git.sesse.net Git - kdenlive/blob - src/abstractmonitor.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Jean-Baptiste Mardelle (jb@kdenlive.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  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  18  ***************************************************************************/
  19
  20
  21 #include "abstractmonitor.h"
  22
  23 #include <KDebug>
  24
  25 VideoPreviewContainer::VideoPreviewContainer(QWidget *parent) :
  26     QFrame(parent)
  27 {
  28     setFrameShape(QFrame::NoFrame);
  29     setFocusPolicy(Qt::ClickFocus);
  30     setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
  31     connect(&m_refreshTimer, SIGNAL(timeout()), this, SLOT(update()));
  32     m_refreshTimer.setSingleShot(false);
  33     m_refreshTimer.setInterval(200);
  34 }
  35
  36 VideoPreviewContainer::~VideoPreviewContainer()
  37 {
  38     qDeleteAll(m_imageQueue);
  39 }
  40
  41
  42 void VideoPreviewContainer::setImage(QImage img)
  43 {
  44     if (m_imageQueue.count() > 2) {
  45         delete m_imageQueue.takeLast();//replace(10, new QImage(img));
  46     }
  47     m_imageQueue.prepend(new QImage(img));
  48 }
  49
  50 void VideoPreviewContainer::stop()
  51 {
  52     m_refreshTimer.stop();
  53     qDeleteAll(m_imageQueue);
  54     m_imageQueue.clear();
  55 }
  56
  57 void VideoPreviewContainer::start()
  58 {
  59     m_refreshTimer.start();
  60 }
  61
  62 // virtual
  63 void VideoPreviewContainer::paintEvent(QPaintEvent */*event*/)
  64 {
  65         if (m_imageQueue.isEmpty()) return;
  66         QImage *img = m_imageQueue.takeFirst();
  67         QPainter painter(this);
  68         double ar = (double) img->width() / img->height();
  69         QRect rect = this->frameRect();
  70         int paintW = rect.height() * ar + 0.5;
  71         if (paintW > rect.width()) {
  72             paintW = rect.width() / ar + 0.5;
  73             int diff = (rect.height() - paintW)  / 2;
  74             rect.adjust(0, diff, 0, 0);
  75             rect.setHeight(paintW);
  76         }
  77         else {
  78             int diff = (rect.width() - paintW)  / 2;
  79             rect.adjust(diff, 0, 0, 0);
  80             rect.setWidth(paintW);
  81         }
  82
  83         painter.drawImage(rect, *img);
  84         delete img;
  85 }
  86
  87