SeekBarPreference.java

/*
 * Copyright (C) 2013 The CyanogenMod Project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 3 as published by the Free Software Foundation.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */

package net.cactii.flash2;

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 SeekBar mSeekBar;
    private TextView mSplashText, mValueText;
    private final String mDialogMessage, mSuffix;
    private int mDefault, mMax, mValue = 0;

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

        mDialogMessage = context.getString(R.string.setting_frequency_dialog);
        mSuffix = context.getString(R.string.setting_frequency_hz);
        //has min value of 1hz but displays 0hz
        mDefault = 4;
        mMax = 24;
    }

    @Override
    protected View onCreateDialogView() {
        final Context context = getContext();
        LinearLayout.LayoutParams params;
        LinearLayout layout = new LinearLayout(context);
        layout.setOrientation(LinearLayout.VERTICAL);
        layout.setPadding(6, 6, 6, 6);

        mSplashText = new TextView(context);
        if (mDialogMessage != null) {
            mSplashText.setText(mDialogMessage);
        }
        layout.addView(mSplashText);

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

        mSeekBar = new SeekBar(context);
        mSeekBar.setOnSeekBarChangeListener(this);
        layout.addView(mSeekBar, new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_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;
        }
    }

    @Override
    public void onProgressChanged(SeekBar seek, int value, boolean fromTouch) {
        String t = String.valueOf(value + 1);
        mValueText.setText(mSuffix == null ? t : t.concat(mSuffix));
        if (shouldPersist()) {
            persistInt(value);
        }
        callChangeListener(value);
    }

    @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;
    }
}