src/ui-mobile/view-graber.cpp

   1 /*
   2  *   Copyright (C) 2011 Lukáš Karas <lukas.karas@centrum.cz>
   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  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  */
  19
  20 #include <qt4/QtOpenGL/qgl.h>
  21 #include <QGraphicsScene>
  22 #include <qt4/QtDeclarative/qdeclarativeitem.h>
  23
  24 #include "view-graber.h"
  25
  26 ViewGraber::ViewGraber(QDeclarativeItem *parent) :
  27 QDeclarativeItem(parent),
  28 scheduledSnapshot(false),
  29 paintSnapshot(false) {
  30
  31 }
  32
  33 ViewGraber::~ViewGraber() {
  34   //qDebug() << "ViewGraber: destroyed";
  35 }
  36
  37 void ViewGraber::takeSnapshot() {
  38   //QDeclarativeItem *parent = parentItem();
  39   if (!_delegate)
  40     return;
  41
  42   scheduledSnapshot = true;
  43   paintSnapshot = true;
  44
  45   setFlag(QGraphicsItem::ItemHasNoContents, false);
  46   update(_delegate->boundingRect());
  47 }
  48
  49 void ViewGraber::releaseSnapshot() {
  50   paintSnapshot = false;
  51 }
  52
  53 void ViewGraber::paint(QPainter *painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) {
  54   Q_UNUSED(option);
  55
  56   if (!_delegate)
  57     return;
  58
  59   if (scheduledSnapshot) {
  60     QGLWidget *qgl = reinterpret_cast<QGLWidget *> (widget);
  61     if (!qgl) {
  62       qWarning() << "ViewGraber: cast" << widget << "to QGLWidget failed";
  63       return;
  64     }
  65
  66     _delegate->paint(painter, option, widget);
  67     scheduledSnapshot = false;
  68     snapshot = qgl->grabFrameBuffer(false);
  69     qDebug() << "MyWebView: take snapshot ";
  70     emit snapshotTaken();
  71   }
  72
  73   if (!paintSnapshot)
  74     return;
  75
  76   QPointF sceneMapRect = _delegate->mapToScene(0, 0);
  77   QPointF selfMapRect = ((QGraphicsItem*) _delegate)->mapToItem((QGraphicsItem*) this, QPointF(0, 0));
  78   //rect = this->scene()->mapToItem(this, rect);
  79   //qDebug() << "MyWebView: paint" << sceneMapRect << selfMapRect;
  80   painter->drawImage((sceneMapRect.x() - selfMapRect.x()) *-1, (sceneMapRect.y() - selfMapRect.y()) *-1, snapshot);
  81 }
  82
  83 #include "view-graber.moc"