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 }
  35
  36 void ViewGraber::takeSnapshot() {
  37   //QDeclarativeItem *parent = parentItem();
  38   if (!_delegate)
  39     return;
  40
  41   scheduledSnapshot = true;
  42   paintSnapshot = true;
  43
  44   setFlag(QGraphicsItem::ItemHasNoContents, false);
  45   update(_delegate->boundingRect());
  46 }
  47
  48 void ViewGraber::releaseSnapshot() {
  49   paintSnapshot = false;
  50 }
  51
  52 void ViewGraber::paint(QPainter *painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) {
  53   Q_UNUSED(option);
  54
  55   if (!_delegate)
  56     return;
  57
  58   if (scheduledSnapshot) {
  59     QGLWidget *qgl = reinterpret_cast<QGLWidget *> (widget);
  60     if (!qgl) {
  61       qWarning() << "ViewGraber: cast" << widget << "to QGLWidget failed";
  62       return;
  63     }
  64
  65     _delegate->paint(painter, option, widget);
  66     scheduledSnapshot = false;
  67     snapshot = qgl->grabFrameBuffer(false);
  68     qDebug() << "MyWebView: take snapshot ";
  69     emit snapshotTaken();
  70   }
  71
  72   if (!paintSnapshot)
  73     return;
  74
  75   QPointF sceneMapRect = _delegate->mapToScene(0, 0);
  76   QPointF selfMapRect = ((QGraphicsItem*) _delegate)->mapToItem((QGraphicsItem*) this, QPointF(0, 0));
  77   //rect = this->scene()->mapToItem(this, rect);
  78   //qDebug() << "MyWebView: paint" << sceneMapRect << selfMapRect;
  79   painter->drawImage((sceneMapRect.x() - selfMapRect.x()) *-1, (sceneMapRect.y() - selfMapRect.y()) *-1, snapshot);
  80 }
  81
  82 #include "view-graber.moc"