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 Street, Fifth Floor, Boston, MA  02110-1301, USA.          *
  19  ***************************************************************************/
  20 #include "pixmapviewer.h"
  21
  22 #include <KApplication>
  23
  24 #include <QDesktopWidget>
  25 #include <QMouseEvent>
  26 #include <QPainter>
  27 #include <QPixmap>
  28
  29
  30 PixmapViewer::PixmapViewer(QWidget *widget, const QPixmap &pixmap)
  31     : Q3ScrollView(widget, 0, Qt::WNoAutoErase)
  32     , m_isDragging(false)
  33     , m_pixmap(pixmap)
  34 {
  35     resizeContents( m_pixmap.width(), m_pixmap.height() );
  36 }
  37
  38 void PixmapViewer::drawContents( QPainter * p, int clipx, int clipy, int clipw, int cliph ) {
  39     p->drawPixmap(QPoint(clipx, clipy),
  40                   m_pixmap,
  41                   QRect(clipx, clipy, clipw, cliph));
  42 }
  43
  44 void PixmapViewer::contentsMousePressEvent(QMouseEvent *event) {
  45     if(Qt::LeftButton == event->button()) {
  46         m_currentPos = event->globalPos();
  47         m_isDragging = true;
  48     }
  49 }
  50
  51 void PixmapViewer::contentsMouseReleaseEvent(QMouseEvent *event) {
  52     if(Qt::LeftButton == event->button()) {
  53         m_currentPos = event->globalPos();
  54         m_isDragging = false;
  55     }
  56 }
  57
  58 void PixmapViewer::contentsMouseMoveEvent(QMouseEvent *event) {
  59     if(m_isDragging) {
  60         QPoint delta = m_currentPos - event->globalPos();
  61         scrollBy(delta.x(), delta.y());
  62         m_currentPos = event->globalPos();
  63     }
  64 }
  65
  66 QSize PixmapViewer::maximalSize() {
  67     return m_pixmap.size().boundedTo( KApplication::desktop()->size() ) + size() - viewport()->size();
  68 }
  69
  70 #include "pixmapviewer.moc"