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display.c

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/*************************************************************************
*   FILE: display.c
* AUTHOR: CAL
* DATE: 25 April 1993
* PURPOSE:
*   A display is a viewport which can contain "screen objects",
*   such as windows and buttons.
**************************************************************************/

#include "display.h"


void Display::Add (ScrnObj *a, int x, int y)
{
  list.Append (a);
  a->Init (this, x, y);
}


void Display::Draw (void)
{
  if (list.Reset ())
    do {
      list.GetCurrent()->Draw ();
    } while (list.Next ());
}

void Display::Erase (void)
{
  if (list.Reset ())
    do {
      list.GetCurrent()->Erase ();
    } while (list.Next ());
}


Message Display::Dispatch (Message& msg)
{
  if (! list.Reset ())        // if list is empty
    return NullMsg;         //   return
  else
  {

    Message m = msg;
    switch (msg.origin)
    {
      case MouseMsg:      // Do d1,d2 represent coordinates?
  m.d1 = TransX (msg.d1);   // Translate them.
  m.d2 = TransY (msg.d2);
//  if (!InBounds (m.d1, m.d2))
//    return NullMsg;
  break;
    }

    Message ret;
    do {
      ret = list.GetCurrent()->Dispatch (m);  // pass to next scrnobj
    } while ((ret == NullMsg) && list.Next ());

    return ret;
  }
}

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