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 android.support.v7.widget; 18 19import android.graphics.Bitmap; 20import android.graphics.BitmapShader; 21import android.graphics.Shader; 22import android.graphics.drawable.AnimationDrawable; 23import android.graphics.drawable.BitmapDrawable; 24import android.graphics.drawable.ClipDrawable; 25import android.graphics.drawable.Drawable; 26import android.graphics.drawable.LayerDrawable; 27import android.graphics.drawable.ShapeDrawable; 28import android.graphics.drawable.shapes.RoundRectShape; 29import android.graphics.drawable.shapes.Shape; 30import android.support.v4.graphics.drawable.DrawableWrapper; 31import android.util.AttributeSet; 32import android.view.Gravity; 33import android.widget.ProgressBar; 34 35class AppCompatProgressBarHelper { 36 37 private static final int[] TINT_ATTRS = { 38 android.R.attr.indeterminateDrawable, 39 android.R.attr.progressDrawable 40 }; 41 42 private final ProgressBar mView; 43 44 private Bitmap mSampleTile; 45 46 AppCompatProgressBarHelper(ProgressBar view) { 47 mView = view; 48 } 49 50 void loadFromAttributes(AttributeSet attrs, int defStyleAttr) { 51 TintTypedArray a = TintTypedArray.obtainStyledAttributes(mView.getContext(), attrs, 52 TINT_ATTRS, defStyleAttr, 0); 53 54 Drawable drawable = a.getDrawableIfKnown(0); 55 if (drawable != null) { 56 mView.setIndeterminateDrawable(tileifyIndeterminate(drawable)); 57 } 58 59 drawable = a.getDrawableIfKnown(1); 60 if (drawable != null) { 61 mView.setProgressDrawable(tileify(drawable, false)); 62 } 63 64 a.recycle(); 65 } 66 67 /** 68 * Converts a drawable to a tiled version of itself. It will recursively 69 * traverse layer and state list drawables. 70 */ 71 private Drawable tileify(Drawable drawable, boolean clip) { 72 if (drawable instanceof DrawableWrapper) { 73 Drawable inner = ((DrawableWrapper) drawable).getWrappedDrawable(); 74 if (inner != null) { 75 inner = tileify(inner, clip); 76 ((DrawableWrapper) drawable).setWrappedDrawable(inner); 77 } 78 } else if (drawable instanceof LayerDrawable) { 79 LayerDrawable background = (LayerDrawable) drawable; 80 final int N = background.getNumberOfLayers(); 81 Drawable[] outDrawables = new Drawable[N]; 82 83 for (int i = 0; i < N; i++) { 84 int id = background.getId(i); 85 outDrawables[i] = tileify(background.getDrawable(i), 86 (id == android.R.id.progress || id == android.R.id.secondaryProgress)); 87 } 88 LayerDrawable newBg = new LayerDrawable(outDrawables); 89 90 for (int i = 0; i < N; i++) { 91 newBg.setId(i, background.getId(i)); 92 } 93 94 return newBg; 95 96 } else if (drawable instanceof BitmapDrawable) { 97 final BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable; 98 final Bitmap tileBitmap = bitmapDrawable.getBitmap(); 99 if (mSampleTile == null) { 100 mSampleTile = tileBitmap; 101 } 102 103 final ShapeDrawable shapeDrawable = new ShapeDrawable(getDrawableShape()); 104 final BitmapShader bitmapShader = new BitmapShader(tileBitmap, 105 Shader.TileMode.REPEAT, Shader.TileMode.CLAMP); 106 shapeDrawable.getPaint().setShader(bitmapShader); 107 shapeDrawable.getPaint().setColorFilter(bitmapDrawable.getPaint().getColorFilter()); 108 return (clip) ? new ClipDrawable(shapeDrawable, Gravity.LEFT, 109 ClipDrawable.HORIZONTAL) : shapeDrawable; 110 } 111 112 return drawable; 113 } 114 115 /** 116 * Convert a AnimationDrawable for use as a barberpole animation. 117 * Each frame of the animation is wrapped in a ClipDrawable and 118 * given a tiling BitmapShader. 119 */ 120 private Drawable tileifyIndeterminate(Drawable drawable) { 121 if (drawable instanceof AnimationDrawable) { 122 AnimationDrawable background = (AnimationDrawable) drawable; 123 final int N = background.getNumberOfFrames(); 124 AnimationDrawable newBg = new AnimationDrawable(); 125 newBg.setOneShot(background.isOneShot()); 126 127 for (int i = 0; i < N; i++) { 128 Drawable frame = tileify(background.getFrame(i), true); 129 frame.setLevel(10000); 130 newBg.addFrame(frame, background.getDuration(i)); 131 } 132 newBg.setLevel(10000); 133 drawable = newBg; 134 } 135 return drawable; 136 } 137 138 private Shape getDrawableShape() { 139 final float[] roundedCorners = new float[] { 5, 5, 5, 5, 5, 5, 5, 5 }; 140 return new RoundRectShape(roundedCorners, null, null); 141 } 142 143 Bitmap getSampleTime() { 144 return mSampleTile; 145 } 146 147} 148