EGL--鼠标类函数实现文件 MOUSE.INC

/*
  MOUSE.INC
*/

void pascal set_event_handler(int call_mask,void far( *location)())
{
  union REGS r;
  struct SREGS sr;
  if(MOUSE_THERE){   /* THE MOUSE FUNCTION 12 */
     r.x.ax=12;
     r.x.cx=call_mask;
     r.x.dx=FP_OFF( location );
     sr.es=FP_SEG( location );
     int86x(0x33,&r,&r,&sr);
     }
}
/*---------------------------------------------------------------------*/
void near event_processor(int event_status,int button_status,int x,int y)
     /* LOAD THE MOUSE EVENT PROGRAGM */
{
  if(MOUSE_THERE){
     if( (CMX!=x) || (CMY!=y) ){
      MOUSE_MOVED=1;
      CMX=x; CMY=y;
      }
     else
      MOUSE_MOVED=0;
     BSTATE=button_status;
     if(event_status & 2){  LBUTTON_DOWN=1; LBUTTON_UP=0;  }
     if(event_status & 8){  RBUTTON_DOWN=1; RBUTTON_UP=0;  }
     if(event_status & 4){  LBUTTON_UP=1;   LBUTTON_DOWN=0; }
     if(event_status & 16){ RBUTTON_UP=1;   RBUTTON_DOWN=0; }
  }
}
/*--------------------------------------------------------------------*/
int reset_mouse(void)   /* THE MOUSE FUNCTION 0 */
{
   _AX=0;
   geninterrupt(0x33);
   if(_AX>0){
      MOUSENUM=_AX;
      MOUSE_THERE=1;
      mouse_on();
      return(OK);
      }
   else{
      MOUSE_THERE=0;
      return(ERROR);
      }
}
/*-------------------------------------------------------------------*/
void mouse_off(void)   /* THE MOUSE FUNCTION 2 */
{
   if( !MOUSE_THERE || MOUSE_VISIBLE==0 ) return;
   _AX=2;
   geninterrupt(0x33);
   MOUSE_VISIBLE=0;
}
/*-------------------------------------------------------------------*/
void mouse_on(void)   /* THE MOUSE FUNCTION 1 */
{
   if( !MOUSE_THERE || MOUSE_VISIBLE==1 ) return;
   _AX=1;
   geninterrupt(0x33);
   MOUSE_VISIBLE=1;
}
/*-------------------------------------------------------------------*/
void mouse_shape(int shape[32],int hotx,int hoty)
{
   union REGS regs;
   struct SREGS sregs;
   mouse_off();
   regs.x.ax=9;
   regs.x.bx=hotx;
   regs.x.cx=hoty;
   regs.x.dx=FP_OFF(shape);
   sregs.es=FP_SEG(shape);
   int86x(0x33,&regs,&regs,&sregs);
   mouse_on();
}
/*------------------------------------------------------------------*/
void set_mouse_position(int x,int y)
{
   _AX=4;
   _CX=x;
   _DX=y;
   geninterrupt(0x33);
}
/*-------------------------------------------------------------------*/
/*
调用双击的条件为判断是否为左键下
当调用双击不成时,再检查一次左键按下否,如下,{则说明刚才为单击,将左键状态消去}
即:每次调用双击后,必须再调用一次单击,否则有可能丢失键击状态
if( LBUTTON_DOWN ){
  if( get_double_press() ) ... 双击如何
  else ...单击如何
  }
*/
int get_double_press(void); /* get if lbutton was pressed twice */
int get_double_press(void)
{
   int x,y;
   if( LBUTTON_DOWN ){
       LBUTTON_DOWN=0;
       x=CMX; y=CMY;
       Delay(DOUBLE_CLICK_TIME);
       if(LBUTTON_DOWN && x==CMX && y==CMY){
  LBUTTON_DOWN=0;
  LBUTTON_UP=0;
  return(1);
  }
       else{
  LBUTTON_DOWN=1;
  return(0);
  }
   }
}
/*--------------------------------------------------------------------*/
void set_text_cursor(int groundmask,int textmask)
{
   _AX=10;
   _BX=0;
   _CX=groundmask;
   _DX=textmask;
   geninterrupt(0x33);
}
/*--------------------------------------------------------------------*/
void InstallEvent(void)
{
   set_event_handler(127,event_handler);
}
/*-----------------------------------------------------------*/
void reset_event_status(void)
{
   MOUSE_MOVED=0; LBUTTON_DOWN=0;
   RBUTTON_DOWN=0; LBUTTON_UP=0;
   RBUTTON_UP=0; BSTATE=0;
}
/*------------------------------------------------------------------------*/
void set_mousex(int minx,int maxx)
{
   _AX=7;
   _CX=minx;  _DX=maxx;
   geninterrupt(0x33);
}
/*-----------------------------------------------------------------------*/
void set_mousey(int miny,int maxy)
{
   _AX=8;
   _CX=miny;  _DX=maxy;
   geninterrupt(0x33);
}

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