fix #4260 & #3194: sort and resort problems

This fixes:
- #4260: sort by distance doesn't work
- #3914: resorting of event lists doesn't work

4 files changed, 18 insertions, 3 deletions

diff --git a/main/src/cgeo/geocaching/CacheListActivity.java b/main/src/cgeo/geocaching/CacheListActivity.java
index a817aa5..522004e 100644
--- a/main/src/cgeo/geocaching/CacheListActivity.java
+++ b/main/src/cgeo/geocaching/CacheListActivity.java
@@ -975,8 +975,9 @@ public class CacheListActivity extends AbstractListActivity implements FilteredA
 
     private void updateAdapter() {
         adapter.notifyDataSetChanged();
-        adapter.forceSort();
         adapter.reFilter();
+        adapter.checkEvents();
+        adapter.forceSort();
     }
 
     private void showFooterLoadingCaches() {
diff --git a/main/src/cgeo/geocaching/sorting/DistanceComparator.java b/main/src/cgeo/geocaching/sorting/DistanceComparator.java
index 541ce48..b3b751b 100644
--- a/main/src/cgeo/geocaching/sorting/DistanceComparator.java
+++ b/main/src/cgeo/geocaching/sorting/DistanceComparator.java
@@ -3,6 +3,7 @@ package cgeo.geocaching.sorting;
 import cgeo.geocaching.Geocache;
 import cgeo.geocaching.geopoint.Geopoint;
 
+import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -15,7 +16,17 @@ public class DistanceComparator extends AbstractCacheComparator {
     final private List<Geocache> list;
     private boolean cachedDistances;
 
-    public DistanceComparator(final Geopoint coords, List<Geocache> list) {
+    final static public DistanceComparator singleton = new DistanceComparator();
+
+    public DistanceComparator() {
+        // This constructor should not be used as a comparator as distances will not be updated.
+        // It is needed in order to really know we are sorting by Distances in the sort menu.
+        // If you need it for sorting, please use the second constructor.
+        coords = null;
+        list = new ArrayList<>();
+    }
+
+    public DistanceComparator(final Geopoint coords, final List<Geocache> list) {
         this.coords = coords;
         this.list = list;
     }
diff --git a/main/src/cgeo/geocaching/sorting/SortActionProvider.java b/main/src/cgeo/geocaching/sorting/SortActionProvider.java
index e9e65a0..6251984 100644
--- a/main/src/cgeo/geocaching/sorting/SortActionProvider.java
+++ b/main/src/cgeo/geocaching/sorting/SortActionProvider.java
@@ -62,7 +62,7 @@ public class SortActionProvider extends ActionProvider implements OnMenuItemClic
     }
 
     private void registerComparators() {
-        register(R.string.caches_sort_distance, null);
+        register(R.string.caches_sort_distance, DistanceComparator.class);
         register(R.string.caches_sort_date_hidden, DateComparator.class);
         register(R.string.caches_sort_difficulty, DifficultyComparator.class);
         register(R.string.caches_sort_finds, FindsComparator.class);
diff --git a/main/src/cgeo/geocaching/ui/CacheListAdapter.java b/main/src/cgeo/geocaching/ui/CacheListAdapter.java
index b879e54..eaede2a 100644
--- a/main/src/cgeo/geocaching/ui/CacheListAdapter.java
+++ b/main/src/cgeo/geocaching/ui/CacheListAdapter.java
@@ -179,6 +179,9 @@ public class CacheListAdapter extends ArrayAdapter<Geocache> {
         if (cacheComparator == null && eventsOnly) {
             return EventDateComparator.singleton;
         }
+        if (cacheComparator == null) {
+            return DistanceComparator.singleton;
+        }
         return cacheComparator;
     }