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Diffstat (limited to 'src/com/android/gallery3d/ui/PositionRepository.java')
-rw-r--r-- | src/com/android/gallery3d/ui/PositionRepository.java | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ui/PositionRepository.java b/src/com/android/gallery3d/ui/PositionRepository.java new file mode 100644 index 000000000..0b829fa25 --- /dev/null +++ b/src/com/android/gallery3d/ui/PositionRepository.java @@ -0,0 +1,139 @@ +/* + * 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(); + } +} |