Merge "Allow runtime debug logs in TouchExplorer"

import android.graphics.Region;

import android.os.Handler;

import android.util.DisplayMetrics;

import android.util.Log;

import android.util.Slog;

import android.view.Display;

import android.view.InputDevice;

public class TouchExplorer extends BaseEventStreamTransformation

        implements GestureManifold.Listener {

    static final boolean DEBUG = false;

    private static final long LOGGING_FLAGS = FLAGS_GESTURE | FLAGS_INPUT_FILTER;

    // Tag for logging received events.

    private static final String LOG_TAG = "TouchExplorer";

    // To enable these logs, run: 'adb shell setprop log.tag.TouchExplorer DEBUG' (requires restart)

    static final boolean DEBUG = Log.isLoggable(LOG_TAG, Log.DEBUG);

    // The maximum of the cosine between the vectors of two moving

    // pointers so they can be considered moving in the same direction.

    private static final float MAX_DRAGGING_ANGLE_COS = 0.525321989f; // cos(pi/4)