src/pixmapviewer.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005 Eyal Lotem <eyal.lotem@gmail.com>                  *
   3  *   Copyright (C) 2005 Alexandre Oliveira <aleprj@gmail.com>              *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Steet, Fifth Floor, Boston, MA  02110-1301, USA.          *
  19  ***************************************************************************/
  20 #include "pixmapviewer.h"
  21 #include <kapplication.h>
  22 #include <QPainter>
  23 #include <QPixmap>
  24 //Added by qt3to4:
  25 #include <QMouseEvent>
  26 #include <QDesktopWidget>
  27
  28 PixmapViewer::PixmapViewer(QWidget *widget, const QPixmap &pixmap)
  29     : Q3ScrollView(widget, 0, Qt::WNoAutoErase)
  30     , m_isDragging(false)
  31     , m_pixmap(pixmap)
  32 {
  33     resizeContents( m_pixmap.width(), m_pixmap.height() );
  34 }
  35
  36 void PixmapViewer::drawContents( QPainter * p, int clipx, int clipy, int clipw, int cliph ) {
  37     p->drawPixmap(QPoint(clipx, clipy),
  38                   m_pixmap,
  39                   QRect(clipx, clipy, clipw, cliph));
  40 }
  41
  42 void PixmapViewer::contentsMousePressEvent(QMouseEvent *event) {
  43     if(Qt::LeftButton == event->button()) {
  44         m_currentPos = event->globalPos();
  45         m_isDragging = true;
  46     }
  47 }
  48
  49 void PixmapViewer::contentsMouseReleaseEvent(QMouseEvent *event) {
  50     if(Qt::LeftButton == event->button()) {
  51         m_currentPos = event->globalPos();
  52         m_isDragging = false;
  53     }
  54 }
  55
  56 void PixmapViewer::contentsMouseMoveEvent(QMouseEvent *event) {
  57     if(m_isDragging) {
  58         QPoint delta = m_currentPos - event->globalPos();
  59         scrollBy(delta.x(), delta.y());
  60         m_currentPos = event->globalPos();
  61     }
  62 }
  63
  64 QSize PixmapViewer::maximalSize() {
  65     return m_pixmap.size().boundedTo( KApplication::desktop()->size() ) + size() - viewport()->size();
  66 }
  67
  68 #include "pixmapviewer.moc"