leafnode.h

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//--- < LEAFNODE.H > ------------| ViewGraph - A Flexible Graph view Framework |
//
// Leaf node is an abstract class that only 
// knows its position.
// Inherit from LeafNode to include specific 
// node pointer and paint policy class.
// You may even call multiple policy painting
// classes depending on context (camera).
//
// Please note that get_boundrect should return
// a rectangle according to its position i.e.
// the get_boundrect should add xpos,ypos to the
// origin of the bound rectangle.
// 
// $Author: botik32 $
// $Revision: 1.2 $
// $Date: 2004/05/03 21:02:01 $
//-----------------------------------------------------------------------------/

#ifndef LEAFNODE_H
#define LEAFNODE_H

#include <cZUI/basescenenode.h>

class LeafNode : public BaseSceneNode{
protected:
        double xpos, ypos;
public:
        LeafNode( double, double );

        virtual void paint( Camera * )=0;
        /// You must override this function to
        /// provide an accurate estimation of the
        /// bounding rectangle. Make sure the 
        /// function is as "light" as possible 
        /// because it will be called very often.
        virtual void get_boundrect( double&, double&, 
                                                                double&, double& )=0;
        virtual void translate( double dx, double dy );
        virtual void rotate( double ax, double ay, double rad );
        virtual void move( double newx, double newy );

        bool handle_message( Message * );
        bool handle_event( Event * );

        // mouse and repaint events require special
        // processing
        bool handle_event( MouseEvent * );
        bool handle_event( RepaintEvent * );
};

#endif

/// $Log: leafnode.h,v $
/// Revision 1.2  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 1.1.1.1  2004/03/26 10:50:23  botik32
/// Initial release
///
/// Revision 1.1.1.1  2004/03/26 08:53:33  botik
/// initial import
///
///
/// Revision 1.9  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 1.8  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 1.7  2003/11/11 15:30:58  botik
/// Added and compiled second framework test,
/// fixed along a few bugs.
///
/// Revision 1.6  2003/11/11 14:44:34  botik
/// Changed zoomablesurfaceview to zoom the commands
/// (which it was supposed to do in the first place),
/// Changed some function details in leafnode,
/// Added a new test in tests
///
/// Revision 1.5  2003/11/09 15:23:01  botik
/// Got GraphDisplay to compile and run.
///
/// Revision 1.4  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 1.3  2003/11/05 17:35:21  botik
/// Added a cached boundrect to the leafnode.
///
/// Revision 1.2  2003/11/03 16:45:16  botik
/// Some changes to scene nodes after careful
/// consideration
///
/// Revision 1.1  2003/10/21 17:39:00  botik
/// Added preliminary scene support
///

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