Android Open Source - SmartNavi Info Window

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License

The source code is released under:
Apache License
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Java Source Code

package org.osmdroid.bonuspack.overlays;
//from  ww w.  j a  v a 2  s.c o m
import java.util.ArrayList;

import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/** View that can be displayed on an OSMDroid map, associated to a GeoPoint. 
 * Typical usage: cartoon-like bubbles displayed when clicking an overlay item. 
 * It mimics the InfoWindow class of Google Maps JavaScript API V3. 
 * Main differences are: 
 * <ul>
 * <li>Structure and content of the view is let to the responsibility of the caller. </li>
 * <li>The same InfoWindow can be associated to many items. </li>
 * </ul>
 * 
 * This is an abstract class. 
 * @see MarkerInfoWindow
 * @author M.Kergall
 */
public abstract class InfoWindow {

  protected View mView;
  protected boolean mIsVisible;
  protected MapView mMapView;
  
  /**
   * @param layoutResId  the id of the view resource. 
   * @param mapView  the mapview on which is hooked the view
   */
  public InfoWindow(int layoutResId, MapView mapView) {
    mMapView = mapView;
    mIsVisible = false;
    ViewGroup parent=(ViewGroup)mapView.getParent();
    Context context = mapView.getContext();
    LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    mView = inflater.inflate(layoutResId, parent, false);
    mView.setTag(this);
  }

  /**
   * Returns the Android view. This allows to set its content. 
   * @return the Android view
   */
  public View getView() {
    return(mView);
  }

  /**
   * open the InfoWindow at the specified GeoPosition + offset. 
   * If it was already opened, close it before reopening. 
   * @param object the graphical object on which is hooked the view
   * @param position to place the window on the map
   * @param offsetX (&offsetY) the offset of the view to the position, in pixels. 
   * This allows to offset the view from the object position. 
   */
  public void open(Object object, GeoPoint position, int offsetX, int offsetY) {
    close(); //if it was already opened
    onOpen(object);
    MapView.LayoutParams lp = new MapView.LayoutParams(
        MapView.LayoutParams.WRAP_CONTENT,
        MapView.LayoutParams.WRAP_CONTENT,
        position, MapView.LayoutParams.BOTTOM_CENTER, 
        offsetX, offsetY);
    mMapView.addView(mView, lp);
    mIsVisible = true;
  }
    
  public void close() {
    if (mIsVisible) {
      mIsVisible = false;
      ((ViewGroup)mView.getParent()).removeView(mView);
      onClose();
    }
  }
  
  public boolean isOpen(){
    return mIsVisible;
  }
  
  /** close all InfoWindows currently opened on this MapView */
  static public void closeAllInfoWindowsOn(MapView mapView){
    ArrayList<InfoWindow> opened = getOpenedInfoWindowsOn(mapView);
    for (InfoWindow infoWindow:opened){
      infoWindow.close();
    }
  }
  
  /** return all InfoWindows currently opened on this MapView */
  static public ArrayList<InfoWindow> getOpenedInfoWindowsOn(MapView mapView){
    int count = mapView.getChildCount();
    ArrayList<InfoWindow> opened = new ArrayList<InfoWindow>(count);
    for (int i = 0; i < count; i++) {
      final View child = mapView.getChildAt(i);
      Object tag = child.getTag();
      if (tag != null && tag instanceof InfoWindow){
        InfoWindow infoWindow = (InfoWindow)tag;
        opened.add(infoWindow);
      }
    }
    return opened;
  }
  
  //Abstract methods to implement in sub-classes:
  public abstract void onOpen(Object item);
  public abstract void onClose();
  
}
Java Source Code List
