zoomableview.h

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//--- < ZOOMABLEVIEW.H > --------| ViewGraph - A Flexible Graph view Framework |
//
// This is the abstract class for a zoomable view.
// See ZoomableSurfaceView and ZoomableObjectView
// for their non-abstract descendants.
//
//
// $Author: botik32 $
// $Revision: 1.3 $
// $Date: 2004/05/03 21:02:01 $
//-----------------------------------------------------------------------------/

#ifndef ZOOMABLEVIEW_H
#define ZOOMABLEVIEW_H

#include <cZUI/scrollableview.h>

class ZoomableView : public ScrollableView{
public:
        virtual double zoom( double factor )=0;
        virtual double get_zoom( void )=0;
        virtual double get_thickness1( void )=0;
        virtual void pen( unsigned char r, unsigned char g, 
                unsigned char b, double thickness )=0;
        virtual void get_pen( unsigned char& r, 
                unsigned char& g, unsigned char& b, double& thickness )=0;
        virtual void clear_rect( double, double, double, double )=0;
        virtual void repaint_rect( double, double, double, double )=0;
        virtual void get_rect( double&, double&, double&, double& )=0;
        ZoomableView( SurfaceDriver *, int, int, int, int,
                unsigned char, unsigned char, unsigned char );
};

#endif

/// $Log: zoomableview.h,v $
/// Revision 1.3  2004/05/03 21:02:01  botik32
/// Significant changes and many bugfixes.
/// ScrollableView now has a background color used to
/// tell SurfaceDriver to clear with.
/// SurfaceDriver's clear() requires a color now
/// Added SceneEvents for all node additions/removals
/// in GroupNode and Camera.
/// Added paint_selected and paint_selected_invalid
/// to ActiveLeaf
/// Modified ActiveLeaf's mouse_down and mouse_up
/// handler signatures to accept an Event* instead of
/// Camera*
/// - Many more bugfixes
///
/// Revision 1.2  2004/04/09 17:15:08  botik32
/// Changes in interface: added get_pen to scrollableview and
/// surfacedriver
///
/// Revision 1.1.1.1  2004/03/26 10:50:26  botik32
/// Initial release
///
/// Revision 1.1.1.1  2004/03/26 08:53:33  botik
/// initial import
///
///
/// Revision 1.10  2003/11/24 20:45:29  botik
/// Merged four features from surfacecamera into camera.
/// Modified ScrollableView to hold a width/height of
/// the viewport and to report it to whoever asks.
/// Added scenex, sceney fields to Event.
/// Added coordinate transform for all messages, done
/// at camera level. This should speed up drawability
/// and mouseover checks.
///
/// Repaint and mouse detection work now over arbitrary
/// magnification.
/// Borderlayer is broken and scrolling segfaults in
/// a weird way.
///
/// Revision 1.9  2003/11/24 16:12:10  botik
/// Halfway through major redesign of a view's geometric
/// parameters. This will influence zooming and repainting.
///
/// Revision 1.8  2003/11/20 00:32:41  botik
/// Changed the way repaint works by using a screen
/// rectangle as intermediate event.
/// Added get_screenrect to Camera
/// Added screen2scenerect to Camera
///
/// Revision 1.7  2003/11/17 18:39:37  botik
/// Added rectangle to surface driver.
/// Sdxpsdl line and rectangle bugfixes
///
/// Revision 1.6  2003/11/17 13:46:34  botik
/// Removed default cursor from scrollableview
/// Changed message handling behaviour for GroupNode
///     to recognize broadcast messages
/// Changed message handling behaviour for BaseSceneNode
///     to recognize broadcast messages
/// Added NodeTranslateMessage to message module
/// Added handling of NodeTranslateMessage for LeafNode
///
/// Revision 1.5  2003/11/15 16:45:18  botik
/// Added ActiveLeaf node allowing for much easier scene
/// node creation.
/// Added default_cursor to scrollableview.
/// Numerous bugfixes.
/// MouseIn/Out now changes cursor.
///
/// Revision 1.4  2003/11/13 18:50:18  botik
/// Fixed (almost) clear and update rect behaviour.
/// Added update_rect to framework and sdl wrapper.
/// Added mouse_in/mouse_out handling
/// Fixed message handling
/// Many small bugfixes
///
/// Revision 1.3  2003/11/13 12:50:51  botik
/// Refined the event handling architecture
/// Got the event handling to recognize and treat mouse
/// events accordingly
/// Important fixes to ./Makefile
///
/// Revision 1.2  2003/11/09 15:23:01  botik
/// Got GraphDisplay to compile and run.
///
/// Revision 1.1  2003/10/21 17:39:00  botik
/// Added preliminary scene support
///

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