/* * Copyright (C) 2011 Google Inc. * Licensed to 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.ex.photo.adapters; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.support.v4.app.Fragment; import android.support.v4.util.SimpleArrayMap; import com.android.ex.photo.Intents; import com.android.ex.photo.Intents.PhotoViewIntentBuilder; import com.android.ex.photo.fragments.PhotoViewFragment; import com.android.ex.photo.provider.PhotoContract.PhotoViewColumns; import com.android.ex.photo.provider.PhotoContract.PhotoQuery; /** * Pager adapter for the photo view */ public class PhotoPagerAdapter extends BaseCursorPagerAdapter { protected SimpleArrayMap mColumnIndices = new SimpleArrayMap(PhotoQuery.PROJECTION.length); protected final float mMaxScale; protected boolean mDisplayThumbsFullScreen; public PhotoPagerAdapter( Context context, android.support.v4.app.FragmentManager fm, Cursor c, float maxScale, boolean thumbsFullScreen) { super(context, fm, c); mMaxScale = maxScale; mDisplayThumbsFullScreen = thumbsFullScreen; } @Override public Fragment getItem(Context context, Cursor cursor, int position) { final String photoUri = getPhotoUri(cursor); final String thumbnailUri = getThumbnailUri(cursor); boolean loading = shouldShowLoadingIndicator(cursor); boolean onlyShowSpinner = false; if(photoUri == null && loading) { onlyShowSpinner = true; } // create new PhotoViewFragment final PhotoViewIntentBuilder builder = Intents.newPhotoViewFragmentIntentBuilder(mContext, getPhotoViewFragmentClass()); builder .setResolvedPhotoUri(photoUri) .setThumbnailUri(thumbnailUri) .setDisplayThumbsFullScreen(mDisplayThumbsFullScreen) .setMaxInitialScale(mMaxScale); return createPhotoViewFragment(builder.build(), position, onlyShowSpinner); } protected Class getPhotoViewFragmentClass() { return PhotoViewFragment.class; } protected PhotoViewFragment createPhotoViewFragment( Intent intent, int position, boolean onlyShowSpinner) { return PhotoViewFragment.newInstance(intent, position, onlyShowSpinner); } @Override public Cursor swapCursor(Cursor newCursor) { mColumnIndices.clear(); if (newCursor != null) { for(String column : PhotoQuery.PROJECTION) { mColumnIndices.put(column, newCursor.getColumnIndexOrThrow(column)); } for(String column : PhotoQuery.OPTIONAL_COLUMNS) { int index = newCursor.getColumnIndex(column); if (index != -1) { mColumnIndices.put(column, index); } } } return super.swapCursor(newCursor); } public String getPhotoUri(Cursor cursor) { return getString(cursor, PhotoViewColumns.CONTENT_URI); } public String getThumbnailUri(Cursor cursor) { return getString(cursor, PhotoViewColumns.THUMBNAIL_URI); } public String getContentType(Cursor cursor) { return getString(cursor, PhotoViewColumns.CONTENT_TYPE); } public boolean shouldShowLoadingIndicator(Cursor cursor) { String value = getString(cursor, PhotoViewColumns.LOADING_INDICATOR); if (value == null) { return false; } else { return Boolean.valueOf(value); } } private String getString(Cursor cursor, String column) { if (mColumnIndices.containsKey(column)) { return cursor.getString(mColumnIndices.get(column)); } else { return null; } } }