QwtPlotMarker(3)

💖 NAME 💖

QwtPlotMarker — bestie, it's literally just that: the marker class. The lil' glow-up your plot needs when you want a line, a symbol, a label, or the whole combo sitting pretty inside a bounding rectangle. 👑

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✨ SYNOPSIS ✨

#include <qwt_plot_marker.h>

It inherits from QwtPlotItem, so it's got that plot-item bloodline. 🧬

🌸 Public Types 🌸

• enum LineStyle { NoLine, HLine, VLine, Cross }

🦋 Public Member Functions 🦋

• QwtPlotMarker ()
• virtual ~QwtPlotMarker ()
• virtual QwtDoubleRect boundingRect () const
• virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &) const
• QwtText label () const
• Qt::Alignment labelAlignment () const
• Qt::Orientation labelOrientation () const
• const QPen & linePen () const
• LineStyle lineStyle () const
• virtual int rtti () const
• void setLabel (const QwtText &)
• void setLabelAlignment (Qt::Alignment)
• void setLabelOrientation (Qt::Orientation)
• void setLinePen (const QPen &p)
• void setLineStyle (LineStyle st)
• void setSpacing (int)
• void setSymbol (const QwtSymbol &s)
• void setValue (double, double)
• void setValue (const QwtDoublePoint &)
• void setXValue (double)
• void setYValue (double)
• int spacing () const
• const QwtSymbol & symbol () const
• QwtDoublePoint value () const
• double xValue () const
• double yValue () const

🎀 Protected Member Functions 🎀

• void drawAt (QPainter *, const QRect &, const QPoint &) const

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💅 Detailed Description 💅

A class for drawing markers. That's the whole vibe. 🎯

Okay so a marker can be a horizontal line, a vertical line, a symbol, a label, or honestly any combination of them, and it gets drawn around a center point inside a bounding rectangle. Choose your own adventure, bestie.

The QwtPlotMarker::setSymbol() member assigns a symbol to the marker. That symbol gets drawn at the specified point. Slay. ✨

With QwtPlotMarker::setLabel(), a label can be assigned to the marker. The QwtPlotMarker::setLabelAlignment() member specifies where the label is drawn. All the Align*-constants in Qt::AlignmentFlags (see Qt documentation) are valid. And here's the tea — the interpretation of the alignment depends on the marker's line style. The alignment refers to the center point of the marker, which means, for example, that the label would be printed left above the center point if the alignment was set to AlignLeft|AlignTop. iykyk. 💁‍♀️

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🔥 Member Enumeration Documentation 🔥

enum QwtPlotMarker::LineStyle

Line styles. That's it, that's the enum. 😌

See also:

• setLineStyle(), lineStyle()

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💜 Member Function Documentation 💜

QwtDoubleRect QwtPlotMarker::boundingRect () const [virtual]

Returns: An invalid bounding rect: QwtDoubleRect(1.0, 1.0, -2.0, -2.0)

Reimplemented from QwtPlotItem. 🫶

void QwtPlotMarker::draw (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &canvasRect) const [virtual]

Draw the marker. Go little marker, go. 🎬

Parameters:

• painter — Painter
• xMap — x Scale Map
• yMap — y Scale Map
• canvasRect — Contents rect of the canvas in painter coordinates

Implements QwtPlotItem.

void QwtPlotMarker::drawAt (QPainter *painter, const QRect &canvasRect, const QPoint &pos) const [protected]

Draw the marker at a specific position. Very "I know exactly where I'm going" energy. 📍

Parameters:

• painter — Painter
• canvasRect — Contents rect of the canvas in painter coordinates
• pos — Position of the marker in painter coordinates

QwtText QwtPlotMarker::label () const

Returns: the label

See also: setLabel()

Qt::Alignment QwtPlotMarker::labelAlignment () const

Returns: the label alignment

See also: setLabelAlignment(), setLabelOrientation()

Qt::Orientation QwtPlotMarker::labelOrientation () const

Returns: the label orientation

See also: setLabelOrientation(), labelAlignment()

const QPen & QwtPlotMarker::linePen () const

Returns: the line pen

See also: setLinePen()

QwtPlotMarker::LineStyle QwtPlotMarker::lineStyle () const

Returns: the line style

See also: For a description of line styles, see QwtPlotMarker::setLineStyle()

int QwtPlotMarker::rtti () const [virtual]

Returns: QwtPlotItem::Rtti_PlotMarker

Reimplemented from QwtPlotItem.

void QwtPlotMarker::setLabel (const QwtText &label)

Set the label.

Parameters:

• label — label text

See also: label()

void QwtPlotMarker::setLabelAlignment (Qt::Alignment align)

Set the alignment of the label. Okay pay attention bestie, this one's got layers: 👇

• In case of QwtPlotMarker::HLine the alignment is relative to the y position of the marker, but the horizontal flags correspond to the canvas rectangle.
• In case of QwtPlotMarker::VLine the alignment is relative to the x position of the marker, but the vertical flags correspond to the canvas rectangle.
• In all other styles the alignment is relative to the marker's position.

Parameters:

• align — Alignment. A combination of AlignTop, AlignBottom, AlignLeft, AlignRight, AlignCenter, AlgnHCenter, AlignVCenter.

See also: labelAlignment(), labelOrientation()

void QwtPlotMarker::setLabelOrientation (Qt::Orientation orientation)

Set the orientation of the label. When orientation is Qt::Vertical the label is rotated by 90.0 degrees ( from bottom to top ). Spin it, girl. 🌀

Parameters:

• orientation — Orientation of the label

See also: labelOrientation(), setLabelAlignment()

void QwtPlotMarker::setLinePen (const QPen &pen)

Specify a pen for the line.

The width of non cosmetic pens is scaled according to the resolution of the paint device. 📐

Parameters:

• pen — New pen

See also: linePen(), QwtPainter::scaledPen()

void QwtPlotMarker::setLineStyle (QwtPlotMarker::LineStyle st)

Set the line style.

Parameters:

• st — Line style. Can be one of QwtPlotMarker::NoLine, HLine, VLine or Cross

See also: lineStyle()

void QwtPlotMarker::setSpacing (int spacing)

Set the spacing. When the label is not centered on the marker position, the spacing is the distance between the position and the label. Personal space matters. 🫧

Parameters:

• spacing — Spacing

See also: spacing(), setLabelAlignment()

void QwtPlotMarker::setSymbol (const QwtSymbol &s)

Assign a symbol.

Parameters:

• s — New symbol

See also: symbol()

int QwtPlotMarker::spacing () const

Returns: the spacing

See also: setSpacing()

const QwtSymbol & QwtPlotMarker::symbol () const

Returns: the symbol

See also: setSymbol(), QwtSymbol

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🌈 Author 🌈

Generated automatically by Doxygen for Qwt User's Guide from the source code. Not a human, just a very diligent robot. 🤖💖

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And that's the whole page, bestie. 🎀 This was the Qwt User's Guide manual, Version 5.2.3, dated Tue Nov 20 2012 — so yes, vintage, but still iconic. Mwah. 💅✨