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diagram
qgsdiagram.h
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/***************************************************************************
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qgsdiagram.h
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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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#ifndef QGSDIAGRAM_H
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#define QGSDIAGRAM_H
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#include "
qgsfeature.h
"
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#include "
qgsexpressioncontext.h
"
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#include <QPen>
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#include <QBrush>
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class
QPainter
;
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class
QPointF
;
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class
QgsDiagramSettings
;
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class
QgsDiagramInterpolationSettings
;
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class
QgsRenderContext
;
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class
QgsExpression
;
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class
CORE_EXPORT
QgsDiagram
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{
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public
:
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virtual
~QgsDiagram
() { clearCache(); }
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virtual
QgsDiagram
* clone()
const
= 0;
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void
clearCache();
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Q_DECL_DEPRECATED
QgsExpression
* getExpression(
const
QString
& expression,
const
QgsFields
* fields );
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QgsExpression
* getExpression(
const
QString
& expression,
const
QgsExpressionContext
& context );
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virtual
Q_DECL_DEPRECATED
void
renderDiagram(
const
QgsAttributes
& att,
QgsRenderContext
& c,
const
QgsDiagramSettings
& s,
const
QPointF
& position );
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virtual
void
renderDiagram(
const
QgsFeature
& feature,
QgsRenderContext
& c,
const
QgsDiagramSettings
& s,
const
QPointF
& position ) = 0;
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virtual
QString
diagramName()
const
= 0;
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virtual
QSizeF
diagramSize(
const
QgsAttributes
& attributes,
const
QgsRenderContext
& c,
const
QgsDiagramSettings
& s ) = 0;
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virtual
Q_DECL_DEPRECATED
QSizeF
diagramSize(
const
QgsAttributes
& attributes,
const
QgsRenderContext
& c,
const
QgsDiagramSettings
& s,
const
QgsDiagramInterpolationSettings
& is );
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virtual
QSizeF
diagramSize(
const
QgsFeature
& feature,
const
QgsRenderContext
& c,
const
QgsDiagramSettings
& s,
const
QgsDiagramInterpolationSettings
& is ) = 0;
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protected
:
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QgsDiagram
();
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QgsDiagram
(
const
QgsDiagram
& other );
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void
setPenWidth(
QPen
& pen,
const
QgsDiagramSettings
& s,
const
QgsRenderContext
& c );
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QSizeF
sizePainterUnits(
const
QSizeF
& size,
const
QgsDiagramSettings
& s,
const
QgsRenderContext
& c );
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float
sizePainterUnits(
float
l,
const
QgsDiagramSettings
& s,
const
QgsRenderContext
& c );
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QFont
scaledFont(
const
QgsDiagramSettings
& s,
const
QgsRenderContext
& c );
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private
:
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QMap<QString, QgsExpression*>
mExpressions;
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};
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#endif // QGSDIAGRAM_H
QgsExpression
Class for parsing and evaluation of expressions (formerly called "search strings").
Definition:
qgsexpression.h:92
qgsfeature.h
QgsDiagram::~QgsDiagram
virtual ~QgsDiagram()
Definition:
qgsdiagram.h:38
QFont
QMap< QString, QgsExpression * >
QgsFields
Container of fields for a vector layer.
Definition:
qgsfield.h:177
qgsexpressioncontext.h
QgsFeature
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition:
qgsfeature.h:176
QPointF
QgsExpressionContext
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
Definition:
qgsexpressioncontext.h:239
QPainter
QString
QgsDiagram
Base class for all diagram types.
Definition:
qgsdiagram.h:35
QgsDiagramInterpolationSettings
Definition:
qgsdiagramrendererv2.h:165
QgsRenderContext
Contains information about the context of a rendering operation.
Definition:
qgsrendercontext.h:42
QSizeF
QPen
QgsAttributes
A vector of attributes.
Definition:
qgsfeature.h:109
QgsDiagramSettings
Definition:
qgsdiagramrendererv2.h:88
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