ColorDrawable.java revision c2974809373697147cbe5754835cc871fb93aef1
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.graphics.drawable; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.*; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.Resources; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.xmlpull.v1.XmlPullParser; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.xmlpull.v1.XmlPullParserException; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.IOException; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A specialized Drawable that fills the Canvas with a specified color, 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * with respect to the clip region. Note that a ColorDrawable ignores the ColorFilter. 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * It also ignores the Bounds, meaning it will draw everywhere in the current clip, 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * even if setBounds(...) was called with a smaller area. 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>It can be defined in an XML file with the <code><color></code> element.</p> 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ColorDrawable_color 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ColorDrawable extends Drawable { 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ColorState mState; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new black ColorDrawable. 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ColorDrawable() { 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(null); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new ColorDrawable with the specified color. 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param color The color to draw. 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ColorDrawable(int color) { 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(null); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState.mBaseColor = mState.mUseColor = color; 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ColorDrawable(ColorState state) { 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState = new ColorState(state); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getChangingConfigurations() { 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.getChangingConfigurations() | mState.mChangingConfigurations; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void draw(Canvas canvas) { 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project canvas.drawColor(mState.mUseColor); 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the alpha value of this drawable's color. 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return A value between 0 and 255. 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getAlpha() { 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mState.mUseColor >>> 24; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the color's alpha value. 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param alpha The alpha value to set, between 0 and 255. 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setAlpha(int alpha) { 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project alpha += alpha >> 7; // make it 0..256 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int baseAlpha = mState.mBaseColor >>> 24; 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int useAlpha = baseAlpha * alpha >> 8; 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState.mUseColor = (mState.mBaseColor << 8 >>> 8) | (useAlpha << 24); 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Setting a color filter on a ColorDrawable has no effect. 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param colorFilter Ignore. 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setColorFilter(ColorFilter colorFilter) { 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getOpacity() { 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mState.mUseColor >>> 24) { 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case 255: 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return PixelFormat.OPAQUE; 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case 0: 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return PixelFormat.TRANSPARENT; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return PixelFormat.TRANSLUCENT; 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs) 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws XmlPullParserException, IOException { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.inflate(r, parser, attrs); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = r.obtainAttributes(attrs, com.android.internal.R.styleable.ColorDrawable); 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int color = mState.mBaseColor; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project color = a.getColor(com.android.internal.R.styleable.ColorDrawable_color, color); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState.mBaseColor = mState.mUseColor = color; 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ConstantState getConstantState() { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState.mChangingConfigurations = super.getChangingConfigurations(); 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mState; 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final static class ColorState extends ConstantState { 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mBaseColor; // initial color. never changes 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mUseColor; // basecolor modulated by setAlpha() 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mChangingConfigurations; 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ColorState(ColorState state) { 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (state != null) { 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBaseColor = state.mBaseColor; 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mUseColor = state.mUseColor; 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Drawable newDrawable() { 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new ColorDrawable(this); 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 149c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn public Drawable newDrawable(Resources res) { 150c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn return new ColorDrawable(this); 151c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn } 152c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn 153c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn @Override 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getChangingConfigurations() { 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mChangingConfigurations; 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 159