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.view.animation; 18 19import android.graphics.Rect; 20 21/** 22 * Special case of ClipRectAnimation that animates only the top/bottom 23 * dimensions of the clip, picking up the other dimensions from whatever is 24 * set on the transform already. 25 * 26 * @hide 27 */ 28public class ClipRectTBAnimation extends ClipRectAnimation { 29 30 /** 31 * Constructor. Passes in 0 for Left/Right parameters of ClipRectAnimation 32 */ 33 public ClipRectTBAnimation(int fromT, int fromB, int toT, int toB) { 34 super(0, fromT, 0, fromB, 0, toT, 0, toB); 35 } 36 37 /** 38 * Calculates and sets clip rect on given transformation. It uses existing values 39 * on the Transformation for Left/Right clip parameters. 40 */ 41 @Override 42 protected void applyTransformation(float it, Transformation tr) { 43 Rect oldClipRect = tr.getClipRect(); 44 tr.setClipRect(oldClipRect.left, mFromRect.top + (int) ((mToRect.top - mFromRect.top) * it), 45 oldClipRect.right, 46 mFromRect.bottom + (int) ((mToRect.bottom - mFromRect.bottom) * it)); 47 } 48 49} 50