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qgscomposerlabel.cpp
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qgscomposerlabel.cpp
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/***************************************************************************
qgscomposerlabel.cpp
-------------------
begin : January 2005
copyright : (C) 2005 by Radim Blazek
email : blazek@itc.it
***************************************************************************/
/***************************************************************************
* *
* 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 "qgscomposerlabel.h"
#include <QDomElement>
#include <QPainter>
QgsComposerLabel::QgsComposerLabel( QgsComposition *composition ): QgsComposerItem( composition ), mMargin( 0.0 )
{
//default font size is 10 point
if ( mComposition )
{
mFont.setPixelSize( mComposition->pixelFontSize( 10 ) );
}
else
{
mFont.setPixelSize( 4 );
}
}
QgsComposerLabel::~QgsComposerLabel()
{
}
void QgsComposerLabel::paint( QPainter* painter, const QStyleOptionGraphicsItem* itemStyle, QWidget* pWidget )
{
if ( !painter )
{
return;
}
drawBackground( painter );
painter->setPen( QPen( QColor( 0, 0, 0 ) ) ); //draw all text black
painter->setFont( mFont );
QFontMetricsF fontSize( mFont );
//support multiline labels
double penWidth = pen().widthF();
QRectF painterRect(penWidth, penWidth, rect().width() - 2 * penWidth, \
rect().height() - 2 * penWidth);
painter->drawText(painterRect, Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap, mText);
drawFrame( painter );
if ( isSelected() )
{
drawSelectionBoxes( painter );
}
}
void QgsComposerLabel::setText( const QString& text )
{
mText = text;
}
void QgsComposerLabel::setFont( const QFont& f )
{
//set font size in pixels for proper preview and printout
if ( mComposition )
{
int pixelSize = mComposition->pixelFontSize( f.pointSizeF() );
mFont = f;
mFont.setPixelSize( pixelSize );
}
else
{
mFont = f;
}
}
void QgsComposerLabel::adjustSizeToText()
{
QFontMetricsF fontInfo( mFont );
setSceneRect( QRectF( transform().dx(), transform().dy(), fontInfo.width( mText ) + 2 * mMargin + 2 * pen().widthF(), fontInfo.ascent() + 2 * mMargin + 2 * pen().widthF()) );
}
QFont QgsComposerLabel::font() const
{
if ( mComposition ) //make pixel to point conversion to show correct point value in dialogs
{
double pointSize = mComposition->pointFontSize( mFont.pixelSize() );
QFont returnFont = mFont;
returnFont.setPointSize( pointSize );
return returnFont;
}
return mFont;
}
bool QgsComposerLabel::writeXML( QDomElement& elem, QDomDocument & doc )
{
if ( elem.isNull() )
{
return false;
}
QDomElement composerLabelElem = doc.createElement( "ComposerLabel" );
composerLabelElem.setAttribute( "labelText", mText );
composerLabelElem.setAttribute( "margin", QString::number( mMargin ) );
//font
QDomElement labelFontElem = doc.createElement( "LabelFont" );
labelFontElem.setAttribute( "description", mFont.toString() );
composerLabelElem.appendChild( labelFontElem );
elem.appendChild( composerLabelElem );
return _writeXML( composerLabelElem, doc );
}
bool QgsComposerLabel::readXML( const QDomElement& itemElem, const QDomDocument& doc )
{
if ( itemElem.isNull() )
{
return false;
}
//restore label specific properties
//text
mText = itemElem.attribute( "labelText" );
//margin
mMargin = itemElem.attribute( "margin" ).toDouble();
//font
QDomNodeList labelFontList = itemElem.elementsByTagName( "LabelFont" );
if ( labelFontList.size() > 0 )
{
QDomElement labelFontElem = labelFontList.at( 0 ).toElement();
mFont.fromString( labelFontElem.attribute( "description" ) );
}
//restore general composer item properties
QDomNodeList composerItemList = itemElem.elementsByTagName( "ComposerItem" );
if ( composerItemList.size() > 0 )
{
QDomElement composerItemElem = composerItemList.at( 0 ).toElement();
_readXML( composerItemElem, doc );
}
return true;
}