ColorPickerPreference.java

/*******************************************************************************
 * Copyright 2013 Gabriele Mariotti
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package org.sugr.gearshift.ui.util.colorpicker;

import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.graphics.drawable.GradientDrawable;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;

import org.sugr.gearshift.R;
import org.sugr.gearshift.ui.util.Colorizer;

/**
 * ColorPreference based on ColorPickerDialog of Stock Calendar
 * 
 * @author Gabriele Mariotti (gabri.mariotti@gmail.com)
 *
 */
public class ColorPickerPreference extends Preference{
	
	private int[] mColorChoices = {};
    private int mValue = 0;
    private int mItemLayoutId = R.layout.calendar_grid_item_color;
    private int mNumColumns = 5;
    private View mPreviewView;

	public ColorPickerPreference(Context context) {
		super(context);
		initAttrs(null, 0);
	}
	
	public ColorPickerPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        initAttrs(attrs, 0);
    }

    public ColorPickerPreference(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initAttrs(attrs, defStyle);
    }
	
    private void initAttrs(AttributeSet attrs, int defStyle) {
    	TypedArray a = getContext().getTheme().obtainStyledAttributes(
                attrs, R.styleable.ColorPickerPreference, defStyle, defStyle);

        try {
            mItemLayoutId = a.getResourceId(R.styleable.ColorPickerPreference_cal_itemLayout, mItemLayoutId);
            mNumColumns = a.getInteger(R.styleable.ColorPickerPreference_cal_numColumns, mNumColumns);
            int choicesResId = a.getResourceId(R.styleable.ColorPickerPreference_cal_choices,
                    R.array.default_color_choice_values);
            if (choicesResId > 0) {
                mColorChoices = a.getResources().getIntArray(choicesResId);
            }

        } finally {
            a.recycle();
        }
        setWidgetLayoutResource(mItemLayoutId);
    }
    
    @Override
    protected void onBindView(View view) {
        super.onBindView(view);
        mPreviewView = view.findViewById(R.id.calendar_color_view);
        Colorizer.colorizeView((ImageView) mPreviewView, mValue, GradientDrawable.OVAL);
    }

    public void setValue(int value) {
        if (callChangeListener(value)) {
            mValue = value;
            persistInt(value);
            notifyChanged();
        }
    }

    @Override
    protected void onClick() {
        super.onClick();

        ColorPickerDialog colorPickerDialog = ColorPickerDialog.newInstance(R.string.color_picker_default_title,
				mColorChoices, getValue(), mNumColumns, isTablet(getContext())? ColorPickerDialog.SIZE_LARGE : ColorPickerDialog.SIZE_SMALL);
        
        //colorcalendar.setPreference(this);

        Activity activity = (Activity) getContext();
        activity.getFragmentManager().beginTransaction()
                .add(colorPickerDialog, getFragmentTag())
                .commit();
        
       colorPickerDialog.setOnColorSelectedListener(listener);
    }
    
    /**
     * Implement listener to get selected color value
     */
    ColorPickerSwatch.OnColorSelectedListener listener = new ColorPickerSwatch.OnColorSelectedListener() {
		
		@Override
		public void onColorSelected(int color) {
			setValue(color);
		}
	};
    
    @Override
    protected void onAttachedToActivity() {
        super.onAttachedToActivity();

        Activity activity = (Activity) getContext();
        ColorPickerDialog colorcalendar = (ColorPickerDialog) activity
                .getFragmentManager().findFragmentByTag(getFragmentTag());
        if (colorcalendar != null) {
            // re-bind listener to fragment
            colorcalendar.setOnColorSelectedListener(listener);
        }
    }

    @Override
    protected Object onGetDefaultValue(TypedArray a, int index) {
        return a.getInt(index, 0);
    }

    @Override
    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
        setValue(restoreValue ? getPersistedInt(0) : (Integer) defaultValue);
    }

    public String getFragmentTag() {
        return "color_" + getKey();
    }

    public int getValue() {
        return mValue;
    }
    
    public static boolean isTablet(Context context) {
        return (context.getResources().getConfiguration().screenLayout
                & Configuration.SCREENLAYOUT_SIZE_MASK)
                >= Configuration.SCREENLAYOUT_SIZE_LARGE;
    }

}