VolumePreference.java

/*
    This file is part of Bodhi Timer.

    Bodhi Timer is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Bodhi Timer is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Bodhi Timer.  If not, see <http://www.gnu.org/licenses/>.
*/

package org.yuttadhammo.BodhiTimer;

import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;


public class VolumePreference extends DialogPreference implements SeekBar.OnSeekBarChangeListener, OnClickListener
{
    // ------------------------------------------------------------------------------------------
    // Private attributes :
    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;
    // ------------------------------------------------------------------------------------------

	private String TAG = "VolumePreference";



    // ------------------------------------------------------------------------------------------
    // Constructor :
    public VolumePreference(Context context, AttributeSet attrs) {

        super(context,attrs); 
        mContext = context;

        // Get string value for dialogMessage :
        int mDialogMessageId = attrs.getAttributeResourceValue(androidns, "dialogMessage", 0);
        if(mDialogMessageId == 0) mDialogMessage = attrs.getAttributeValue(androidns, "dialogMessage");
        else mDialogMessage = mContext.getString(mDialogMessageId);

        // Get string value for suffix (text attribute in xml file) :
        mSuffix = "%";

        // Get default and max seekbar values :
        mDefault = 100;
        mMax = attrs.getAttributeIntValue(androidns, "max", 100);
    }
    // ------------------------------------------------------------------------------------------



    // ------------------------------------------------------------------------------------------
    // DialogPreference methods :
    @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;
    }
    // ------------------------------------------------------------------------------------------



    // ------------------------------------------------------------------------------------------
    // OnSeekBarChangeListener methods :
    @Override
    public void onProgressChanged(SeekBar seek, int value, boolean fromTouch)
    {
        String t = String.valueOf(value);
        mValueText.setText(mSuffix == null ? t : t.concat(" " + mSuffix));
    }

    @Override
    public void onStartTrackingTouch(SeekBar seek) {}
    @Override
    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; }
    // ------------------------------------------------------------------------------------------



    // ------------------------------------------------------------------------------------------
    // Set the positive button listener and onClick action : 
    @Override
    public void showDialog(Bundle state) {

        super.showDialog(state);

        Button positiveButton = ((AlertDialog) getDialog()).getButton(AlertDialog.BUTTON_POSITIVE);
        positiveButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {

        if (shouldPersist())
            persistInt(mSeekBar.getProgress());
        callChangeListener(Integer.valueOf(mSeekBar.getProgress()));

        Log.v(TAG,"Volume: "+Integer.valueOf(mSeekBar.getProgress()));
        
        ((AlertDialog) getDialog()).dismiss();
    }
    // ------------------------------------------------------------------------------------------
}