dials.cpp¶

file src/app/widgets/dials.cpp · Applications

Painting of the compass rose and the wind dial, and the wind angle helpers.

Source src/app/widgets/dials.cpp

Namespaces¶

Namespace	Description
`nmeasim::app`	The Qt Widgets desktop application: the main window, its dock panels, the map, the instruments and the settings dialog, built on `nmeasim::io`.

Declared or defined in this file and documented on the page of their namespace.

Member	Description
`nmeasim::app::signed_relative_angle`	Folds an angle relative to the bow into (-180, 180], negative to port.
`nmeasim::app::format_wind_angle`	Formats a wind angle relative to the bow as sailors say it: `104°P`, `30°S`, `0°` ahead or `180°` astern.

File-local functions

Name	Description
`pixel_font()`	Returns a copy of a font sized in pixels, so that dial text scales with the dial.
`degrees()`	Formats an angle for a compass readout with three integer digits and one decimal.

File-local variables

Name	Description
`kMargin`	Space between the tick ring and the widget edge, in pixels; the bezel takes 6 of them.
`kDegreesToRadians`	Factor that converts degrees to radians.

QFont pixel_font(const QFont& base, double pixels, bool bold)

Returns a copy of a font sized in pixels, so that dial text scales with the dial.

Parameters

Name	Type	Description
`base`	`const QFont&`	Font to copy the family and style from.
`pixels`	`double`	Text height in pixels; rounded, and raised to 1 when smaller.
`bold`	`bool`	True for a bold font.

Returns QFont: The resized font.

QString degrees(double value)

Formats an angle for a compass readout with three integer digits and one decimal.

Parameters

Name	Type	Description
`value`	`double`	Angle in degrees, expected in [0, 360).

Returns QString: The angle zero-padded to five characters with a degree sign, such as 045.0°.

double kMargin{8.0}

Space between the tick ring and the widget edge, in pixels; the bezel takes 6 of them.

double kDegreesToRadians{std::numbers::pi / 180.0}

Factor that converts degrees to radians.