MapViewPosition2 parameter and sample mapsforge#1044

docs/Changelog.md

@@ -6,6 +6,7 @@
 - MyLocationOverlay implementation [#1035](https://github.com/mapsforge/mapsforge/issues/1035)
 - Tile sources with api keys [#1028](https://github.com/mapsforge/mapsforge/issues/1028)
 - Render theme fallback internal resources [#1026](https://github.com/mapsforge/mapsforge/issues/1026)
+- MapViewPosition interface [#1044](https://github.com/mapsforge/mapsforge/pull/1044)
 - JTS (LocationTech) [#1027](https://github.com/mapsforge/mapsforge/issues/1027)
 - Many other minor improvements and bug fixes
 - [Solved issues](https://github.com/mapsforge/mapsforge/issues?q=is%3Aclosed+milestone%3A0.10.0)

mapsforge-core/src/main/java/org/mapsforge/core/util/Parameters.java

@@ -16,6 +16,11 @@
 
 public final class Parameters {
 
+    /**
+     * If true the <code>MapViewPosition2</code> will be used instead of default <code>MapViewPosition</code>.
+     */
+    public static boolean MAP_VIEW_POSITION2 = false;
+
     /**
      * Maximum buffer size for map files.
      */

mapsforge-map/src/main/java/org/mapsforge/map/model/Model.java

@@ -1,6 +1,7 @@
 /*
  * Copyright 2010, 2011, 2012, 2013 mapsforge.org
  * Copyright 2014 Ludwig M Brinckmann
+ * Copyright 2018 devemux86
  *
  * This program is free software: you can redistribute it and/or modify it under the
  * terms of the GNU Lesser General Public License as published by the Free Software
@@ -15,14 +16,23 @@
  */
 package org.mapsforge.map.model;
 
+import org.mapsforge.core.util.Parameters;
 import org.mapsforge.map.model.common.Persistable;
 import org.mapsforge.map.model.common.PreferencesFacade;
 
 public class Model implements Persistable {
     public final DisplayModel displayModel = new DisplayModel();
     public final FrameBufferModel frameBufferModel = new FrameBufferModel();
     public final MapViewDimension mapViewDimension = new MapViewDimension();
-    public final MapViewPosition mapViewPosition = new MapViewPosition(displayModel);
+    public final IMapViewPosition mapViewPosition;
+
+    public Model() {
+        if (Parameters.MAP_VIEW_POSITION2) {
+            mapViewPosition = new MapViewPosition2(displayModel);
+        } else {
+            mapViewPosition = new MapViewPosition(displayModel);
+        }
+    }
 
     @Override
     public void init(PreferencesFacade preferencesFacade) {

mapsforge-samples-android/AndroidManifest.xml

@@ -126,6 +126,9 @@
         <activity
             android:name=".LongPressAction"
             android:configChanges="keyboardHidden|orientation|screenSize" />
+        <activity
+            android:name=".MapViewPosition2Viewer"
+            android:configChanges="keyboardHidden|orientation|screenSize" />
         <activity
             android:name=".MoveAnimation"
             android:configChanges="keyboardHidden|orientation|screenSize" />

mapsforge-samples-android/src/main/java/org/mapsforge/samples/android/MapViewPosition2Viewer.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018 devemux86
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mapsforge.samples.android;
+
+import android.os.Bundle;
+
+import org.mapsforge.core.util.Parameters;
+
+public class MapViewPosition2Viewer extends DefaultTheme {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        Parameters.MAP_VIEW_POSITION2 = true;
+
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+
+        Parameters.MAP_VIEW_POSITION2 = false;
+    }
+}

mapsforge-samples-android/src/main/java/org/mapsforge/samples/android/Samples.java

@@ -186,6 +186,7 @@ public void onClick(DialogInterface dialog, int which) {
         linearLayout.addView(createButton(HillshadingCompareMapViewer.class));
         linearLayout.addView(createButton(ReverseGeocodeViewer.class));
         linearLayout.addView(createButton(NightModeViewer.class));
+        linearLayout.addView(createButton(MapViewPosition2Viewer.class));
         linearLayout.addView(createButton(RenderThemeChanger.class));
         linearLayout.addView(createButton(TileSizeChanger.class));
         linearLayout.addView(createButton(StackedLayersMapViewer.class));