diff options
Diffstat (limited to 'src/com/android/dreams/phototable/Table.java')
| -rw-r--r-- | src/com/android/dreams/phototable/Table.java | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/src/com/android/dreams/phototable/Table.java b/src/com/android/dreams/phototable/Table.java new file mode 100644 index 0000000..0ffa7ac --- /dev/null +++ b/src/com/android/dreams/phototable/Table.java @@ -0,0 +1,447 @@ +/* + * Copyright (C) 2012 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.dreams.phototable; + +import android.service.dreams.Dream; +import android.content.Context; +import android.content.res.Resources; +import android.graphics.Bitmap; +import android.graphics.BitmapFactory; +import android.graphics.PointF; +import android.graphics.drawable.BitmapDrawable; +import android.graphics.drawable.Drawable; +import android.graphics.drawable.LayerDrawable; +import android.os.AsyncTask; +import android.util.AttributeSet; +import android.util.Log; +import android.view.LayoutInflater; +import android.view.MotionEvent; +import android.view.View; +import android.view.animation.DecelerateInterpolator; +import android.widget.FrameLayout; +import android.widget.FrameLayout.LayoutParams; +import android.widget.ImageView; + +import java.util.LinkedList; +import java.util.Random; + +/** + * A surface where photos sit. + */ +public class Table extends FrameLayout { + private static final String TAG = "PhotoTable.Table"; + private static final boolean DEBUG = false; + + class Launcher implements Runnable { + private final Table mTable; + public Launcher(Table table) { + mTable = table; + } + + @Override + public void run() { + mTable.scheduleNext(mDropPeriod); + mTable.launch(); + } + } + + private static final long MAX_SELECTION_TIME = 10000L; + private static Random sRNG = new Random(); + + private final Launcher mLauncher; + private final LinkedList<View> mOnTable; + private final Dream mDream; + private final int mDropPeriod; + private final int mFastDropPeriod; + private final float mImageRatio; + private final float mTableRatio; + private final float mImageRotationLimit; + private final boolean mTapToExit; + private final int mTableCapacity; + private final int mInset; + private final LocalSource mLocalSource; + private final StockSource mStockSource; + private final Resources mResources; + private PhotoLaunchTask mPhotoLaunchTask; + private boolean mStarted; + private boolean mIsLandscape; + private BitmapFactory.Options mOptions; + private int mLongSide; + private int mShortSide; + private int mWidth; + private int mHeight; + private View mSelected; + private long mSelectedTime; + + public Table(Dream dream, AttributeSet as) { + super(dream, as); + mDream = dream; + mResources = getResources(); + setBackground(mResources.getDrawable(R.drawable.table)); + mInset = mResources.getDimensionPixelSize(R.dimen.photo_inset); + mDropPeriod = mResources.getInteger(R.integer.drop_period); + mFastDropPeriod = mResources.getInteger(R.integer.fast_drop); + mImageRatio = mResources.getInteger(R.integer.image_ratio) / 1000000f; + mTableRatio = mResources.getInteger(R.integer.table_ratio) / 1000000f; + mImageRotationLimit = (float) mResources.getInteger(R.integer.max_image_rotation); + mTableCapacity = mResources.getInteger(R.integer.table_capacity); + mTapToExit = mResources.getBoolean(R.bool.enable_tap_to_exit); + mOnTable = new LinkedList<View>(); + mOptions = new BitmapFactory.Options(); + mOptions.inTempStorage = new byte[32768]; + mLocalSource = new LocalSource(getContext()); + mStockSource = new StockSource(getContext()); + mLauncher = new Launcher(this); + mStarted = false; + } + + public boolean hasSelection() { + return mSelected != null; + } + + public View getSelected() { + return mSelected; + } + + public void clearSelection() { + mSelected = null; + } + + public void setSelection(View selected) { + assert(selected != null); + if (mSelected != null) { + dropOnTable(mSelected); + } + mSelected = selected; + mSelectedTime = System.currentTimeMillis(); + bringChildToFront(selected); + pickUp(selected); + } + + static float lerp(float a, float b, float f) { + return (b-a)*f + a; + } + + static float randfrange(float a, float b) { + return lerp(a, b, sRNG.nextFloat()); + } + + static PointF randFromCurve(float t, PointF[] v) { + PointF p = new PointF(); + if (v.length == 4 && t >= 0f && t <= 1f) { + float a = (float) Math.pow(1f-t, 3f); + float b = (float) Math.pow(1f-t, 2f) * t; + float c = (1f-t) * (float) Math.pow(t, 2f); + float d = (float) Math.pow(t, 3f); + + p.x = a * v[0].x + 3 * b * v[1].x + 3 * c * v[2].x + d * v[3].x; + p.y = a * v[0].y + 3 * b * v[1].y + 3 * c * v[2].y + d * v[3].y; + } + return p; + } + + private static PointF randInCenter(float i, float j, int width, int height) { + log("randInCenter (" + i + ", " + j + ", " + width + ", " + height + ")"); + PointF p = new PointF(); + p.x = 0.5f * width + 0.15f * width * i; + p.y = 0.5f * height + 0.15f * height * j; + log("randInCenter returning " + p.x + "," + p.y); + return p; + } + + @Override + public boolean onTouchEvent(MotionEvent event) { + if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { + if (hasSelection()) { + dropOnTable(getSelected()); + clearSelection(); + } else { + if (mTapToExit) { + mDream.finish(); + } + } + return true; + } + return false; + } + + @Override + public void onLayout(boolean changed, int left, int top, int right, int bottom) { + super.onLayout(changed, left, top, right, bottom); + log("onLayout (" + left + ", " + top + ", " + right + ", " + bottom + ")"); + + mHeight = bottom - top; + mWidth = right - left; + + mLongSide = (int) (mImageRatio * Math.max(mWidth, mHeight)); + mShortSide = (int) (mImageRatio * Math.min(mWidth, mHeight)); + + boolean isLandscape = mWidth > mHeight; + if (mIsLandscape != isLandscape) { + for (View photo: mOnTable) { + if (photo == getSelected()) { + pickUp(photo); + } else { + dropOnTable(photo); + } + } + mIsLandscape = isLandscape; + } + start(); + } + + @Override + public boolean isOpaque() { + return true; + } + + static class PhotoLaunchTask extends AsyncTask<Void, Void, View> { + private Table mTable; + public PhotoLaunchTask(Table table) { + mTable = table; + } + @Override + public View doInBackground(Void... unused) { + log("load a new photo"); + LayoutInflater inflater = (LayoutInflater) mTable.getContext() + .getSystemService(Context.LAYOUT_INFLATER_SERVICE); + View photo = inflater.inflate(R.layout.photo, null); + ImageView image = (ImageView) photo; + Drawable[] layers = new Drawable[2]; + Bitmap decodedPhoto = null; + decodedPhoto = mTable.mLocalSource.next(mTable.mOptions, + mTable.mLongSide, mTable.mShortSide); + if (decodedPhoto == null) { + decodedPhoto = mTable.mStockSource.next(mTable.mOptions, + mTable.mLongSide, mTable.mShortSide); + } + int photoWidth = mTable.mOptions.outWidth; + int photoHeight = mTable.mOptions.outHeight; + if (mTable.mOptions.outWidth <= 0 || mTable.mOptions.outHeight <= 0) { + photo = null; + } else { + layers[0] = new BitmapDrawable(mTable.mResources, decodedPhoto); + layers[1] = mTable.mResources.getDrawable(R.drawable.frame); + LayerDrawable layerList = new LayerDrawable(layers); + layerList.setLayerInset(0, mTable.mInset, mTable.mInset, + mTable.mInset, mTable.mInset); + image.setImageDrawable(layerList); + + photo.setTag(R.id.photo_width, new Integer(photoWidth)); + photo.setTag(R.id.photo_height, new Integer(photoHeight)); + + photo.setOnTouchListener(new PhotoTouchListener(mTable.getContext(), mTable)); + } + + return photo; + } + + @Override + public void onPostExecute(View photo) { + if (photo != null) { + mTable.addView(photo, new LayoutParams(LayoutParams.WRAP_CONTENT, + LayoutParams.WRAP_CONTENT)); + if (mTable.hasSelection()) { + mTable.bringChildToFront(mTable.getSelected()); + } + int width = ((Integer) photo.getTag(R.id.photo_width)).intValue(); + int height = ((Integer) photo.getTag(R.id.photo_height)).intValue(); + + log("drop it"); + mTable.throwOnTable(photo); + } + if(mTable.mOnTable.size() < mTable.mTableCapacity) { + mTable.scheduleNext(mTable.mFastDropPeriod); + } + } + }; + + public void launch() { + log("launching"); + setSystemUiVisibility(View.STATUS_BAR_HIDDEN); + if (hasSelection() && + (System.currentTimeMillis() - mSelectedTime) > MAX_SELECTION_TIME) { + dropOnTable(getSelected()); + clearSelection(); + } else { + log("inflate it"); + if (mPhotoLaunchTask == null || + mPhotoLaunchTask.getStatus() == AsyncTask.Status.FINISHED) { + mPhotoLaunchTask = new PhotoLaunchTask(this); + mPhotoLaunchTask.execute(); + } + } + } + public void fadeAway(final View photo, final boolean replace) { + // fade out of view + mOnTable.remove(photo); + photo.animate().cancel(); + photo.animate() + .withLayer() + .alpha(0f) + .setDuration(1000) + .withEndAction(new Runnable() { + @Override + public void run() { + removeView(photo); + recycle(photo); + if (replace) { + launch(); + } + } + }); + } + + public void moveToBackOfQueue(View photo) { + // make this photo the last to be removed. + bringChildToFront(photo); + invalidate(); + mOnTable.remove(photo); + mOnTable.offer(photo); + } + + private void throwOnTable(final View photo) { + mOnTable.offer(photo); + log("start offscreen"); + int width = ((Integer) photo.getTag(R.id.photo_width)); + int height = ((Integer) photo.getTag(R.id.photo_height)); + photo.setRotation(-100.0f); + photo.setX(-mLongSide); + photo.setY(-mLongSide); + dropOnTable(photo); + } + + public void dropOnTable(final View photo) { + float angle = randfrange(-mImageRotationLimit, mImageRotationLimit); + PointF p = randInCenter((float) sRNG.nextGaussian(), (float) sRNG.nextGaussian(), + mWidth, mHeight); + float x = p.x; + float y = p.y; + + log("drop it at " + x + ", " + y); + + float x0 = photo.getX(); + float y0 = photo.getY(); + float width = (float) ((Integer) photo.getTag(R.id.photo_width)).intValue(); + float height = (float) ((Integer) photo.getTag(R.id.photo_height)).intValue(); + + x -= mTableRatio * mLongSide / 2f; + y -= mTableRatio * mLongSide / 2f; + log("fixed offset is " + x + ", " + y); + + float dx = x - x0; + float dy = y - y0; + + float dist = (float) (Math.sqrt(dx * dx + dy * dy)); + int duration = (int) (1000f * dist / 400f); + duration = Math.max(duration, 1000); + + log("animate it"); + // toss onto table + photo.animate() + .withLayer() + .scaleX(mTableRatio / mImageRatio) + .scaleY(mTableRatio / mImageRatio) + .rotation(angle) + .x(x) + .y(y) + .setDuration(duration) + .setInterpolator(new DecelerateInterpolator(3f)) + .withEndAction(new Runnable() { + @Override + public void run() { + while (mOnTable.size() > mTableCapacity) { + fadeAway(mOnTable.poll(), false); + } + } + }); + } + + /** wrap all orientations to the interval [-180, 180). */ + private float wrapAngle(float angle) { + float result = angle + 180; + result = ((result % 360) + 360) % 360; // catch negative numbers + result -= 180; + return result; + } + + private void pickUp(final View photo) { + float photoWidth = photo.getWidth(); + float photoHeight = photo.getHeight(); + + float scale = Math.min(getHeight() / photoHeight, getWidth() / photoWidth); + + log("target it"); + float x = (getWidth() - photoWidth) / 2f; + float y = (getHeight() - photoHeight) / 2f; + + float x0 = photo.getX(); + float y0 = photo.getY(); + float dx = x - x0; + float dy = y - y0; + + float dist = (float) (Math.sqrt(dx * dx + dy * dy)); + int duration = (int) (1000f * dist / 1000f); + duration = Math.max(duration, 500); + + photo.setRotation(wrapAngle(photo.getRotation())); + + log("animate it"); + // toss onto table + photo.animate() + .withLayer() + .rotation(0f) + .scaleX(scale) + .scaleY(scale) + .x(x) + .y(y) + .setDuration(duration) + .setInterpolator(new DecelerateInterpolator(2f)) + .withEndAction(new Runnable() { + @Override + public void run() { + log("endtimes: " + photo.getX()); + } + }); + } + + private void recycle(View photo) { + ImageView image = (ImageView) photo; + LayerDrawable layers = (LayerDrawable) image.getDrawable(); + BitmapDrawable bitmap = (BitmapDrawable) layers.getDrawable(0); + bitmap.getBitmap().recycle(); + } + + public void start() { + if (!mStarted) { + log("kick it"); + mStarted = true; + scheduleNext(mDropPeriod); + launch(); + } + } + + public void scheduleNext(int delay) { + removeCallbacks(mLauncher); + postDelayed(mLauncher, delay); + } + + private static void log(String message) { + if (DEBUG) { + Log.i(TAG, message); + } + } +} |