QGIS API Documentation
3.8.0-Zanzibar (11aff65)
src
core
dxf
qgsdxfpallabeling.h
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/***************************************************************************
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qgsdxfpallabeling.h
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-------------------
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begin : January 2014
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copyright : (C) 2014 by Marco Hugentobler
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email : marco at sourcepole dot ch
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***************************************************************************/
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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 QGSDXFPALLABELING_H
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#define QGSDXFPALLABELING_H
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#define SIP_NO_FILE
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#include "
qgsvectorlayerlabelprovider.h
"
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#include "
qgsrulebasedlabeling.h
"
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class
QgsDxfExport
;
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class
QgsPalLayerSettings
;
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class
QgsRuleBasedLabeling
;
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class
QgsDxfLabelProvider
:
public
QgsVectorLayerLabelProvider
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{
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public
:
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explicit
QgsDxfLabelProvider
(
QgsVectorLayer
*
layer
,
const
QString &
providerId
,
QgsDxfExport
*dxf,
const
QgsPalLayerSettings
*settings );
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void
drawLabel
(
QgsRenderContext
&context,
pal::LabelPosition
*label )
const override
;
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void
registerDxfFeature
(
const
QgsFeature
&feature,
QgsRenderContext
&context,
const
QString &dxfLayerName );
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protected
:
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QgsDxfExport
*
mDxfExport
=
nullptr
;
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};
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class
QgsDxfRuleBasedLabelProvider
:
public
QgsRuleBasedLabelProvider
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{
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public
:
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explicit
QgsDxfRuleBasedLabelProvider
(
const
QgsRuleBasedLabeling
&rules,
QgsVectorLayer
*
layer
,
QgsDxfExport
*dxf );
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void
reinit(
QgsVectorLayer
*layer );
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void
drawLabel
(
QgsRenderContext
&context,
pal::LabelPosition
*label )
const override
;
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void
registerDxfFeature
(
QgsFeature
&feature,
QgsRenderContext
&context,
const
QString &dxfLayerName );
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QgsVectorLayerLabelProvider
*createProvider(
QgsVectorLayer
*layer,
const
QString &
providerId
,
bool
withFeatureLoop,
const
QgsPalLayerSettings
*settings )
override
;
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protected
:
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QgsDxfExport
*
mDxfExport
=
nullptr
;
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};
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#endif // QGSDXFPALLABELING_H
QgsDxfRuleBasedLabelProvider
Implements a derived label provider for rule based labels internally used for DXF export...
Definition:
qgsdxfpallabeling.h:72
QgsPalLayerSettings
Definition:
qgspallabeling.h:192
QgsVectorLayerLabelProvider
The QgsVectorLayerLabelProvider class implements a label provider for vector layers.
Definition:
qgsvectorlayerlabelprovider.h:39
QgsFeature
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition:
qgsfeature.h:55
QgsDxfLabelProvider::drawLabel
void drawLabel(QgsRenderContext &context, pal::LabelPosition *label) const override
Re-implementation that writes to DXF file instead of drawing with QPainter.
Definition:
qgsdxfpallabeling.cpp:31
QgsDxfLabelProvider::QgsDxfLabelProvider
QgsDxfLabelProvider(QgsVectorLayer *layer, const QString &providerId, QgsDxfExport *dxf, const QgsPalLayerSettings *settings)
construct the provider
Definition:
qgsdxfpallabeling.cpp:25
QgsAbstractLabelProvider::layer
QgsMapLayer * layer() const
Returns the associated layer, or nullptr if no layer is associated with the provider.
Definition:
qgslabelingengine.h:81
QgsRuleBasedLabelProvider
Definition:
qgsrulebasedlabeling.h:389
QgsDxfLabelProvider::registerDxfFeature
void registerDxfFeature(const QgsFeature &feature, QgsRenderContext &context, const QString &dxfLayerName)
Registration method that keeps track of DXF layer names of individual features.
Definition:
qgsdxfpallabeling.cpp:37
qgsrulebasedlabeling.h
QgsRenderContext
Contains information about the context of a rendering operation.
Definition:
qgsrendercontext.h:50
QgsDxfLabelProvider::mDxfExport
QgsDxfExport * mDxfExport
pointer to parent DXF export where this instance is used
Definition:
qgsdxfpallabeling.h:61
QgsRuleBasedLabeling
Definition:
qgsrulebasedlabeling.h:40
pal::LabelPosition
LabelPosition is a candidate feature label position.
Definition:
labelposition.h:55
QgsAbstractLabelProvider::providerId
QString providerId() const
Returns provider ID - useful in case there is more than one label provider within a layer (e...
Definition:
qgslabelingengine.h:88
qgsvectorlayerlabelprovider.h
QgsDxfLabelProvider
Implements a derived label provider internally used for DXF export.
Definition:
qgsdxfpallabeling.h:38
QgsVectorLayer
Represents a vector layer which manages a vector based data sets.
Definition:
qgsvectorlayer.h:362
QgsDxfExport
Definition:
qgsdxfexport.h:55
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