Android Open Source - PicPosterComplete Pic Poster Controller

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License

The source code is released under:

Apache License

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Java Source Code

package ca.ualberta.cs.picposter.controller;
//w w  w.j  a v  a  2  s.c  om
import java.util.Date;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import ca.ualberta.cs.picposter.PicPosterActivity;
import ca.ualberta.cs.picposter.R;
import ca.ualberta.cs.picposter.model.PicPosterModelList;

/**
 * Controller for PicPost that scales Bitmaps, checks Text, etc.
 * @author zjullion
 */
public class PicPosterController {


  public static final int MAX_BITMAP_DIMENSIONS = 50;
  public static final int MAX_TEXT_LENGTH = 100;
  
  
  private PicPosterModelList model;
  private PicPosterActivity activity;
  
  
  public PicPosterController(PicPosterModelList model, PicPosterActivity activity) {
    this.model = model;
    this.activity = activity;
  }
  
  
  /**
   * Adds the new pic post to the model, adding a default pic and text if none is assigned, and 
   * scaling the pic and shortening text as necessary.
   * @param pic the Bitmap to be displayed in the post
   * @param text the String to be displayed in the post
   */
  public void addPicPost(Bitmap pic, String text) {
    
    //Assign a default pic if there is none:
    if (pic == null)
      pic = BitmapFactory.decodeResource(this.activity.getResources(), R.drawable.no_img);
    
    //Scale the pic if it is too large:
    if (pic.getWidth() > MAX_BITMAP_DIMENSIONS || pic.getHeight() > MAX_BITMAP_DIMENSIONS) {
      double scalingFactor = pic.getWidth() * 1.0 / MAX_BITMAP_DIMENSIONS;
      if (pic.getHeight() > pic.getWidth())
        scalingFactor = pic.getHeight() * 1.0 / MAX_BITMAP_DIMENSIONS;
      
      int newWidth = (int)Math.round(pic.getWidth() / scalingFactor);
      int newHeight = (int)Math.round(pic.getHeight() / scalingFactor);
      
      pic = Bitmap.createScaledBitmap(pic, newWidth, newHeight, false);
    }
    
    //Assign default text if there is none:
    if (text == null || text.length() == 0)
      text = this.activity.getResources().getString(R.string.no_pic_text);
    
    //Shorten the text if it is too long:
    if (text.length() > MAX_TEXT_LENGTH) {
      text = text.substring(0, MAX_TEXT_LENGTH);
    }
    
    this.model.addPicPost(pic, text, new Date());
  }
  
  
  public void clearModel() {
    this.model.clear();
  }
}

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