| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view.animation; |
| |
| import android.graphics.Rect; |
| |
| /** |
| * An animation that controls the clip of an object. See the |
| * {@link android.view.animation full package} description for details and |
| * sample code. |
| * |
| * @hide |
| */ |
| public class ClipRectAnimation extends Animation { |
| protected Rect mFromRect = new Rect(); |
| protected Rect mToRect = new Rect(); |
| |
| /** |
| * Constructor to use when building a ClipRectAnimation from code |
| * |
| * @param fromClip the clip rect to animate from |
| * @param toClip the clip rect to animate to |
| */ |
| public ClipRectAnimation(Rect fromClip, Rect toClip) { |
| if (fromClip == null || toClip == null) { |
| throw new RuntimeException("Expected non-null animation clip rects"); |
| } |
| mFromRect.set(fromClip); |
| mToRect.set(toClip); |
| } |
| |
| /** |
| * Constructor to use when building a ClipRectAnimation from code |
| */ |
| public ClipRectAnimation(int fromL, int fromT, int fromR, int fromB, |
| int toL, int toT, int toR, int toB) { |
| mFromRect.set(fromL, fromT, fromR, fromB); |
| mToRect.set(toL, toT, toR, toB); |
| } |
| |
| @Override |
| protected void applyTransformation(float it, Transformation tr) { |
| int l = mFromRect.left + (int) ((mToRect.left - mFromRect.left) * it); |
| int t = mFromRect.top + (int) ((mToRect.top - mFromRect.top) * it); |
| int r = mFromRect.right + (int) ((mToRect.right - mFromRect.right) * it); |
| int b = mFromRect.bottom + (int) ((mToRect.bottom - mFromRect.bottom) * it); |
| tr.setClipRect(l, t, r, b); |
| } |
| |
| @Override |
| public boolean willChangeTransformationMatrix() { |
| return false; |
| } |
| } |