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 #include "kdenlivesettings.h"
  23
  24 #include <KDebug>
  25
  26 #include <QPaintEvent>
  27
  28 VideoPreviewContainer::VideoPreviewContainer(QWidget *parent) :
  29     QFrame(parent),
  30     m_dar(1.0),
  31     m_refresh(false)
  32 {
  33     setFrameShape(QFrame::NoFrame);
  34     setFocusPolicy(Qt::ClickFocus);
  35     setAttribute(Qt::WA_PaintOnScreen);
  36     setAttribute(Qt::WA_OpaquePaintEvent);
  37     setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
  38     connect(&m_refreshTimer, SIGNAL(timeout()), this, SLOT(update()));
  39     m_refreshTimer.setSingleShot(false);
  40     m_refreshTimer.setInterval(200);
  41 }
  42
  43 VideoPreviewContainer::~VideoPreviewContainer()
  44 {
  45     qDeleteAll(m_imageQueue);
  46 }
  47
  48 //virtual
  49 void VideoPreviewContainer::resizeEvent( QResizeEvent * /*event*/ )
  50 {
  51     updateDisplayZone();
  52 }
  53
  54 void VideoPreviewContainer::setRatio(double ratio)
  55 {
  56     m_dar = ratio;
  57     updateDisplayZone();
  58 }
  59
  60
  61 void VideoPreviewContainer::updateDisplayZone()
  62 {
  63     QRect rect = this->frameRect();
  64     int paintW = rect.height() * m_dar + 0.5;
  65     if (paintW > rect.width()) {
  66         int paintH = rect.width() / m_dar + 0.5;
  67         int diff = (rect.height() - paintH)  / 2;
  68         rect.adjust(0, diff, 0, 0);
  69         rect.setHeight(paintH);
  70     }
  71     else {
  72         int diff = (rect.width() - paintW)  / 2;
  73         rect.adjust(diff, 0, 0, 0);
  74         rect.setWidth(paintW);
  75     }
  76     m_displayRect = rect;
  77     m_refresh = true;
  78 }
  79
  80 void VideoPreviewContainer::setImage(QImage img)
  81 {
  82     if (m_imageQueue.count() > 2) {
  83         delete m_imageQueue.takeLast();
  84     }
  85     m_imageQueue.prepend(new QImage(img));
  86     update();
  87 }
  88
  89 void VideoPreviewContainer::stop()
  90 {
  91     //m_refreshTimer.stop();
  92     qDeleteAll(m_imageQueue);
  93     m_imageQueue.clear();
  94 }
  95
  96 void VideoPreviewContainer::start()
  97 {
  98     //m_refreshTimer.start();
  99 }
 100
 101 // virtual
 102 void VideoPreviewContainer::paintEvent(QPaintEvent *event)
 103 {
 104     if (m_imageQueue.isEmpty()) return;
 105     QImage *img = m_imageQueue.takeFirst();
 106     QPainter painter(this);
 107     if (m_refresh) {
 108         painter.fillRect(event->rect(), QColor(KdenliveSettings::window_background()));
 109         m_refresh = false;
 110     }
 111     painter.drawImage(m_displayRect, *img);
 112     delete img;
 113 }
 114
 115