#include <QtGui>
#include "VSmallView.h"
#include "VFrame.h"

VSmallView::VSmallView(QWidget * parent):
   QGraphicsView(parent)
{
   setCursor(Qt::CrossCursor);
   
   fFrame = new VFrame(this);
 
   connect(fFrame, SIGNAL(changed(const QRect&)),
           this, SLOT(frameChanged(const QRect&))); 
   
   setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
   setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);    
}


//VSmallView::~VSmallView()
//{

//}


void VSmallView::setScene(QGraphicsScene * scene)
{
   QGraphicsView::setScene(scene);
   
   connect(scene, SIGNAL(changed(const QList<QRectF> &)),
           this, SLOT(fitSceneToView()));     
}

void VSmallView::fitSceneToView()
{
   QRectF rect = scene()->itemsBoundingRect();
   
   if (rect.width() == 0. || rect.height() == 0.) return;
   
   //QRectF rect = scene()->sceneRect();
   QRect rect1 = contentsRect();
   double scaleX = double(rect1.width()) / double(rect.width());
   double scaleY = double(rect1.height()) / double(rect.height());
   
   QMatrix matrix;
   if (scaleX <= scaleY) {
      matrix.scale(scaleX, scaleX);
   } else {
      matrix.scale(scaleY, scaleY);
   }    
   setMatrix(matrix);
}

void VSmallView::updateFrame(const QRectF& rect)
{
   QPolygon pol = mapFromScene(rect);
   QRect rect1 = pol.boundingRect();
   fFrame->setGeometry(rect1);
   fFrame->setMaskRegion();
}

void VSmallView::frameChanged(const QRect& rect)
{
   QPolygonF pol = mapToScene(rect);

   emit rectChanged(pol.boundingRect());
}


void VSmallView::mousePressEvent(QMouseEvent *event)
{
   if (event->button() == Qt::LeftButton) {
      
      fFrame->setGeometry(event->x() - fFrame->width()/2, event->y() - fFrame->height()/2,
                         fFrame->width(), fFrame->height());

      QPolygonF pol = mapToScene(fFrame->geometry());

      emit rectChanged(pol.boundingRect());
                      
   }
}