scenenode.h

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//--- < SCENENODE.H > -----------| ViewGraph - A Flexible Graph view Framework |
//
// This is the default class in a scene tree.
// Scene nodes can either be leafnodes and get drawn
// or may modify the display/appearance of drawable 
// nodes. Some nodes may do nothing but cache 
// some important data and this is ok as well.
// 
// 
// $Author: botik32 $
// $Revision: 1.5 $
// $Date: 2004/05/14 18:35:08 $
//-----------------------------------------------------------------------------/

#ifndef SCENENODE_H
#define SCENENODE_H

#include <cZUI/leafnode.h>
#include <cZUI/event.h>

class Camera;
class Message;

class SceneNode : public BaseSceneNode{
protected:
        BaseSceneNode *child;
public:

        BaseSceneNode *get_child( void );
        // Scene nodes handle events
        virtual bool handle_event( Event * );

        // They also pass down messages to their underlings
        virtual bool handle_message( Message * );

        // If your node paints some stuff over the leafnode, 
        // add its boundrect here.
        void get_boundrect( double&, double&, double&, double& );

        // If your node paints some stuff over the leafnode, 
        // specify additional checks here
        virtual bool check_event_fitspixels( Event * );

        // translate events up from the child
        virtual void register_event_listener( const char *, 
                EventListener * );
        virtual void unregister_event_listener( const char *, 
                EventListener * );

        void translate( double dx, double dy );
        void rotate( double ax, double ay, double rad );
        void move( double newx, double newy );
        
        SceneNode(); 
        SceneNode( BaseSceneNode * );
        void add_child( BaseSceneNode * );
};

#endif


/// $Log: scenenode.h,v $
/// Revision 1.5  2004/05/14 18:35:08  botik32
/// Fixed a bug related to HUDGroups and a few that I do not
/// remember now.
///
/// Revision 1.4  2004/05/05 07:10:14  botik32
/// Added ContainerNode class for simple element selection/unselection
/// More bugfixes
///
/// 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  2004/04/18 12:58:31  botik32
/// Changes to groupnode's handling of events.
/// This speeds up the framework tremendously but
/// breaks a few things.
///
/// Revision 1.1.1.1  2004/03/26 10:50:24  botik32
/// Initial release
///
/// Revision 1.1.1.1  2004/03/26 08:53:33  botik
/// initial import
///
///
/// Revision 1.12  2003/11/18 10:17:24  botik
/// Got HUDGroup to partially work
/// Fixed a typo in leafnode that caused invalid
/// movement on scroll
///
/// Revision 1.11  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 1.10  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 1.9  2003/11/11 15:30:58  botik
/// Added and compiled second framework test,
/// fixed along a few bugs.
///
/// Revision 1.8  2003/11/09 15:23:01  botik
/// Got GraphDisplay to compile and run.
///
/// Revision 1.7  2003/11/08 23:45:54  botik
/// Got the framework to compile, in order to do that
/// filled in some functions and added some empty
/// ones as well.
///
/// Revision 1.6  2003/11/08 18:54:59  botik
/// Changed handle_event to return bool
///
/// Revision 1.5  2003/11/06 13:35:57  botik
/// Moved leafnode to basescenenode and removed cached
/// boundrect stuff from leafnode. Boundrect will be
/// moved to an optimizedgroupnode.
///
/// Revision 1.4  2003/11/03 16:45:16  botik
/// Some changes to scene nodes after careful
/// consideration
///
/// Revision 1.3  2003/10/28 15:43:55  botik
/// More work on event framework and camera composition and
/// z-ordering
///
/// Revision 1.2  2003/10/24 16:29:10  botik
/// Added more scene support: special scene nodes as well as a
/// camera class that acts as glue between the graph master and the
/// surface.
///
/// Revision 1.1  2003/10/21 17:39:00  botik
/// Added preliminary scene support
///

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