Draggable marker sample (#869)

vtm-android-example/src/org/oscim/android/drag/DragMapView.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2012 Hannes Janetzek
+ * Copyright 2016-2020 devemux86
+ * Copyright 2018-2019 Gustl22
+ * Copyright 2021 Frank Knoll
+ *
+ * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
+ *
+ * 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.oscim.android.drag;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.GestureDetector;
+import org.oscim.android.MapView;
+import org.oscim.map.Map;
+import org.oscim.utils.Parameters;
+
+public class DragMapView extends MapView {
+
+    private DragGestureHandler gestureHandler;
+
+    public DragMapView(Context context) {
+        super(context);
+    }
+
+    public DragMapView(Context context, AttributeSet attributeSet) {
+        super(context, attributeSet);
+
+        if (!Parameters.MAP_EVENT_LAYER2) {
+            gestureHandler = new DragGestureHandler(mMap);
+            mGestureDetector = new GestureDetector(context, gestureHandler);
+            mGestureDetector.setOnDoubleTapListener(gestureHandler);
+        }
+    }
+
+    @Override
+    public boolean onTouchEvent(android.view.MotionEvent motionEvent) {
+        if (!isClickable()) {
+            return false;
+        }
+
+        if (motionEvent.getAction() == android.view.MotionEvent.ACTION_UP) {
+            if (gestureHandler.isScrolling()) {
+                gestureHandler.setScrolling(false);
+                return ((Map) mMap).handleGesture(DragGestureHandler.END_DRAG, mMotionEvent.wrap(motionEvent));
+            }
+        }
+
+        return super.onTouchEvent(motionEvent);
+    }
+}