29 QString
type = element.attribute( QStringLiteral(
"type" ) );
30 if (
type == QLatin1String(
"rule-based" ) )
34 else if (
type == QLatin1String(
"simple" ) )
62 return QStringLiteral(
"simple" );
72 QDomElement elem = doc.createElement( QStringLiteral(
"labeling" ) );
73 elem.setAttribute( QStringLiteral(
"type" ), QStringLiteral(
"simple" ) );
74 elem.appendChild( mSettings->writeXml( doc, context ) );
80 Q_UNUSED( providerId )
89 if ( !visitor->
visit( &entity ) )
97 return mSettings->format().containsAdvancedEffects();
102 QDomElement settingsElem = element.firstChildElement( QStringLiteral(
"settings" ) );
103 if ( !settingsElem.isNull() )
115 double quadOffsetX = 0.5, quadOffsetY = 0.5;
118 switch ( quadrantPosition )
156 return QPointF( quadOffsetX, quadOffsetY );
162 void appendSimpleFunction( QDomDocument &doc, QDomElement &parent,
const QString &name,
const QString &attribute )
164 QDomElement
function = doc.createElement( QStringLiteral(
"ogc:Function" ) );
165 function.setAttribute( QStringLiteral(
"name" ), name );
166 parent.appendChild(
function );
167 QDomElement
property = doc.createElement( QStringLiteral(
"ogc:PropertyName" ) );
168 property.appendChild( doc.createTextNode( attribute ) );
169 function.appendChild( property );
174 std::unique_ptr<QgsMarkerSymbolLayer> layer;
175 switch ( settings.
type() )
203 switch ( settings.
type() )
221 layer.reset( marker );
224 layer->setEnabled(
true );
226 QSizeF size = settings.
size();
227 layer->setSize( std::max( 1., std::max( size.width(), size.height() ) ) );
228 layer->setSizeUnit( settings.
sizeUnit() );
234 int alpha = std::round( settings.
opacity() * 255 );
235 fillColor.setAlpha( alpha );
236 strokeColor.setAlpha( alpha );
238 layer->setFillColor( fillColor );
239 layer->setStrokeColor( strokeColor );
243 layer->setAngle( settings.
rotation() );
246 layer->setOffset( settings.
offset() );
247 layer->setOffsetUnit( settings.
offsetUnit() );
254 QDomDocument doc = parent.ownerDocument();
257 QDomElement textSymbolizerElement = doc.createElement( QStringLiteral(
"se:TextSymbolizer" ) );
258 parent.appendChild( textSymbolizerElement );
262 QFont font = format.
font();
263 QDomElement labelElement = doc.createElement( QStringLiteral(
"se:Label" ) );
264 textSymbolizerElement.appendChild( labelElement );
267 labelElement.appendChild( doc.createComment( QStringLiteral(
"SE Export for %1 not implemented yet" ).arg(
settings.
getLabelExpression()->
dump() ) ) );
268 labelElement.appendChild( doc.createTextNode(
"Placeholder" ) );
289 QDomElement propertyNameElement = doc.createElement( QStringLiteral(
"ogc:PropertyName" ) );
291 labelElement.appendChild( propertyNameElement );
296 QDomElement fontElement = doc.createElement( QStringLiteral(
"se:Font" ) );
297 textSymbolizerElement.appendChild( fontElement );
301 if ( format.
font().italic() )
305 if ( format.
font().bold() )
311 QDomElement labelPlacement = doc.createElement( QStringLiteral(
"se:LabelPlacement" ) );
312 textSymbolizerElement.appendChild( labelPlacement );
313 double maxDisplacement = 0;
314 double repeatDistance = 0;
319 QDomElement pointPlacement = doc.createElement(
"se:PointPlacement" );
320 labelPlacement.appendChild( pointPlacement );
335 QDomElement rotation = doc.createElement(
"se:Rotation" );
336 pointPlacement.appendChild( rotation );
344 QDomElement pointPlacement = doc.createElement(
"se:PointPlacement" );
345 labelPlacement.appendChild( pointPlacement );
352 double offset = std::sqrt( radius * radius / 2 );
353 maxDisplacement = radius + 1;
362 QDomElement pointPlacement = doc.createElement(
"se:PointPlacement" );
363 labelPlacement.appendChild( pointPlacement );
374 QDomElement linePlacement = doc.createElement(
"se:LinePlacement" );
375 labelPlacement.appendChild( linePlacement );
382 QDomElement perpendicular = doc.createElement(
"se:PerpendicularOffset" );
383 linePlacement.appendChild( perpendicular );
390 QDomElement repeat = doc.createElement(
"se:Repeat" );
391 linePlacement.appendChild( repeat );
392 repeat.appendChild( doc.createTextNode( QStringLiteral(
"true" ) ) );
393 QDomElement gap = doc.createElement(
"se:Gap" );
394 linePlacement.appendChild( gap );
400 QDomElement generalize = doc.createElement(
"se:GeneralizeLine" );
401 linePlacement.appendChild( generalize );
402 generalize.appendChild( doc.createTextNode( QStringLiteral(
"true" ) ) );
411 QDomElement haloElement = doc.createElement( QStringLiteral(
"se:Halo" ) );
412 textSymbolizerElement.appendChild( haloElement );
414 QDomElement radiusElement = doc.createElement( QStringLiteral(
"se:Radius" ) );
415 haloElement.appendChild( radiusElement );
420 QDomElement fillElement = doc.createElement( QStringLiteral(
"se:Fill" ) );
421 haloElement.appendChild( fillElement );
430 QDomElement fillElement = doc.createElement( QStringLiteral(
"se:Fill" ) );
431 textSymbolizerElement.appendChild( fillElement );
443 layer->writeSldMarker( doc, textSymbolizerElement, props );
450 QDomElement priorityElement = doc.createElement( QStringLiteral(
"se:Priority" ) );
451 textSymbolizerElement.appendChild( priorityElement );
458 priorityElement.appendChild( doc.createTextNode( QString::number( priority ) ) );
462 if ( font.underline() )
465 textSymbolizerElement.appendChild( vo );
467 if ( font.strikeOut() )
470 textSymbolizerElement.appendChild( vo );
473 if ( maxDisplacement > 0 )
476 textSymbolizerElement.appendChild( vo );
481 textSymbolizerElement.appendChild( vo );
487 textSymbolizerElement.appendChild( vo );
490 if ( repeatDistance > 0 )
493 textSymbolizerElement.appendChild( vo );
499 textSymbolizerElement.appendChild( vo );
504 textSymbolizerElement.appendChild( vo );
509 textSymbolizerElement.appendChild( vo );
513 textSymbolizerElement.appendChild( vo );
527 resizeType = QStringLiteral(
"stretch" );
531 resizeType = QStringLiteral(
"proportional" );
534 textSymbolizerElement.appendChild( voResize );
537 QSizeF size = background.
size();
538 if ( size.width() > 0 || size.height() > 0 )
551 textSymbolizerElement.appendChild( voMargin );
567 if ( mSettings->drawLabels )
569 QDomDocument doc = parent.ownerDocument();
571 QDomElement ruleElement = doc.createElement( QStringLiteral(
"se:Rule" ) );
572 parent.appendChild( ruleElement );
575 if ( mSettings->scaleVisibility )
577 QVariantMap scaleProps = QVariantMap();
580 scaleProps.insert(
"scaleMinDenom",
qgsDoubleToString( mSettings->maximumScale ) );
581 scaleProps.insert(
"scaleMaxDenom",
qgsDoubleToString( mSettings->minimumScale ) );
593 Q_UNUSED( providerId )
Abstract base class - its implementations define different approaches to the labeling of a vector lay...
virtual bool accept(QgsStyleEntityVisitorInterface *visitor) const
Accepts the specified symbology visitor, causing it to visit all symbols associated with the labeling...
virtual void writeTextSymbolizer(QDomNode &parent, QgsPalLayerSettings &settings, const QVariantMap &props) const
Writes a TextSymbolizer element contents based on the provided labeling settings.
static QgsAbstractVectorLayerLabeling * create(const QDomElement &element, const QgsReadWriteContext &context)
Try to create instance of an implementation based on the XML data.
virtual QgsPalLayerSettings settings(const QString &providerId=QString()) const =0
Gets associated label settings.
virtual QString type() const =0
Unique type string of the labeling configuration implementation.
QString dump() const
Returns an expression string, constructed from the internal abstract syntax tree.
bool mergeLines() const
Returns true if connected line features with identical label text should be merged prior to generatin...
Abstract base class for marker symbol layers.
Contains settings for how a map layer will be labeled.
double yOffset
Vertical offset of label.
double maxCurvedCharAngleIn
Maximum angle between inside curved label characters (valid range 20.0 to 60.0).
double zIndex
Z-Index of label, where labels with a higher z-index are rendered on top of labels with a lower z-ind...
bool displayAll
If true, all features will be labelled even when overlaps occur.
double xOffset
Horizontal offset of label.
QgsExpression * getLabelExpression()
Returns the QgsExpression for this label settings.
QuadrantPosition quadOffset
Sets the quadrant in which to offset labels from feature.
@ ShowAll
Show upside down for all labels, including dynamic ones.
void readXml(const QDomElement &elem, const QgsReadWriteContext &context)
Read settings from a DOM element.
QgsUnitTypes::RenderUnit offsetUnits
Units for offsets of label.
double repeatDistance
Distance for repeating labels for a single feature.
@ PerimeterCurved
Arranges candidates following the curvature of a polygon's boundary. Applies to polygon layers only.
@ Curved
Arranges candidates following the curvature of a line feature. Applies to line layers only.
@ Horizontal
Arranges horizontal candidates scattered throughout a polygon feature. Applies to polygon layers only...
@ Free
Arranges candidates scattered throughout a polygon feature. Candidates are rotated to respect the pol...
@ OverPoint
Arranges candidates over a point (or centroid of a polygon), or at a preset offset from the point....
@ AroundPoint
Arranges candidates in a circle around a point (or centroid of a polygon). Applies to point or polygo...
@ Line
Arranges candidates parallel to a generalised line representing the feature or parallel to a polygon'...
@ OrderedPositionsAroundPoint
Candidates are placed in predefined positions around a point. Preference is given to positions with g...
@ OutsidePolygons
Candidates are placed outside of polygon boundaries. Applies to polygon layers only....
int priority
Label priority.
bool labelPerPart
true if every part of a multi-part feature should be labeled.
QgsUnitTypes::RenderUnit distUnits
Units the distance from feature to the label.
QgsUnitTypes::RenderUnit repeatDistanceUnit
Units for repeating labels for a single feature.
double angleOffset
Label rotation, in degrees clockwise.
double maxCurvedCharAngleOut
Maximum angle between outside curved label characters (valid range -20.0 to -95.0)
const QgsLabelLineSettings & lineSettings() const
Returns the label line settings, which contain settings related to how the label engine places and fo...
bool isExpression
true if this label is made from a expression string, e.g., FieldName || 'mm'
double dist
Distance from feature to the label.
const QgsTextFormat & format() const
Returns the label text formatting settings, e.g., font settings, buffer settings, etc.
UpsideDownLabels upsidedownLabels
Controls whether upside down labels are displayed and how they are handled.
QString fieldName
Name of field (or an expression) to use for label text.
The class is used as a container of context for various read/write operations on other objects.
static QgsRuleBasedLabeling * create(const QDomElement &element, const QgsReadWriteContext &context)
Create the instance from a DOM element with saved configuration.
void setShape(QgsSimpleMarkerSymbolLayerBase::Shape shape)
Sets the rendered marker shape.
Shape
Marker symbol shapes.
Simple marker symbol layer, consisting of a rendered shape with solid fill color and an stroke.
void setStrokeWidthUnit(QgsUnitTypes::RenderUnit u)
Sets the unit for the width of the marker's stroke.
void setStrokeWidth(double w)
Sets the width of the marker's stroke.
Capitalization
Capitalization options.
@ MixedCase
Mixed case, ie no change.
@ AllLowercase
Convert all characters to lowercase.
@ AllUppercase
Convert all characters to uppercase.
@ ForceFirstLetterToCapital
Convert just the first letter of each word to uppercase, leave the rest untouched.
An interface for classes which can visit style entity (e.g.
virtual bool visit(const QgsStyleEntityVisitorInterface::StyleLeaf &entity)
Called when the visitor will visit a style entity.
A label settings entity for QgsStyle databases.
void setStrokeWidth(double w)
void setStrokeWidthUnit(QgsUnitTypes::RenderUnit unit)
Sets the units for the stroke width.
static void createAnchorPointElement(QDomDocument &doc, QDomElement &element, QPointF anchor)
Creates a SE 1.1 anchor point element as a child of the specified element.
static void applyScaleDependency(QDomDocument &doc, QDomElement &ruleElem, QVariantMap &props)
Checks if the properties contain scaleMinDenom and scaleMaxDenom, if available, they are added into t...
static double rescaleUom(double size, QgsUnitTypes::RenderUnit unit, const QVariantMap &props)
Rescales the given size based on the uomScale found in the props, if any is found,...
static QDomElement createVendorOptionElement(QDomDocument &doc, const QString &name, const QString &value)
static void createDisplacementElement(QDomDocument &doc, QDomElement &element, QPointF offset)
static QDomElement createSvgParameterElement(QDomDocument &doc, const QString &name, const QString &value)
virtual QgsSymbolLayer * clone() const =0
Shall be reimplemented by subclasses to create a deep copy of the instance.
QgsSymbolLayer * symbolLayer(int layer)
Returns the symbol layer at the specified index.
int symbolLayerCount() const
Returns the total number of symbol layers contained in the symbol.
Container for settings relating to a text background object.
RotationType rotationType() const
Returns the method used for rotating the background shape.
QString svgFile() const
Returns the absolute path to the background SVG file, if set.
QSizeF size() const
Returns the size of the background shape.
QgsUnitTypes::RenderUnit strokeWidthUnit() const
Returns the units used for the shape's stroke width.
@ SizePercent
Shape size is determined by percent of text size.
@ SizeBuffer
Shape size is determined by adding a buffer margin around text.
bool enabled() const
Returns whether the background is enabled.
double opacity() const
Returns the background shape's opacity.
QgsUnitTypes::RenderUnit offsetUnit() const
Returns the units used for the shape's offset.
double rotation() const
Returns the rotation for the background shape, in degrees clockwise.
QColor fillColor() const
Returns the color used for filing the background shape.
SizeType sizeType() const
Returns the method used to determine the size of the background shape (e.g., fixed size or buffer aro...
ShapeType type() const
Returns the type of background shape (e.g., square, ellipse, SVG).
double strokeWidth() const
Returns the width of the shape's stroke (stroke).
@ ShapeMarkerSymbol
Marker symbol.
@ ShapeSquare
Square - buffered sizes only.
@ ShapeRectangle
Rectangle.
QColor strokeColor() const
Returns the color used for outlining the background shape.
QgsUnitTypes::RenderUnit sizeUnit() const
Returns the units used for the shape's size.
@ RotationFixed
Shape rotation is a fixed angle.
QgsMarkerSymbol * markerSymbol() const
Returns the marker symbol to be rendered in the background.
QPointF offset() const
Returns the offset used for drawing the background shape.
Container for settings relating to a text buffer.
double size() const
Returns the size of the buffer.
bool enabled() const
Returns whether the buffer is enabled.
double opacity() const
Returns the buffer opacity.
QgsUnitTypes::RenderUnit sizeUnit() const
Returns the units for the buffer size.
QColor color() const
Returns the color of the buffer.
Container for all settings relating to text rendering.
QgsUnitTypes::RenderUnit sizeUnit() const
Returns the units for the size of rendered text.
QgsTextBackgroundSettings & background()
Returns a reference to the text background settings.
double opacity() const
Returns the text's opacity.
double size() const
Returns the size for rendered text.
QgsStringUtils::Capitalization capitalization() const
Returns the text capitalization style.
QColor color() const
Returns the color that text will be rendered in.
QFont font() const
Returns the font used for rendering text.
QgsTextBufferSettings & buffer()
Returns a reference to the text buffer settings.
RenderUnit
Rendering size units.
The QgsVectorLayerLabelProvider class implements a label provider for vector layers.
Basic implementation of the labeling interface.
QString type() const override
Unique type string of the labeling configuration implementation.
bool accept(QgsStyleEntityVisitorInterface *visitor) const override
Accepts the specified symbology visitor, causing it to visit all symbols associated with the labeling...
QgsPalLayerSettings settings(const QString &providerId=QString()) const override
Gets associated label settings.
QDomElement save(QDomDocument &doc, const QgsReadWriteContext &context) const override
Returns labeling configuration as XML element.
bool requiresAdvancedEffects() const override
Returns true if drawing labels requires advanced effects like composition modes, which could prevent ...
QgsVectorLayerSimpleLabeling(const QgsPalLayerSettings &settings)
Constructs simple labeling configuration with given initial settings.
void setSettings(QgsPalLayerSettings *settings, const QString &providerId=QString()) override
Set pal settings (takes ownership).
QgsVectorLayerLabelProvider * provider(QgsVectorLayer *layer) const override
static QgsVectorLayerSimpleLabeling * create(const QDomElement &element, const QgsReadWriteContext &context)
Create the instance from a DOM element with saved configuration.
QgsAbstractVectorLayerLabeling * clone() const override
Returns a new copy of the object.
void toSld(QDomNode &parent, const QVariantMap &props) const override
Writes the SE 1.1 TextSymbolizer element based on the current layer labeling settings.
Represents a vector layer which manages a vector based data sets.
double ANALYSIS_EXPORT angle(QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *p4)
Calculates the angle between two segments (in 2 dimension, z-values are ignored)
QString qgsDoubleToString(double a, int precision=17)
Returns a string representation of a double.
void appendSimpleFunction(QDomDocument &doc, QDomElement &parent, const QString &name, const QString &attribute)
QPointF quadOffsetToSldAnchor(QgsPalLayerSettings::QuadrantPosition quadrantPosition)
std::unique_ptr< QgsMarkerSymbolLayer > backgroundToMarkerLayer(const QgsTextBackgroundSettings &settings)