28 return QStringLiteral(
"hollow" );
33 return QObject::tr(
"Hollow" );
66 QPainter *painter = context.
painter();
77 std::unique_ptr< QgsLineSymbol > lineSymbol( settings.
lineSymbol()->
clone() );
78 lineSymbol->startRender( context );
80 std::unique_ptr< QgsFillSymbol > fillSymbol1( settings.
fillSymbol()->
clone() );
81 fillSymbol1->startRender( context );
84 fillSymbol2->startRender( context );
86 painter->setPen( Qt::NoPen );
87 painter->setBrush( Qt::NoBrush );
92 const QList<double> positions =
segmentPositions( context, scaleContext, settings );
93 const QList<double> widths =
segmentWidths( scaleContext, settings );
99 for (
int i = 0; i < positions.size(); ++i )
103 currentSymbol = fillSymbol1.get();
107 currentSymbol = fillSymbol2.get();
115 if ( i == positions.size() - 1 )
116 maxX = thisX + thisWidth;
118 QRectF segmentRect( thisX, barTopPosition, thisWidth, barHeight );
120 << segmentRect.topLeft()
121 << segmentRect.topRight()
122 << segmentRect.bottomRight()
123 << segmentRect.bottomLeft()
124 << segmentRect.topLeft(),
nullptr,
nullptr, context );
125 useColor = !useColor;
130 for (
int layer = 0; layer < lineSymbol->symbolLayerCount(); ++layer )
133 bool drawLine =
false;
134 for (
int i = 0; i < positions.size(); ++i )
136 drawLine = !drawLine;
142 lineSymbol->renderPolyline( QPolygonF()
143 << QPointF( lineX, barTopPosition + barHeight / 2.0 )
144 << QPointF( lineX + lineLength, barTopPosition + barHeight / 2.0 ),
145 nullptr, context, layer );
149 for (
int i = 1; i < positions.size(); ++i )
152 lineSymbol->renderPolyline( QPolygonF()
153 << QPointF( lineX, barTopPosition )
154 << QPointF( lineX, barTopPosition + barHeight ),
155 nullptr, context, layer );
159 lineSymbol->renderPolyline( QPolygonF()
160 << QPointF( minX, barTopPosition )
161 << QPointF( maxX, barTopPosition )
162 << QPointF( maxX, barTopPosition + barHeight )
163 << QPointF( minX, barTopPosition + barHeight )
164 << QPointF( minX, barTopPosition ),
165 nullptr, context, layer );
168 lineSymbol->stopRender( context );
169 fillSymbol1->stopRender( context );
170 fillSymbol2->stopRender( context );
180 std::unique_ptr< QgsFillSymbol > fillSymbol = qgis::make_unique< QgsFillSymbol >();
181 std::unique_ptr< QgsSimpleFillSymbolLayer > fillSymbolLayer = qgis::make_unique< QgsSimpleFillSymbolLayer >();
182 fillSymbolLayer->setColor( QColor( 0, 0, 0 ) );
183 fillSymbolLayer->setBrushStyle( Qt::NoBrush );
184 fillSymbolLayer->setStrokeStyle( Qt::NoPen );
185 fillSymbol->changeSymbolLayer( 0, fillSymbolLayer->clone() );
188 fillSymbol = qgis::make_unique< QgsFillSymbol >();
189 fillSymbolLayer->setColor( QColor( 255, 255, 255 ) );
190 fillSymbol->changeSymbolLayer( 0, fillSymbolLayer.release() );
A fill symbol type, for rendering Polygon and MultiPolygon geometries.
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.
QgsFillSymbol * clone() const override
Returns a deep copy of this symbol.
Scalebar style that draws a single box with alternating color for the segments, with horizontal lines...
int sortKey() const override
Returns a sorting key value, where renderers with a lower sort key will be shown earlier in lists.
bool applyDefaultSettings(QgsScaleBarSettings &settings) const override
Applies any default settings relating to the scalebar to the passed settings object.
QgsHollowScaleBarRenderer * clone() const override
Returns a clone of the renderer.
QString visibleName() const override
Returns the user friendly, translated name for the renderer.
QgsHollowScaleBarRenderer()=default
Constructor for QgsHollowScaleBarRenderer.
Flags flags() const override
Returns the scalebar rendering flags, which dictates the renderer's behavior.
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 id() const override
Returns the unique ID for this renderer.
QgsLineSymbol * clone() const override
Returns a deep copy of this symbol.
Contains information about the context of a rendering operation.
QPainter * painter()
Returns the destination QPainter for the render operation.
void setPainterFlagsUsingContext(QPainter *painter=nullptr) const
Sets relevant flags on a destination painter, using the flags and settings currently defined for the ...
double convertToPainterUnits(double size, QgsUnitTypes::RenderUnit unit, const QgsMapUnitScale &scale=QgsMapUnitScale()) const
Converts a size from the specified units to painter units (pixels).
@ FlagUsesLabelVerticalPlacement
Renderer uses the QgsScaleBarSettings::labelVerticalPlacement() setting.
@ FlagUsesLabelHorizontalPlacement
Renderer uses the QgsScaleBarSettings::labelHorizontalPlacement() setting.
@ FlagUsesLineSymbol
Renderer utilizes the scalebar line symbol (see QgsScaleBarSettings::lineSymbol() )
@ FlagUsesUnitLabel
Renderer uses the QgsScaleBarSettings::unitLabel() setting.
@ FlagUsesSegments
Renderer uses the scalebar segments.
@ FlagUsesLabelBarSpace
Renderer uses the QgsScaleBarSettings::labelBarSpace() setting.
@ FlagUsesFillSymbol
Renderer utilizes the scalebar fill symbol (see QgsScaleBarSettings::fillSymbol() )
@ FlagRespectsMapUnitsPerScaleBarUnit
Renderer respects the QgsScaleBarSettings::mapUnitsPerScaleBarUnit() setting.
@ FlagRespectsUnits
Renderer respects the QgsScaleBarSettings::units() setting.
@ FlagUsesAlternateFillSymbol
Renderer utilizes the alternate scalebar fill symbol (see QgsScaleBarSettings::alternateFillSymbol() ...
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...
QList< double > segmentWidths(const QgsScaleBarRenderer::ScaleBarContext &scaleContext, const QgsScaleBarSettings &settings) const
Returns a list of widths of each segment of the scalebar.
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.
Q_DECL_DEPRECATED double firstLabelXOffset(const QgsScaleBarSettings &settings) const
Returns the x-offset (in millimeters) used for the first label in the scalebar.
The QgsScaleBarSettings class stores the appearance and layout settings for scalebar drawing with Qgs...
QgsLineSymbol * lineSymbol() const
Returns the line symbol used to render the scalebar (only used for some scalebar types).
void setAlternateFillSymbol(QgsFillSymbol *symbol)
Sets the secondary fill symbol used to render the scalebar (only used for some scalebar types).
void setFillSymbol(QgsFillSymbol *symbol)
Sets the primary fill symbol used to render the scalebar (only used for some scalebar types).
double boxContentSpace() const
Returns the spacing (margin) between the scalebar box and content in millimeters.
QgsFillSymbol * alternateFillSymbol() const
Returns the secondary fill symbol used to render the scalebar (only used for some scalebar types).
QgsFillSymbol * fillSymbol() const
Returns the primary fill symbol used to render the scalebar (only used for some scalebar types).
LabelVerticalPlacement labelVerticalPlacement() const
Returns the vertical placement of text labels.
@ LabelAboveSegment
Labels are drawn above the scalebar.
double labelBarSpace() const
Returns the spacing (in millimeters) between labels and the scalebar.
QgsTextFormat & textFormat()
Returns the text format used for drawing text in the scalebar.
double height() const
Returns the scalebar height (in millimeters).
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.
@ RenderMillimeters
Millimeters.
Contains parameters regarding scalebar calculations.