okular/ui/pagesizelabel.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Albert Astals Cid <aacid@kde.org>               *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  ***************************************************************************/
   9
  10 #include "pagesizelabel.h"
  11
  12 #include "core/document.h"
  13
  14 PageSizeLabel::PageSizeLabel( QWidget * parent, Okular::Document * document )
  15     : QLabel( parent ), m_document( document ),
  16     m_currentPage( -1 ), m_antiWidget( NULL )
  17 {
  18 }
  19
  20 PageSizeLabel::~PageSizeLabel()
  21 {
  22     m_document->removeObserver( this );
  23 }
  24
  25 QWidget *PageSizeLabel::antiWidget()
  26 {
  27     if (!m_antiWidget)
  28     {
  29         m_antiWidget = new QWidget(qobject_cast<QWidget*>(parent()));
  30         m_antiWidget->resize(0, 0);
  31     }
  32     return m_antiWidget;
  33 }
  34
  35 void PageSizeLabel::notifySetup( const QVector< Okular::Page * > & pageVector, int setupFlags )
  36 {
  37     // only process data when document changes
  38     if ( !( setupFlags & Okular::DocumentObserver::DocumentChanged ) )
  39         return;
  40
  41     // if document is closed or all pages have size hide widget
  42     int pages = pageVector.count();
  43     if ( pages < 1 || m_document->allPagesSize().isValid() )
  44     {
  45         hide();
  46         if ( m_antiWidget )
  47             m_antiWidget->hide();
  48         return;
  49     }
  50     else
  51     {
  52         show();
  53         if ( m_antiWidget )
  54             m_antiWidget->show();
  55     }
  56 }
  57
  58 void PageSizeLabel::notifyViewportChanged( bool /*smoothMove*/ )
  59 {
  60     if (isVisible())
  61     {
  62         // get current page number
  63         int page = m_document->viewport().pageNumber;
  64         int pages = m_document->pages();
  65
  66         // if the document is opened and page is changed
  67         if ( page != m_currentPage && pages > 0 )
  68         {
  69             m_currentPage = page;
  70             setText( m_document->pageSizeString(page) );
  71             m_antiWidget->setFixedSize(sizeHint());
  72         }
  73    }
  74 }
  75
  76 #include "pagesizelabel.moc"