Quantum GIS API Documentation  1.8
src/core/composer/qgssingleboxscalebarstyle.cpp
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00001 /***************************************************************************
00002                             qgssingleboxscalebarstyle.h
00003                             ------------------
00004     begin                : June 2008
00005     copyright            : (C) 2008 by Marco Hugentobler
00006     email                : marco.hugentobler@karto.baug.ethz.ch
00007  ***************************************************************************/
00008 /***************************************************************************
00009  *                                                                         *
00010  *   This program is free software; you can redistribute it and/or modify  *
00011  *   it under the terms of the GNU General Public License as published by  *
00012  *   the Free Software Foundation; either version 2 of the License, or     *
00013  *   (at your option) any later version.                                   *
00014  *                                                                         *
00015  ***************************************************************************/
00016 
00017 #include "qgssingleboxscalebarstyle.h"
00018 #include "qgscomposerscalebar.h"
00019 #include <QList>
00020 #include <QPainter>
00021 
00022 QgsSingleBoxScaleBarStyle::QgsSingleBoxScaleBarStyle( const QgsComposerScaleBar* bar ): QgsScaleBarStyle( bar )
00023 {
00024 
00025 }
00026 
00027 QgsSingleBoxScaleBarStyle::QgsSingleBoxScaleBarStyle(): QgsScaleBarStyle( 0 )
00028 {
00029 
00030 }
00031 
00032 QgsSingleBoxScaleBarStyle::~QgsSingleBoxScaleBarStyle()
00033 {
00034   //nothing to do...
00035 }
00036 
00037 void QgsSingleBoxScaleBarStyle::draw( QPainter* p, double xOffset ) const
00038 {
00039   if ( !mScaleBar )
00040   {
00041     return;
00042   }
00043   double barTopPosition = mScaleBar->fontAscentMillimeters( mScaleBar->font() ) + mScaleBar->labelBarSpace() + mScaleBar->boxContentSpace();
00044 
00045   p->save();
00046   p->setPen( p->pen() );
00047 
00048   QList<QPair<double, double> > segmentInfo;
00049   mScaleBar->segmentPositions( segmentInfo );
00050 
00051   bool useColor = true; //alternate brush color/white
00052 
00053   QList<QPair<double, double> >::const_iterator segmentIt = segmentInfo.constBegin();
00054   for ( ; segmentIt != segmentInfo.constEnd(); ++segmentIt )
00055   {
00056     if ( useColor ) //alternating colors
00057     {
00058       p->setBrush( mScaleBar->brush() );
00059     }
00060     else //white
00061     {
00062       p->setBrush( QColor( 255, 255, 255 ) );
00063     }
00064 
00065     QRectF segmentRect( segmentIt->first + xOffset, barTopPosition, segmentIt->second, mScaleBar->height() );
00066     p->drawRect( segmentRect );
00067     useColor = !useColor;
00068   }
00069 
00070   p->restore();
00071 
00072   //draw labels using the default method
00073   drawLabels( p );
00074 }
00075 
00076 QString QgsSingleBoxScaleBarStyle::name() const
00077 {
00078   return "Single Box";
00079 }
00080 
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