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qgscomposerhtml.cpp
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qgscomposerhtml.cpp
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/***************************************************************************
qgscomposerhtml.cpp
------------------------------------------------------------
begin : July 2012
copyright : (C) 2012 by Marco Hugentobler
email : marco dot hugentobler at sourcepole dot ch
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgscomposerhtml.h"
#include "qgscomposerframe.h"
#include "qgscomposition.h"
#include "qgsaddremovemultiframecommand.h"
#include <QCoreApplication>
#include <QImage>
#include <QPainter>
#include <QWebFrame>
#include <QWebPage>
QgsComposerHtml::QgsComposerHtml( QgsComposition* c, qreal x, qreal y, qreal width, qreal height, bool addCommands ): QgsComposerMultiFrame( c ), mWebPage( 0 ),
mLoaded( false ), mHtmlUnitsToMM( 1.0 )
{
mHtmlUnitsToMM = htmlUnitsToMM();
mWebPage = new QWebPage();
QObject::connect( mWebPage, SIGNAL( loadFinished( bool ) ), this, SLOT( frameLoaded( bool ) ) );
if ( mComposition && width > 0 && height > 0 )
{
if ( addCommands )
{
QgsAddRemoveMultiFrameCommand* c = new QgsAddRemoveMultiFrameCommand( QgsAddRemoveMultiFrameCommand::Added, this, mComposition, tr( "HTML added" ), 0 );
mComposition->undoStack()->push( c );
}
QgsComposerFrame* frame = new QgsComposerFrame( c, this, x, y, width, height );
addFrame( frame, addCommands );
QObject::connect( mComposition, SIGNAL( itemRemoved( QgsComposerItem* ) ), this, SLOT( handleFrameRemoval( QgsComposerItem* ) ) );
recalculateFrameSizes();
}
}
QgsComposerHtml::QgsComposerHtml(): QgsComposerMultiFrame( 0 ), mWebPage( 0 ), mLoaded( false ), mHtmlUnitsToMM( 1.0 )
{
}
QgsComposerHtml::~QgsComposerHtml()
{
delete mWebPage;
}
void QgsComposerHtml::setUrl( const QUrl& url )
{
if ( !mWebPage )
{
return;
}
mLoaded = false;
mUrl = url;
mWebPage->mainFrame()->load( mUrl );
while ( !mLoaded )
{
qApp->processEvents();
}
QSize contentsSize = mWebPage->mainFrame()->contentsSize();
mWebPage->setViewportSize( contentsSize );
mSize.setWidth( contentsSize.width() / mHtmlUnitsToMM );
mSize.setHeight( contentsSize.height() / mHtmlUnitsToMM );
recalculateFrameSizes();
emit changed();
}
void QgsComposerHtml::frameLoaded( bool ok )
{
Q_UNUSED( ok );
mLoaded = true;
}
QSizeF QgsComposerHtml::totalSize() const
{
return mSize;
}
void QgsComposerHtml::render( QPainter* p, const QRectF& renderExtent )
{
if ( !mWebPage )
{
return;
}
p->save();
p->scale( 1.0 / mHtmlUnitsToMM, 1.0 / mHtmlUnitsToMM );
p->translate( 0.0, -renderExtent.top() * mHtmlUnitsToMM );
mWebPage->mainFrame()->render( p, QRegion( renderExtent.left(), renderExtent.top() * mHtmlUnitsToMM, renderExtent.width() * mHtmlUnitsToMM, renderExtent.height() * mHtmlUnitsToMM ) );
p->restore();
}
double QgsComposerHtml::htmlUnitsToMM()
{
if ( !mComposition )
{
return 1.0;
}
QImage img( 1, 1, QImage::Format_ARGB32_Premultiplied );
double pixelPerMM = mComposition->printResolution() / 25.4;
return ( pixelPerMM / ( img.dotsPerMeterX() / 1000.0 ) );
}
void QgsComposerHtml::addFrame( QgsComposerFrame* frame, bool addCommand )
{
mFrameItems.push_back( frame );
QObject::connect( frame, SIGNAL( sizeChanged() ), this, SLOT( recalculateFrameSizes() ) );
if ( mComposition )
{
mComposition->addComposerHtmlFrame( this, frame );
if ( addCommand )
{
mComposition->pushAddRemoveCommand( frame, tr( "Add Html frame" ) );
}
}
}
bool QgsComposerHtml::writeXML( QDomElement& elem, QDomDocument & doc, bool ignoreFrames ) const
{
QDomElement htmlElem = doc.createElement( "ComposerHtml" );
htmlElem.setAttribute( "url", mUrl.toString() );
bool state = _writeXML( htmlElem, doc, ignoreFrames );
elem.appendChild( htmlElem );
return state;
}
bool QgsComposerHtml::readXML( const QDomElement& itemElem, const QDomDocument& doc, bool ignoreFrames )
{
QString urlString = itemElem.attribute( "url" );
if ( !urlString.isEmpty() )
{
setUrl( QUrl( urlString ) );
}
return _readXML( itemElem, doc, ignoreFrames );
}