ScaleAnimation.java revision bdbdc4f92951200a88d4c754448b9f91626ffc04
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 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.view.animation; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * An animation that controls the scale of an object. You can specify the point 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to use for the center of scaling. 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ScaleAnimation extends Animation { 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mFromX; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mToX; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mFromY; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mToY; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mPivotXType = ABSOLUTE; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mPivotYType = ABSOLUTE; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mPivotXValue = 0.0f; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mPivotYValue = 0.0f; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mPivotX; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mPivotY; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 43bdbdc4f92951200a88d4c754448b9f91626ffc04The Android Open Source Project * Constructor used when a ScaleAnimation is loaded from a resource. 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param context Application context to use 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param attrs Attribute set from which to read values 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScaleAnimation(Context context, AttributeSet attrs) { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs); 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray a = context.obtainStyledAttributes(attrs, 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ScaleAnimation); 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromX = a.getFloat(com.android.internal.R.styleable.ScaleAnimation_fromXScale, 0.0f); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToX = a.getFloat(com.android.internal.R.styleable.ScaleAnimation_toXScale, 0.0f); 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromY = a.getFloat(com.android.internal.R.styleable.ScaleAnimation_fromYScale, 0.0f); 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToY = a.getFloat(com.android.internal.R.styleable.ScaleAnimation_toYScale, 0.0f); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Description d = Description.parseValue(a.peekValue( 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ScaleAnimation_pivotX)); 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotXType = d.type; 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotXValue = d.value; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project d = Description.parseValue(a.peekValue( 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.styleable.ScaleAnimation_pivotY)); 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotYType = d.type; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotYValue = d.value; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project a.recycle(); 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor to use when building a ScaleAnimation from code 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromX Horizontal scaling factor to apply at the start of the 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * animation 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toX Horizontal scaling factor to apply at the end of the animation 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromY Vertical scaling factor to apply at the start of the 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * animation 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toY Vertical scaling factor to apply at the end of the animation 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScaleAnimation(float fromX, float toX, float fromY, float toY) { 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromX = fromX; 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToX = toX; 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromY = fromY; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToY = toY; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotX = 0; 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotY = 0; 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor to use when building a ScaleAnimation from code 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromX Horizontal scaling factor to apply at the start of the 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * animation 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toX Horizontal scaling factor to apply at the end of the animation 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromY Vertical scaling factor to apply at the start of the 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * animation 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toY Vertical scaling factor to apply at the end of the animation 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pivotX The X coordinate of the point about which the object is 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being scaled, specified as an absolute number where 0 is the left 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge. (This point remains fixed while the object changes size.) 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pivotY The Y coordinate of the point about which the object is 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * being scaled, specified as an absolute number where 0 is the top 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * edge. (This point remains fixed while the object changes size.) 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScaleAnimation(float fromX, float toX, float fromY, float toY, 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float pivotX, float pivotY) { 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromX = fromX; 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToX = toX; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromY = fromY; 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToY = toY; 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotXType = ABSOLUTE; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotYType = ABSOLUTE; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotXValue = pivotX; 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotYValue = pivotY; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Constructor to use when building a ScaleAnimation from code 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromX Horizontal scaling factor to apply at the start of the 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * animation 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toX Horizontal scaling factor to apply at the end of the animation 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fromY Vertical scaling factor to apply at the start of the 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * animation 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param toY Vertical scaling factor to apply at the end of the animation 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pivotXType Specifies how pivotXValue should be interpreted. One of 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Animation.RELATIVE_TO_PARENT. 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pivotXValue The X coordinate of the point about which the object 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is being scaled, specified as an absolute number where 0 is the 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * left edge. (This point remains fixed while the object changes 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * size.) This value can either be an absolute number if pivotXType 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise. 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pivotYType Specifies how pivotYValue should be interpreted. One of 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Animation.RELATIVE_TO_PARENT. 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pivotYValue The Y coordinate of the point about which the object 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is being scaled, specified as an absolute number where 0 is the 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * top edge. (This point remains fixed while the object changes 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * size.) This value can either be an absolute number if pivotYType 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise. 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ScaleAnimation(float fromX, float toX, float fromY, float toY, 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int pivotXType, float pivotXValue, int pivotYType, float pivotYValue) { 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromX = fromX; 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToX = toX; 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFromY = fromY; 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mToY = toY; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotXValue = pivotXValue; 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotXType = pivotXType; 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotYValue = pivotYValue; 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotYType = pivotYType; 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected void applyTransformation(float interpolatedTime, Transformation t) { 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float sx = 1.0f; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float sy = 1.0f; 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFromX != 1.0f || mToX != 1.0f) { 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sx = mFromX + ((mToX - mFromX) * interpolatedTime); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFromY != 1.0f || mToY != 1.0f) { 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sy = mFromY + ((mToY - mFromY) * interpolatedTime); 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mPivotX == 0 && mPivotY == 0) { 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project t.getMatrix().setScale(sx, sy); 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project t.getMatrix().setScale(sx, sy, mPivotX, mPivotY); 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void initialize(int width, int height, int parentWidth, int parentHeight) { 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.initialize(width, height, parentWidth, parentHeight); 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotX = resolveSize(mPivotXType, mPivotXValue, width, parentWidth); 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPivotY = resolveSize(mPivotYType, mPivotYValue, height, parentHeight); 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 187