Android Open Source - BBC-News-Reader Seek Bar Preference

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License

The source code is released under:

Copyright (c) 2011, 2012, Digital Lizard (Oscar Key, Thomas Boby) All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the...

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Java Source Code

/*******************************************************************************
 * BBC News Reader//w  ww  .  j  ava 2 s . c o  m
 * Released under the BSD License. See README or LICENSE.
 * Copyright (c) 2011, Digital Lizard (Oscar Key, Thomas Boby)
 * All rights reserved.
 ******************************************************************************/
/* The following code was written by Matthew Wiggins 
 * and is released under the APACHE 2.0 license 
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 */
package com.hlidskialf.android.preference;

import android.content.Context;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;


public class SeekBarPreference extends DialogPreference implements SeekBar.OnSeekBarChangeListener
{
  private static final String androidns="http://schemas.android.com/apk/res/android";

  private SeekBar mSeekBar;
  private TextView mSplashText,mValueText;
  private Context mContext;

  private String mDialogMessage, mSuffix;
  private int mDefault, mMax, mValue = 0;

  public SeekBarPreference(Context context, AttributeSet attrs) { 
    super(context,attrs); 
    mContext = context;

    mDialogMessage = attrs.getAttributeValue(androidns,"dialogMessage");
    mSuffix = attrs.getAttributeValue(androidns,"text");
    mDefault = attrs.getAttributeIntValue(androidns,"defaultValue", 0);
    mMax = attrs.getAttributeIntValue(androidns,"max", 100);

  }
  @Override 
  protected View onCreateDialogView() {
    LinearLayout.LayoutParams params;
    LinearLayout layout = new LinearLayout(mContext);
    layout.setOrientation(LinearLayout.VERTICAL);
    layout.setPadding(6,6,6,6);

    mSplashText = new TextView(mContext);
    if (mDialogMessage != null)
      mSplashText.setText(mDialogMessage);
    layout.addView(mSplashText);

    mValueText = new TextView(mContext);
    mValueText.setGravity(Gravity.CENTER_HORIZONTAL);
    mValueText.setTextSize(32);
    params = new LinearLayout.LayoutParams(
        LinearLayout.LayoutParams.FILL_PARENT, 
        LinearLayout.LayoutParams.WRAP_CONTENT);
    layout.addView(mValueText, params);

    mSeekBar = new SeekBar(mContext);
    mSeekBar.setOnSeekBarChangeListener(this);
    layout.addView(mSeekBar, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));

    if (shouldPersist())
      mValue = getPersistedInt(mDefault);

    mSeekBar.setMax(mMax);
    mSeekBar.setProgress(mValue);
    return layout;
  }
  @Override 
  protected void onBindDialogView(View v) {
    super.onBindDialogView(v);
    mSeekBar.setMax(mMax);
    mSeekBar.setProgress(mValue);
  }
  @Override
  protected void onSetInitialValue(boolean restore, Object defaultValue)  
  {
    super.onSetInitialValue(restore, defaultValue);
    if (restore) 
      mValue = shouldPersist() ? getPersistedInt(mDefault) : 0;
    else 
      mValue = (Integer)defaultValue;
  }

  public void onProgressChanged(SeekBar seek, int value, boolean fromTouch)
  {
    String t = String.valueOf(value);
    mValueText.setText(mSuffix == null ? t : t.concat(mSuffix));
    if (shouldPersist())
      persistInt(value);
    callChangeListener(new Integer(value));
  }
  public void onStartTrackingTouch(SeekBar seek) {}
  public void onStopTrackingTouch(SeekBar seek) {}

  public void setMax(int max) { mMax = max; }
  public int getMax() { return mMax; }

  public void setProgress(int progress) { 
    mValue = progress;
    if (mSeekBar != null)
      mSeekBar.setProgress(progress); 
  }
  public int getProgress() { return mValue; }
}

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