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feat(ui): trail Units setting — km/h, mph, min/km, min/mi

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Second row in the Config view: UP/DOWN moves focus between Min dist
and Units, LEFT/RIGHT cycles the focused row's value. Units propagates
to the Summary view, which now shows either "Avg: N km/h" / "N mph"
or "Pace: M:SS /km" / "/mi" depending on the choice.

Pace renders as "--:-- /unit" when distance or elapsed time is zero
(avoids divide-by-zero glitches with one-point trails). mph conversion
uses the 0.621371 ratio with rounding; pace works in floating point
off raw metres and seconds for accuracy at low speeds.

NodePrefs gains trail_units_idx as another reserved-ish byte; old saves
load with 0 = km/h, no schema bump needed since the rd() lambda already
defaults missing fields to zero.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-05-25 13:16:02 +02:00
parent 72fbbf2400
commit 46ac292b36
4 changed files with 91 additions and 14 deletions
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15
examples/companion_radio/Trail.h
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@@ -40,6 +40,21 @@ public:
return L[idx < MIN_DELTA_COUNT ? idx : 0];
}
// Speed / pace display units. UNITS_KMH / UNITS_MPH show speed; UNITS_PACE_KM
// / UNITS_PACE_MI show time per distance ("pace"). Index 0 = km/h default.
enum Units : uint8_t {
UNITS_KMH = 0,
UNITS_MPH = 1,
UNITS_PACE_KM = 2,
UNITS_PACE_MI = 3,
};
static const uint8_t UNITS_COUNT = 4;
static const char* unitLabel(uint8_t idx) {
static const char* L[UNITS_COUNT] = { "km/h", "mph", "min/km", "min/mi" };
return L[idx < UNITS_COUNT ? idx : 0];
}
static bool unitIsPace(uint8_t idx) { return idx == UNITS_PACE_KM || idx == UNITS_PACE_MI; }
bool isActive() const { return _active; }
void setActive(bool a) {
if (a && !_active) {