1 /* 2 * Copyright (C) 2016 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 17 package com.android.server.wm.animation; 18 19 import android.graphics.Rect; 20 import android.view.animation.ClipRectAnimation; 21 import android.view.animation.Transformation; 22 23 /** 24 * Special case of ClipRectAnimation that animates only the left/right 25 * dimensions of the clip, picking up the other dimensions from whatever is 26 * set on the transform already. 27 * 28 * @hide 29 */ 30 public class ClipRectLRAnimation extends ClipRectAnimation { 31 32 /** 33 * Constructor. Passes in 0 for Top/Bottom parameters of ClipRectAnimation 34 */ 35 public ClipRectLRAnimation(int fromL, int fromR, int toL, int toR) { 36 super(fromL, 0, fromR, 0, toL, 0, toR, 0); 37 } 38 39 /** 40 * Calculates and sets clip rect on given transformation. It uses existing values 41 * on the Transformation for Top/Bottom clip parameters. 42 */ 43 @Override 44 protected void applyTransformation(float it, Transformation tr) { 45 Rect oldClipRect = tr.getClipRect(); 46 tr.setClipRect(mFromRect.left + (int) ((mToRect.left - mFromRect.left) * it), 47 oldClipRect.top, 48 mFromRect.right + (int) ((mToRect.right - mFromRect.right) * it), 49 oldClipRect.bottom); 50 } 51 } 52
