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geolocation/uc8: Update DbTrackingView to the static Geolocation API #232

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Merged
Artur- merged 1 commit into from
May 11, 2026
Merged

geolocation/uc8: Update DbTrackingView to the static Geolocation API #232

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12 changes: 6 additions & 6 deletions geolocation/src/main/java/com/example/uc8/DbTrackingView.java
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Original file line number Diff line number Diff line change
Expand Up @@ -11,11 +11,12 @@
import org.jspecify.annotations.Nullable;

import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.geolocation.Geolocation;
import com.vaadin.flow.component.geolocation.GeolocationError;
import com.vaadin.flow.component.geolocation.GeolocationOptions;
import com.vaadin.flow.component.geolocation.GeolocationPending;
import com.vaadin.flow.component.geolocation.GeolocationPosition;
import com.vaadin.flow.component.geolocation.GeolocationTracker;
import com.vaadin.flow.component.geolocation.GeolocationWatcher;
import com.vaadin.flow.component.grid.Grid;
import com.vaadin.flow.component.html.H1;
import com.vaadin.flow.component.html.H2;
Expand All @@ -42,7 +43,7 @@
* <p>
* Like UC2 but the database is the source of truth for the rendered data. A
* position listener registered via
* {@code GeolocationTracker.addPositionListener} persists each new
* {@code GeolocationWatcher.addPositionListener} persists each new
* {@link GeolocationPosition} via {@link TrackedPositionService}, and only then
* is the grid and the map line refreshed by re-reading the rows for this view's
* session id from the database. A "Clear history" button deletes the session's
Expand Down Expand Up @@ -71,7 +72,7 @@ public class DbTrackingView extends VerticalLayout {
private @Nullable LineStringFeature pathLine;
private @Nullable MarkerFeature startMarker;

private @Nullable GeolocationTracker tracker;
private @Nullable GeolocationWatcher tracker;
private final ValueSignal<Boolean> hasUpdates = new ValueSignal<>(
Boolean.FALSE);
private final ValueSignal<Integer> updateCount = new ValueSignal<>(0);
Expand Down Expand Up @@ -134,15 +135,14 @@ private void stopTracking() {
private void ensureTracker() {
GeolocationOptions options = GeolocationOptions.builder()
.highAccuracy(true).maximumAge(Duration.ZERO).build();
GeolocationTracker t = getUI().orElseThrow().getGeolocation()
.track(this, options);
GeolocationWatcher t = Geolocation.watchPosition(this, options);
tracker = t;

status.bindText(Signal.computed(() -> {
if (!t.activeSignal().get() && hasUpdates.get()) {
return "Stopped after " + updateCount.get() + " updates";
}
return switch (t.valueSignal().get()) {
return switch (t.positionSignal().get()) {
case GeolocationPending p -> "Waiting for first reading…";
case GeolocationPosition pos ->
"Saved update #" + updateCount.get() + " to DB";
Expand Down
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