/* Copyright (C) 2020-2024 Petr Vaněk
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.util;
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import android.content.Context;
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import android.view.GestureDetector;
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import android.view.MotionEvent;
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import android.view.View;
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//simple swipe detector based on GestureDetector, inspired by https://stackoverflow.com/a/19506010
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public class SwipeEvents implements View.OnTouchListener {
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private final GestureDetector gestureDetector;
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public SwipeEvents(Context context) {
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gestureDetector = new GestureDetector(context, new GestureListener());
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}
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public void onSwipeLeft() {
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}
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public void onSwipeRight() {
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}
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public boolean onTouch(View v, MotionEvent event) {
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return gestureDetector.onTouchEvent(event);
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}
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private final class GestureListener extends GestureDetector.SimpleOnGestureListener {
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private static final int SWIPE_DISTANCE_THRESHOLD = 100;
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private static final int SWIPE_VELOCITY_THRESHOLD = 100;
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@Override
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public boolean onDown(MotionEvent e) {
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return false;
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}
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@Override
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public boolean onSingleTapConfirmed(MotionEvent e) {
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return false;
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}
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@Override
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public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
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if (e1 == null || e2 == null){
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return false;
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}
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float distanceX = e2.getX() - e1.getX();
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float distanceY = e2.getY() - e1.getY();
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if (Math.abs(distanceX) > Math.abs(distanceY) && Math.abs(distanceX) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
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if (distanceX > 0)
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onSwipeRight();
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else
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onSwipeLeft();
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return true;
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}
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return false;
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}
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}
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}
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