source: trunk/src/user32/win32wndchild.cpp

/* $Id: win32wndchild.cpp,v 1.8 2004-04-20 10:11:44 sandervl Exp $ */
/*
 * Win32 Child/Parent window class for OS/2
 *
 *
 * Copyright 1998 Sander van Leeuwen (sandervl@xs4all.nl)
 *
 *
 * Project Odin Software License can be found in LICENSE.TXT
 *
 */
#include <os2win.h>
#include "win32wndchild.h"
#include <misc.h>

#define DBG_LOCALLOG    DBG_win32wndchild
#include "dbglocal.h"

//******************************************************************************
//******************************************************************************
ChildWindow::ChildWindow(VMutex *pLock)
{
  parent     = 0;
  nextchild  = 0;
  children   = 0;
  pLockChild = pLock;
}
//******************************************************************************
//******************************************************************************
ChildWindow::~ChildWindow()
{
  if(parent) {
        parent->removeChild(this);
  }
//SvL: PM sends WM_DESTROY for all the children
#if 0
  if(children != 0) {
        dprintf(("ChildWindow::~ChildWindow children not yet destroyed!!"));
        DestroyChildren();
  }
#endif
}
//******************************************************************************
//FIFO insertion
//******************************************************************************
BOOL ChildWindow::addChild(ChildWindow *child)
{
 ChildWindow *curchild;

   Lock();

   curchild = children;
   if(curchild == NULL) {
        children = child;
   }
   else {
        while(curchild->getNextChild()) {
                curchild = curchild->getNextChild();
        }
        curchild->setNextChild(child);
   }
   child->setNextChild(NULL);

   Unlock();
   return TRUE;
}
//******************************************************************************
//Remove child from linked list. Doesn't delete it!
//******************************************************************************
BOOL ChildWindow::removeChild(ChildWindow *child)
{
 ChildWindow *curchild = children;

   Lock();

   if(curchild == child) {
        children = child->getNextChild();       
   }
   else {
        if(curchild == NULL) {
                dprintf(("ChildWindow::RemoveChild, children == NULL"));
                DebugInt3();
                Unlock();
                return FALSE;
        }
        while(curchild->getNextChild() != child) {
                curchild = curchild->getNextChild();
                if(curchild == NULL) {
                        dprintf(("ChildWindow::RemoveChild, curchild == NULL"));
                        DebugInt3();
                        Unlock();
                        return FALSE;
                }       
        }
        curchild->setNextChild(child->getNextChild());
   }
   Unlock();
   return TRUE;
}
//******************************************************************************
//******************************************************************************
BOOL ChildWindow::destroyChildren()
{
   while(children) {
        delete children;        //child dtor removes itself from the linked list
   }
   return TRUE;
}
//******************************************************************************
//******************************************************************************