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https://github.com/qgis/QGIS.git
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Change vertical alignment
Use x-height for vertical offset rather than font-height/2
This commit is contained in:
Matthias Kuhn
parent
954bec45a0
commit
3039f9354b
@ -1,298 +1,297 @@
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/***************************************************************************
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qgsdiagram.cpp
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---------------------
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begin : March 2011
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copyright : (C) 2011 by Marco Hugentobler
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email : marco dot hugentobler at sourcepole dot ch
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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 "qgsdiagram.h"
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#include "qgsdiagramrendererv2.h"
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#include "qgsrendercontext.h"
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#include <QPainter>
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void QgsDiagram::setPenWidth( QPen& pen, const QgsDiagramSettings& s, const QgsRenderContext& c )
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{
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if ( s.sizeType == QgsDiagramSettings::MM )
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{
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pen.setWidthF( s.penWidth * c.scaleFactor() );
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}
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else
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{
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pen.setWidthF( s.penWidth / c.mapToPixel().mapUnitsPerPixel() );
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}
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}
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QSizeF QgsDiagram::sizePainterUnits( const QSizeF& size, const QgsDiagramSettings& s, const QgsRenderContext& c )
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{
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Q_UNUSED( size );
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if ( s.sizeType == QgsDiagramSettings::MM )
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{
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return QSizeF( s.size.width() * c.scaleFactor(), s.size.height() * c.scaleFactor() );
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}
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else
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{
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return QSizeF( s.size.width() / c.mapToPixel().mapUnitsPerPixel(), s.size.height() / c.mapToPixel().mapUnitsPerPixel() );
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}
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}
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QFont QgsDiagram::scaledFont( const QgsDiagramSettings& s, const QgsRenderContext& c )
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{
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QFont f = s.font;
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if ( s.sizeType == QgsDiagramSettings::MM )
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{
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f.setPixelSize( s.font.pointSizeF() * 0.376 * c.scaleFactor() );
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}
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else
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{
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f.setPixelSize( s.font.pointSizeF() / c.mapToPixel().mapUnitsPerPixel() );
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}
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return f;
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}
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QgsTextDiagram::QgsTextDiagram(): mOrientation( Vertical ), mShape( Circle )
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{
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mPen.setWidthF( 2.0 );
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mPen.setColor( QColor( 0, 0, 0 ) );
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mPen.setCapStyle( Qt::FlatCap );
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mBrush.setStyle( Qt::SolidPattern );
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}
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QgsTextDiagram::~QgsTextDiagram()
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{
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}
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void QgsTextDiagram::renderDiagram( const QgsAttributeMap& att, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position )
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{
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QPainter* p = c.painter();
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if ( !p )
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{
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return;
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}
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double scaleDenominator = c.rendererScale();
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if (( s.minScaleDenominator != -1 && scaleDenominator < s.minScaleDenominator )
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|| ( s.maxScaleDenominator != -1 && scaleDenominator > s.maxScaleDenominator ) )
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{
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return;
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}
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//convert from mm / map units to painter units
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QSizeF spu = sizePainterUnits( s.size, s, c );
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double w = spu.width();
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double h = spu.height();
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double baseX = position.x();
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double baseY = position.y() - h;
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QList<QPointF> textPositions; //midpoints for text placement
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int nCategories = s.categoryIndices.size();
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for ( int i = 0; i < nCategories; ++i )
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{
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if ( mOrientation == Horizontal )
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{
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textPositions.push_back( QPointF( baseX + ( w / nCategories ) * i + w / nCategories / 2.0 , baseY + h / 2.0 ) );
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}
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else //vertical
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{
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textPositions.push_back( QPointF( baseX + w / 2.0, baseY + h / nCategories * i + w / nCategories / 2.0 ) );
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}
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}
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mPen.setColor( s.penColor );
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setPenWidth( mPen, s, c );
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p->setPen( mPen );
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mBrush.setColor( s.backgroundColor );
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p->setBrush( mBrush );
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//draw shapes and separator lines first
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if ( mShape == Circle )
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{
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p->drawEllipse( baseX, baseY, w, h );
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//draw separator lines
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QList<QPointF> intersect; //intersections between shape and separation lines
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QPointF center( baseX + w / 2.0, baseY + h / 2.0 );
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double r1 = w / 2.0; double r2 = h / 2.0;
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for ( int i = 1; i < nCategories; ++i )
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{
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if ( mOrientation == Horizontal )
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{
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lineEllipseIntersection( QPointF( baseX + w / nCategories * i, baseY ), QPointF( baseX + w / nCategories * i, baseY + h ), center, r1, r2, intersect );
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}
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else //vertical
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{
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lineEllipseIntersection( QPointF( baseX, baseY + h / nCategories * i ), QPointF( baseX + w, baseY + h / nCategories * i ), center, r1, r2, intersect );
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}
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if ( intersect.size() > 1 )
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{
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p->drawLine( intersect.at( 0 ), intersect.at( 1 ) );
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}
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}
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}
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else if ( mShape == Rectangle )
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{
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p->drawRect( QRectF( baseX, baseY, w, h ) );
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for ( int i = 1; i < nCategories; ++i )
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{
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if ( mOrientation == Horizontal )
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{
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p->drawLine( QPointF( baseX + w / nCategories * i , baseY ), QPointF( baseX + w / nCategories * i, baseY + h ) );
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}
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else
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{
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p->drawLine( QPointF( baseX, baseY + h / nCategories * i ) , QPointF( baseX + w, baseY + h / nCategories * i ) );
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}
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}
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}
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else //triangle
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{
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QPolygonF triangle;
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triangle << QPointF( baseX, baseY + h ) << QPointF( baseX + w, baseY + h ) << QPointF( baseX + w / 2.0, baseY );
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p->drawPolygon( triangle );
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QLineF triangleEdgeLeft( baseX + w / 2.0, baseY, baseX, baseY + h );
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QLineF triangleEdgeRight( baseX + w, baseY + h, baseX + w / 2.0, baseY );
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QPointF intersectionPoint1, intersectionPoint2;
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for ( int i = 1; i < nCategories; ++i )
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{
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if ( mOrientation == Horizontal )
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{
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QLineF verticalLine( baseX + w / nCategories * i, baseY + h, baseX + w / nCategories * i, baseY );
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if ( baseX + w / nCategories * i < baseX + w / 2.0 )
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{
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verticalLine.intersect( triangleEdgeLeft, &intersectionPoint1 );
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}
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else
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{
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verticalLine.intersect( triangleEdgeRight, &intersectionPoint1 );
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}
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p->drawLine( QPointF( baseX + w / nCategories * i, baseY + h ), intersectionPoint1 );
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}
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else //vertical
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{
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QLineF horizontalLine( baseX, baseY + h / nCategories * i, baseX + w, baseY + h / nCategories * i );
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horizontalLine.intersect( triangleEdgeLeft, &intersectionPoint1 );
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horizontalLine.intersect( triangleEdgeRight, &intersectionPoint2 );
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p->drawLine( intersectionPoint1, intersectionPoint2 );
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}
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}
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}
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//draw text
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QFont sFont = scaledFont( s, c );
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QFontMetricsF fontMetrics( sFont );
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p->setFont( sFont );
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for ( int i = 0; i < textPositions.size(); ++i )
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{
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QString val = att[ s.categoryIndices.at( i )].toString();
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//find out dimensions
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double textHeight = fontMetrics.height();
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double textWidth = fontMetrics.width( val );
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mPen.setColor( s.categoryColors.at( i ) );
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p->setPen( mPen );
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QPointF position = textPositions.at( i );
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p->drawText( QPointF( position.x() - textWidth / 2.0, position.y() + textHeight / 2.0 ), val );
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}
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}
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void QgsTextDiagram::lineEllipseIntersection( const QPointF& lineStart, const QPointF& lineEnd, const QPointF& ellipseMid, double r1, double r2, QList<QPointF>& result ) const
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{
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result.clear();
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double rrx = r1 * r1;
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double rry = r2 * r2;
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double x21 = lineEnd.x() - lineStart.x();
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double y21 = lineEnd.y() - lineStart.y();
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double x10 = lineStart.x() - ellipseMid.x();
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double y10 = lineStart.y() - ellipseMid.y();
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double a = x21 * x21 / rrx + y21 * y21 / rry;
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double b = x21 * x10 / rrx + y21 * y10 / rry;
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double c = x10 * x10 / rrx + y10 * y10 / rry;
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double d = b * b - a * ( c - 1 );
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if ( d > 0 )
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{
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double e = sqrt( d );
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double u1 = ( -b - e ) / a;
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double u2 = ( -b + e ) / a;
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//work with a tolerance of 0.00001 because of limited numerical precision
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if ( -0.00001 <= u1 && u1 < 1.00001 )
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{
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result.push_back( QPointF( lineStart.x() + x21 * u1, lineStart.y() + y21 * u1 ) );
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}
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if ( -0.00001 <= u2 && u2 <= 1.00001 )
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{
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result.push_back( QPointF( lineStart.x() + x21 * u2, lineStart.y() + y21 * u2 ) );
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}
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}
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}
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QgsPieDiagram::QgsPieDiagram()
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{
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mCategoryBrush.setStyle( Qt::SolidPattern );
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mPen.setStyle( Qt::SolidLine );
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}
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QgsPieDiagram::~QgsPieDiagram()
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{
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}
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void QgsPieDiagram::renderDiagram( const QgsAttributeMap& att, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position )
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{
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QPainter* p = c.painter();
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if ( !p )
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{
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return;
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}
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//get sum of values
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QList<double> values;
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double currentVal = 0;
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double valSum = 0;
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QList<int>::const_iterator catIt = s.categoryIndices.constBegin();
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for ( ; catIt != s.categoryIndices.constEnd(); ++catIt )
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{
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currentVal = att[*catIt].toDouble();
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values.push_back( currentVal );
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valSum += currentVal;
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}
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//draw the slices
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double totalAngle = 0;
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double currentAngle;
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//convert from mm / map units to painter units
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QSizeF spu = sizePainterUnits( s.size, s, c );
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double w = spu.width();
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double h = spu.height();
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double baseX = position.x();
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double baseY = position.y() - h;
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mPen.setColor( s.penColor );
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setPenWidth( mPen, s, c );
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p->setPen( mPen );
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QList<double>::const_iterator valIt = values.constBegin();
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QList< QColor >::const_iterator colIt = s.categoryColors.constBegin();
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for ( ; valIt != values.constEnd(); ++valIt, ++colIt )
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{
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currentAngle = *valIt / valSum * 360 * 16;
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mCategoryBrush.setColor( *colIt );
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p->setBrush( mCategoryBrush );
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p->drawPie( baseX, baseY, w, h, totalAngle, currentAngle );
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totalAngle += currentAngle;
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}
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}
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/***************************************************************************
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qgsdiagram.cpp
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---------------------
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begin : March 2011
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copyright : (C) 2011 by Marco Hugentobler
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email : marco dot hugentobler at sourcepole dot ch
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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 "qgsdiagram.h"
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#include "qgsdiagramrendererv2.h"
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#include "qgsrendercontext.h"
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#include <QPainter>
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void QgsDiagram::setPenWidth( QPen& pen, const QgsDiagramSettings& s, const QgsRenderContext& c )
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{
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if ( s.sizeType == QgsDiagramSettings::MM )
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{
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pen.setWidthF( s.penWidth * c.scaleFactor() );
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}
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else
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{
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pen.setWidthF( s.penWidth / c.mapToPixel().mapUnitsPerPixel() );
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}
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}
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QSizeF QgsDiagram::sizePainterUnits( const QSizeF& size, const QgsDiagramSettings& s, const QgsRenderContext& c )
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{
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Q_UNUSED( size );
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if ( s.sizeType == QgsDiagramSettings::MM )
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{
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return QSizeF( s.size.width() * c.scaleFactor(), s.size.height() * c.scaleFactor() );
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}
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else
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{
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return QSizeF( s.size.width() / c.mapToPixel().mapUnitsPerPixel(), s.size.height() / c.mapToPixel().mapUnitsPerPixel() );
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}
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}
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QFont QgsDiagram::scaledFont( const QgsDiagramSettings& s, const QgsRenderContext& c )
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{
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QFont f = s.font;
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if ( s.sizeType == QgsDiagramSettings::MM )
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{
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f.setPixelSize( s.font.pointSizeF() * 0.376 * c.scaleFactor() );
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}
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else
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{
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f.setPixelSize( s.font.pointSizeF() / c.mapToPixel().mapUnitsPerPixel() );
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}
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return f;
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}
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QgsTextDiagram::QgsTextDiagram(): mOrientation( Vertical ), mShape( Circle )
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{
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mPen.setWidthF( 2.0 );
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mPen.setColor( QColor( 0, 0, 0 ) );
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mPen.setCapStyle( Qt::FlatCap );
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mBrush.setStyle( Qt::SolidPattern );
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}
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QgsTextDiagram::~QgsTextDiagram()
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{
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}
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void QgsTextDiagram::renderDiagram( const QgsAttributeMap& att, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position )
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{
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QPainter* p = c.painter();
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if ( !p )
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{
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return;
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}
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double scaleDenominator = c.rendererScale();
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if (( s.minScaleDenominator != -1 && scaleDenominator < s.minScaleDenominator )
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|| ( s.maxScaleDenominator != -1 && scaleDenominator > s.maxScaleDenominator ) )
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{
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return;
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}
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//convert from mm / map units to painter units
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QSizeF spu = sizePainterUnits( s.size, s, c );
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double w = spu.width();
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double h = spu.height();
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double baseX = position.x();
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double baseY = position.y() - h;
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QList<QPointF> textPositions; //midpoints for text placement
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int nCategories = s.categoryIndices.size();
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for ( int i = 0; i < nCategories; ++i )
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{
|
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if ( mOrientation == Horizontal )
|
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{
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textPositions.push_back( QPointF( baseX + ( w / nCategories ) * i + w / nCategories / 2.0 , baseY + h / 2.0 ) );
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}
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else //vertical
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{
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textPositions.push_back( QPointF( baseX + w / 2.0, baseY + h / nCategories * i + w / nCategories / 2.0 ) );
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}
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}
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mPen.setColor( s.penColor );
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setPenWidth( mPen, s, c );
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p->setPen( mPen );
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mBrush.setColor( s.backgroundColor );
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p->setBrush( mBrush );
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//draw shapes and separator lines first
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if ( mShape == Circle )
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{
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p->drawEllipse( baseX, baseY, w, h );
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//draw separator lines
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QList<QPointF> intersect; //intersections between shape and separation lines
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QPointF center( baseX + w / 2.0, baseY + h / 2.0 );
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double r1 = w / 2.0; double r2 = h / 2.0;
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for ( int i = 1; i < nCategories; ++i )
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{
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if ( mOrientation == Horizontal )
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{
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lineEllipseIntersection( QPointF( baseX + w / nCategories * i, baseY ), QPointF( baseX + w / nCategories * i, baseY + h ), center, r1, r2, intersect );
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}
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else //vertical
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{
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lineEllipseIntersection( QPointF( baseX, baseY + h / nCategories * i ), QPointF( baseX + w, baseY + h / nCategories * i ), center, r1, r2, intersect );
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}
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if ( intersect.size() > 1 )
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{
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p->drawLine( intersect.at( 0 ), intersect.at( 1 ) );
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}
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}
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}
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else if ( mShape == Rectangle )
|
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{
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p->drawRect( QRectF( baseX, baseY, w, h ) );
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for ( int i = 1; i < nCategories; ++i )
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{
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if ( mOrientation == Horizontal )
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{
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p->drawLine( QPointF( baseX + w / nCategories * i , baseY ), QPointF( baseX + w / nCategories * i, baseY + h ) );
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}
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else
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{
|
||||
p->drawLine( QPointF( baseX, baseY + h / nCategories * i ) , QPointF( baseX + w, baseY + h / nCategories * i ) );
|
||||
}
|
||||
}
|
||||
}
|
||||
else //triangle
|
||||
{
|
||||
QPolygonF triangle;
|
||||
triangle << QPointF( baseX, baseY + h ) << QPointF( baseX + w, baseY + h ) << QPointF( baseX + w / 2.0, baseY );
|
||||
p->drawPolygon( triangle );
|
||||
|
||||
QLineF triangleEdgeLeft( baseX + w / 2.0, baseY, baseX, baseY + h );
|
||||
QLineF triangleEdgeRight( baseX + w, baseY + h, baseX + w / 2.0, baseY );
|
||||
QPointF intersectionPoint1, intersectionPoint2;
|
||||
|
||||
for ( int i = 1; i < nCategories; ++i )
|
||||
{
|
||||
if ( mOrientation == Horizontal )
|
||||
{
|
||||
QLineF verticalLine( baseX + w / nCategories * i, baseY + h, baseX + w / nCategories * i, baseY );
|
||||
if ( baseX + w / nCategories * i < baseX + w / 2.0 )
|
||||
{
|
||||
verticalLine.intersect( triangleEdgeLeft, &intersectionPoint1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
verticalLine.intersect( triangleEdgeRight, &intersectionPoint1 );
|
||||
}
|
||||
p->drawLine( QPointF( baseX + w / nCategories * i, baseY + h ), intersectionPoint1 );
|
||||
}
|
||||
else //vertical
|
||||
{
|
||||
QLineF horizontalLine( baseX, baseY + h / nCategories * i, baseX + w, baseY + h / nCategories * i );
|
||||
horizontalLine.intersect( triangleEdgeLeft, &intersectionPoint1 );
|
||||
horizontalLine.intersect( triangleEdgeRight, &intersectionPoint2 );
|
||||
p->drawLine( intersectionPoint1, intersectionPoint2 );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
//draw text
|
||||
QFont sFont = scaledFont( s, c );
|
||||
QFontMetricsF fontMetrics( sFont );
|
||||
p->setFont( sFont );
|
||||
|
||||
for ( int i = 0; i < textPositions.size(); ++i )
|
||||
{
|
||||
QString val = att[ s.categoryIndices.at( i )].toString();
|
||||
//find out dimensions
|
||||
double textWidth = fontMetrics.width( val );
|
||||
mPen.setColor( s.categoryColors.at( i ) );
|
||||
p->setPen( mPen );
|
||||
QPointF position = textPositions.at( i );
|
||||
p->drawText( QPointF( position.x() - textWidth / 2.0, position.y() + fontMetrics.xHeight() ), val );
|
||||
}
|
||||
}
|
||||
|
||||
void QgsTextDiagram::lineEllipseIntersection( const QPointF& lineStart, const QPointF& lineEnd, const QPointF& ellipseMid, double r1, double r2, QList<QPointF>& result ) const
|
||||
{
|
||||
result.clear();
|
||||
|
||||
double rrx = r1 * r1;
|
||||
double rry = r2 * r2;
|
||||
double x21 = lineEnd.x() - lineStart.x();
|
||||
double y21 = lineEnd.y() - lineStart.y();
|
||||
double x10 = lineStart.x() - ellipseMid.x();
|
||||
double y10 = lineStart.y() - ellipseMid.y();
|
||||
double a = x21 * x21 / rrx + y21 * y21 / rry;
|
||||
double b = x21 * x10 / rrx + y21 * y10 / rry;
|
||||
double c = x10 * x10 / rrx + y10 * y10 / rry;
|
||||
double d = b * b - a * ( c - 1 );
|
||||
if ( d > 0 )
|
||||
{
|
||||
double e = sqrt( d );
|
||||
double u1 = ( -b - e ) / a;
|
||||
double u2 = ( -b + e ) / a;
|
||||
//work with a tolerance of 0.00001 because of limited numerical precision
|
||||
if ( -0.00001 <= u1 && u1 < 1.00001 )
|
||||
{
|
||||
result.push_back( QPointF( lineStart.x() + x21 * u1, lineStart.y() + y21 * u1 ) );
|
||||
}
|
||||
if ( -0.00001 <= u2 && u2 <= 1.00001 )
|
||||
{
|
||||
result.push_back( QPointF( lineStart.x() + x21 * u2, lineStart.y() + y21 * u2 ) );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
QgsPieDiagram::QgsPieDiagram()
|
||||
{
|
||||
mCategoryBrush.setStyle( Qt::SolidPattern );
|
||||
mPen.setStyle( Qt::SolidLine );
|
||||
}
|
||||
|
||||
QgsPieDiagram::~QgsPieDiagram()
|
||||
{
|
||||
}
|
||||
|
||||
void QgsPieDiagram::renderDiagram( const QgsAttributeMap& att, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position )
|
||||
{
|
||||
QPainter* p = c.painter();
|
||||
if ( !p )
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
//get sum of values
|
||||
QList<double> values;
|
||||
double currentVal = 0;
|
||||
double valSum = 0;
|
||||
|
||||
QList<int>::const_iterator catIt = s.categoryIndices.constBegin();
|
||||
for ( ; catIt != s.categoryIndices.constEnd(); ++catIt )
|
||||
{
|
||||
currentVal = att[*catIt].toDouble();
|
||||
values.push_back( currentVal );
|
||||
valSum += currentVal;
|
||||
}
|
||||
|
||||
//draw the slices
|
||||
double totalAngle = 0;
|
||||
double currentAngle;
|
||||
|
||||
//convert from mm / map units to painter units
|
||||
QSizeF spu = sizePainterUnits( s.size, s, c );
|
||||
double w = spu.width();
|
||||
double h = spu.height();
|
||||
|
||||
double baseX = position.x();
|
||||
double baseY = position.y() - h;
|
||||
|
||||
mPen.setColor( s.penColor );
|
||||
setPenWidth( mPen, s, c );
|
||||
p->setPen( mPen );
|
||||
|
||||
QList<double>::const_iterator valIt = values.constBegin();
|
||||
QList< QColor >::const_iterator colIt = s.categoryColors.constBegin();
|
||||
for ( ; valIt != values.constEnd(); ++valIt, ++colIt )
|
||||
{
|
||||
currentAngle = *valIt / valSum * 360 * 16;
|
||||
mCategoryBrush.setColor( *colIt );
|
||||
p->setBrush( mCategoryBrush );
|
||||
p->drawPie( baseX, baseY, w, h, totalAngle, currentAngle );
|
||||
totalAngle += currentAngle;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user