Android Open Source - android_wallpaper_flier Flier Brightness Preference

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License

The source code is released under:

Apache License

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Java Source Code

/*
   Copyright 2012 Harri Smatt/*ww  w.  ja va2s  .c om*/

   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.
 */

package fi.harism.wallpaper.flier.prefs;

import android.content.Context;
import android.content.res.TypedArray;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.SeekBar;
import fi.harism.wallpaper.flier.R;

/**
 * Brightness dialog preference. Stored value is an integer between [VALUE_MIN,
 * VALUE_MAX]. Once used in renderer this value is divided by 100 making it a
 * brightness percentage.
 */
public final class FlierBrightnessPreference extends DialogPreference {

  // Maximum brightness value.
  private static final int VALUE_MAX = 100;
  // Minimum brightness value.
  private static final int VALUE_MIN = 0;

  // SeekBar shown in dialog.
  private SeekBar mSeekBar;
  // Current value.
  private int mValue;

  /**
   * Default constructor.
   */
  public FlierBrightnessPreference(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  @Override
  protected void onBindDialogView(View view) {
    super.onBindDialogView(view);
    // Adjust SeekBar range to [0, VALUE_MAX - VALUE_MIN].
    mSeekBar.setMax(VALUE_MAX - VALUE_MIN);
    mSeekBar.setProgress(mValue - VALUE_MIN);
  }

  @Override
  protected View onCreateDialogView() {
    mSeekBar = (SeekBar) LayoutInflater.from(getContext()).inflate(
        R.layout.preference_brightness, null);
    return mSeekBar;
  }

  @Override
  protected void onDialogClosed(boolean positiveResult) {
    if (positiveResult) {
      int value = mSeekBar.getProgress() + VALUE_MIN;
      if (callChangeListener(value)) {
        mValue = value;
        persistInt(mValue);
      }
    }
  }

  @Override
  protected Object onGetDefaultValue(TypedArray ta, int index) {
    return ta.getInt(index, 0);
  }

  @Override
  protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
    mValue = restoreValue ? getPersistedInt(mValue)
        : (Integer) defaultValue;
    if (!restoreValue) {
      persistInt(mValue);
    }
  }

}

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