/*
 * QCameraDropSite.cpp
 * $Id: QCameraDropSite.cpp,v 1.4 2001/11/15 16:54:53 guenth Exp $
 *
 * Copyright (C) 1999, 2000 Markus Janich
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * As a special exception to the GPL, the QGLViewer authors (Markus
 * Janich, Michael Meissner, Richard Guenther, Alexander Buck and Thomas
 * Woerner) give permission to link this program with Qt (non-)commercial
 * edition, and distribute the resulting executable, without including
 * the source code for the Qt (non-)commercial edition in the source
 * distribution.
 *
 */

//  Description : Class QCameraDropSite
//  Purpose     : Provides a drag'n drop area for cameras

// Qt
///////
#include <qevent.h>
#include <qpixmap.h>
#include <qdragobject.h>


// System
///////////


// Own
///////////
#include "QCameraDropSite.h"
#include "QCameraDrag.h"
#include "pictures/dragcamera.xpm"



// Function  : QCameraDropSite
// Parameters: CCamera *pCamera, QWidget *parent, const char *sName
// Purpose   : default constructor.
// Comments  : See docu for details.
QCameraDropSite::QCameraDropSite(QWidget *parent, const char *sName)
  : QLabel(parent, sName ),
    m_pCamera(NULL)
/*********************************************************************/
{
  QPixmap dragCameraPix((const char **)dragcamera_xpm);

  if (!(dragCameraPix.isNull()))
     setPixmap( dragCameraPix );
  else
     setText("Drag and Drop");
  setAlignment(Qt::AlignCenter);

  setFrameStyle(QFrame::Raised + QFrame::WinPanel);
  setAcceptDrops(TRUE);
}



// Function  : ~QCameraDropSite
// Parameters: 
// Purpose   : default destructor.
// Comments  : See docu for details.
QCameraDropSite::~QCameraDropSite()
/*********************************************************************/
{  /* nothing else to do */ }



// Function  : dragEnterEvent
// Parameters: QDragEnterEvent *pqEvent
// Purpose   : handles QDragEnterEvents.
// Comments  : See docu for details.
void QCameraDropSite::dragEnterEvent(QDragEnterEvent *pqEvent)
/*********************************************************************/
{
  if (!isEnabled())
    return;

  if ( QCameraDrag::canDecode(pqEvent)) {
    pqEvent->accept();
    setFrameStyle(QFrame::Sunken + QFrame::WinPanel);  
  }
}



// Function  : dragLeaveEvent
// Parameters: QDragLeaveEvent *pqEvent
// Purpose   : handles QDragLeaveEvents.
// Comments  : See docu for details.
void QCameraDropSite::dragLeaveEvent(QDragLeaveEvent *pqEvent)
/*********************************************************************/
{
  setFrameStyle(QFrame::Raised + QFrame::WinPanel);
}



// Function  : dropEvent
// Parameters: QDropEvent *pqEvent
// Purpose   : handles QDropEvents.
// Comments  : See docu for details.
void QCameraDropSite::dropEvent(QDropEvent *pqEvent)
/*********************************************************************/
{
  CCamera cCamera;

  if (pqEvent->source() != this) {
    if ( QCameraDrag::decode(pqEvent, cCamera) ) {
      emit(sigCameraDropped(cCamera));
    }
  }

  setFrameStyle(QFrame::Raised + QFrame::WinPanel);
}



// Function  : mousePressEvent
// Parameters: QMouseEvent *pqEvent
// Purpose   : handles mouse press events.
// Comments  : See docu for details.
void QCameraDropSite::mousePressEvent(QMouseEvent *pqEvent)
/*********************************************************************/
{
  QDragObject *pqDragObject;

  if (m_pCamera !=NULL) {
    setFrameStyle(QFrame::Sunken + QFrame::WinPanel);  
    pqDragObject = new QCameraDrag(m_pCamera, this);
    pqDragObject->setPixmap(QPixmap(QCameraDrag::picture_xpm),QPoint(8,8));
    pqDragObject->dragCopy();
  }
}



// Function  : mouseReleaseEvent
// Parameters: QMouseEvent *pqEvent
// Purpose   : handles mouse release events.
// Comments  : See docu for details.
void QCameraDropSite::mouseReleaseEvent(QMouseEvent *pqEvent)
/*********************************************************************/
{
  setFrameStyle(QFrame::Raised + QFrame::WinPanel);
}