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GeoPos: pan continuously across 0° lat/lon (#3317) (#3323)

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* GeoPos: pan continuously across 0 deg lat/lon (#3317)

The DMS coordinate fields store an unsigned magnitude with the sign in a
separate hemisphere field (#3283). That made (-1, 0) representable but
left interactive panning unable to cross 0: at magnitude zero the minute/
degree carry clamps instead of flipping the hemisphere, so a 1-degree band
along the equator and the Greenwich meridian is skipped by the wheel.

Route each DMS field's encoder through a signed arcsecond model: a turn
moves the coordinate along the number line, and the hemisphere flip plus
magnitude reflection fall out of one set of fields being rewritten. E.g.
0 deg 0' 42" E minus one minute now gives 0 deg 0' 18" W as expected.

The old per-field on_wrap carry handlers are removed; the fields no longer
apply the turn locally.

* Correct latitude adjustment reporting logic

Fix adjustment logic to only report position if latitude changes.

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* GeoPos: apply the clamp-report guard to longitude too

The latitude fix (Copilot review) left adjust_lon() reporting a pan even
when set_lon_arcseconds() clamped at +-180 deg and changed nothing. Guard
it the same way: report only when the signed arcseconds actually changed.

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Mo
2026-09-19 18:00:47 +02:00
committed by GitHub
parent 5e1bb0f675
commit a88ba6d9a8
2 changed files with 119 additions and 55 deletions
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firmware/application/ui/ui_geomap.cpp
+79 -49
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@@ -64,19 +64,11 @@ GeoPos::GeoPos(
set_lon(0);
const auto changed_fn = [this](int32_t) {
// Convert degrees/minutes/seconds fields to decimal (floating point) lat/lon degree
float lat_value = lat();
float lon_value = lon();
text_lat_decimal.set(to_string_decimal(lat_value, 5));
text_lon_decimal.set(to_string_decimal(lon_value, 5));
if (on_change && report_change)
on_change(altitude(), lat_value, lon_value, speed());
report_position();
};
const auto changed_hemisphere_fn = [changed_fn](size_t, OptionsField::value_t) {
changed_fn(0);
const auto changed_hemisphere_fn = [this](size_t, OptionsField::value_t) {
report_position();
};
field_altitude.on_change = changed_fn;
@@ -90,44 +82,15 @@ GeoPos::GeoPos(
field_lon_minutes.on_change = changed_fn;
field_lon_seconds.on_change = changed_fn;
const auto wrapped_lat_seconds = [this](int32_t v) {
const auto old_minutes = field_lat_minutes.value();
field_lat_minutes.on_encoder(v);
if (field_lat_minutes.value() == old_minutes) {
field_lat_seconds.set_value((v > 0) ? 59 : 0);
}
};
// Degrees now holds a magnitude, so a minutes wrap always carries in the
// same direction regardless of hemisphere.
const auto wrapped_lat_minutes = [this](int32_t v) {
const auto old_degrees = field_lat_degrees.value();
field_lat_degrees.on_encoder(v);
if (field_lat_degrees.value() == old_degrees) {
field_lat_minutes.set_value((v > 0) ? 59 : 0);
}
};
const auto wrapped_lon_seconds = [this](int32_t v) {
const auto old_minutes = field_lon_minutes.value();
field_lon_minutes.on_encoder(v);
if (field_lon_minutes.value() == old_minutes) {
field_lon_seconds.set_value((v > 0) ? 59 : 0);
}
};
const auto wrapped_lon_minutes = [this](int32_t v) {
const auto old_degrees = field_lon_degrees.value();
field_lon_degrees.on_encoder(v);
if (field_lon_degrees.value() == old_degrees) {
field_lon_minutes.set_value((v > 0) ? 59 : 0);
}
};
field_lat_seconds.on_wrap = wrapped_lat_seconds;
field_lat_minutes.on_wrap = wrapped_lat_minutes;
field_lon_seconds.on_wrap = wrapped_lon_seconds;
field_lon_minutes.on_wrap = wrapped_lon_minutes;
// Route each DMS field's encoder through the signed arcsecond model so a turn moves
// the coordinate along the number line and crosses 0 correctly (issue #3317). One
// second is the base unit; minutes and degrees step by 60 and 3600 of it.
field_lat_degrees.on_delta = [this](int32_t d) { adjust_lat(d * 3600); };
field_lat_minutes.on_delta = [this](int32_t d) { adjust_lat(d * 60); };
field_lat_seconds.on_delta = [this](int32_t d) { adjust_lat(d); };
field_lon_degrees.on_delta = [this](int32_t d) { adjust_lon(d * 3600); };
field_lon_minutes.on_delta = [this](int32_t d) { adjust_lon(d * 60); };
field_lon_seconds.on_delta = [this](int32_t d) { adjust_lon(d); };
text_alt_unit.set(altitude_unit_ ? "m" : "ft");
if (speed_unit_ == KMPH) text_speed_unit.set("kmph");
@@ -199,6 +162,73 @@ float GeoPos::lon() {
return (field_lon_hemisphere.selected_index_value() != 0) ? -magnitude : magnitude;
};
int32_t GeoPos::lat_arcseconds() {
int32_t magnitude = field_lat_degrees.value() * 3600 + field_lat_minutes.value() * 60 + field_lat_seconds.value();
return (field_lat_hemisphere.selected_index_value() != 0) ? -magnitude : magnitude;
}
int32_t GeoPos::lon_arcseconds() {
int32_t magnitude = field_lon_degrees.value() * 3600 + field_lon_minutes.value() * 60 + field_lon_seconds.value();
return (field_lon_hemisphere.selected_index_value() != 0) ? -magnitude : magnitude;
}
void GeoPos::set_lat_arcseconds(int32_t arcseconds) {
if (arcseconds > lat_arcsecond_limit) arcseconds = lat_arcsecond_limit;
if (arcseconds < -lat_arcsecond_limit) arcseconds = -lat_arcsecond_limit;
bool south = arcseconds < 0;
int32_t magnitude = south ? -arcseconds : arcseconds;
field_lat_hemisphere.set_by_value(south ? 1 : 0);
field_lat_degrees.set_value(magnitude / 3600);
field_lat_minutes.set_value((magnitude / 60) % 60);
field_lat_seconds.set_value(magnitude % 60);
}
void GeoPos::set_lon_arcseconds(int32_t arcseconds) {
if (arcseconds > lon_arcsecond_limit) arcseconds = lon_arcsecond_limit;
if (arcseconds < -lon_arcsecond_limit) arcseconds = -lon_arcsecond_limit;
bool west = arcseconds < 0;
int32_t magnitude = west ? -arcseconds : arcseconds;
field_lon_hemisphere.set_by_value(west ? 1 : 0);
field_lon_degrees.set_value(magnitude / 3600);
field_lon_minutes.set_value((magnitude / 60) % 60);
field_lon_seconds.set_value(magnitude % 60);
}
// Rewrite the fields from a single signed value so a hemisphere flip and the magnitude
// reflection happen together. report_change is held off while the four fields settle,
// then the final position is reported once.
void GeoPos::adjust_lat(int32_t arcsecond_delta) {
const int32_t old_arcseconds = lat_arcseconds();
bool previous = report_change;
report_change = false;
set_lat_arcseconds(old_arcseconds + arcsecond_delta);
report_change = previous;
if (lat_arcseconds() != old_arcseconds)
report_position();
}
void GeoPos::adjust_lon(int32_t arcsecond_delta) {
const int32_t old_arcseconds = lon_arcseconds();
bool previous = report_change;
report_change = false;
set_lon_arcseconds(old_arcseconds + arcsecond_delta);
report_change = previous;
if (lon_arcseconds() != old_arcseconds)
report_position();
}
void GeoPos::report_position() {
// Convert degrees/minutes/seconds fields to decimal (floating point) lat/lon degree
float lat_value = lat();
float lon_value = lon();
text_lat_decimal.set(to_string_decimal(lat_value, 5));
text_lon_decimal.set(to_string_decimal(lon_value, 5));
if (on_change && report_change)
on_change(altitude(), lat_value, lon_value, speed());
}
int32_t GeoPos::altitude() {
return field_altitude.value();
};