mirror of
https://github.com/qgis/QGIS.git
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573 lines
16 KiB
Plaintext
573 lines
16 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/symbology/qgsrulebasedrenderer.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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class QgsRuleBasedRenderer : QgsFeatureRenderer
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{
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%Docstring
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When drawing a vector layer with rule-based renderer, it goes through
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the rules and draws features with symbols from rules that match.
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%End
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%TypeHeaderCode
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#include "qgsrulebasedrenderer.h"
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%End
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public:
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enum FeatureFlags
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{
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FeatIsSelected,
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FeatDrawMarkers
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};
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struct FeatureToRender
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{
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FeatureToRender( const QgsFeature &_f, int _flags );
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QgsFeature feat;
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int flags; // selected and/or draw markers
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};
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struct RenderJob
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{
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RenderJob( QgsRuleBasedRenderer::FeatureToRender &_ftr, QgsSymbol *_s );
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QgsRuleBasedRenderer::FeatureToRender &ftr;
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%Docstring
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Feature to render
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%End
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QgsSymbol *symbol;
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private:
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RenderJob &operator=( const RenderJob & );
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};
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struct RenderLevel
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{
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explicit RenderLevel( int z );
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~RenderLevel();
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int zIndex;
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QList<QgsRuleBasedRenderer::RenderJob *> jobs;
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RenderLevel( const QgsRuleBasedRenderer::RenderLevel &other );
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};
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typedef QList<QgsRuleBasedRenderer::RenderLevel> RenderQueue;
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typedef QList<QgsRuleBasedRenderer::Rule *> RuleList;
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class Rule
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{
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%Docstring
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This class keeps data about a rules for rule-based renderer.
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A rule consists of a symbol, filter expression and range of scales.
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If filter is empty, it matches all features.
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If scale range has both values zero, it matches all scales.
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If one of the min/max scale denominators is zero, there is no lower/upper bound for scales.
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A rule matches if both filter and scale range match.
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%End
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%TypeHeaderCode
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#include "qgsrulebasedrenderer.h"
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%End
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public:
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enum RenderResult
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{
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Filtered,
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Inactive,
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Rendered
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};
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Rule( QgsSymbol *symbol /Transfer/, int maximumScale = 0, int minimumScale = 0, const QString &filterExp = QString(),
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const QString &label = QString(), const QString &description = QString(), bool elseRule = false );
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%Docstring
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Constructor takes ownership of the symbol
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%End
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~Rule();
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QString dump( int indent = 0 ) const;
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%Docstring
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Dump for debug purpose
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:param indent: How many characters to indent. Will increase by two with every of the recursive calls
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:return: A string representing this rule
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%End
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QSet<QString> usedAttributes( const QgsRenderContext &context ) const;
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%Docstring
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Returns the attributes used to evaluate the expression of this rule
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:return: A set of attribute names
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%End
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bool needsGeometry() const;
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%Docstring
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Returns ``True`` if this rule or one of its children needs the geometry to be applied.
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%End
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QgsSymbolList symbols( const QgsRenderContext &context = QgsRenderContext() ) const;
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%Docstring
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.. note::
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available in Python bindings as symbol2
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%End
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QgsLegendSymbolList legendSymbolItems( int currentLevel = -1 ) const;
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%Docstring
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.. versionadded:: 2.6
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%End
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bool isFilterOK( const QgsFeature &f, QgsRenderContext *context = 0 ) const;
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%Docstring
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Check if a given feature shall be rendered by this rule
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:param f: The feature to test
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:param context: The context in which the rendering happens
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:return: ``True`` if the feature shall be rendered
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%End
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bool isScaleOK( double scale ) const;
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%Docstring
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Check if this rule applies for a given ``scale``.
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The ``scale`` value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map.
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If set to 0, it will always return ``True``.
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:return: If the rule will be evaluated at this scale
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%End
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QgsSymbol *symbol();
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QString label() const;
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bool dependsOnScale() const;
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double maximumScale() const;
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%Docstring
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Returns the maximum map scale (i.e. most "zoomed in" scale) at which the rule will be active.
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The scale value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map.
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A scale of 0 indicates no maximum scale visibility.
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.. seealso:: :py:func:`minimumScale`
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.. seealso:: :py:func:`setMaximumScale`
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.. versionadded:: 3.0
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%End
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double minimumScale() const;
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%Docstring
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Returns the minimum map scale (i.e. most "zoomed out" scale) at which the rule will be active.
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The scale value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map.
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A scale of 0 indicates no minimum scale visibility.
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.. seealso:: :py:func:`maximumScale`
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.. seealso:: :py:func:`setMinimumScale`
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.. versionadded:: 3.0
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%End
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QgsExpression *filter() const;
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%Docstring
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A filter that will check if this rule applies
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:return: An expression
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%End
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QString filterExpression() const;
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%Docstring
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A filter that will check if this rule applies
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:return: An expression
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%End
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QString description() const;
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%Docstring
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A human readable description for this rule
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:return: Description
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%End
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bool active() const;
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%Docstring
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Returns if this rule is active
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:return: ``True`` if the rule is active
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%End
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QString ruleKey() const;
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%Docstring
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Unique rule identifier (for identification of rule within renderer)
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.. versionadded:: 2.6
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%End
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void setRuleKey( const QString &key );
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%Docstring
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Override the assigned rule key (should be used just internally by rule-based renderer)
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.. versionadded:: 2.6
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%End
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void setSymbol( QgsSymbol *sym /Transfer/ );
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%Docstring
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Sets a new symbol (or ``None``). Deletes old symbol.
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%End
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void setLabel( const QString &label );
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void setMinimumScale( double scale );
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%Docstring
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Sets the minimum map ``scale`` (i.e. most "zoomed out" scale) at which the rule will be active.
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The ``scale`` value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map.
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A ``scale`` of 0 indicates no minimum scale visibility.
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.. seealso:: :py:func:`minimumScale`
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.. seealso:: :py:func:`setMaximumScale`
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%End
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void setMaximumScale( double scale );
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%Docstring
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Sets the maximum map ``scale`` (i.e. most "zoomed in" scale) at which the rule will be active.
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The ``scale`` value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map.
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A ``scale`` of 0 indicates no maximum scale visibility.
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.. seealso:: :py:func:`maximumScale`
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.. seealso:: :py:func:`setMinimumScale`
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%End
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void setFilterExpression( const QString &filterExp );
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%Docstring
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Set the expression used to check if a given feature shall be rendered with this rule
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:param filterExp: An expression
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%End
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void setDescription( const QString &description );
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%Docstring
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Set a human readable description for this rule
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:param description: Description
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%End
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void setActive( bool state );
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%Docstring
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Sets if this rule is active
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:param state: Determines if the rule should be activated or deactivated
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%End
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QgsRuleBasedRenderer::Rule *clone() const /Factory/;
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%Docstring
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clone this rule, return new instance
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%End
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void toSld( QDomDocument &doc, QDomElement &element, QgsStringMap props ) const;
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static QgsRuleBasedRenderer::Rule *createFromSld( QDomElement &element, QgsWkbTypes::GeometryType geomType ) /Factory/;
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%Docstring
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Create a rule from the SLD provided in element and for the specified geometry type.
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%End
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QDomElement save( QDomDocument &doc, QgsSymbolMap &symbolMap ) const;
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bool startRender( QgsRenderContext &context, const QgsFields &fields, QString &filter );
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%Docstring
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prepare the rule for rendering and its children (build active children array)
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%End
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QSet<int> collectZLevels();
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%Docstring
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Gets all used z-levels from this rule and children
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%End
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QgsRuleBasedRenderer::Rule::RenderResult renderFeature( QgsRuleBasedRenderer::FeatureToRender &featToRender, QgsRenderContext &context, QgsRuleBasedRenderer::RenderQueue &renderQueue );
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%Docstring
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Render a given feature, will recursively call subclasses and only render if the constraints apply.
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:param featToRender: The feature to render
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:param context: The rendering context
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:param renderQueue: The rendering queue to which the feature should be added
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:return: The result of the rendering. In explicit if the feature is added to the queue or
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the reason for not rendering the feature.
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%End
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bool willRenderFeature( const QgsFeature &feature, QgsRenderContext *context = 0 );
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%Docstring
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only tell whether a feature will be rendered without actually rendering it
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%End
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QgsSymbolList symbolsForFeature( const QgsFeature &feature, QgsRenderContext *context = 0 );
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%Docstring
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tell which symbols will be used to render the feature
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%End
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QSet< QString > legendKeysForFeature( const QgsFeature &feature, QgsRenderContext *context = 0 );
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%Docstring
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Returns which legend keys match the feature
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.. versionadded:: 2.14
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%End
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QgsRuleBasedRenderer::RuleList rulesForFeature( const QgsFeature &feature, QgsRenderContext *context = 0, bool onlyActive = true );
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%Docstring
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Returns the list of rules used to render the feature in a specific
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context.
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:param feature: The feature for which rules have to be find
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:param context: The rendering context
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:param onlyActive: ``True`` to search for active rules only, ``False`` otherwise
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%End
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void stopRender( QgsRenderContext &context );
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%Docstring
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Stop a rendering process. Used to clean up the internal state of this rule
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:param context: The rendering context
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%End
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static QgsRuleBasedRenderer::Rule *create( QDomElement &ruleElem, QgsSymbolMap &symbolMap ) /Factory/;
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%Docstring
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Create a rule from an XML definition
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:param ruleElem: The XML rule element
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:param symbolMap: Symbol map
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:return: A new rule
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%End
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const QgsRuleBasedRenderer::RuleList &children();
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%Docstring
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Returns all children rules of this rule
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:return: A list of rules
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%End
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QgsRuleBasedRenderer::RuleList descendants() const;
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%Docstring
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Returns all children, grand-children, grand-grand-children, grand-gra... you get it
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:return: A list of descendant rules
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%End
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QgsRuleBasedRenderer::Rule *parent();
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%Docstring
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The parent rule
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:return: Parent rule
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%End
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void appendChild( QgsRuleBasedRenderer::Rule *rule /Transfer/ );
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%Docstring
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add child rule, take ownership, sets this as parent
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%End
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void insertChild( int i, QgsRuleBasedRenderer::Rule *rule /Transfer/ );
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%Docstring
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add child rule, take ownership, sets this as parent
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%End
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void removeChild( QgsRuleBasedRenderer::Rule *rule );
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%Docstring
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delete child rule
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%End
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void removeChildAt( int i );
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%Docstring
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delete child rule
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%End
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QgsRuleBasedRenderer::Rule *takeChild( QgsRuleBasedRenderer::Rule *rule ) /TransferBack/;
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%Docstring
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take child rule out, set parent as ``None``
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%End
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QgsRuleBasedRenderer::Rule *takeChildAt( int i ) /TransferBack/;
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%Docstring
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take child rule out, set parent as ``None``
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%End
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QgsRuleBasedRenderer::Rule *findRuleByKey( const QString &key );
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%Docstring
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Try to find a rule given its unique key
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.. versionadded:: 2.6
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%End
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void setIsElse( bool iselse );
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%Docstring
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Sets if this rule is an ELSE rule
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:param iselse: If ``True``, this rule is an ELSE rule
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%End
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bool isElse() const;
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%Docstring
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Check if this rule is an ELSE rule
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:return: ``True`` if this rule is an else rule
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%End
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bool accept( QgsStyleEntityVisitorInterface *visitor ) const;
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%Docstring
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Accepts the specified symbology ``visitor``, causing it to visit all child rules associated
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with the rule.
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Returns ``True`` if the visitor should continue visiting other objects, or ``False`` if visiting
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should be canceled.
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.. versionadded:: 3.10
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%End
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protected:
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void initFilter();
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private:
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Rule( const QgsRuleBasedRenderer::Rule &rh );
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};
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static QgsFeatureRenderer *create( QDomElement &element, const QgsReadWriteContext &context ) /Factory/;
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%Docstring
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Creates a new rule-based renderer instance from XML
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%End
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QgsRuleBasedRenderer( QgsRuleBasedRenderer::Rule *root /Transfer/ );
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%Docstring
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Constructs the renderer from given tree of rules (takes ownership)
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%End
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QgsRuleBasedRenderer( QgsSymbol *defaultSymbol /Transfer/ );
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%Docstring
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Constructor for convenience. Creates a root rule and adds a default rule with symbol (takes ownership)
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%End
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~QgsRuleBasedRenderer();
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virtual QgsSymbol *symbolForFeature( const QgsFeature &feature, QgsRenderContext &context ) const;
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%Docstring
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Returns symbol for current feature. Should not be used individually: there could be more symbols for a feature
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%End
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virtual bool renderFeature( const QgsFeature &feature, QgsRenderContext &context, int layer = -1, bool selected = false, bool drawVertexMarker = false ) throw( QgsCsException );
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virtual void startRender( QgsRenderContext &context, const QgsFields &fields );
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virtual void stopRender( QgsRenderContext &context );
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virtual QString filter( const QgsFields &fields = QgsFields() );
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virtual QSet<QString> usedAttributes( const QgsRenderContext &context ) const;
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virtual bool filterNeedsGeometry() const;
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virtual QgsRuleBasedRenderer *clone() const /Factory/;
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virtual void toSld( QDomDocument &doc, QDomElement &element, const QgsStringMap &props = QgsStringMap() ) const;
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static QgsFeatureRenderer *createFromSld( QDomElement &element, QgsWkbTypes::GeometryType geomType ) /Factory/;
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virtual QgsSymbolList symbols( QgsRenderContext &context ) const;
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virtual QDomElement save( QDomDocument &doc, const QgsReadWriteContext &context );
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virtual bool legendSymbolItemsCheckable() const;
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virtual bool legendSymbolItemChecked( const QString &key );
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virtual void checkLegendSymbolItem( const QString &key, bool state = true );
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virtual void setLegendSymbolItem( const QString &key, QgsSymbol *symbol /Transfer/ );
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virtual QgsLegendSymbolList legendSymbolItems() const;
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virtual QString dump() const;
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virtual bool willRenderFeature( const QgsFeature &feature, QgsRenderContext &context ) const;
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virtual QgsSymbolList symbolsForFeature( const QgsFeature &feature, QgsRenderContext &context ) const;
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virtual QgsSymbolList originalSymbolsForFeature( const QgsFeature &feature, QgsRenderContext &context ) const;
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virtual QSet<QString> legendKeysForFeature( const QgsFeature &feature, QgsRenderContext &context ) const;
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virtual QgsFeatureRenderer::Capabilities capabilities();
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virtual bool accept( QgsStyleEntityVisitorInterface *visitor ) const;
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QgsRuleBasedRenderer::Rule *rootRule();
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static void refineRuleCategories( QgsRuleBasedRenderer::Rule *initialRule, QgsCategorizedSymbolRenderer *r );
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%Docstring
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take a rule and create a list of new rules based on the categories from categorized symbol renderer
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%End
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static void refineRuleRanges( QgsRuleBasedRenderer::Rule *initialRule, QgsGraduatedSymbolRenderer *r );
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%Docstring
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take a rule and create a list of new rules based on the ranges from graduated symbol renderer
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%End
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static void refineRuleScales( QgsRuleBasedRenderer::Rule *initialRule, QList<int> scales );
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%Docstring
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take a rule and create a list of new rules with intervals of scales given by the passed scale denominators
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%End
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static QgsRuleBasedRenderer *convertFromRenderer( const QgsFeatureRenderer *renderer ) /Factory/;
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%Docstring
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creates a QgsRuleBasedRenderer from an existing renderer.
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:return: a new renderer if the conversion was possible, otherwise ``None``.
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.. versionadded:: 2.5
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%End
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static void convertToDataDefinedSymbology( QgsSymbol *symbol, const QString &sizeScaleField, const QString &rotationField = QString() );
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%Docstring
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helper function to convert the size scale and rotation fields present in some other renderers to data defined symbology
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%End
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protected:
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private:
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QgsRuleBasedRenderer( const QgsRuleBasedRenderer & );
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QgsRuleBasedRenderer &operator=( const QgsRuleBasedRenderer & );
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};
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/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/symbology/qgsrulebasedrenderer.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
|