QwtHueColorMap(3)

🎀 NAME 🎀

okay so this is the QwtHueColorMap(3) page from the Library Functions Manual, and the whole NAME section is literally this: QwtHueColorMap varies the hue value of the HSV color model. That's her whole thing, bestie 💅

---

✨ SYNOPSIS ✨

#include <qwt_color_map.h>

Inherits QwtColorMap.

💖 Public Member Functions 💖

• QwtHueColorMap (QwtColorMap::Format=QwtColorMap::RGB) — Constructor.
• virtual ~QwtHueColorMap () — Destructor.
• void setHueInterval (int hue1, int hue2)
• void setSaturation (int saturation) — sets the saturation coordinate.
• void setValue (int value) — sets the value coordinate.
• void setAlpha (int alpha) — sets the alpha coordinate.
• int hue1 () const
• int hue2 () const
• int saturation () const
• int value () const
• int alpha () const
• virtual QRgb rgb (const QwtInterval &, double value) const override

💜 Public Member Functions inherited from QwtColorMap 💜

• QwtColorMap (Format=QwtColorMap::RGB)
• virtual ~QwtColorMap () — Destructor.
• void setFormat (Format)
• virtual uint colorIndex (int numColors, const QwtInterval &interval, double value) const — Map a value of a given interval into a color index.
• QColor color (const QwtInterval &, double value) const
• virtual QVector< QRgb > colorTable (int numColors) const
• virtual QVector< QRgb > colorTable256 () const

🌈 Additional Inherited Members 🌈

• Public Types inherited from QwtColorMap: enum Format { RGB, Indexed }
• Public Attributes inherited from QwtColorMap: Format const

---

💅 Detailed Description 💅

QwtHueColorMap varies the hue value of the HSV color model. That's the vibe, that's the job 💖

You can use QwtHueColorMap to set up a color map easily — she runs cyclic over all colors. Each cycle has 360 different steps. Iconic behavior, no cap ✨

The values for value and saturation are in the range of 0 to 255 and doesn't depend on the data value to be mapped. Yes bestie, they said "doesn't" — I'm just the messenger 😭

See also: QwtSaturationValueColorMap

Definition at line 180 of file qwt_color_map.h.

---

🧚 Constructor & Destructor Documentation 🧚

🌸 QwtHueColorMap::QwtHueColorMap (QwtColorMap::Format format = QwtColorMap::RGB) [explicit] 🌸

Constructor. The hue interval is initialized by 0 to 359. All other coordinates are set to 255.

Parameters

• format — Format of the color map

See also: setHueInterval(), setSaturation(), setValue(), setValue() — and yes, the original page lists setValue() twice. I'm not fixing it, facts are facts 💀

Definition at line 723 of file qwt_color_map.cpp.

🦋 QwtHueColorMap::~QwtHueColorMap () [virtual] 🦋

Destructor. She's logging off, but make it graceful 💅

Definition at line 730 of file qwt_color_map.cpp.

---

👑 Member Function Documentation 👑

⭐ int QwtHueColorMap::alpha () const ⭐

Returns: Alpha coordinate

See also: setAlpha()

Definition at line 856 of file qwt_color_map.cpp.

⭐ int QwtHueColorMap::hue1 () const ⭐

Returns: First hue coordinate

See also: setHueInterval()

Definition at line 820 of file qwt_color_map.cpp.

⭐ int QwtHueColorMap::hue2 () const ⭐

Returns: Second hue coordinate

See also: setHueInterval()

Definition at line 829 of file qwt_color_map.cpp.

🔥 QRgb QwtHueColorMap::rgb (const QwtInterval & interval, double value) const [override], [virtual] 🔥

Map a value of a given interval into a RGB value. This is the main-character function, okay? 💅

Parameters

• interval — Range for all values
• value — Value to map into a RGB value

Returns: RGB value for value

Implements QwtColorMap.

Definition at line 869 of file qwt_color_map.cpp.

⭐ int QwtHueColorMap::saturation () const ⭐

Returns: Saturation coordinate

See also: setSaturation()

Definition at line 838 of file qwt_color_map.cpp.

🎀 void QwtHueColorMap::setAlpha (int alpha) 🎀

Sets the alpha coordinate. alpha needs to be in the range 0 to 255, where 255 means opaque and 0 means transparent.

Parameters

• alpha — Alpha coordinate

See also: alpha()

Definition at line 805 of file qwt_color_map.cpp.

🌈 void QwtHueColorMap::setHueInterval (int hue1, int hue2) 🌈

Sets the interval for the hue coordinate.

hue1/hue2 need to be positive number and can be > 360 to define cycles. F.e. 420 to 240 defines a map yellow/red/magenta/blue. Cycle queen behavior, honestly 👑

Parameters

• hue1 — First hue coordinate
• hue2 — Second hue coordinate

See also: hue1(), hue2()

Definition at line 746 of file qwt_color_map.cpp.

💜 void QwtHueColorMap::setSaturation (int saturation) 💜

Sets the saturation coordinate. saturation needs to be in the range 0 to 255, — yes, the original page really has that comma, bestie 😭

Parameters

• saturation — Saturation coordinate

See also: saturation()

Definition at line 764 of file qwt_color_map.cpp.

💜 void QwtHueColorMap::setValue (int value) 💜

Sets the value coordinate. value needs to be in the range 0 to 255, — same comma situation, we're keeping the energy 🫶

Parameters

• value — Value coordinate

See also: value()

Definition at line 784 of file qwt_color_map.cpp.

⭐ int QwtHueColorMap::value () const ⭐

Returns: Value coordinate

See also: setValue()

Definition at line 847 of file qwt_color_map.cpp.

---

🍓 Author 🍓

Generated automatically by Doxygen for Qwt User's Guide from the source code. She's a bot, but make it fashion 🤖💅

---

okay bestie, that's the whole page 💖 — source/version tea: Qwt User's Guide, manual name: QwtHueColorMap(3), and the date? The footer didn't list one, so consider this your official no-date zone 🫶✨