27#include <QFontMetricsF>
37 QPainter *painter = context.
painter();
48 const double xOffset = fontMetrics.horizontalAdvance( firstLabel ) / 2.0;
62 double currentLabelNumber = 0.0;
65 int segmentCounter = 0;
67 QString currentNumericLabel;
68 const QList<double> positions =
segmentPositions( context, scaleContext, settings );
83 for (
int i = 0; i < positions.size(); ++i )
85 if ( segmentCounter == 0 && nSegmentsLeft > 0 )
88 currentNumericLabel = firstLabel;
90 else if ( segmentCounter != 0 && segmentCounter == nSegmentsLeft )
92 currentLabelNumber = 0.0;
95 if ( segmentCounter >= nSegmentsLeft )
101 if ( ( segmentCounter == 0 || segmentCounter >= nSegmentsLeft ) && ( currentNumericLabel != QLatin1String(
"0" ) || drawZero ) )
107 if ( segmentCounter == 0 )
125 if ( segmentCounter >= nSegmentsLeft )
133 if ( !positions.isEmpty() )
150 - fontMetrics.horizontalAdvance( currentNumericLabel ) / 2.0 );
160 return QgsScaleBarRenderer::Flags();
179 firstLabelWidth = ( firstLabelWidth - scaleContext.
segmentWidth ) / 2;
183 firstLabelWidth = 0.0;
188 firstLabelWidth = firstLabelWidth / 2;
194 const QString largestLabel = largestNumberLabel +
' ' + settings.
unitLabel();
195 double largestLabelWidth;
201 largestLabelWidth = ( largestLabelWidth - scaleContext.
segmentWidth ) / 2;
205 largestLabelWidth = 0.0;
217 const double width = firstLabelWidth + totalBarLength + 2 * settings.
pen().widthF() + largestLabelWidth + 2 * settings.
boxContentSpace();
222 return QSizeF( width, height );
235 firstLabelWidth = ( firstLabelWidth - scaleContext.
segmentWidth ) / 2;
239 firstLabelWidth = 0.0;
244 firstLabelWidth = firstLabelWidth / 2;
250 const QString largestLabel = largestNumberLabel +
' ' + settings.
unitLabel();
251 double largestLabelWidth;
258 largestLabelWidth = ( largestLabelWidth - scaleContext.
segmentWidth ) / 2;
262 largestLabelWidth = 0.0;
277 const double width = firstLabelWidth + totalBarLength + 2 * lineWidth + largestLabelWidth + 2 * settings.
boxContentSpace();
285 height = settings.
height();
291 return QSizeF( width, height );
327 firstLabelWidth = ( firstLabelWidth - scaleContext.
segmentWidth ) / 2;
331 firstLabelWidth = 0.0;
336 firstLabelWidth = firstLabelWidth / 2;
338 return firstLabelWidth;
343 QList<double> positions;
355 positions << currentXCoord;
356 currentXCoord += leftSegmentSize;
362 positions << currentXCoord;
370 QList<double> positions;
383 positions << currentXCoord;
384 currentXCoord += leftSegmentSize;
390 positions << currentXCoord;
398 QList<double> widths;
407 widths << leftSegmentSize;
@ Millimeters
Millimeters.
RAII class to pop scope from an expression context on destruction.
Single scope for storing variables and functions for use within a QgsExpressionContext.
void addVariable(const QgsExpressionContextScope::StaticVariable &variable)
Adds a variable into the context scope.
static double fontAscentMM(const QFont &font)
Calculates a font ascent in millimeters, including workarounds for QT font rendering issues.
static double textWidthMM(const QFont &font, const QString &text)
Calculate a font width in millimeters for a text string, including workarounds for QT font rendering ...
A context for numeric formats.
Contains information about the context of a rendering operation.
double convertToPainterUnits(double size, Qgis::RenderUnit unit, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::RenderSubcomponentProperty property=Qgis::RenderSubcomponentProperty::Generic) const
Converts a size from the specified units to painter units (pixels).
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsExpressionContext & expressionContext()
Gets the expression context.
@ FlagUsesSubdivisionsHeight
Renderer uses the scalebar subdivisions height (see QgsScaleBarSettings::subdivisionsHeight() )
virtual Flags flags() const
Returns the scalebar rendering flags, which dictates the renderer's behavior.
virtual bool applyDefaultSettings(QgsScaleBarSettings &settings) const
Applies any default settings relating to the scalebar to the passed settings object.
virtual int sortKey() const
Returns a sorting key value, where renderers with a lower sort key will be shown earlier in lists.
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...
virtual Q_DECL_DEPRECATED QSizeF calculateBoxSize(const QgsScaleBarSettings &settings, const QgsScaleBarRenderer::ScaleBarContext &scaleContext) const
Calculates the required box size (in millimeters) for a scalebar using the specified settings and sca...
QString firstLabelString(const QgsScaleBarSettings &settings) const
Returns the text used for the first label in the scalebar.
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...
double subdivisionsHeight() const
Returns the scalebar subdivisions height (in millimeters) for segments included in the right part of ...
QgsLineSymbol * lineSymbol() const
Returns the line symbol used to render the scalebar (only used for some scalebar types).
const QgsNumericFormat * numericFormat() const
Returns the numeric format used for numbers in the scalebar.
int numberOfSegments() const
Returns the number of segments included in the scalebar.
double unitsPerSegment() const
Returns the number of scalebar units per segment.
QgsTextFormat & textFormat()
Returns the text format used for drawing text in the scalebar.
Q_DECL_DEPRECATED QPen pen() const
Returns the pen used for drawing outlines in the scalebar.
LabelHorizontalPlacement labelHorizontalPlacement() const
Returns the horizontal placement of text labels.
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.
QString unitLabel() const
Returns the label for units.
int numberOfSubdivisions() const
Returns the number of subdivisions for segments included in the right part of the scalebar (only used...
Q_DECL_DEPRECATED QFont font() const
Returns the font used for drawing text in the scalebar.
@ LabelCenteredSegment
Labels are drawn centered relative to segment.
@ LabelCenteredEdge
Labels are drawn centered relative to segment's edge.
@ LabelBelowSegment
Labels are drawn below the scalebar.
double labelBarSpace() const
Returns the spacing (in millimeters) between labels and the scalebar.
double height() const
Returns the scalebar height (in millimeters).
int numberOfSegmentsLeft() const
Returns the number of segments included in the left part of the scalebar.
double mapUnitsPerScaleBarUnit() const
Returns the number of map units per scale bar unit used by the scalebar.
static double estimateMaxSymbolBleed(QgsSymbol *symbol, const QgsRenderContext &context)
Returns the maximum estimated bleed for the symbol.
Container for all settings relating to text rendering.
QFont toQFont() const
Returns a QFont matching the relevant settings from this text format.
static double textWidth(const QgsRenderContext &context, const QgsTextFormat &format, const QStringList &textLines, QFontMetricsF *fontMetrics=nullptr)
Returns the width of a text based on a given format.
static void drawText(const QRectF &rect, double rotation, Qgis::TextHorizontalAlignment alignment, const QStringList &textLines, QgsRenderContext &context, const QgsTextFormat &format, bool drawAsOutlines=true, Qgis::TextVerticalAlignment vAlignment=Qgis::TextVerticalAlignment::Top, Qgis::TextRendererFlags flags=Qgis::TextRendererFlags(), Qgis::TextLayoutMode mode=Qgis::TextLayoutMode::Rectangle)
Draws text within a rectangle using the specified settings.
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.
static double textHeight(const QgsRenderContext &context, const QgsTextFormat &format, const QStringList &textLines, Qgis::TextLayoutMode mode=Qgis::TextLayoutMode::Point, QFontMetricsF *fontMetrics=nullptr, Qgis::TextRendererFlags flags=Qgis::TextRendererFlags(), double maxLineWidth=0)
Returns the height of a text based on a given format.
#define Q_NOWARN_DEPRECATED_POP
#define Q_NOWARN_DEPRECATED_PUSH
Single variable definition for use within a QgsExpressionContextScope.
Contains parameters regarding scalebar calculations.
Flags flags
Scalebar renderer flags.
double segmentWidth
The width, in millimeters, of each individual segment drawn.