Merge "[PB3] Simplify storage"

    // What to display in the "status" field when we receive unknown data as a status from

    // the content provider. Empty string sounds sensible.

    static final private String NO_STATUS_MESSAGE = "";

    static final private int NOT_AN_INDEX = -1;

    /// Actions

    static final private int ACTION_UNKNOWN = 0;

    static final private int ANIMATION_IN = 1;

    static final private int ANIMATION_OUT = 2;

    private static int sLastClickedIndex = NOT_AN_INDEX;

    private static String sLastClickedWordlistId = null;

    private final OnWordListPreferenceClick mPreferenceClickHandler =

            new OnWordListPreferenceClick();

    private class OnWordListPreferenceClick implements View.OnClickListener {

        @Override

        public void onClick(final View v) {

            final Button button = (Button)v.findViewById(R.id.wordlist_button);

            // Note : v is the preference view

            final ViewParent parent = v.getParent();

            // Just in case something changed in the framework, test for the concrete class

            if (!(parent instanceof ListView)) return;

            final ListView listView = (ListView)parent;

            final int myIndex = listView.indexOfChild(v) + listView.getFirstVisiblePosition();

            if (NOT_AN_INDEX != sLastClickedIndex) {

                // If another button is showing, hide it

                animateButton(getButtonForIndex(listView, sLastClickedIndex), ANIMATION_OUT);

            }

            final int indexToOpen;

            if (sLastClickedWordlistId == mWordlistId) {

                // This button was being shown. Clear last state to record that there isn't a

                // displayed button any more.

                sLastClickedIndex = NOT_AN_INDEX;

                // displayed button any more, and note that we don't want to open any button.

                sLastClickedWordlistId = null;

                indexToOpen = -1;

            } else {

                // This button was not being shown. Show it and mark it as the latest selected

                // button.

                animateButton(button, ANIMATION_IN);

                sLastClickedIndex = myIndex;

                // This button was not being shown. Mark it as the latest selected button, and

                // remember the index of this child as the one to open in the following loop.

                sLastClickedWordlistId = mWordlistId;

                indexToOpen = listView.indexOfChild(v);

            }

            final int lastDisplayedIndex =

                    listView.getLastVisiblePosition() - listView.getFirstVisiblePosition();

            // The "lastDisplayedIndex" is actually displayed, hence the <=

            for (int i = 0; i <= lastDisplayedIndex; ++i) {

                final Button button =

                        (Button)listView.getChildAt(i).findViewById(R.id.wordlist_button);

                if (i == indexToOpen) {

                    animateButton(button, ANIMATION_IN);

                } else {

                    animateButton(button, ANIMATION_OUT);

                }

            }

    private Button getButtonForIndex(final ListView listView, final int index) {

        final int indexInChildren = index - listView.getFirstVisiblePosition();

        if (indexInChildren < 0 || index > listView.getLastVisiblePosition()) {

            // The view is offscreen.

            return null;

        }

        return (Button)listView.getChildAt(indexInChildren).findViewById(R.id.wordlist_button);

    }

    private void animateButton(final Button button, final int direction) {