Started working on displaying user avatars

Currently the downloading and displaying of avatar images is working,
however we now need to fetch the author avatar url from the forum.

Signed-off-by: Ricky Barrette <rickbarrette@gmail.com>

OSJ Forum/src/com/commonsware/cwac/thumbnail/ThumbnailAdapter.java

@@ -0,0 +1,111 @@
+/***
+	Copyright (c) 2008-2009 CommonsWare, LLC
+	
+	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.commonsware.cwac.thumbnail;
+
+import org.RickBarrette.osj.forum.Log;
+
+import android.app.Activity;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.ListAdapter;
+
+import com.commonsware.cwac.adapter.AdapterWrapper;
+import com.commonsware.cwac.cache.SimpleWebImageCache;
+
+public class ThumbnailAdapter extends AdapterWrapper {
+	private static final String TAG = "ThumbnailAdapter";
+	private final int[] imageIds;
+	private SimpleWebImageCache<ThumbnailBus, ThumbnailMessage> cache = null;
+	private Activity host = null;
+
+	private final ThumbnailBus.Receiver<ThumbnailMessage> onCache = new ThumbnailBus.Receiver<ThumbnailMessage>() {
+		@Override
+		public void onReceive(final ThumbnailMessage message) {
+			final ImageView image = message.getImageView();
+
+			host.runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					if (image.getTag() != null && image.getTag().toString().equals(message.getUrl()))
+						image.setImageDrawable(cache.get(message.getUrl()));
+				}
+			});
+		}
+	};
+
+	/**
+	 * Constructor wrapping a supplied ListAdapter
+	 */
+	public ThumbnailAdapter(final Activity host, final ListAdapter wrapped, final SimpleWebImageCache<ThumbnailBus, ThumbnailMessage> cache, final int[] imageIds) {
+		super(wrapped);
+
+		this.host = host;
+		this.imageIds = imageIds;
+		this.cache = cache;
+
+		cache.getBus().register(getBusKey(), onCache);
+	}
+
+	public void close() {
+		cache.getBus().unregister(onCache);
+	}
+
+	private String getBusKey() {
+		return toString();
+	}
+
+	/**
+	 * Get a View that displays the data at the specified position in the data
+	 * set. In this case, if we are at the end of the list and we are still in
+	 * append mode, we ask for a pending view and return it, plus kick off the
+	 * background task to append more data to the wrapped adapter.
+	 * 
+	 * @param position
+	 *            Position of the item whose data we want
+	 * @param convertView
+	 *            View to recycle, if not null
+	 * @param parent
+	 *            ViewGroup containing the returned View
+	 */
+	@Override
+	public View getView(final int position, final View convertView, final ViewGroup parent) {
+		final View result = super.getView(position, convertView, parent);
+
+		processView(result);
+
+		return result;
+	}
+
+	public void processView(final View row) {
+		Log.v(TAG, "Processing View");
+		for (final int imageId : imageIds) {
+			final ImageView image = (ImageView) row.findViewById(imageId);
+
+			if (image != null && image.getTag() != null) {
+				final ThumbnailMessage msg = cache.getBus().createMessage(getBusKey());
+
+				msg.setImageView(image);
+				msg.setUrl(image.getTag().toString());
+
+				try {
+					cache.notify(msg.getUrl(), msg);
+				} catch (final Throwable t) {
+					Log.e(TAG, "Exception trying to fetch image", t);
+				}
+			}
+		}
+	}
+}

OSJ Forum/src/com/commonsware/cwac/thumbnail/ThumbnailBus.java

@@ -0,0 +1,36 @@
+/***
+	Copyright (c) 2008-2009 CommonsWare, LLC
+	
+	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.commonsware.cwac.thumbnail;
+
+import com.commonsware.cwac.bus.AbstractBus;
+
+public class ThumbnailBus extends AbstractBus<ThumbnailMessage, String, ThumbnailBus.MatchStrategy> {
+	class MatchStrategy implements AbstractBus.Strategy<ThumbnailMessage, String> {
+		@Override
+		public boolean isMatch(final ThumbnailMessage message, final String filter) {
+			return filter != null && message != null && filter.equals(message.getKey());
+		}
+	}
+
+	public ThumbnailBus() {
+		super();
+
+		setStrategy(new MatchStrategy());
+	}
+
+	public ThumbnailMessage createMessage(final String key) {
+		return new ThumbnailMessage(key);
+	}
+}

OSJ Forum/src/com/commonsware/cwac/thumbnail/ThumbnailMessage.java

@@ -0,0 +1,47 @@
+/***
+Copyright (c) 2008-2009 CommonsWare, LLC
+
+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.commonsware.cwac.thumbnail;
+
+import android.widget.ImageView;
+
+public class ThumbnailMessage {
+	private final String key;
+	private ImageView image;
+	private String url;
+
+	public ThumbnailMessage(final String key) {
+		this.key = key;
+	}
+
+	public ImageView getImageView() {
+		return image;
+	}
+
+	public String getKey() {
+		return key;
+	}
+
+	public String getUrl() {
+		return url;
+	}
+
+	public void setImageView(final ImageView image) {
+		this.image = image;
+	}
+
+	public void setUrl(final String url) {
+		this.url = url;
+	}
+}