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/*
* 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.Rect;
/**
* Special case of ClipRectAnimation that animates only the top/bottom
* dimensions of the clip, picking up the other dimensions from whatever is
* set on the transform already.
*
* @hide
*/
public class ClipRectTBAnimation extends ClipRectAnimation {
/**
* Constructor. Passes in 0 for Left/Right parameters of ClipRectAnimation
*/
public ClipRectTBAnimation(int fromT, int fromB, int toT, int toB) {
super(0, fromT, 0, fromB, 0, toT, 0, toB);
}
/**
* Calculates and sets clip rect on given transformation. It uses existing values
* on the Transformation for Left/Right clip parameters.
*/
@Override
protected void applyTransformation(float it, Transformation tr) {
Rect oldClipRect = tr.getClipRect();
tr.setClipRect(oldClipRect.left, mFromRect.top + (int) ((mToRect.top - mFromRect.top) * it),
oldClipRect.right,
mFromRect.bottom + (int) ((mToRect.bottom - mFromRect.bottom) * it));
}
}
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