/*
 * Copyright 2013, Edmodo, Inc. 
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with the License.
 * You may obtain a copy of the License in the LICENSE file, or 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 com.dyh.rnpicture.widget.crop;

import android.content.Context;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.TypedValue;

/**
 * Utility class for handling all of the Paint used to draw the CropOverlayView.
 */
public class PaintUtil
{

	// Private Constants ///////////////////////////////////////////////////////

	private static final int DEFAULT_CORNER_COLOR = Color.WHITE;
	private static final String SEMI_TRANSPARENT = "#AAFFFFFF";
	private static final String DEFAULT_BACKGROUND_COLOR_ID = "#B0000000";
	private static final float DEFAULT_LINE_THICKNESS_DP = 3;
	private static final float DEFAULT_CORNER_THICKNESS_DP = 5;
	private static final float DEFAULT_GUIDELINE_THICKNESS_PX = 1;

	// Public Methods //////////////////////////////////////////////////////////

	/**
	 * Creates the Paint object for drawing the crop window border.
	 * 
	 * @param context
	 *            the Context
	 * @return new Paint object
	 */
	public static Paint newBorderPaint(Context context)
	{

		// Set the line thickness for the crop window border.
		final float lineThicknessPx = TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_DIP, DEFAULT_LINE_THICKNESS_DP, context
						.getResources().getDisplayMetrics());

		final Paint borderPaint = new Paint();
		borderPaint.setColor(Color.parseColor(SEMI_TRANSPARENT));
		borderPaint.setStrokeWidth(lineThicknessPx);
		borderPaint.setStyle(Paint.Style.STROKE);

		return borderPaint;
	}

	/**
	 * Creates the Paint object for drawing the crop window guidelines.
	 * 
	 * @return the new Paint object
	 */
	public static Paint newGuidelinePaint()
	{

		final Paint paint = new Paint();
		paint.setColor(Color.parseColor(SEMI_TRANSPARENT));
		paint.setStrokeWidth(DEFAULT_GUIDELINE_THICKNESS_PX);

		return paint;
	}

	/**
	 * Creates the Paint object for drawing the translucent overlay outside the
	 * crop window.
	 * 
	 * @param context
	 *            the Context
	 * @return the new Paint object
	 */
	public static Paint newBackgroundPaint(Context context)
	{

		final Paint paint = new Paint();
		paint.setColor(Color.parseColor(DEFAULT_BACKGROUND_COLOR_ID));

		return paint;
	}

	/**
	 * Creates the Paint object for drawing the corners of the border 剪切框四角
	 * 
	 * @param context
	 *            the Context
	 * @return the new Paint object
	 */
	public static Paint newCornerPaint(Context context)
	{

		// Set the line thickness for the crop window border.
		final float lineThicknessPx = TypedValue.applyDimension(
				TypedValue.COMPLEX_UNIT_DIP, DEFAULT_CORNER_THICKNESS_DP,
				context.getResources().getDisplayMetrics());

		final Paint cornerPaint = new Paint();
		cornerPaint.setColor(DEFAULT_CORNER_COLOR);
		cornerPaint.setStrokeWidth(lineThicknessPx);
		cornerPaint.setStyle(Paint.Style.STROKE);

		return cornerPaint;
	}

	/**
	 * Returns the value of the corner thickness
	 * 
	 * @return Float equivalent to the corner thickness
	 */
	public static float getCornerThickness()
	{
		return DEFAULT_CORNER_THICKNESS_DP;
	}

	/**
	 * Returns the value of the line thickness of the border
	 * 
	 * @return Float equivalent to the line thickness
	 */
	public static float getLineThickness()
	{
		return DEFAULT_LINE_THICKNESS_DP;
	}

}