1/* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package rs.example.android.com.healingbrush; 18 19import android.content.Context; 20import android.graphics.Bitmap; 21import android.graphics.Canvas; 22import android.graphics.Color; 23import android.graphics.Matrix; 24import android.graphics.Paint; 25import android.graphics.Path; 26import android.graphics.RectF; 27import android.graphics.drawable.Drawable; 28import android.util.AttributeSet; 29import android.view.View; 30import android.widget.ImageView; 31 32import java.util.ArrayList; 33import java.util.Arrays; 34 35public class DrawView extends View { 36 private static final String TAG = "DrawView"; 37 private ImageView mImageView; 38 Path mPoints_backup = new Path(); 39 float[] path = new float[200]; 40 Path mPoints = new Path(); 41 int len; 42 Paint mPaint1; 43 Paint mPaint2; 44 private boolean mDone; 45 ArrayList<Drawable> drawList = new ArrayList<Drawable>(); 46 47 private void setup(Context context) { 48 mPaint1 = new Paint(); 49 mPaint2 = new Paint(); 50 mPaint1.setStyle(Paint.Style.STROKE); 51 mPaint1.setColor(Color.BLACK); 52 mPaint1.setStrokeWidth(2); 53 mPaint2.setStyle(Paint.Style.STROKE); 54 mPaint2.setColor(Color.YELLOW); 55 } 56 57 public DrawView(Context context) { 58 super(context); 59 setup(context); 60 } 61 62 public DrawView(Context context, AttributeSet attrs) { 63 super(context, attrs); 64 setup(context); 65 } 66 67 public DrawView(Context context, AttributeSet attrs, int defStyleAttr) { 68 super(context, attrs, defStyleAttr); 69 setup(context); 70 } 71 72 /** 73 * Assumes imageView is using matrix mode 74 * 75 * @param imageView 76 */ 77 public void setImageView(ImageView imageView) { 78 mImageView = imageView; 79 } 80 81 RectF rec = new RectF(); 82 83 @Override 84 protected void onDraw(Canvas canvas) { 85 Matrix m = mImageView.getImageMatrix(); 86 Drawable d = mImageView.getDrawable(); 87 canvas.concat(m); 88 89 for (Drawable elem : drawList) { 90 elem.draw(canvas); 91 } 92 canvas.drawPath(mPoints, mPaint1); 93 canvas.drawPath(mPoints, mPaint2); 94 } 95 96 public Region getRegion(Bitmap img) { 97 Region ret = new Region(Arrays.copyOf(path, len), img); 98 99 invalidate(); 100 return ret; 101 } 102 103 public void downPoint(float[] imgPoint) { 104 path[0] = imgPoint[0]; 105 path[1] = imgPoint[1]; 106 len = 2; 107 mPoints_backup.reset(); 108 mPoints_backup.addPath(mPoints); 109 mPoints.reset(); 110 mPoints.moveTo(imgPoint[0], imgPoint[1]); 111 } 112 113 public void undo() { 114 mPoints.reset(); 115 mPoints.addPath(mPoints_backup); 116 } 117 118 public void movePoint(float[] imgMoveList, int size) { 119 if (len + size * 2 >= path.length) { 120 path = Arrays.copyOf(path, 2 * (len + size * 2)); 121 } 122 for (int i = size * 2 - 2; i >= 0; i -= 2) { 123 mPoints.lineTo(imgMoveList[i], imgMoveList[i + 1]); 124 path[len] = imgMoveList[i]; 125 path[len + 1] = imgMoveList[i + 1]; 126 len += 2; 127 } 128 } 129 130 public void upPoint(float[] imgPoint) { 131 if (len + 2 >= path.length) { 132 path = Arrays.copyOf(path, 2 * (len + 2)); 133 } 134 path[len] = imgPoint[0]; 135 path[len + 1] = imgPoint[1]; 136 len += 2; 137 mPoints.lineTo(imgPoint[0], imgPoint[1]); 138 mPoints.close(); 139 mDone = true; 140 } 141 142 public void addDrawable(Drawable d) { 143 drawList.add(d); 144 } 145 146 public void clearDrawables() { 147 drawList.clear(); 148 } 149} 150