Android Open Source - LinuxDayAppAndroid Geo Tag

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * GeoTag.java/*  w  ww. j  a  va 2  s .  co m*/
 * LinuxDayOSM
 * Copyright (C) Stefano Salvi 2010 <stefano@salvi.mn.it>
 *
 * LinuxDayOSM is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * LinuxDayOSM 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package it.mn.salvi.linuxDayOSM;

import android.app.Dialog;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.text.Spanned;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public abstract class GeoTag {
  protected GeoTag next;
  protected GeoPoint coords;
  protected Point absolutePos;
  
  private static final int SMALLICONLIMIT = 2048;

  public GeoTag (GeoTag next, GeoPoint coords) {
    this.next = next;
    if (coords != null) {
      setCoords (coords);
    }
  }

  public GeoTag getNext () {
    return next;
  }
  
  private PositionIcon getIconScale(int scale) {
    int i=0;
    if (scale < SMALLICONLIMIT) {
      i = 1;
    }
    return getIcon(i);
  }

  public boolean isHit (Point absolute, int scale) {
  PositionIcon i = getIconScale(scale);
  if (i != null && isActive()) {
    if (absolute.x >= (absolutePos.x - i.getRefPoint().x * scale) && absolute.x < (absolutePos.x + (i.getSize().width - i.getRefPoint().x) * scale) &&
      absolute.y >= (absolutePos.y - i.getRefPoint().y * scale) && absolute.y < (absolutePos.y + (i.getSize().height - i.getRefPoint().y) * scale)) {
      int x = (absolute.x - absolutePos.x) / scale + i.getRefPoint().x;
      int y = (absolute.y - absolutePos.y) / scale + i.getRefPoint().y;
      Bitmap b = i.getIcon();
      if (x >= 0 && x < b.getWidth() && y >= 0 && y < b.getHeight()) {
        int alpha = Color.alpha(b.getPixel(x, y));
        return alpha > 128;
      }
      return false;
    }
        return false;
  }
  return false;
  }

  public boolean isInto (Point absTopLeft, Point absBottomRight, int scale) {
    if (isActive()) {
      return absolutePos.x >= absTopLeft.x && absolutePos.x < absBottomRight.x && absolutePos.y >= absTopLeft.y && absolutePos.y < absBottomRight.y;
    }
    return false;
  }

  protected void setCoords (GeoPoint coords) {
    this.coords = coords;
    absolutePos = new Point(OsmBrowser.long2absolutex(coords.lon), OsmBrowser.lat2absolutey(coords.lat));
    // System.out.println("GeoTag Coords: lat" + coords.lat + " lon " + coords.lon + " AbsolutePos " + absolutePos.x + "x" + absolutePos.y);
  }

  public void paint (Canvas canvas, Paint paint, Point absTopLeft, Point absBottomRight, int scale) {
    if (absolutePos.x >= absTopLeft.x && absolutePos.x < absBottomRight.x && absolutePos.y >= absTopLeft.y && absolutePos.y < absBottomRight.y) {
      PositionIcon i = getIconScale(scale);
      if (i != null) {
        int x = (absolutePos.x - absTopLeft.x) / scale - i.getRefPoint().x;
        int y = (absolutePos.y - absTopLeft.y) / scale - i.getRefPoint().y;
        canvas.drawBitmap(i.getIcon(), x, y, paint);
      }
    }
  }
  
  protected void infoDialog (Context context, String title, Spanned content) {
    final Dialog dialog = new Dialog(context);
    dialog.setContentView(R.layout.ld_dialog_layout);
    dialog.setTitle(title);

    TextView text = (TextView) dialog.findViewById(R.id.content);
    text.setText(content);

    Button dialogButton = (Button) dialog.findViewById(R.id.close);
    // if button is clicked, close the custom dialog
    dialogButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        dialog.dismiss();
      }
    });

    dialog.show();

  }

  abstract public void action (Context context, Point p);
  abstract public boolean isActive();
  abstract public void setActive(boolean state);
  abstract public boolean canDisable();
  abstract public TagDescription getDescription();
  abstract public PositionIcon getIcon(int level);
  abstract public void initWithPreferences (SharedPreferences preferences);
}
Java Source Code List
