// Find touched objects if any and emit accessible toast message
// with it's brief description.
private void describePointedObjects(RotatedTileBox tb, MotionEvent event) {
PointF point = new PointF(event.getX(), event.getY());
List<Object> ns = new ArrayList<Object>();
Map<Object, IContextMenuProvider> newSelectedObjects =
new LinkedHashMap<Object, ContextMenuLayer.IContextMenuProvider>();
for (OsmandMapLayer layer : mapView.getLayers()) {
if (layer instanceof IContextMenuProvider) {
ns.clear();
((IContextMenuProvider) layer).collectObjectsFromPoint(point, tb, ns);
for (Object o : ns) {
newSelectedObjects.put(o, (IContextMenuProvider) layer);
}
}
}
if (newSelectedObjects.isEmpty()) {
ns.clear();
collectObjectsFromPoint(point, tb, ns);
for (Object o : ns) {
newSelectedObjects.put(o, this);
}
}
if (different(newSelectedObjects, selectedObjects)) {
ContextMenuLayer contextMenuLayer = mapView.getLayerByClass(ContextMenuLayer.class);
if (contextMenuLayer != null) {
contextMenuLayer.setSelections(newSelectedObjects);
if (!ns.isEmpty())
mapView.showMessage(
mapView.getSettings().USE_SHORT_OBJECT_NAMES.get()
? contextMenuLayer.getSelectedObjectName()
: contextMenuLayer.getSelectedObjectDescription());
}
selectedObjects = newSelectedObjects;
}
}
@Override
public boolean onDown(MotionEvent e) {
if ((Build.VERSION.SDK_INT >= 14) || mapView.getSettings().SCROLL_MAP_BY_GESTURES.get())
return fallback.onDown(e);
ContextMenuLayer contextMenuLayer = mapView.getLayerByClass(ContextMenuLayer.class);
if (contextMenuLayer != null) contextMenuLayer.setSelections(null);
selectedObjects = null;
describePointedObjects(mapView.getCurrentRotatedTileBox(), e);
return false;
}