trash.cc

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/*===========================================================================*\
*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
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\*===========================================================================*/

//== INCLUDES =================================================================
#include <QPixmap>
#include <QGraphicsItem>
#include <QGraphicsSceneMouseEvent>

#include <OpenFlipper/common/GlobalOptions.hh>

#include "trash.hh"
#include "graphicsScene.hh"
#include "sceneElement.hh"

//== NAMESPACES ===============================================================
namespace VSI {

//=============================================================================
//
//  CLASS VSI::Trash - IMPLEMENTATION
//
//=============================================================================


Trash::Trash (GraphicsScene *_scene, QGraphicsItem *_parent) :
  QGraphicsPixmapItem (_parent),
  scene_ (_scene)
{
  setPixmap (OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"user-trash.png");

  setOpacity (0.4);

  setAcceptHoverEvents (true);
}

//------------------------------------------------------------------------------

Trash::~Trash ()
{
}

//------------------------------------------------------------------------------

// make the trash opaque if mouse is over and we have selected elements
void Trash::hoverEnterEvent (QGraphicsSceneHoverEvent * /*_event*/)
{
  if (!scene_->selectedItems ().isEmpty ())
    setOpacity (1.0);
}

//------------------------------------------------------------------------------

// make trash transparent on mouse leave
void Trash::hoverLeaveEvent (QGraphicsSceneHoverEvent * /*_event*/)
{
  setOpacity (0.4);
}

//------------------------------------------------------------------------------

// delete selected elements on mouse press
void Trash::mousePressEvent (QGraphicsSceneMouseEvent * /*_event*/)
{
  if (!scene_->selectedItems ().isEmpty ())
    foreach (QGraphicsItem *e, scene_->selectedItems ())
    {
      SceneElement *se = dynamic_cast<SceneElement *> (e);
      if (se && scene_->removeElement (se))
        delete se;
    }
}

//------------------------------------------------------------------------------

void Trash::activate ()
{
  setOpacity (1.0);
}

//------------------------------------------------------------------------------

void Trash::deactivate ()
{
  setOpacity (0.4);
}

//------------------------------------------------------------------------------

void Trash::setGeometry (const QRectF &_rect)
{
  QGraphicsPixmapItem::setPos (_rect.topLeft ());
  QGraphicsLayoutItem::setGeometry (_rect);
}

//------------------------------------------------------------------------------

// size information for layouting
QSizeF Trash::sizeHint (Qt::SizeHint _which, const QSizeF &/*_constraint*/) const
{
  QSizeF sh;
  switch (_which) {
    case Qt::MinimumSize:
    case Qt::PreferredSize:
    case Qt::MaximumSize:
      sh = QSizeF (pixmap ().width (), pixmap ().height ());
      break;
    default:
      break;
  }

  return sh;
}

//------------------------------------------------------------------------------
}