SubalbumsIconView Class Reference

Extension of iconview, used to list all subalbums in album. Supports drag-n-drop within iconview such that subalbums can be reordered, as well as dropping photos from subalbums to allow photos to be moved from one subalbum to another. More...

#include <subalbumsIconView.h>

Inheritance diagram for SubalbumsIconView:

Collaboration diagram for SubalbumsIconView:

Signals
void	itemHasMoved ()

Public Member Functions
	SubalbumsIconView (QWidget *parent)
int	getTextWidth ()
QSize	minimumSizeHint () const
QSize	sizeHint () const

Protected Member Functions
void	drawContents (QPainter *p, int clipx, int clipy, int clipw, int cliph)
Q3DragObject *	dragObject ()
void	contentsMousePressEvent (QMouseEvent *e)
void	contentsDragMoveEvent (QDragMoveEvent *e)

Private Slots
void	repaintGroup (Q3IconViewItem *pseudoSelection)
void	clearPseudoSelection ()

Private Member Functions
void	contentsDropEvent (QDropEvent *e)

Private Attributes
QPixmap	bufferPixmap
QPoint	dragStartPos
SubalbumPreviewWidget *	currentPseudoSelection
int	textWidth

Detailed Description

Extension of iconview, used to list all subalbums in album. Supports drag-n-drop within iconview such that subalbums can be reordered, as well as dropping photos from subalbums to allow photos to be moved from one subalbum to another.

Definition at line 36 of file subalbumsIconView.h.

Constructor & Destructor Documentation

SubalbumsIconView()

SubalbumsIconView::SubalbumsIconView

(

QWidget *

parent

)

Definition at line 32 of file subalbumsIconView.cpp.

                                                      : Q3IconView( parent )
{
//  setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Minimum);
  setMouseTracking(true);
 
  currentPseudoSelection = NULL;
 
  //connect mouse over events to paint pseudo selection in ligher blue
  connect( this, SIGNAL(onItem(Q3IconViewItem*)),
                this, SLOT(repaintGroup(Q3IconViewItem*)) );
 
  //clear any pseudo selection when mouse moves off icons
  connect( this, SIGNAL(onViewport()),
                this, SLOT(clearPseudoSelection()) );
 
  //compute textWidth for collection names using a calibration string
  QString calibrationString( qApp->translate("SubalbumPreviewWidget", "Calibration String") );
  QFontMetrics fm( qApp->font() );
  textWidth = fm.width( calibrationString );
}

References clearPseudoSelection(), currentPseudoSelection, repaintGroup(), and textWidth.

Member Function Documentation

clearPseudoSelection

void SubalbumsIconView::clearPseudoSelection ( )

privateslot

Definition at line 171 of file subalbumsIconView.cpp.

{
  //if old pseudo selection unselect it
  if(currentPseudoSelection != NULL)
  {
    currentPseudoSelection->setMousedOver(false);
    repaintItem(currentPseudoSelection);
    currentPseudoSelection = NULL;
  }
}

References currentPseudoSelection, and SubalbumPreviewWidget::setMousedOver().

Referenced by repaintGroup(), and SubalbumsIconView().

contentsDragMoveEvent()

void SubalbumsIconView::contentsDragMoveEvent ( QDragMoveEvent * e )

protected

Definition at line 115 of file subalbumsIconView.cpp.

{
  Q3IconView::contentsDragMoveEvent( e );
   e->accept(true);
 
   //if source of drag is not from application then return
   if(e->source() == NULL)
     return;
 
  //if source of drag is from within this view then return, in the future we'll put
  //drag code in here to drag indicators for rearranging the items of the iconview
  if(e->source() == viewport() )
  {
 
  }
  //else if source is from photos iconview
  else if(e->source()->parentWidget() == ((LayoutWidget*)parentWidget()->parentWidget())->getSubalbum()->getPhotos() )
  {
    SubalbumPreviewWidget* item = (SubalbumPreviewWidget*)findItem( e->pos() );
 
    //if item pointer same as current pseudo selection ignore
    if(item == currentPseudoSelection)
    {
      return;
    }
 
    //unpaint old selection
    if(currentPseudoSelection != NULL)
    {
      currentPseudoSelection->setMousedOver(false);
      repaintItem(currentPseudoSelection);
    }
 
    //set new selection
    currentPseudoSelection = item;
 
    //repaint new selection
    if(currentPseudoSelection != NULL)
    {
      currentPseudoSelection->setMousedOver(true);
      repaintItem(currentPseudoSelection);
    }
  }
}

References currentPseudoSelection, and SubalbumPreviewWidget::setMousedOver().

contentsDropEvent()

void SubalbumsIconView::contentsDropEvent ( QDropEvent * e )

private

Definition at line 53 of file subalbumsIconView.cpp.

{
  Q3IconView::contentsDropEvent( e );
 
   //if drop originated from this viewport then emit item moved signal
  if(e->source() == viewport() )
    emit itemHasMoved();
}

References itemHasMoved().

contentsMousePressEvent()

void SubalbumsIconView::contentsMousePressEvent ( QMouseEvent * e )

protected

Definition at line 75 of file subalbumsIconView.cpp.

{
  //ignore all clicks other than left-clicks
  if( e->button() != Qt::LeftButton ) return;
 
  dragStartPos = e->pos();
  Q3IconView::contentsMousePressEvent( e );
}

References dragStartPos.

dragObject()

Q3DragObject * SubalbumsIconView::dragObject ( )

protected

Definition at line 84 of file subalbumsIconView.cpp.

{
  //no item selected?
  if( !currentItem() )
    return 0;
 
  //create drag object
  Q3IconDrag *drag = new Q3IconDrag( viewport() );
 
  //create buffer and paint item to buffer
  QRect r = currentItem()->rect();
  QPixmap buffer( r.width(), r.height() );
  QPainter painter( &buffer );
  painter.translate( -r.x(), -r.y() );
  ((SubalbumPreviewWidget*)currentItem())->paint( &painter );
 
  //clip off background color around edges which was used for anti-aliasing edges.
  //result image will have semi-selection oval around it.
  QBitmap bit = buffer.createHeuristicMask();
  buffer.setMask( bit );
 
  //set pixmap to use buffer
  drag->setPixmap( buffer, QPoint( dragStartPos.x() - r.x(), dragStartPos.y() - r.y() ) );
 
  //we don't want to show any rectangles, but if we don't append two null rectangles the last drag rectangles this iconview displayed
  //possibly form objects dropped onto it from outside the viewport, aka photos, will be drawn! :(
  drag->append( Q3IconDragItem(), QRect(), QRect() );
 
  return drag;
}

References buffer, and dragStartPos.

drawContents()

void SubalbumsIconView::drawContents ( QPainter * p, int clipx, int clipy, int clipw, int cliph )

protected

Definition at line 62 of file subalbumsIconView.cpp.

{
    if( bufferPixmap.size() != size())
    {  bufferPixmap.resize( size() ); }
    QPainter bufferPainter( &bufferPixmap );
    int xOffset = clipx - contentsX();
    int yOffset = clipy - contentsY();
 
    bufferPainter.translate( -contentsX(), -contentsY() );
    Q3IconView::drawContents( &bufferPainter, clipx, clipy, clipw, cliph );
    bitBlt(p->device(), xOffset, yOffset, &bufferPixmap, xOffset, yOffset, clipw, cliph );
}

References bufferPixmap.

getTextWidth()

int SubalbumsIconView::getTextWidth

(

)

Definition at line 182 of file subalbumsIconView.cpp.

{ return textWidth; }

References textWidth.

Referenced by SubalbumPreviewWidget::initializeItemRect(), and SubalbumPreviewWidget::setText().

itemHasMoved

void SubalbumsIconView::itemHasMoved ( )

signal

Referenced by contentsDropEvent().

minimumSizeHint()

QSize SubalbumsIconView::minimumSizeHint

(

)

const

Definition at line 185 of file subalbumsIconView.cpp.

{ return sizeHint(); }

References sizeHint().

repaintGroup

void SubalbumsIconView::repaintGroup ( Q3IconViewItem * pseudoSelection )

privateslot

Definition at line 160 of file subalbumsIconView.cpp.

{
  //if old pseudo selection unselect it
  clearPseudoSelection();
 
  //paint new selection
  currentPseudoSelection = (SubalbumPreviewWidget*)pseudoSelection;
  currentPseudoSelection->setMousedOver(true);
  repaintItem(currentPseudoSelection);
}

References clearPseudoSelection(), currentPseudoSelection, and SubalbumPreviewWidget::setMousedOver().

Referenced by SubalbumsIconView().

sizeHint()

QSize SubalbumsIconView::sizeHint

(

)

const

Definition at line 187 of file subalbumsIconView.cpp.

{
  QSize s = Q3IconView::sizeHint();
  
  //find max item width
  s.setWidth(0);
  Q3IconViewItem *item;
  for( item = firstItem(); item != NULL; item = item->nextItem() )
  {
    if(item->width() > s.width() )
      s.setWidth( item->width() );
  } 
  s.setWidth( s.width() + 2*spacing() + verticalScrollBar()->sizeHint().width() );
  return s;
}

References sizeHint(), and width.

Referenced by minimumSizeHint(), and sizeHint().

Member Data Documentation

bufferPixmap

QPixmap SubalbumsIconView::bufferPixmap

private

Definition at line 64 of file subalbumsIconView.h.

Referenced by drawContents().

currentPseudoSelection

SubalbumPreviewWidget* SubalbumsIconView::currentPseudoSelection

private

Definition at line 66 of file subalbumsIconView.h.

Referenced by clearPseudoSelection(), contentsDragMoveEvent(), repaintGroup(), and SubalbumsIconView().

dragStartPos

QPoint SubalbumsIconView::dragStartPos

private

Definition at line 65 of file subalbumsIconView.h.

Referenced by contentsMousePressEvent(), and dragObject().

textWidth

int SubalbumsIconView::textWidth

private

Definition at line 70 of file subalbumsIconView.h.

Referenced by getTextWidth(), and SubalbumsIconView().

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The documentation for this class was generated from the following files:

• subalbumsIconView.h
• subalbumsIconView.cpp