Merge pull request #183 from dzan/fix_swipe_select

Revert to swipe to enter multi select mode.

src/com/fsck/k9/activity/MessageList.java

@@ -25,8 +25,10 @@ import android.text.style.ForegroundColorSpan;
 import android.text.style.StyleSpan;
 import android.util.Log;
 import android.util.TypedValue;
+import android.view.GestureDetector;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.ViewGroup;
@@ -58,6 +60,8 @@ import com.fsck.k9.K9;
 import com.fsck.k9.Preferences;
 import com.fsck.k9.R;
 import com.fsck.k9.SearchSpecification;
+import com.fsck.k9.activity.misc.SwipeGestureDetector;
+import com.fsck.k9.activity.misc.SwipeGestureDetector.OnSwipeGestureListener;
 import com.fsck.k9.activity.setup.AccountSettings;
 import com.fsck.k9.activity.setup.FolderSettings;
 import com.fsck.k9.activity.setup.Prefs;
@@ -82,7 +86,8 @@ import com.handmark.pulltorefresh.library.PullToRefreshListView;
  * shows a list of messages.
  * From this Activity the user can perform all standard message operations.
  */
-public class MessageList extends K9ListActivity implements OnItemClickListener {
+public class MessageList extends K9ListActivity implements OnItemClickListener,
+        OnSwipeGestureListener {
 
     /**
      * Reverses the result of a {@link Comparator}.
@@ -675,6 +680,9 @@ public class MessageList extends K9ListActivity implements OnItemClickListener {
         initializeMessageList(getIntent(), true);
         mListView.setVerticalFadingEdgeEnabled(false);
 
+        // Enable gesture detection for MessageLists
+        mGestureDetector = new GestureDetector(new SwipeGestureDetector(this, this));
+
         // Enable context action bar behaviour
         mListView.setOnItemLongClickListener(new OnItemLongClickListener() {
             @Override
@@ -1517,6 +1525,33 @@ public class MessageList extends K9ListActivity implements OnItemClickListener {
         return true;
     }
 
+    @Override
+    public void onSwipeRightToLeft(final MotionEvent e1, final MotionEvent e2) {
+        // Handle right-to-left as an un-select
+        handleSwipe(e1, false);
+    }
+
+    @Override
+    public void onSwipeLeftToRight(final MotionEvent e1, final MotionEvent e2) {
+        // Handle left-to-right as a select.
+        handleSwipe(e1, true);
+    }
+
+    /**
+     * Handle a select or unselect swipe event
+     * @param downMotion Event that started the swipe
+     * @param selected true if this was an attempt to select (i.e. left to right).
+     */
+    private void handleSwipe(final MotionEvent downMotion, final boolean selected) {
+        int[] listPosition = new int[2];
+        mListView.getLocationOnScreen(listPosition);
+        int position = mListView.pointToPosition((int) downMotion.getRawX() - listPosition[0], (int) downMotion.getRawY() - listPosition[1]);
+        if (position != AdapterView.INVALID_POSITION) {
+            final MessageInfoHolder message = (MessageInfoHolder) mListView.getItemAtPosition(position);
+            toggleMessageSelect(message);
+        }
+    }
+
     class MessageListAdapter extends BaseAdapter {
         private final List<MessageInfoHolder> mMessages =
                 Collections.synchronizedList(new ArrayList<MessageInfoHolder>());