FragmentBase.java

/***
  Copyright (c) 2012 CommonsWare, LLC
  Licensed under the Apache License, Version 2.0 (the "License"); you may not
  use this file except in compliance with the License. You may obtain a copy
  of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
  by applicable law or agreed to in writing, software distributed under the
  License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
  OF ANY KIND, either express or implied. See the License for the specific
  language governing permissions and limitations under the License.
  
  Covered in detail in the book _The Busy Coder's Guide to Android Development_
    https://commonsware.com/Android
 */

package com.commonsware.android.scaleclip;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.SeekBar;

abstract public class FragmentBase extends Fragment implements
    SeekBar.OnSeekBarChangeListener {
  abstract void setImageBackground(ImageView image);

  private ImageView image=null;

  @Override
  public View onCreateView(LayoutInflater inflater,
                           ViewGroup container,
                           Bundle savedInstanceState) {
    setRetainInstance(true);

    View result=inflater.inflate(R.layout.scaleclip, container, false);
    SeekBar bar=((SeekBar)result.findViewById(R.id.level));

    bar.setOnSeekBarChangeListener(this);
    image=(ImageView)result.findViewById(R.id.image);
    setImageBackground(image);
    image.setImageLevel(bar.getProgress());

    return(result);
  }

  @Override
  public void onProgressChanged(SeekBar seekBar, int progress,
                                boolean fromUser) {
    image.setImageLevel(progress);
  }

  @Override
  public void onStartTrackingTouch(SeekBar seekBar) {
    // no-op
  }

  @Override
  public void onStopTrackingTouch(SeekBar seekBar) {
    // no-op
  }
}