package com.yjkj.sandihuabing.view.widget;import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;import com.yjkj.sandihuabing.model.Coord;
import com.yjkj.sandihuabing.util.Util;import java.io.File;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;/*** Created by yunjia on 2016/11/4.*/public class TuyaView extends View{private Context context;private Bitmap mBitmap;private Canvas mCanvas;private Path mPath;private Paint mBitmapPaint;// 画布的画笔private Paint mPaint;// 真实的画笔private float mX, mY;// 临时点坐标private static final float TOUCH_TOLERANCE = 4;// 保存Path路径的集合private static List<DrawPath> savePath;// 保存已删除Path路径的集合private static List<DrawPath> deletePath;// 记录Path路径的坐标点private List<Coord> coordList;private List<List<Coord>> list;private List<Coord> coords;private DrawPath dp;private int screenWidth, screenHeight;private int currentColor = Color.BLACK;private int currentSize = 10;private class DrawPath {public Path path;// 路径public Paint paint;// 画笔}public TuyaView(Context context, int w, int h) {super(context);this.context = context;screenWidth = w;screenHeight = h;setLayerType(LAYER_TYPE_SOFTWARE,null);//设置默认样式，去除dis-in的黑色方框以及clear模式的黑线效果initCanvas();savePath = new ArrayList<DrawPath>();deletePath = new ArrayList<DrawPath>();coordList = new ArrayList<>();coords = new ArrayList<>();list = new ArrayList<>();}public void initCanvas() {setPaintStyle();mBitmapPaint = new Paint(Paint.DITHER_FLAG);//画布大小mBitmap = Bitmap.createBitmap(screenWidth, screenHeight, Bitmap.Config.ARGB_8888);mBitmap.eraseColor(Color.argb(0, 0, 0, 0));mCanvas = new Canvas(mBitmap);  //所有mCanvas画的东西都被保存在了mBitmap中mCanvas.drawColor(Color.TRANSPARENT);}//初始化画笔样式private void setPaintStyle() {mPaint = new Paint();mPaint.setStyle(Paint.Style.STROKE);mPaint.setStrokeJoin(Paint.Join.ROUND);// 设置外边缘mPaint.setStrokeCap(Paint.Cap.ROUND);// 形状mPaint.setAntiAlias(true);mPaint.setDither(true);}@Overridepublic void onDraw(Canvas canvas) {//canvas.drawColor(0xFFAAAAAA);// 将前面已经画过得显示出来canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);if (mPath != null) {// 实时的显示canvas.drawPath(mPath, mPaint);}}private void touch_start(float x, float y) {mPath.moveTo(x, y);mX = x;mY = y;}private void touch_move(float x, float y) {float dx = Math.abs(x - mX);float dy = Math.abs(mY - y);if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {// 从x1,y1到x2,y2画一条贝塞尔曲线，更平滑(直接用mPath.lineTo也可以)mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);//mPath.lineTo(mX,mY);mX = x;mY = y;if(mPaint.getColor() == Color.BLACK && mPaint.getStrokeWidth() == currentSize){
//                coords.add(new Coord(Util.format(x/screenWidth),Util.format(y/screenHeight)));coordList.add(new Coord(Util.format(x/screenWidth),Util.format(y/screenHeight)));}if(mPaint.getColor() == Color.TRANSPARENT && mPaint.getStrokeWidth() == 80){coords.add(new Coord(Util.format(x/screenWidth),Util.format(y/screenHeight)));}}}private void touch_up() {mPath.lineTo(mX, mY);mCanvas.drawPath(mPath, mPaint);//将一条完整的路径保存下来savePath.add(dp);mPath = null;// 重新置空if(coordList.size() > 0){list.add(coordList);coordList = new ArrayList<>();}
//        if(coords.size() > 0 && list.size() > 0){
//            for(int i = 0;i < list.size();i++){
//                List<Coord> list1 = list.get(i);
//                for(int j= 0; j < list1.size();j++){
//                    for(int q = 0;q < coords.size();q++){
//                        if(list1.contains(coords.get(q))){
//                            list1.remove(j);
//                            q--;
//                        }
//                    }
//
//
//                }
//            }
//            coords = new ArrayList<>();
//        }}/*** 画图*/public void brush(){setPaintStyle();mPaint.setColor(currentColor);mPaint.setStrokeWidth(currentSize);}/*** 橡皮*/public void eraser(){setPaintStyle();mPaint.setAlpha(0);mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));mPaint.setColor(Color.TRANSPARENT);mPaint.setStrokeWidth(80);}/*** 撤销* 撤销的核心思想就是将画布清空，* 将保存下来的Path路径最后一个移除掉，* 重新将路径画在画布上面。*/public void undo() {if (savePath != null && savePath.size() > 0) {DrawPath drawPath = savePath.get(savePath.size() - 1);deletePath.add(drawPath);savePath.remove(savePath.size() - 1);redrawOnBitmap();}}/*** 重做*/public void redo() {if (savePath != null && savePath.size() > 0) {savePath.clear();redrawOnBitmap();}list.clear();coords.clear();coordList.clear();}private void redrawOnBitmap() {/*mBitmap = Bitmap.createBitmap(screenWidth, screenHeight,Bitmap.Config.RGB_565);mCanvas.setBitmap(mBitmap);// 重新设置画布，相当于清空画布*/initCanvas();Iterator<DrawPath> iter = savePath.iterator();while (iter.hasNext()) {DrawPath drawPath = iter.next();mCanvas.drawPath(drawPath.path, drawPath.paint);}invalidate();// 刷新}/*** 恢复，恢复的核心就是将删除的那条路径重新添加到savapath中重新绘画即可*/public void recover() {if (deletePath.size() > 0) {//将删除的路径列表中的最后一个，也就是最顶端路径取出（栈）,并加入路径保存列表中DrawPath dp = deletePath.get(deletePath.size() - 1);savePath.add(dp);//将取出的路径重绘在画布上mCanvas.drawPath(dp.path, dp.paint);//将该路径从删除的路径列表中去除deletePath.remove(deletePath.size() - 1);invalidate();}}@Overridepublic boolean onTouchEvent(MotionEvent event) {float x = event.getX();float y = event.getY();switch (event.getAction()) {case MotionEvent.ACTION_DOWN:// 每次down下去重新new一个PathmPath = new Path();//每一次记录的路径对象是不一样的dp = new DrawPath();dp.path = mPath;dp.paint = mPaint;touch_start(x, y);invalidate();break;case MotionEvent.ACTION_MOVE:touch_move(x, y);invalidate();break;case MotionEvent.ACTION_UP:touch_up();invalidate();break;}return true;}//保存到sd卡public void saveToSDCard() {//获得系统当前时间，并以该时间作为文件名SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");Date curDate = new Date(System.currentTimeMillis());//获取当前时间String str = formatter.format(curDate) + "paint.png";File file = new File("sdcard/" + str);FileOutputStream fos = null;try {fos = new FileOutputStream(file);} catch (Exception e) {e.printStackTrace();}mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);//发送Sd卡的就绪广播,要不然在手机图库中不存在Intent intent = new Intent(Intent.ACTION_MEDIA_MOUNTED);intent.setData(Uri.fromFile(Environment.getExternalStorageDirectory()));context.sendBroadcast(intent);Log.e("TAG", "图片已保存");}//选择画笔大小public void selectPaintSize(int which) {//int size = Integer.parseInt(this.getResources().getStringArray(R.array.paintsize)[which]);currentSize = which;setPaintStyle();}public Bitmap getmBitmap(){return mBitmap;}public List<DrawPath> getSavePath(){return savePath;}public List<Coord> getCoordList(){return coordList;}public List<List<Coord>> getList(){return list;}
}