| /* |
| * Copyright (C) 2015 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.Matrix; |
| |
| /** |
| * Special case of TranslateAnimation that translates only horizontally, picking up the |
| * vertical values from whatever is set on the Transformation already. When used in |
| * conjunction with a TranslateYAnimation, allows independent animation of x and y |
| * position. |
| * @hide |
| */ |
| public class TranslateXAnimation extends TranslateAnimation { |
| float[] mTmpValues = new float[9]; |
| |
| /** |
| * Constructor. Passes in 0 for the y parameters of TranslateAnimation |
| */ |
| public TranslateXAnimation(float fromXDelta, float toXDelta) { |
| super(fromXDelta, toXDelta, 0, 0); |
| } |
| |
| /** |
| * Constructor. Passes in 0 for the y parameters of TranslateAnimation |
| */ |
| public TranslateXAnimation(int fromXType, float fromXValue, int toXType, float toXValue) { |
| super(fromXType, fromXValue, toXType, toXValue, ABSOLUTE, 0, ABSOLUTE, 0); |
| } |
| |
| /** |
| * Calculates and sets x translation values on given transformation. |
| */ |
| @Override |
| protected void applyTransformation(float interpolatedTime, Transformation t) { |
| Matrix m = t.getMatrix(); |
| m.getValues(mTmpValues); |
| float dx = mFromXDelta + ((mToXDelta - mFromXDelta) * interpolatedTime); |
| t.getMatrix().setTranslate(dx, mTmpValues[Matrix.MTRANS_Y]); |
| } |
| } |