SeekBarPreference.java

/** 
 ** Copyright (c) 2011 Ushahidi Inc
 ** All rights reserved
 ** Contact: team@ushahidi.com
 ** Website: http://www.ushahidi.com
 ** 
 ** GNU Lesser General Public License Usage
 ** This file may be used under the terms of the GNU Lesser
 ** General Public License version 3 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file. Please review the following information to
 ** ensure the GNU Lesser General Public License version 3 requirements
 ** will be met: http://www.gnu.org/licenses/lgpl.html.	
 **	
 **
 ** If you have questions regarding the use of this file, please contact
 ** Ushahidi developers at team@ushahidi.com.
 ** 
 **/

package com.ushahidi.android.app.ui;

import android.content.Context;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.util.Log;
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 mMax = 0;

    private int mValue = 0;

    private int mDefault = 0;

    private int mMin = 200;
    
    private static final String CLASS_TAG = SeekBarPreference.class.getCanonicalName();

    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", mMin);
        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);
        if (mValue < mMin)
            mSeekBar.setProgress(mMin);
        else
            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) : mMin;
        else
            mValue = ((Integer)defaultValue > mMin) ? (Integer)defaultValue : mMin;
    }

    public void onProgressChanged(SeekBar seek, int value, boolean fromTouch) {
        String t = "";
        if (value < mMin) {
            t = String.valueOf(mMin);
        } else {
            t = String.valueOf(value);
        }
        
        Log.i(CLASS_TAG, "SeekBar current value: "+value);
        
        mValueText.setText(mSuffix == null ? t : t.concat(mSuffix));
        if (shouldPersist()) {
            Log.i(CLASS_TAG, "SeekBar is persisting "+value);
            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;
    }
}