/usr/include/qgis/qgsdiagram.h is in libqgis-dev 2.14.11+dfsg-3+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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qgsdiagram.h
---------------------
begin : March 2011
copyright : (C) 2011 by Marco Hugentobler
email : marco dot hugentobler at sourcepole dot ch
***************************************************************************
* *
* 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 QGSDIAGRAM_H
#define QGSDIAGRAM_H
#include "qgsfeature.h"
#include "qgsexpressioncontext.h"
#include <QPen>
#include <QBrush>
class QPainter;
class QPointF;
class QgsDiagramSettings;
class QgsDiagramInterpolationSettings;
class QgsRenderContext;
class QgsExpression;
/** Base class for all diagram types*/
class CORE_EXPORT QgsDiagram
{
public:
virtual ~QgsDiagram() { clearCache(); }
/** Returns an instance that is equivalent to this one
* @note added in 2.4 */
virtual QgsDiagram* clone() const = 0;
void clearCache();
//! @deprecated use QgsExpressionContext variant instead
Q_DECL_DEPRECATED QgsExpression* getExpression( const QString& expression, const QgsFields* fields );
/** Returns a prepared expression for the specified context.
* @param expression expression string
* @param context expression context
* @note added in QGIS 2.12
*/
QgsExpression* getExpression( const QString& expression, const QgsExpressionContext& context );
/** @deprecated `void renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position )` should be used instead */
virtual Q_DECL_DEPRECATED void renderDiagram( const QgsAttributes& att, QgsRenderContext& c, const QgsDiagramSettings& s, QPointF position );
/** Draws the diagram at the given position (in pixel coordinates)*/
virtual void renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, QPointF position ) = 0;
virtual QString diagramName() const = 0;
/** Returns the size in map units the diagram will use to render.*/
virtual QSizeF diagramSize( const QgsAttributes& attributes, const QgsRenderContext& c, const QgsDiagramSettings& s ) = 0;
/** @deprecated `QSizeF diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is )` should be used instead */
virtual Q_DECL_DEPRECATED QSizeF diagramSize( const QgsAttributes& attributes, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is );
/** Returns the size in map units the diagram will use to render. Interpolate size*/
virtual QSizeF diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is ) = 0;
protected:
QgsDiagram();
QgsDiagram( const QgsDiagram& other );
/** Changes the pen width to match the current settings and rendering context
* @param pen The pen to modify
* @param s The settings that specify the pen width
* @param c The rendering specifying the proper scale units for pixel conversion
*/
void setPenWidth( QPen& pen, const QgsDiagramSettings& s, const QgsRenderContext& c );
/** Calculates a size to match the current settings and rendering context
* @param size The size to convert
* @param s The settings that specify the size type
* @param c The rendering specifying the proper scale units for pixel conversion
*
* @return The converted size for rendering
*/
QSizeF sizePainterUnits( QSizeF size, const QgsDiagramSettings& s, const QgsRenderContext& c );
/** Calculates a length to match the current settings and rendering context
* @param l The length to convert
* @param s Unused
* @param c The rendering specifying the proper scale units for pixel conversion
*
* @return The converted length for rendering
*/
float sizePainterUnits( float l, const QgsDiagramSettings& s, const QgsRenderContext& c );
/** Calculates a size to match the current settings and rendering context
* @param s The settings that contain the font size and size type
* @param c The rendering specifying the proper scale units for pixel conversion
*
* @return The properly scaled font for rendering
*/
QFont scaledFont( const QgsDiagramSettings& s, const QgsRenderContext& c );
private:
QMap<QString, QgsExpression*> mExpressions;
};
#endif // QGSDIAGRAM_H
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