| /* |
| * 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 android.util.SparseArray; |
| |
| import com.android.gallery3d.app.GalleryActivity; |
| import com.android.gallery3d.common.Utils; |
| |
| 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 SparseArray<Position> mData = new SparseArray<Position>(); |
| private int mOffsetX; |
| private int mOffsetY; |
| private Position mTempPosition = new Position(); |
| |
| public Position get(int 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(int identity, Position position) { |
| Position clone = position.clone(); |
| clone.x += mOffsetX; |
| clone.y += mOffsetY; |
| mData.put(identity, clone); |
| } |
| |
| public void clear() { |
| mData.clear(); |
| } |
| } |