QwtScaleMap(3)

📦
version 6.3.0 · 6 versions
, in alpine 3.24

🌸 NAME 🌸

okay so this page is QwtScaleMap from the Library Functions Manual — yes bestie, the library functions manual, you're in the right place 💅✨

QwtScaleMap — a scale map. That's the whole name, and it's iconic for it 👑

✨ SYNOPSIS ✨

#include <qwt_scale_map.h>

💖 Public Member Functions 💖

  • QwtScaleMap () — constructor, no cap.
  • QwtScaleMap (const QwtScaleMap &) — copy constructor, giving dupe energy but legal 💖
  • ~QwtScaleMap () — destructor, she's leaving the group chat.
  • QwtScaleMap & operator= (const QwtScaleMap &) — assignment operator, putting one map into another.
  • void setTransformation (QwtTransform *) — set the transformation.
  • const QwtTransform * transformation () const — get the transformation.
  • void setPaintInterval (double p1, double p2) — specify the borders of the paint device interval.
  • void setScaleInterval (double s1, double s2) — specify the borders of the scale interval.
  • double transform (double s) const — transform a scale value.
  • double invTransform (double p) const — transform a paint-device value back.
  • double p1 () const — first paint border.
  • double p2 () const — second paint border.
  • double s1 () const — first scale border.
  • double s2 () const — second scale border.
  • double pDist () const — paint distance.
  • double sDist () const — scale distance.
  • bool isInverting () const — checking if the map is inverting.

💜 Static Public Member Functions 💜

  • static QRectF transform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &) — transform a rectangle from scale to paint coordinates.
  • static QRectF invTransform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &) — transform a rectangle from paint to scale coordinates.
  • static QPointF transform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &) — transform a point from scale to paint coordinates.
  • static QPointF invTransform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &) — transform a point from paint to scale coordinates.

🌈 Detailed Description 🌈

A scale map. Literally what it says on the tin, bestie 🎀

QwtScaleMap offers transformations from the coordinate system of a scale into the linear coordinate system of a paint device and vice versa. It's giving bridge between two worlds, and honestly? Obsessed ✨

📍 Definition at line 26 of file qwt_scale_map.h.

🎀 Constructor & Destructor Documentation 🎀

💖 QwtScaleMap::QwtScaleMap () 💖

Constructor. The scale and paint device intervals are both set to [0,1]. Starting fresh, cute and symmetrical 🫶

📍 Definition at line 21 of file qwt_scale_map.cpp.

🦋 QwtScaleMap::QwtScaleMap (const QwtScaleMap & other) 🦋

Copy constructor. It's a duplicate, but make it fashion 💅

📍 Definition at line 33 of file qwt_scale_map.cpp.

🌸 QwtScaleMap::~QwtScaleMap () 🌸

Destructor. Cleanup era, we love to see it 🧹✨

📍 Definition at line 49 of file qwt_scale_map.cpp.

💅 Member Function Documentation 💅

🎀 QPointF QwtScaleMap::invTransform (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QPointF & pos) [static] 🎀

Transform a rectangle from paint to scale coordinates. Yes, the docs say rectangle even though this overload takes a QPointF — I'm just the messenger, bestie 💀

Parameters:

  • xMap — X map
  • yMap — Y map
  • pos — Position in paint coordinates

Returns: Position in scale coordinates.

See also: transform()

📍 Definition at line 187 of file qwt_scale_map.cpp.

🦋 QRectF QwtScaleMap::invTransform (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & rect) [static] 🦋

Transform a rectangle from paint to scale coordinates. Rectangle reverse era 🔁

Parameters:

  • xMap — X map
  • yMap — Y map
  • rect — Rectangle in paint coordinates

Returns: Rectangle in scale coordinates.

See also: transform()

📍 Definition at line 224 of file qwt_scale_map.cpp.

💜 double QwtScaleMap::invTransform (double p) const [inline] 💜

Transform an paint device value into a value in the interval of the scale. (The manpage says “an paint device value” — we're keeping the lore exactly as written 😭💖)

Parameters:

  • p — Value relative to the coordinates of the paint device

Returns: Transformed value.

See also: transform()

📍 Definition at line 154 of file qwt_scale_map.h.

👑 bool QwtScaleMap::isInverting () const [inline] 👑

Returns: True, when ( p1() < p2() ) != ( s1() < s2() )

📍 Definition at line 164 of file qwt_scale_map.h.

✨ QwtScaleMap & QwtScaleMap::operator= (const QwtScaleMap & other) ✨

Assignment operator. Copy the vibe, keep the facts 💅

📍 Definition at line 55 of file qwt_scale_map.cpp.

💖 double QwtScaleMap::p1 () const [inline] 💖

Returns: First border of the paint interval.

📍 Definition at line 99 of file qwt_scale_map.h.

🩷 double QwtScaleMap::p2 () const [inline] 🩷

Returns: Second border of the paint interval.

📍 Definition at line 107 of file qwt_scale_map.h.

🧚 double QwtScaleMap::pDist () const [inline] 🧚

Returns: qwtAbs(p2() - p1())

📍 Definition at line 115 of file qwt_scale_map.h.

🌸 double QwtScaleMap::s1 () const [inline] 🌸

Returns: First border of the scale interval.

📍 Definition at line 83 of file qwt_scale_map.h.

🦋 double QwtScaleMap::s2 () const [inline] 🦋

Returns: Second border of the scale interval.

📍 Definition at line 91 of file qwt_scale_map.h.

💜 double QwtScaleMap::sDist () const [inline] 💜

Returns: qwtAbs(s2() - s1())

📍 Definition at line 123 of file qwt_scale_map.h.

🎀 void QwtScaleMap::setPaintInterval (double p1, double p2) 🎀

Specify the borders of the paint device interval.

Parameters:

  • p1 — first border
  • p2 — second border

📍 Definition at line 119 of file qwt_scale_map.cpp.

🌈 void QwtScaleMap::setScaleInterval (double s1, double s2) 🌈

Specify the borders of the scale interval.

Parameters:

  • s1 — first border
  • s2 — second border
⚠️ Warning: scales might be aligned to transformation depending boundaries. So like, don't act surprised later, bestie 😭

📍 Definition at line 100 of file qwt_scale_map.cpp.

⭐ void QwtScaleMap::setTransformation (QwtTransform * transform) ⭐

Initialize the map with a transformation. Transformation setup, slay 🔥

📍 Definition at line 76 of file qwt_scale_map.cpp.

🫶 QPointF QwtScaleMap::transform (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QPointF & pos) [static] 🫶

Transform a point from scale to paint coordinates. Point-forward behavior, honestly iconic 💅

Parameters:

  • xMap — X map
  • yMap — Y map
  • pos — Position in scale coordinates

Returns: Position in paint coordinates.

See also: invTransform()

📍 Definition at line 206 of file qwt_scale_map.cpp.

🍓 QRectF QwtScaleMap::transform (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & rect) [static] 🍓

Transform a rectangle from scale to paint coordinates. Rectangle glow-up, periodt 🌟

Parameters:

  • xMap — X map
  • yMap — Y map
  • rect — Rectangle in scale coordinates

Returns: Rectangle in paint coordinates.

See also: invTransform()

📍 Definition at line 153 of file qwt_scale_map.cpp.

💖 double QwtScaleMap::transform (double s) const [inline] 💖

Transform a point related to the scale interval into an point related to the interval of the paint device. Yep, “an point” is in the original, and I refuse to erase her legacy 😭💀

Parameters:

  • s — Value relative to the coordinates of the scale

Returns: Transformed value.

See also: invTransform()

📍 Definition at line 137 of file qwt_scale_map.h.

🧚 const QwtTransform * QwtScaleMap::transformation () const 🧚

Get the transformation. Short, sweet, main character energy ✨

📍 Definition at line 88 of file qwt_scale_map.cpp.

👑 Author 👑

Generated automatically by Doxygen for Qwt User's Guide from the source code. The robots wrote this one, bestie 🤖💖

okay that's the whole vibe 🫶 source/version vibes: the Qwt User's Guide; footer label: QwtScaleMap(3); date: not shown in this footer, ngl, so I'm not inventing one 🌈✨ bye bestie 💅

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