Merge "Revert "Use GestureDetector in WorkspaceTouchListener"" into ub-launcher3-master

import android.view.HapticFeedbackConstants;

import android.view.MotionEvent;

import android.view.View;

import android.view.GestureDetector;

import android.view.View.OnTouchListener;

import android.view.ViewConfiguration;

/**

 * Helper class to handle touch on empty space in workspace and show options popup on long press

 */

public class WorkspaceTouchListener extends GestureDetector.SimpleOnGestureListener implements OnTouchListener {

public class WorkspaceTouchListener implements OnTouchListener, Runnable {

    /**

     * STATE_PENDING_PARENT_INFORM is the state between longPress performed & the next motionEvent.

    private int mLongPressState = STATE_CANCELLED;

    private final GestureDetector mGestureDetector;

    public WorkspaceTouchListener(Launcher launcher, Workspace workspace) {

        mLauncher = launcher;

        mWorkspace = workspace;

        // Use twice the touch slop as we are looking for long press which is more

        // likely to cause movement.

        mTouchSlop = 2 * ViewConfiguration.get(launcher).getScaledTouchSlop();

        mGestureDetector = new GestureDetector(workspace.getContext(), this);

    }

    @Override

    public boolean onTouch(View view, MotionEvent ev) {

        mGestureDetector.onTouchEvent(ev);

        int action = ev.getActionMasked();

        if (action == ACTION_DOWN) {

            // Check if we can handle long press.

            if (handleLongPress) {

                mLongPressState = STATE_REQUESTED;

                mTouchDownPoint.set(ev.getX(), ev.getY());

                mWorkspace.postDelayed(this, getLongPressTimeout());

            }

            mWorkspace.onTouchEvent(ev);

    }

    private void cancelLongPress() {

        mWorkspace.removeCallbacks(this);

        mLongPressState = STATE_CANCELLED;

    }

    @Override

    public void onLongPress(MotionEvent event) {

    public void run() {

        if (mLongPressState == STATE_REQUESTED) {

            if (canHandleLongPress()) {

                mLongPressState = STATE_PENDING_PARENT_INFORM;