QGIS API Documentation
3.26.3-Buenos Aires (65e4edfdad)
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29 return QStringLiteral(
"Double Box" );
34 return QObject::tr(
"Double Box" );
67 QPainter *painter = context.
painter();
78 std::unique_ptr< QgsLineSymbol > lineSymbol( settings.
lineSymbol()->
clone() );
79 lineSymbol->startRender( context );
81 std::unique_ptr< QgsFillSymbol > fillSymbol1( settings.
fillSymbol()->
clone() );
82 fillSymbol1->startRender( context );
85 fillSymbol2->startRender( context );
87 painter->setPen( Qt::NoPen );
88 painter->setBrush( Qt::NoBrush );
94 const QList<double> positions =
segmentPositions( context, scaleContext, settings );
95 const QList<double> widths =
segmentWidths( scaleContext, settings );
100 for (
int i = 0; i < positions.size(); ++i )
105 currentSymbol = fillSymbol1.get();
109 currentSymbol = fillSymbol2.get();
117 if ( i == positions.size() - 1 )
118 maxX = thisX + thisWidth;
120 const QRectF segmentRectTop( thisX, barTopPosition, thisWidth, segmentHeight );
122 << segmentRectTop.topLeft()
123 << segmentRectTop.topRight()
124 << segmentRectTop.bottomRight()
125 << segmentRectTop.bottomLeft()
126 << segmentRectTop.topLeft(),
127 nullptr,
nullptr, context );
128 painter->drawRect( segmentRectTop );
134 currentSymbol = fillSymbol2.get();
138 currentSymbol = fillSymbol1.get(); ;
141 const QRectF segmentRectBottom( thisX, barTopPosition + segmentHeight, thisWidth, segmentHeight );
144 << segmentRectBottom.topLeft()
145 << segmentRectBottom.topRight()
146 << segmentRectBottom.bottomRight()
147 << segmentRectBottom.bottomLeft()
148 << segmentRectBottom.topLeft(),
149 nullptr,
nullptr, context );
150 useColor = !useColor;
156 for (
int layer = 0; layer < lineSymbol->symbolLayerCount(); ++layer )
159 for (
int i = 1; i < positions.size(); ++i )
162 lineSymbol->renderPolyline( QPolygonF()
163 << QPointF( lineX, barTopPosition )
164 << QPointF( lineX, barTopPosition + segmentHeight * 2 ),
165 nullptr, context, layer );
169 lineSymbol->renderPolyline( QPolygonF()
170 << QPointF( minX, barTopPosition + segmentHeight )
171 << QPointF( maxX, barTopPosition + segmentHeight ),
172 nullptr, context, layer );
176 lineSymbol->renderPolyline( QPolygonF()
177 << QPointF( minX, barTopPosition )
178 << QPointF( maxX, barTopPosition )
179 << QPointF( maxX, barTopPosition + segmentHeight * 2 )
180 << QPointF( minX, barTopPosition + segmentHeight * 2 )
181 << QPointF( minX, barTopPosition ),
182 nullptr, context, layer );
185 lineSymbol->stopRender( context );
186 fillSymbol1->stopRender( context );
187 fillSymbol2->stopRender( context );
double height() const
Returns the scalebar height (in millimeters).
QgsLineSymbol * lineSymbol() const
Returns the line symbol used to render the scalebar (only used for some scalebar types).
QgsDoubleBoxScaleBarRenderer * clone() const override
Returns a clone of the renderer.
void setPainterFlagsUsingContext(QPainter *painter=nullptr) const
Sets relevant flags on a destination painter, using the flags and settings currently defined for the ...
Contains parameters regarding scalebar calculations.
@ FlagUsesUnitLabel
Renderer uses the QgsScaleBarSettings::unitLabel() setting.
QString id() const override
Returns the unique ID for this renderer.
QList< double > segmentWidths(const QgsScaleBarRenderer::ScaleBarContext &scaleContext, const QgsScaleBarSettings &settings) const
Returns a list of widths of each segment of the scalebar.
QgsLineSymbol * clone() const override
Returns a deep copy of this symbol.
@ FlagUsesFillSymbol
Renderer utilizes the scalebar fill symbol (see QgsScaleBarSettings::fillSymbol() )
@ FlagUsesAlternateFillSymbol
Renderer utilizes the alternate scalebar fill symbol (see QgsScaleBarSettings::alternateFillSymbol() ...
static QFontMetricsF fontMetrics(QgsRenderContext &context, const QgsTextFormat &format, double scaleFactor=1.0)
Returns the font metrics for the given text format, when rendered in the specified render context.
Contains information about the context of a rendering operation.
QgsFillSymbol * fillSymbol() const
Returns the primary fill symbol used to render the scalebar (only used for some scalebar types).
@ RenderMillimeters
Millimeters.
Flags flags() const override
Returns the scalebar rendering flags, which dictates the renderer's behavior.
@ FlagUsesLabelHorizontalPlacement
Renderer uses the QgsScaleBarSettings::labelHorizontalPlacement() setting.
int sortKey() const override
Returns a sorting key value, where renderers with a lower sort key will be shown earlier in lists.
double labelBarSpace() const
Returns the spacing (in millimeters) between labels and the scalebar.
@ FlagUsesLabelVerticalPlacement
Renderer uses the QgsScaleBarSettings::labelVerticalPlacement() setting.
double boxContentSpace() const
Returns the spacing (margin) between the scalebar box and content in millimeters.
LabelVerticalPlacement labelVerticalPlacement() const
Returns the vertical placement of text labels.
QgsTextFormat & textFormat()
Returns the text format used for drawing text in the scalebar.
@ FlagUsesLineSymbol
Renderer utilizes the scalebar line symbol (see QgsScaleBarSettings::lineSymbol() )
Double box with alternating colors.
The QgsScaleBarSettings class stores the appearance and layout settings for scalebar drawing with Qgs...
@ FlagRespectsMapUnitsPerScaleBarUnit
Renderer respects the QgsScaleBarSettings::mapUnitsPerScaleBarUnit() setting.
Q_DECL_DEPRECATED double firstLabelXOffset(const QgsScaleBarSettings &settings) const
Returns the x-offset (in millimeters) used for the first label in the scalebar.
void renderPolygon(const QPolygonF &points, const QVector< QPolygonF > *rings, const QgsFeature *f, QgsRenderContext &context, int layer=-1, bool selected=false)
Renders the symbol using the given render context.
double convertToPainterUnits(double size, QgsUnitTypes::RenderUnit unit, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::RenderSubcomponentProperty property=Qgis::RenderSubcomponentProperty::Generic) const
Converts a size from the specified units to painter units (pixels).
@ LabelAboveSegment
Labels are drawn above the scalebar.
QgsDoubleBoxScaleBarRenderer()=default
Constructor for QgsDoubleBoxScaleBarRenderer.
void drawDefaultLabels(QgsRenderContext &context, const QgsScaleBarSettings &settings, const QgsScaleBarRenderer::ScaleBarContext &scaleContext) const
Draws default scalebar labels using the specified settings and scaleContext to a destination render c...
@ FlagRespectsUnits
Renderer respects the QgsScaleBarSettings::units() setting.
QgsFillSymbol * clone() const override
Returns a deep copy of this symbol.
A fill symbol type, for rendering Polygon and MultiPolygon geometries.
@ FlagUsesLabelBarSpace
Renderer uses the QgsScaleBarSettings::labelBarSpace() setting.
@ FlagUsesSegments
Renderer uses the scalebar segments.
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsFillSymbol * alternateFillSymbol() const
Returns the secondary fill symbol used to render the scalebar (only used for some scalebar types).
void draw(QgsRenderContext &context, const QgsScaleBarSettings &settings, const QgsScaleBarRenderer::ScaleBarContext &scaleContext) const override
Draws the scalebar using the specified settings and scaleContext to a destination render context.
QString visibleName() const override
Returns the user friendly, translated name for the renderer.
Q_DECL_DEPRECATED QList< double > segmentPositions(const QgsScaleBarRenderer::ScaleBarContext &scaleContext, const QgsScaleBarSettings &settings) const
Returns a list of positions for each segment within the scalebar.