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.Paint; 21 import android.graphics.Path; 22 import android.graphics.RectF; 23 24 /** 25 * Creates a rounded-corner rectangle. Optionally, an inset (rounded) rectangle 26 * can be included (to make a sort of "O" shape). 27 * The rounded rectangle can be drawn to a Canvas with its own draw() method, 28 * but more graphical control is available if you instead pass 29 * the RoundRectShape to a {@link android.graphics.drawable.ShapeDrawable}. 30 */ 31 public class RoundRectShape extends RectShape { 32 private float[] mOuterRadii; 33 private RectF mInset; 34 private float[] mInnerRadii; 35 36 private RectF mInnerRect; 37 private Path mPath; // this is what we actually draw 38 39 /** 40 * RoundRectShape constructor. 41 * Specifies an outer (round)rect and an optional inner (round)rect. 42 * 43 * @param outerRadii An array of 8 radius values, for the outer roundrect. 44 * The first two floats are for the 45 * top-left corner (remaining pairs correspond clockwise). 46 * For no rounded corners on the outer rectangle, 47 * pass null. 48 * @param inset A RectF that specifies the distance from the inner 49 * rect to each side of the outer rect. 50 * For no inner, pass null. 51 * @param innerRadii An array of 8 radius values, for the inner roundrect. 52 * The first two floats are for the 53 * top-left corner (remaining pairs correspond clockwise). 54 * For no rounded corners on the inner rectangle, 55 * pass null. 56 * If inset parameter is null, this parameter is ignored. 57 */ RoundRectShape(float[] outerRadii, RectF inset, float[] innerRadii)58 public RoundRectShape(float[] outerRadii, RectF inset, 59 float[] innerRadii) { 60 if (outerRadii != null && outerRadii.length < 8) { 61 throw new ArrayIndexOutOfBoundsException("outer radii must have >= 8 values"); 62 } 63 if (innerRadii != null && innerRadii.length < 8) { 64 throw new ArrayIndexOutOfBoundsException("inner radii must have >= 8 values"); 65 } 66 mOuterRadii = outerRadii; 67 mInset = inset; 68 mInnerRadii = innerRadii; 69 70 if (inset != null) { 71 mInnerRect = new RectF(); 72 } 73 mPath = new Path(); 74 } 75 76 @Override draw(Canvas canvas, Paint paint)77 public void draw(Canvas canvas, Paint paint) { 78 canvas.drawPath(mPath, paint); 79 } 80 81 @Override onResize(float w, float h)82 protected void onResize(float w, float h) { 83 super.onResize(w, h); 84 85 RectF r = rect(); 86 mPath.reset(); 87 88 if (mOuterRadii != null) { 89 mPath.addRoundRect(r, mOuterRadii, Path.Direction.CW); 90 } else { 91 mPath.addRect(r, Path.Direction.CW); 92 } 93 if (mInnerRect != null) { 94 mInnerRect.set(r.left + mInset.left, r.top + mInset.top, 95 r.right - mInset.right, r.bottom - mInset.bottom); 96 if (mInnerRect.width() < w && mInnerRect.height() < h) { 97 if (mInnerRadii != null) { 98 mPath.addRoundRect(mInnerRect, mInnerRadii, Path.Direction.CCW); 99 } else { 100 mPath.addRect(mInnerRect, Path.Direction.CCW); 101 } 102 } 103 } 104 } 105 106 @Override clone()107 public RoundRectShape clone() throws CloneNotSupportedException { 108 RoundRectShape shape = (RoundRectShape) super.clone(); 109 shape.mOuterRadii = mOuterRadii != null ? mOuterRadii.clone() : null; 110 shape.mInnerRadii = mInnerRadii != null ? mInnerRadii.clone() : null; 111 shape.mInset = new RectF(mInset); 112 shape.mInnerRect = new RectF(mInnerRect); 113 shape.mPath = new Path(mPath); 114 return shape; 115 } 116 } 117