Android Open Source - ColorWallpaper Continuous Value Preference

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License

The source code is released under:

Licensed under the Expat License. Copyright (C) 2013 Peter Occil Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the...

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Java Source Code

package com.upokecenter.android.ui;
/*ww w .j a va  2s  . com*/
import android.app.Dialog;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

import com.upokecenter.android.util.AppManager;


public class ContinuousValuePreference extends AlertDialogPreference {

  int minValue,maxValue;
  String label;
  int seekBarID,textViewID;
  IDialogUpdater updater = null;

  public ContinuousValuePreference(Context context, AttributeSet attrs) {
    super(context, attrs);
    AppManager.initialize(context);
    TypedArray t=context.getTheme().obtainStyledAttributes(attrs,
        AppManager.getStyleableResourceGroup("ContinuousValuePreference"),0,0);
    try {
      int minval=t.getInt(AppManager.getStyleableResource("ContinuousValuePreference_minValue"),0);
      int maxval=t.getInt(AppManager.getStyleableResource("ContinuousValuePreference_maxValue"),0);
      minValue=Math.min(minval,maxval);
      maxValue=Math.max(minval,maxval);
      seekBarID=AppManager.getIdResource("seekBar1");
      textViewID=AppManager.getIdResource("textView1");
      label=t.getString(AppManager.getStyleableResource("ContinuousValuePreference_label"));
      //DebugUtility.log("values=%d %d [%s]",minValue,maxValue,label);
      if(label==null) {
        label="%d";
      }
    } finally {
      t.recycle();
    }
  }

  private int valueToProgress(int value){
    float valueAsProgress=(maxValue==minValue) ? 0 : ((value)-minValue)*1.0f/(maxValue-minValue);
    //DebugUtility.log("valueToProgress %d->%d",value,Math.round(valueAsProgress*10000f));
    if(valueAsProgress<0)return 0;
    if(valueAsProgress>1)return 10000;
    return (int)(valueAsProgress*10000f);
  }

  private int progressToValue(int progress){
    int ret=minValue+Math.round((maxValue-minValue)*(progress/10000f));
    //DebugUtility.log("progressToValue %d->%d",progress,ret);
    if(progress<0)return minValue;
    if(progress>10000)return maxValue;
    return ret;
  }


  @Override
  protected IDialogUpdater getDialogUpdater() {
    if(updater==null) {
      updater=new IDialogUpdater(){
        @Override
        public void setValue(Dialog dialog, Object value) {
          if(dialog==null)return;
          SeekBar seekBar=(SeekBar)dialog.findViewById(seekBarID);
          if(seekBar==null)return;
          seekBar.setProgress(valueToProgress((Integer)value));
        }

        @Override
        public Object getValue(Dialog dialog) {
          if(dialog==null)return 0;
          SeekBar seekBar=(SeekBar)dialog.findViewById(seekBarID);
          if(seekBar==null)return 0;
          return progressToValue(seekBar.getProgress());
        }


        @Override
        public void prepareDialog(Dialog dialog) {
          if(dialog==null)return;
          final Dialog d=dialog;
          SeekBar seekBar=(SeekBar)dialog.findViewById(seekBarID);
          if(seekBar==null)return;
          TextView text=(TextView)d.findViewById(textViewID);
          if(text==null)return;
          seekBar.setMax(10000);
          text.setText(String.format(label,progressToValue(seekBar.getProgress())));
          seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener(){
            @Override
            public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
              TextView text=(TextView)d.findViewById(textViewID);
              text.setText(String.format(label,progressToValue(arg0.getProgress())));
            }

            @Override public void onStartTrackingTouch(SeekBar seekBar) {}
            @Override public void onStopTrackingTouch(SeekBar seekBar) {}
          });
        }

        @Override
        public Class<?> getType() {
          return Integer.TYPE;
        }

        @Override
        public boolean isValid(Object[] value) {
          return ((Integer)value[0]>=minValue && (Integer)value[0]<=maxValue);
        }
      };
    }
    return updater;
  }

}

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