Android Open Source - sloop Main Display Fragment

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License

The source code is released under:

NON-LICENSE The Sloop data-browser source code is hereby released into the Public Domain. The original author, David Megginson, Megginson Technologies Ltd., and Acclar Open Ltd. provide no warranty:...

Java Source Code

package com.megginson.sloop.activities;
/*from   w w w  .  j  a  va 2s  .c  o  m*/
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.SeekBar;

import com.megginson.sloop.R;
import com.megginson.sloop.model.DataCollection;
import com.megginson.sloop.ui.DataCollectionPagerAdapter;

/**
 * Activity fragment for the main browser display area.
 * 
 * This fragment encapsulates part of the layout for MainActivity, including the
 * main display area for data records.
 * 
 * @author David Megginson
 */
public class MainDisplayFragment extends Fragment {

  private MainActivity mActivity;
  private ViewGroup mLayout;
  private DataCollectionPagerAdapter mPagerAdapter;
  private ViewPager mViewPager;
  private SeekBar mSeekBar;
  private ProgressBar mProgressBar;

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    mActivity = (MainActivity) getActivity();
    mLayout = (ViewGroup) inflater.inflate(R.layout.fragment_main_display,
        container);
    setupPager();
    setupProgressBar();
    setupSeekBar();
    return mLayout;
  }

  /**
   * Force the display to reset itself (usually after a filter change).
   */
  public void reset() {
    mViewPager.setAdapter(mPagerAdapter);
  }

  /**
   * Toggle showing the loading animation.
   * 
   * @param isLoading
   *            true to show the loading animation.
   */
  public void setLoading(boolean isLoading) {
    if (isLoading) {
      mProgressBar.setVisibility(View.VISIBLE);
    } else {
      mProgressBar.setVisibility(View.GONE);
    }
  }

  /**
   * Get the underlying data collection.
   * 
   * @return the data collection, or null if none is loaded.
   */
  public DataCollection getDataCollection() {
    return mPagerAdapter.getDataCollection();
  }

  /**
   * Set the underlying data collection.
   * 
   * @param dataCollection
   *            the data collection to display.
   */
  public void setDataCollection(DataCollection dataCollection) {
    mPagerAdapter.setDataCollection(dataCollection);
    if (dataCollection != null) {
      mSeekBar.setMax(mPagerAdapter.getCount() - 1);
    } else {
      mSeekBar.setProgress(0);
      mSeekBar.setMax(0);
    }
  }

  /**
   * Get the current item displayed.
   * 
   * @return the zero-based index of the current item.
   */
  public int getCurrentItem() {
    return mViewPager.getCurrentItem();
  }

  /**
   * Update the {@link SeekBar} to the current position.
   */
  public void refresh() {
    DataCollection collection = mPagerAdapter.getDataCollection();
    int filteredTotal = collection.getFilteredRecords().size();
    mSeekBar.setProgress(getCurrentItem());
    mSeekBar.setMax(filteredTotal - 1);
  }

  /**
   * Set up the main {@link ViewPager}.
   */
  private void setupPager() {
    mPagerAdapter = new DataCollectionPagerAdapter(
        mActivity.getSupportFragmentManager());

    // Set up the ViewPager with the data collection adapter.
    mViewPager = (ViewPager) mLayout.findViewById(R.id.pager);
    mViewPager.setAdapter(mPagerAdapter);
    mViewPager
        .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
          @Override
          public void onPageSelected(int position) {
            mActivity.doDisplayRecordNumber(position);
          }
        });
  }

  /**
   * Set up the {@link ProgressBar} loading animation (initially hidden).
   */
  private void setupProgressBar() {
    mProgressBar = (ProgressBar) mLayout.findViewById(R.id.progressBar);
    mProgressBar.setVisibility(View.GONE);
  }

  /**
   * Set up the {@link SeekBar}.
   */
  private void setupSeekBar() {
    mSeekBar = (SeekBar) mLayout.findViewById(R.id.page_seek_bar);
    mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

      @Override
      public void onStopTrackingTouch(SeekBar seekBar) {
        // NO OP
      }

      @Override
      public void onStartTrackingTouch(SeekBar seekBar) {
        // NO OP
      }

      @Override
      public void onProgressChanged(SeekBar seekBar, int progress,
          boolean fromUser) {
        mViewPager.setCurrentItem(progress, false);
      }
    });
  }

}

Java Source Code List

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