1 /* 2 * Copyright (C) 2007 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 17 package android.graphics.drawable.shapes; 18 19 import android.graphics.Canvas; 20 import android.graphics.Outline; 21 import android.graphics.Paint; 22 23 import java.util.Objects; 24 25 /** 26 * Creates an arc shape. The arc shape starts at a specified angle and sweeps 27 * clockwise, drawing slices of pie. 28 * <p> 29 * The arc can be drawn to a {@link Canvas} with its own 30 * {@link #draw(Canvas, Paint)} method, but more graphical control is available 31 * if you instead pass the ArcShape to a 32 * {@link android.graphics.drawable.ShapeDrawable}. 33 */ 34 public class ArcShape extends RectShape { 35 private final float mStartAngle; 36 private final float mSweepAngle; 37 38 /** 39 * ArcShape constructor. 40 * 41 * @param startAngle the angle (in degrees) where the arc begins 42 * @param sweepAngle the sweep angle (in degrees). Anything equal to or 43 * greater than 360 results in a complete circle/oval. 44 */ ArcShape(float startAngle, float sweepAngle)45 public ArcShape(float startAngle, float sweepAngle) { 46 mStartAngle = startAngle; 47 mSweepAngle = sweepAngle; 48 } 49 50 /** 51 * @return the angle (in degrees) where the arc begins 52 */ getStartAngle()53 public final float getStartAngle() { 54 return mStartAngle; 55 } 56 57 /** 58 * @return the sweep angle (in degrees) 59 */ getSweepAngle()60 public final float getSweepAngle() { 61 return mSweepAngle; 62 } 63 64 @Override draw(Canvas canvas, Paint paint)65 public void draw(Canvas canvas, Paint paint) { 66 canvas.drawArc(rect(), mStartAngle, mSweepAngle, true, paint); 67 } 68 69 @Override getOutline(Outline outline)70 public void getOutline(Outline outline) { 71 // Since we don't support concave outlines, arc shape does not attempt 72 // to provide an outline. 73 } 74 75 @Override clone()76 public ArcShape clone() throws CloneNotSupportedException { 77 return (ArcShape) super.clone(); 78 } 79 80 @Override equals(Object o)81 public boolean equals(Object o) { 82 if (this == o) { 83 return true; 84 } 85 if (o == null || getClass() != o.getClass()) { 86 return false; 87 } 88 if (!super.equals(o)) { 89 return false; 90 } 91 ArcShape arcShape = (ArcShape) o; 92 return Float.compare(arcShape.mStartAngle, mStartAngle) == 0 93 && Float.compare(arcShape.mSweepAngle, mSweepAngle) == 0; 94 } 95 96 @Override hashCode()97 public int hashCode() { 98 return Objects.hash(super.hashCode(), mStartAngle, mSweepAngle); 99 } 100 } 101 102