (C) 2000 by Jeroen van der Zijp.   All Rights Reserved.             *
*********************************************************************************
* This library is free software; you can redistribute it and/or                 *
* modify it under the terms of the GNU Library General Public                   *
* License as published by the Free Software Foundation; either                  *
* version 2 of the License, or (at your option) any later version.              *
*                                                                               *
* This library is distributed in the hope that it will be useful,               *
* but WITHOUT ANY WARRANTY; without even the implied warranty of                *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU             *
* Library General Public License for more details.                              *
*                                                                               *
* You should have received a copy of the GNU Library General Public             *
* License along with this library; if not, write to the Free                    *
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.            *
*********************************************************************************
* $Id: FXImageView.h,v 1.4 2000/08/25 17:07:58 jeroen Exp $                     *
********************************************************************************/
#ifndef FXIMAGEVIEW_H
#define FXIMAGEVIEW_H


class FXImage;


/**
* The Image View widget display a scrollable view of an image.
*/
class FXAPI FXImageView : public FXScrollArea {
  FXDECLARE(FXImageView)
protected:
  FXImage *image;         // Image to view
  FXint    grabx;         // Grab point x
  FXint    graby;         // Grab point y
protected:
  FXImageView();
  virtual void layout();
private:
  FXImageView(const FXImageView&);
  FXImageView &operator=(const FXImageView&);
public:
  long onPaint(FXObject*,FXSelector,void*);
  long onMotion(FXObject*,FXSelector,void*);
  long onRightBtnPress(FXObject*,FXSelector,void*);
  long onRightBtnRelease(FXObject*,FXSelector,void*);
public:
  enum {
    ID_XYZ=FXScrollArea::ID_LAST,
    ID_LAST
    };
public:

  /// Construct a scroll window
  FXImageView(FXComposite* p,FXImage* img=NULL,FXObject* tgt=NULL,FXSelector sel=0,FXuint opts=0,FXint x=0,FXint y=0,FXint w=0,FXint h=0);

  /// Create server-side resources
  virtual void create();
  
  /// Detach server-side resources
  virtual void detach();
  
  /// Image view widget can receive focus
  virtual FXbool canFocus() const;
  
  /// Return the width of the contents
  virtual FXint getContentWidth();

  /// Return the height of the contents
  virtual FXint getContentHeight();
  
  /// Change image
  void setImage(FXImage* img);
  
  /// Return image
  FXImage* getImage() const { return image; }

  /// Save list to a stream
  virtual void save(FXStream& store) const;
  
  /// Load list from a stream
  virtual void load(FXStream& store);

  /// Destroy
  virtual ~FXImageView();
  };


#endif
