ColorDrawable.java revision 41bff38d3060dbcb55133cedaf5d962c3082efc2
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/** 2995930e13faac8c17dabfaa1478089baa772f091bRomain Guy * A specialized Drawable that fills the Canvas with a specified color. 3095930e13faac8c17dabfaa1478089baa772f091bRomain Guy * Note that a ColorDrawable ignores the ColorFilter. 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>It can be defined in an XML file with the <code><color></code> element.</p> 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @attr ref android.R.styleable#ColorDrawable_color 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ColorDrawable extends Drawable { 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ColorState mState; 3895930e13faac8c17dabfaa1478089baa772f091bRomain Guy private final Paint mPaint = new Paint(); 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new black ColorDrawable. 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ColorDrawable() { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(null); 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new ColorDrawable with the specified color. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param color The color to draw. 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ColorDrawable(int color) { 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(null); 5470d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase setColor(color); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ColorDrawable(ColorState state) { 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState = new ColorState(state); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getChangingConfigurations() { 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.getChangingConfigurations() | mState.mChangingConfigurations; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void draw(Canvas canvas) { 6895930e13faac8c17dabfaa1478089baa772f091bRomain Guy if ((mState.mUseColor >>> 24) != 0) { 6995930e13faac8c17dabfaa1478089baa772f091bRomain Guy mPaint.setColor(mState.mUseColor); 7095930e13faac8c17dabfaa1478089baa772f091bRomain Guy canvas.drawRect(getBounds(), mPaint); 7195930e13faac8c17dabfaa1478089baa772f091bRomain Guy } 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7570d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase * Gets the drawable's color value. 7670d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase * 7770d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase * @return int The color to draw. 7870d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase */ 7970d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase public int getColor() { 8070d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase return mState.mUseColor; 8170d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase } 8270d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase 8370d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase /** 8470d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase * Sets the drawable's color value. This action will clobber the results of prior calls to 8570d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase * {@link #setAlpha(int)} on this object, which side-affected the underlying color. 8670d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase * 8770d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase * @param color The color to draw. 8870d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase */ 8970d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase public void setColor(int color) { 909891e1fce5f29d0421d34aa481037417bd70853dChet Haase if (mState.mBaseColor != color || mState.mUseColor != color) { 919891e1fce5f29d0421d34aa481037417bd70853dChet Haase invalidateSelf(); 929891e1fce5f29d0421d34aa481037417bd70853dChet Haase mState.mBaseColor = mState.mUseColor = color; 939891e1fce5f29d0421d34aa481037417bd70853dChet Haase } 9470d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase } 9570d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase 9670d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase /** 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the alpha value of this drawable's color. 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return A value between 0 and 255. 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getAlpha() { 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mState.mUseColor >>> 24; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the color's alpha value. 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param alpha The alpha value to set, between 0 and 255. 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setAlpha(int alpha) { 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project alpha += alpha >> 7; // make it 0..256 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int baseAlpha = mState.mBaseColor >>> 24; 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int useAlpha = baseAlpha * alpha >> 8; 11441bff38d3060dbcb55133cedaf5d962c3082efc2Chet Haase int oldUseColor = mState.mUseColor; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState.mUseColor = (mState.mBaseColor << 8 >>> 8) | (useAlpha << 24); 11641bff38d3060dbcb55133cedaf5d962c3082efc2Chet Haase if (oldUseColor != mState.mUseColor) { 11741bff38d3060dbcb55133cedaf5d962c3082efc2Chet Haase invalidateSelf(); 11841bff38d3060dbcb55133cedaf5d962c3082efc2Chet Haase } 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Setting a color filter on a ColorDrawable has no effect. 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param colorFilter Ignore. 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void setColorFilter(ColorFilter colorFilter) { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getOpacity() { 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project switch (mState.mUseColor >>> 24) { 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case 255: 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return PixelFormat.OPAQUE; 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project case 0: 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return PixelFormat.TRANSPARENT; 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return PixelFormat.TRANSLUCENT; 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs) 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws XmlPullParserException, IOException { 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.inflate(r, parser, attrs); 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = r.obtainAttributes(attrs, com.android.internal.R.styleable.ColorDrawable); 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int color = mState.mBaseColor; 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project color = a.getColor(com.android.internal.R.styleable.ColorDrawable_color, color); 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mState.mBaseColor = mState.mUseColor = color; 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ConstantState getConstantState() { 1556efd2bad954e0e5bd74916a32f036a0f149dcd4dChristopher Lais mState.mChangingConfigurations = getChangingConfigurations(); 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mState; 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final static class ColorState extends ConstantState { 16070d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase int mBaseColor; // base color, independent of setAlpha() 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mUseColor; // basecolor modulated by setAlpha() 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int mChangingConfigurations; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ColorState(ColorState state) { 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (state != null) { 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBaseColor = state.mBaseColor; 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mUseColor = state.mUseColor; 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Drawable newDrawable() { 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new ColorDrawable(this); 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 177c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn public Drawable newDrawable(Resources res) { 178c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn return new ColorDrawable(this); 179c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn } 180c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn 181c2974809373697147cbe5754835cc871fb93aef1Dianne Hackborn @Override 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getChangingConfigurations() { 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mChangingConfigurations; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 187