Draggable marker sample (#869)

vtm-android-example/AndroidManifest.xml

@@ -34,6 +34,9 @@
         <activity
             android:name=".ClusterMarkerOverlayActivity"
             android:configChanges="keyboardHidden|orientation|screenSize" />
+        <activity
+            android:name=".DraggableMarkerOverlayActivity"
+            android:configChanges="keyboardHidden|orientation|screenSize" />
         <activity
             android:name=".FragmentActivity"
             android:configChanges="keyboardHidden|orientation|screenSize" />

vtm-android-example/res/layout/activity_map_draggable.xml

@@ -0,0 +1,10 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <org.oscim.android.drag.DragMapView
+        android:id="@+id/mapView"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent" />
+
+</RelativeLayout>

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

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2021 Frank Knoll
+ *
+ * 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 org.oscim.core.GeoPoint;
+
+public interface DragAndDropListener {
+
+    void startDragItemAtGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint);
+
+    void ongoingDragItemToGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint);
+
+    void dropItemAtGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint);
+}

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

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2013 Hannes Janetzek
+ * Copyright 2016 devemux86
+ * 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.view.MotionEvent;
+import org.oscim.android.input.AndroidMotionEvent;
+import org.oscim.android.input.GestureHandler;
+import org.oscim.event.Gesture;
+import org.oscim.map.Map;
+
+class DragGestureHandler extends GestureHandler {
+
+    public static final Gesture START_DRAG = new Gesture() {
+    };
+    public static final Gesture ONGOING_DRAG = new Gesture() {
+    };
+    public static final Gesture END_DRAG = new Gesture() {
+    };
+
+    private final AndroidMotionEvent mMotionEvent;
+    private final Map mMap;
+    private boolean scrolling = false;
+
+    public DragGestureHandler(Map map) {
+        super(map);
+        mMotionEvent = new AndroidMotionEvent();
+        mMap = map;
+    }
+
+    public boolean isScrolling() {
+        return scrolling;
+    }
+
+    public void setScrolling(boolean scrolling) {
+        this.scrolling = scrolling;
+    }
+
+    @Override
+    public void onShowPress(MotionEvent e) {
+        scrolling = true;
+        mMap.handleGesture(START_DRAG, mMotionEvent.wrap(e));
+    }
+
+    @Override
+    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
+        scrolling = true;
+        return mMap.handleGesture(ONGOING_DRAG, mMotionEvent.wrap(e2));
+    }
+}

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);
+    }
+}

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

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2012 osmdroid authors: Nicolas Gramlich, Theodore Hong, Fred Eisele
+ *
+ * Copyright 2013 Hannes Janetzek
+ * Copyright 2016-2021 devemux86
+ * Copyright 2016 Stephan Leuschner
+ * Copyright 2016 Pedinel
+ * Copyright 2019 Carlos Alberto Martínez Gadea
+ * 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 org.oscim.core.GeoPoint;
+import org.oscim.event.Gesture;
+import org.oscim.event.GestureListener;
+import org.oscim.event.MotionEvent;
+import org.oscim.layers.marker.ItemizedLayer;
+import org.oscim.layers.marker.MarkerInterface;
+import org.oscim.layers.marker.MarkerSymbol;
+import org.oscim.map.Map;
+
+import java.util.List;
+
+import static org.oscim.android.drag.DragGestureHandler.*;
+
+public class DraggableItemizedLayer extends ItemizedLayer implements GestureListener {
+
+    private final ItemDragger itemDragger;
+
+    public DraggableItemizedLayer(Map map,
+                                  List<MarkerInterface> markerItems,
+                                  MarkerSymbol defaultMarker,
+                                  OnItemGestureListener<MarkerInterface> listener) {
+        super(map, markerItems, defaultMarker, listener);
+        itemDragger = new ItemDragger(this, map);
+    }
+
+    @Override
+    protected boolean activateSelectedItems(MotionEvent event, ActiveItem task) {
+        return super.activateSelectedItems(event, task);
+    }
+
+    protected List<MarkerInterface> getMarkerItems() {
+        return mItemList;
+    }
+
+    @Override
+    public boolean onGesture(Gesture gesture, MotionEvent event) {
+        if (!isEnabled()) {
+            return false;
+        }
+
+        if (gesture == START_DRAG) {
+            return itemDragger.startDragItem(event, getGeoPoint(event));
+        } else if (gesture == ONGOING_DRAG) {
+            return itemDragger.ongoingDragItemTo(getGeoPoint(event));
+        } else if (gesture == END_DRAG) {
+            return itemDragger.dropItemAt(getGeoPoint(event));
+        } else {
+            itemDragger.noDrag();
+        }
+
+        return super.onGesture(gesture, event);
+    }
+
+    private GeoPoint getGeoPoint(MotionEvent event) {
+        return map().viewport().fromScreenPoint(event.getX(), event.getY());
+    }
+}

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

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2012 osmdroid authors:
+ * Copyright 2012 Nicolas Gramlich
+ * Copyright 2012 Theodore Hong
+ * Copyright 2012 Fred Eisele
+ *
+ * Copyright 2014 Hannes Janetzek
+ * Copyright 2016 devemux86
+ * Copyright 2016 Erik Duisters
+ * Copyright 2017 Longri
+ * 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 org.oscim.core.GeoPoint;
+import org.oscim.layers.marker.MarkerItem;
+
+public class DraggableMarkerItem extends MarkerItem {
+
+    private final DragAndDropListener dragAndDropListener;
+
+    public DraggableMarkerItem(String title, String description, GeoPoint geoPoint, DragAndDropListener dragAndDropListener) {
+        super(title, description, geoPoint);
+        this.dragAndDropListener = dragAndDropListener;
+    }
+
+    public DragAndDropListener getDragAndDropListener() {
+        return dragAndDropListener;
+    }
+}

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

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2021 Frank Knoll
+ *
+ * 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 org.oscim.core.GeoPoint;
+import org.oscim.event.MotionEvent;
+import org.oscim.layers.marker.ItemizedLayer;
+import org.oscim.layers.marker.MarkerItem;
+import org.oscim.layers.marker.MarkerLayer;
+import org.oscim.map.Map;
+
+class ItemDragger {
+
+    private final DraggableItemizedLayer draggableItemizedLayer;
+    private final DragAndDropListener dragItemAndRedrawListener;
+    private DraggableMarkerItem dragItem;
+
+    public ItemDragger(DraggableItemizedLayer draggableItemizedLayer, Map map) {
+        this.draggableItemizedLayer = draggableItemizedLayer;
+        this.dragItemAndRedrawListener = createDragItemAndRedrawListener(draggableItemizedLayer, map);
+    }
+
+    public boolean startDragItem(MotionEvent event, final GeoPoint geoPoint) {
+        dragItem = null;
+        return draggableItemizedLayer.activateSelectedItems(
+                event,
+                new ItemizedLayer.ActiveItem() {
+                    @Override
+                    public boolean run(int index) {
+                        dragItem = (DraggableMarkerItem) draggableItemizedLayer.getMarkerItems().get(index);
+                        dragItemAndRedrawListener.startDragItemAtGeoPoint(dragItem, geoPoint);
+                        return true;
+                    }
+                });
+    }
+
+    public boolean ongoingDragItemTo(GeoPoint geoPoint) {
+        if (dragItem == null) {
+            return false;
+        }
+        dragItemAndRedrawListener.ongoingDragItemToGeoPoint(dragItem, geoPoint);
+        return true;
+    }
+
+    public boolean dropItemAt(GeoPoint geoPoint) {
+        if (dragItem == null) {
+            return false;
+        }
+        dragItemAndRedrawListener.dropItemAtGeoPoint(dragItem, geoPoint);
+        return true;
+    }
+
+    public void noDrag() {
+        dragItem = null;
+    }
+
+    private DragAndDropListener createDragItemAndRedrawListener(final MarkerLayer markerLayer, final Map map) {
+        return new DragAndDropListener() {
+            @Override
+            public void startDragItemAtGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint) {
+                item.getDragAndDropListener().startDragItemAtGeoPoint(item, geoPoint);
+                updateLocationOfMarkerItemAndRedraw(item, geoPoint);
+            }
+
+            @Override
+            public void ongoingDragItemToGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint) {
+                item.getDragAndDropListener().ongoingDragItemToGeoPoint(item, geoPoint);
+                updateLocationOfMarkerItemAndRedraw(item, geoPoint);
+            }
+
+            @Override
+            public void dropItemAtGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint) {
+                item.getDragAndDropListener().dropItemAtGeoPoint(item, geoPoint);
+                updateLocationOfMarkerItemAndRedraw(item, geoPoint);
+            }
+
+            private void updateLocationOfMarkerItemAndRedraw(MarkerItem markerItem, GeoPoint location) {
+                markerItem.geoPoint = location;
+                markerLayer.populate();
+                map.render();
+            }
+        };
+    }
+}

vtm-android-example/src/org/oscim/android/test/DraggableMarkerOverlayActivity.java

@@ -0,0 +1,105 @@
+/*
+ * Copyright 2014 Hannes Janetzek
+ * Copyright 2016-2020 devemux86
+ * 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.test;
+
+import android.graphics.BitmapFactory;
+import android.os.Bundle;
+import android.util.Log;
+import org.oscim.android.canvas.AndroidBitmap;
+import org.oscim.android.drag.DragAndDropListener;
+import org.oscim.android.drag.DraggableItemizedLayer;
+import org.oscim.android.drag.DraggableMarkerItem;
+import org.oscim.core.GeoPoint;
+import org.oscim.layers.marker.ItemizedLayer;
+import org.oscim.layers.marker.MarkerInterface;
+import org.oscim.layers.marker.MarkerSymbol;
+import org.oscim.layers.marker.MarkerSymbol.HotspotPlace;
+import org.oscim.layers.tile.bitmap.BitmapTileLayer;
+import org.oscim.tiling.source.OkHttpEngine;
+import org.oscim.tiling.source.UrlTileSource;
+import org.oscim.tiling.source.bitmap.DefaultSources;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class DraggableMarkerOverlayActivity extends MapActivity {
+
+    public DraggableMarkerOverlayActivity() {
+        super(R.layout.activity_map_draggable);
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        createLayers();
+    }
+
+    void createLayers() {
+        UrlTileSource tileSource = DefaultSources.OPENSTREETMAP
+                .httpFactory(new OkHttpEngine.OkHttpFactory())
+                .build();
+        tileSource.setHttpRequestHeaders(Collections.singletonMap("User-Agent", "vtm-android-example"));
+        mMap.layers().add(new BitmapTileLayer(mMap, tileSource));
+
+        ItemizedLayer mMarkerLayer = new DraggableItemizedLayer(
+                mMap,
+                new ArrayList<MarkerInterface>(),
+                new MarkerSymbol(
+                        new AndroidBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.marker_poi)),
+                        HotspotPlace.BOTTOM_CENTER),
+                null);
+        mMap.layers().add(mMarkerLayer);
+
+        DragAndDropListener dragAndDropListener = new DragAndDropListener() {
+            @Override
+            public void startDragItemAtGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint) {
+                Log.i(DraggableMarkerOverlayActivity.this.getClass().getSimpleName(), "startDragItemAtGeoPoint: " + geoPoint);
+            }
+
+            @Override
+            public void ongoingDragItemToGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint) {
+                Log.i(DraggableMarkerOverlayActivity.this.getClass().getSimpleName(), "ongoingDragItemToGeoPoint: " + geoPoint);
+            }
+
+            @Override
+            public void dropItemAtGeoPoint(DraggableMarkerItem item, GeoPoint geoPoint) {
+                Log.i(DraggableMarkerOverlayActivity.this.getClass().getSimpleName(), "dropItemAtGeoPoint: " + geoPoint);
+            }
+        };
+
+        List<MarkerInterface> pts = new ArrayList<>();
+        for (double lat = -90; lat <= 90; lat += 45) {
+            for (double lon = -180; lon <= 180; lon += 45) {
+                pts.add(new DraggableMarkerItem(lat + "/" + lon, "", new GeoPoint(lat, lon), dragAndDropListener));
+            }
+        }
+
+        mMarkerLayer.addItems(pts);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        /* ignore saved position */
+        mMap.setMapPosition(0, 0, 1 << 2);
+    }
+}

vtm-android-example/src/org/oscim/android/test/Samples.java

@@ -124,6 +124,7 @@ public class Samples extends Activity {
         linearLayout.addView(createButton(JeoIndoorActivity.class));
         linearLayout.addView(createButton(GdxPoi3DActivity.class));
         linearLayout.addView(createButton(OverpassActivity.class));
+        linearLayout.addView(createButton(DraggableMarkerOverlayActivity.class));
         linearLayout.addView(createButton(ClusterMarkerOverlayActivity.class));
         linearLayout.addView(createButton(FragmentActivity.class));
     }