QGIS API Documentation
3.14.0-Pi (9f7028fd23)
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27 return QStringLiteral(
"stepped" );
32 return QObject::tr(
"Stepped Line" );
63 QPainter *painter = context.
painter();
66 sym->startRender( context ) ;
76 painter->setRenderHint( QPainter::Antialiasing,
true );
78 painter->setPen( Qt::NoPen );
82 QList<double> positions =
segmentPositions( context, scaleContext, settings );
83 QList<double> widths =
segmentWidths( scaleContext, settings );
87 for (
int i = 0; i < positions.size() + 1; ++i )
94 points << QPointF( x, barBottomPosition ) << QPointF( x, barTopPosition );
98 points << QPointF( x, barTopPosition ) << QPointF( x, barBottomPosition ) ;
102 sym->renderPolyline( points,
nullptr, context );
106 sym->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).
double convertToPainterUnits(double size, QgsUnitTypes::RenderUnit unit, const QgsMapUnitScale &scale=QgsMapUnitScale()) const
Converts a size from the specified units to painter units (pixels).
Contains parameters regarding scalebar calculations.
@ FlagUsesUnitLabel
Renderer uses the QgsScaleBarSettings::unitLabel() setting.
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.
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.
@ RenderMillimeters
Millimeters.
@ FlagUsesLabelHorizontalPlacement
Renderer uses the QgsScaleBarSettings::labelHorizontalPlacement() setting.
static QFontMetricsF fontMetrics(QgsRenderContext &context, const QgsTextFormat &format)
Returns the font metrics for the given text format, when rendered in the specified render context.
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() )
@ 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.
QgsSteppedLineScaleBarRenderer()=default
Constructor for QgsSteppedLineScaleBarRenderer.
int sortKey() const override
Returns a sorting key value, where renderers with a lower sort key will be shown earlier in lists.
@ LabelAboveSegment
Labels are drawn above the scalebar.
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.
Flags flags() const override
Returns the scalebar rendering flags, which dictates the renderer's behavior.
@ Antialiasing
Use antialiasing while drawing.
@ FlagUsesLabelBarSpace
Renderer uses the QgsScaleBarSettings::labelBarSpace() setting.
@ FlagUsesSegments
Renderer uses the scalebar segments.
QgsSteppedLineScaleBarRenderer * clone() const override
Returns a clone of the renderer.
QPainter * painter()
Returns the destination QPainter for the render operation.
QString id() const override
Returns the unique ID for this renderer.
QString visibleName() const override
Returns the user friendly, translated name for the renderer.
Flags flags() const
Returns combination of flags used for rendering.
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.