EventContextI.h

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/*  Copyright (C) 2003-2021 Free Electron Organization
    Any use of this software requires a license.  If a valid license
    was not distributed with this file, visit freeelectron.org. */

/** @file */

#ifndef __window_EventContextI_h__
#define __window_EventContextI_h__

namespace fe
{
namespace ext
{

/**************************************************************************//**
    @brief Interface for processing queued windowing events

    @ingroup window
*//***************************************************************************/
class FE_DL_EXPORT EventContextI:
    virtual public Component,
    public CastableAs<EventContextI>
{
    public:
virtual void    loop(BWORD dropout)                                         =0;
                /// @brief lock the display for the given thread
virtual void    threadLock(void)                                            =0;
                /// @brief unlock the display for the given thread
virtual void    threadUnlock(void)                                          =0;

                /** @brief request buttonless mouse motion events

                    This will can substantially increase the
                    number of generated events, so it off
                    by default. */
virtual void    setPointerMotion(BWORD active)                              =0;

                /// @brief check if pointer motion events are on
virtual BWORD   pointerMotion(void)                                         =0;

virtual Real    multiplication(void)                                        =0;

//~virtual U32  fontBase(void)                                              =0;

                /// @brief pixel height of the current font
//~virtual I32  fontHeight(I32* pAscent=NULL,I32* pDescent=NULL)            =0;
                /// @brief pixel width of string in the current font
//~virtual I32  pixelWidth(String string)                                   =0;

virtual void    registerWindow(WindowI *window)                             =0;
virtual void    deregisterWindow(WindowI *window)                           =0;
};

} /* namespace ext */
} /* namespace fe */

#endif /* __window_EventContextI_h__ */