uiget.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 89 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
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*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include "uidef.h"
#include "uiforce.h"

extern EVENT    Event;
extern void intern waitforevent( void );

void global uiflush( void )
{
    Event = EV_NO_EVENT;
    flushkey();
}

unsigned long global uiclock( void )
{
    return( GetTickCount() );
}

extern EVENT intern getanyevent( void );

EVENT global uieventsource( int update )
{
    EVENT                   ev;
    static      int                     ReturnIdle = 1;
    unsigned long                       start;

    start = uiclock();
    for( ; ; ) {
        ev = forcedevent();
        if( ev > EV_NO_EVENT ) break;
        ev = getanyevent();
        if( ev > EV_NO_EVENT ) break;
        if( ReturnIdle ) {
            ReturnIdle--;
            return( EV_IDLE );
        } else {
            if( update ) uirefresh();
            if( uiclock() - start >= UIData->tick_delay ) {
                return( EV_CLOCK_TICK );
            } else if( UIData->busy_wait ) {
                return( EV_SINK );
            }
        }
        waitforevent();
    }
    ReturnIdle = 1;
    return( ev );
}


EVENT global uiget( void )
{
    return( uieventsource( 1 ) );
}