callback_caller_base.h

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/*! \file
  \brief  The CallbackMethodCallerBase class.
 
  \par Copyright Information
 
  Copyright (c) 2017 by The DiSTI Corporation.<br>
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  Orlando, Florida 32817<br>
  USA<br>
  <br>
  All rights reserved.<br>
 
  This Software contains proprietary trade secrets of DiSTI and may not be
reproduced, in whole or part, in any form, or by any means of electronic,
mechanical, or otherwise, without the written permission of DiSTI.  Said
permission may be derived through the purchase of applicable DiSTI product
licenses which detail the distribution rights of this content and any
Derivative Works based on this or other copyrighted DiSTI Software.
 
  NO WARRANTY. THE SOFTWARE IS PROVIDED "AS-IS," WITHOUT WARRANTY OF ANY KIND,
AND ANY USE OF THIS SOFTWARE PRODUCT IS AT YOUR OWN RISK. TO THE MAXIMUM EXTENT
PERMITTED BY APPLICABLE LAW, DISTI AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES
AND CONDITIONS, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT, WITH REGARD TO THE SOFTWARE.
 
  LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW,
IN NO EVENT SHALL DISTI OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION,
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*/
#ifndef _CALLBACK_CALLER_BASE_H
#define _CALLBACK_CALLER_BASE_H
 
#include <cstddef>
 
namespace disti
{
// Forward references
class DisplayObject;
class DisplayEvent;
 
/** CallbackMethodCallerBase will be derived by any
    class desiring to use it.
    It allows for calling bound methods for specific objects
*/
class CallbackMethodCallerBase
{
protected:
    // Constructor is protected to force
    // derivation without making it pure virtual
    CallbackMethodCallerBase(){};
 
public:
    virtual ~CallbackMethodCallerBase() {}
 
    /// This is for mouse and keyboard events.
    /// \return 1 if event is handled, 0 otherwise.
    virtual int Call( DisplayObject* /*target*/, DisplayEvent* ) { return 0; };
 
    /// This is used mostly for user events.
    /// The callbackData is generally passed in when this object is created.
    virtual void CallType2( DisplayEvent*, void* /*callbackData*/ = NULL ){};
 
    /// Allows for a very simple callback, with no additional data passed.
    virtual void CallType3(){};
 
    /// \return A pointer to an exact copy of this callback object.
    virtual CallbackMethodCallerBase* Duplicate() const { return NULL; }
 
    /// Assign a new object to be the target of this callback.
    /// \param container The new target object.
    virtual void SetContainer( DisplayObject* container ) = 0;
};
 
} // namespace disti
#endif