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/*
* 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.content.Context;
import android.content.res.TypedArray;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
/**
* 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 final Rect mFromRect = new Rect();
protected final Rect mToRect = new Rect();
private int mFromLeftType = ABSOLUTE;
private int mFromTopType = ABSOLUTE;
private int mFromRightType = ABSOLUTE;
private int mFromBottomType = ABSOLUTE;
private int mToLeftType = ABSOLUTE;
private int mToTopType = ABSOLUTE;
private int mToRightType = ABSOLUTE;
private int mToBottomType = ABSOLUTE;
private float mFromLeftValue;
private float mFromTopValue;
private float mFromRightValue;
private float mFromBottomValue;
private float mToLeftValue;
private float mToTopValue;
private float mToRightValue;
private float mToBottomValue;
/**
* Constructor used when a ClipRectAnimation is loaded from a resource.
*
* @param context Application context to use
* @param attrs Attribute set from which to read values
*/
public ClipRectAnimation(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.ClipRectAnimation);
Description d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_fromLeft));
mFromLeftType = d.type;
mFromLeftValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_fromTop));
mFromTopType = d.type;
mFromTopValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_fromRight));
mFromRightType = d.type;
mFromRightValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_fromBottom));
mFromBottomType = d.type;
mFromBottomValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_toLeft));
mToLeftType = d.type;
mToLeftValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_toTop));
mToTopType = d.type;
mToTopValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_toRight));
mToRightType = d.type;
mToRightValue = d.value;
d = Description.parseValue(a.peekValue(
com.android.internal.R.styleable.ClipRectAnimation_toBottom));
mToBottomType = d.type;
mToBottomValue = d.value;
a.recycle();
}
/**
* 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");
}
mFromLeftValue = fromClip.left;
mFromTopValue = fromClip.top;
mFromRightValue= fromClip.right;
mFromBottomValue = fromClip.bottom;
mToLeftValue = toClip.left;
mToTopValue = toClip.top;
mToRightValue= toClip.right;
mToBottomValue = toClip.bottom;
}
/**
* 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) {
this(new Rect(fromL, fromT, fromR, fromB), new Rect(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;
}
@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
mFromRect.set((int) resolveSize(mFromLeftType, mFromLeftValue, width, parentWidth),
(int) resolveSize(mFromTopType, mFromTopValue, height, parentHeight),
(int) resolveSize(mFromRightType, mFromRightValue, width, parentWidth),
(int) resolveSize(mFromBottomType, mFromBottomValue, height, parentHeight));
mToRect.set((int) resolveSize(mToLeftType, mToLeftValue, width, parentWidth),
(int) resolveSize(mToTopType, mToTopValue, height, parentHeight),
(int) resolveSize(mToRightType, mToRightValue, width, parentWidth),
(int) resolveSize(mToBottomType, mToBottomValue, height, parentHeight));
}
}
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