ColorPickerDialogPreference.java

/**
 * technoXist
 *
 * Copyright (c) 2014 Suyash Bhatt
 * 
 * Copyright (c) 2012-2013 Frederic Julian
 *
 *     This program 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.
 *
 *     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, see <http://www.gnu.org/licenses/>.
 *
 *
 * Some parts of this software are based on "Sparse rss" under the MIT license (see
 * below). Please refers to the original project to identify which parts are under the
 * MIT license.
 *
 * Copyright (c) 2010-2012 Stefan Handschuh
 *
 *     Permission is hereby granted, free of charge, to any person obtaining a copy
 *     of this software and associated documentation files (the "Software"), to deal
 *     in the Software without restriction, including without limitation the rights
 *     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *     copies of the Software, and to permit persons to whom the Software is
 *     furnished to do so, subject to the following conditions:
 *
 *     The above copyright notice and this permission notice shall be included in
 *     all copies or substantial portions of the Software.
 *
 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *     AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *     THE SOFTWARE.
 */

package com.technoxist.widget;

import android.content.Context;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

import com.technoxist.R;

public class ColorPickerDialogPreference extends DialogPreference {

    private SeekBar redSeekBar;
    private SeekBar greenSeekBar;
    private SeekBar blueSeekBar;
    private SeekBar transparencySeekBar;

    private int color;

    public ColorPickerDialogPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        color = WidgetProvider.STANDARD_BACKGROUND;
    }

    @Override
    protected View onCreateDialogView() {
        final View view = super.onCreateDialogView();

        view.setBackgroundColor(color);

        redSeekBar = (SeekBar) view.findViewById(R.id.seekbar_red);
        greenSeekBar = (SeekBar) view.findViewById(R.id.seekbar_green);
        blueSeekBar = (SeekBar) view.findViewById(R.id.seekbar_blue);
        transparencySeekBar = (SeekBar) view.findViewById(R.id.seekbar_transparency);

        int _color = color;

        transparencySeekBar.setProgress(((_color / 0x01000000) * 100) / 255);
        _color %= 0x01000000;
        redSeekBar.setProgress(((_color / 0x00010000) * 100) / 255);
        _color %= 0x00010000;
        greenSeekBar.setProgress(((_color / 0x00000100) * 100) / 255);
        _color %= 0x00000100;
        blueSeekBar.setProgress((_color * 100) / 255);

        OnSeekBarChangeListener onSeekBarChangeListener = new OnSeekBarChangeListener() {

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                int red = (redSeekBar.getProgress() * 255) / 100;

                int green = (greenSeekBar.getProgress() * 255) / 100;

                int blue = (blueSeekBar.getProgress() * 255) / 100;

                int transparency = (transparencySeekBar.getProgress() * 255) / 100;

                color = transparency * 0x01000000 + red * 0x00010000 + green * 0x00000100 + blue;
                view.setBackgroundColor(color);
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        };

        redSeekBar.setOnSeekBarChangeListener(onSeekBarChangeListener);
        greenSeekBar.setOnSeekBarChangeListener(onSeekBarChangeListener);
        blueSeekBar.setOnSeekBarChangeListener(onSeekBarChangeListener);
        transparencySeekBar.setOnSeekBarChangeListener(onSeekBarChangeListener);
        return view;
    }

    @Override
    protected void onDialogClosed(boolean positiveResult) {
        if (positiveResult) {
            persistInt(color);
        }
        super.onDialogClosed(positiveResult);
    }

}