qgslayoututils.h

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/***************************************************************************
                             qgslayoututils.h
                             -------------------
    begin                : July 2017
    copyright            : (C) 2017 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSLAYOUTUTILS_H
#define QGSLAYOUTUTILS_H
 
#include "qgis_core.h"
#include "qgslayoutitempage.h"
#include <QFont>
#include <QColor>
 
class QgsRenderContext;
class QgsLayout;
class QgsLayoutItemMap;
class QPainter;
class QRectF;
class QStyleOptionGraphicsItem;
 
class CORE_EXPORT QgsLayoutUtils
{
  public:
 
    static void rotate( double angle, double &x, double &y );
 
    static double normalizedAngle( double angle, bool allowNegative = false );
 
    static double snappedAngle( double angle );
 
    static QgsRenderContext createRenderContextForMap( QgsLayoutItemMap *map, QPainter *painter, double dpi = -1 );
 
    static QgsRenderContext createRenderContextForLayout( QgsLayout *layout, QPainter *painter, double dpi = -1 );
 
    static void relativeResizeRect( QRectF &rectToResize, const QRectF &boundsBefore, const QRectF &boundsAfter );
 
    static double relativePosition( double position, double beforeMin, double beforeMax, double afterMin, double afterMax );
 
    static QFont scaledFontPixelSize( const QFont &font );
 
    static double fontAscentMM( const QFont &font );
 
    static double fontDescentMM( const QFont &font );
 
    static double fontHeightMM( const QFont &font );
 
    static double fontHeightCharacterMM( const QFont &font, QChar character );
 
    static double textWidthMM( const QFont &font, const QString &text );
 
    static double textHeightMM( const QFont &font, const QString &text, double multiLineHeight = 1.0 );
 
    static void drawText( QPainter *painter, QPointF position, const QString &text, const QFont &font, const QColor &color = QColor() );
 
    static void drawText( QPainter *painter, const QRectF &rectangle, const QString &text, const QFont &font, const QColor &color = QColor(), Qt::AlignmentFlag halignment = Qt::AlignLeft, Qt::AlignmentFlag valignment = Qt::AlignTop, int flags = Qt::TextWordWrap );
 
    static QRectF largestRotatedRectWithinBounds( const QRectF &originalRect, const QRectF &boundsRect, double rotation );
 
    static QgsLayoutItemPage::Orientation decodePaperOrientation( const QString &string, bool &ok );
 
    static double scaleFactorFromItemStyle( const QStyleOptionGraphicsItem *style );
 
    static QgsMapLayer *mapLayerFromString( const QString &string, QgsProject *project );
 
    static double calculatePrettySize( double minimumSize, double maximumSize );
 
    static bool itemIsAClippingSource( const QgsLayoutItem *item );
 
    static QVector< double > predefinedScales( const QgsLayout *layout );
 
  private:
 
    static constexpr double FONT_WORKAROUND_SCALE = 10;
 
    static double pointsToMM( double pointSize );
 
    static double mmToPoints( double mmSize );
 
    friend class TestQgsLayoutUtils;
};
 
#endif //QGSLAYOUTUTILS_H