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/*
* Copyright (C) 2010 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 com.android.gallery3d.ui;
import com.android.gallery3d.app.GalleryActivity;
import com.android.gallery3d.common.Utils;
import java.util.HashMap;
import java.util.WeakHashMap;
public class PositionRepository {
private static final WeakHashMap<GalleryActivity, PositionRepository>
sMap = new WeakHashMap<GalleryActivity, PositionRepository>();
public static class Position implements Cloneable {
public float x;
public float y;
public float z;
public float theta;
public float alpha;
public Position() {
}
public Position(float x, float y, float z) {
this(x, y, z, 0f, 1f);
}
public Position(float x, float y, float z, float ftheta, float alpha) {
this.x = x;
this.y = y;
this.z = z;
this.theta = ftheta;
this.alpha = alpha;
}
@Override
public Position clone() {
try {
return (Position) super.clone();
} catch (CloneNotSupportedException e) {
throw new AssertionError(); // we do support clone.
}
}
public void set(Position another) {
x = another.x;
y = another.y;
z = another.z;
theta = another.theta;
alpha = another.alpha;
}
public void set(float x, float y, float z, float ftheta, float alpha) {
this.x = x;
this.y = y;
this.z = z;
this.theta = ftheta;
this.alpha = alpha;
}
@Override
public boolean equals(Object object) {
if (!(object instanceof Position)) return false;
Position position = (Position) object;
return x == position.x && y == position.y && z == position.z
&& theta == position.theta
&& alpha == position.alpha;
}
public static void interpolate(
Position source, Position target, Position output, float progress) {
if (progress < 1f) {
output.set(
Utils.interpolateScale(source.x, target.x, progress),
Utils.interpolateScale(source.y, target.y, progress),
Utils.interpolateScale(source.z, target.z, progress),
Utils.interpolateAngle(source.theta, target.theta, progress),
Utils.interpolateScale(source.alpha, target.alpha, progress));
} else {
output.set(target);
}
}
}
public static PositionRepository getInstance(GalleryActivity activity) {
PositionRepository repository = sMap.get(activity);
if (repository == null) {
repository = new PositionRepository();
sMap.put(activity, repository);
}
return repository;
}
private HashMap<Long, Position> mData = new HashMap<Long, Position>();
private int mOffsetX;
private int mOffsetY;
private Position mTempPosition = new Position();
public Position get(Long identity) {
Position position = mData.get(identity);
if (position == null) return null;
mTempPosition.set(position);
position = mTempPosition;
position.x -= mOffsetX;
position.y -= mOffsetY;
return position;
}
public void setOffset(int offsetX, int offsetY) {
mOffsetX = offsetX;
mOffsetY = offsetY;
}
public void putPosition(Long identity, Position position) {
Position clone = position.clone();
clone.x += mOffsetX;
clone.y += mOffsetY;
mData.put(identity, clone);
}
public void clear() {
mData.clear();
}
}
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