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QString methods Using single quotes is a significant performance boost. Rough benchmarks indicate the QString single quote methods take about 15% of the time the double quote variants take.
138 lines
5.2 KiB
C++
138 lines
5.2 KiB
C++
/***************************************************************************
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qgsscalebarstyle.cpp
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--------------------
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begin : June 2008
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copyright : (C) 2008 by Marco Hugentobler
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email : marco.hugentobler@karto.baug.ethz.ch
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsscalebarstyle.h"
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#include "qgscomposerscalebar.h"
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#include "qgscomposerutils.h"
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#include <QFontMetricsF>
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#include <QPainter>
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QgsScaleBarStyle::QgsScaleBarStyle( const QgsComposerScaleBar* bar ): mScaleBar( bar )
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{
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}
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QgsScaleBarStyle::QgsScaleBarStyle(): mScaleBar( 0 )
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{
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}
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QgsScaleBarStyle::~QgsScaleBarStyle()
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{
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}
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void QgsScaleBarStyle::drawLabels( QPainter* p ) const
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{
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if ( !p || !mScaleBar )
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{
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return;
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}
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p->save();
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p->setFont( mScaleBar->font() );
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p->setPen( QPen( mScaleBar->fontColor() ) );
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QString firstLabel = mScaleBar->firstLabelString();
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double xOffset = QgsComposerUtils::textWidthMM( mScaleBar->font(), firstLabel ) / 2;
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//double mCurrentXCoord = mScaleBar->pen().widthF() + mScaleBar->boxContentSpace();
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QList<QPair<double, double> > segmentInfo;
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mScaleBar->segmentPositions( segmentInfo );
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double currentLabelNumber = 0.0;
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int nSegmentsLeft = mScaleBar->numSegmentsLeft();
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int segmentCounter = 0;
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QString currentNumericLabel;
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QList<QPair<double, double> >::const_iterator segmentIt = segmentInfo.constBegin();
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for ( ; segmentIt != segmentInfo.constEnd(); ++segmentIt )
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{
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if ( segmentCounter == 0 && nSegmentsLeft > 0 )
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{
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//label first left segment
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currentNumericLabel = firstLabel;
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}
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else if ( segmentCounter != 0 && segmentCounter == nSegmentsLeft ) //reset label number to 0 if there are left segments
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{
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currentLabelNumber = 0;
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}
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if ( segmentCounter >= nSegmentsLeft )
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{
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currentNumericLabel = QString::number( currentLabelNumber / mScaleBar->numMapUnitsPerScaleBarUnit() );
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}
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if ( segmentCounter == 0 || segmentCounter >= nSegmentsLeft ) //don't draw label for intermediate left segments
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{
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QgsComposerUtils::drawText( p, QPointF( segmentIt->first - QgsComposerUtils::textWidthMM( mScaleBar->font(), currentNumericLabel ) / 2 + xOffset, QgsComposerUtils::fontAscentMM( mScaleBar->font() ) + mScaleBar->boxContentSpace() ),
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currentNumericLabel, mScaleBar->font(), mScaleBar->fontColor() );
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}
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if ( segmentCounter >= nSegmentsLeft )
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{
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currentLabelNumber += mScaleBar->numUnitsPerSegment();
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}
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++segmentCounter;
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}
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//also draw the last label
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if ( !segmentInfo.isEmpty() )
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{
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currentNumericLabel = QString::number( currentLabelNumber / mScaleBar->numMapUnitsPerScaleBarUnit() );
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QgsComposerUtils::drawText( p, QPointF( segmentInfo.last().first + mScaleBar->segmentMillimeters() - QgsComposerUtils::textWidthMM( mScaleBar->font(), currentNumericLabel ) / 2 + xOffset, QgsComposerUtils::fontAscentMM( mScaleBar->font() ) + mScaleBar->boxContentSpace() ),
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currentNumericLabel + ' ' + mScaleBar->unitLabeling(), mScaleBar->font(), mScaleBar->fontColor() );
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}
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p->restore();
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}
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QRectF QgsScaleBarStyle::calculateBoxSize() const
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{
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if ( !mScaleBar )
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{
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return QRectF();
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}
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//consider centered first label
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double firstLabelLeft = QgsComposerUtils::textWidthMM( mScaleBar->font(), mScaleBar->firstLabelString() ) / 2;
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//consider last number and label
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double largestLabelNumber = mScaleBar->numSegments() * mScaleBar->numUnitsPerSegment() / mScaleBar->numMapUnitsPerScaleBarUnit();
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QString largestNumberLabel = QString::number( largestLabelNumber );
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QString largestLabel = QString::number( largestLabelNumber ) + ' ' + mScaleBar->unitLabeling();
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double largestLabelWidth = QgsComposerUtils::textWidthMM( mScaleBar->font(), largestLabel ) - QgsComposerUtils::textWidthMM( mScaleBar->font(), largestNumberLabel ) / 2;
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double totalBarLength = 0.0;
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QList< QPair<double, double> > segmentList;
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mScaleBar->segmentPositions( segmentList );
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QList< QPair<double, double> >::const_iterator segmentIt = segmentList.constBegin();
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for ( ; segmentIt != segmentList.constEnd(); ++segmentIt )
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{
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totalBarLength += segmentIt->second;
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}
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double width = firstLabelLeft + totalBarLength + 2 * mScaleBar->pen().widthF() + largestLabelWidth + 2 * mScaleBar->boxContentSpace();
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double height = mScaleBar->height() + mScaleBar->labelBarSpace() + 2 * mScaleBar->boxContentSpace() + QgsComposerUtils::fontAscentMM( mScaleBar->font() );
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return QRectF( mScaleBar->pos().x(), mScaleBar->pos().y(), width, height );
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}
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