// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.content_public.browser;
/**
* A class that is notified of events and state changes related to gesture processing from
* the ContentViewCore.
*/
public class GestureStateListener {
/**
* Called when the pinch gesture starts.
*/
public void onPinchStarted() {}
/**
* Called when the pinch gesture ends.
*/
public void onPinchEnded() {}
/**
* Called when a fling starts.
*/
public void onFlingStartGesture(int vx, int vy, int scrollOffsetY, int scrollExtentY) {}
/**
* Called when a fling is cancelled.
*/
public void onFlingCancelGesture() {}
/**
* Called when a fling has ended.
*/
public void onFlingEndGesture(int scrollOffsetY, int scrollExtentY) {}
/**
* Called when a fling event was not handled by the renderer.
*/
public void onUnhandledFlingStartEvent(int vx, int vy) {}
/**
* Called to indicate that a scroll update gesture had been consumed by the page.
* This callback is called whenever any layer is scrolled (like a frame or div). It is
* not called when a JS touch handler consumes the event (preventDefault), it is not called
* for JS-initiated scrolling.
*/
public void onScrollUpdateGestureConsumed() {}
/*
* Called when a scroll gesture has started.
*/
public void onScrollStarted(int scrollOffsetY, int scrollExtentY) {}
/*
* Called when a scroll gesture has stopped.
*/
public void onScrollEnded(int scrollOffsetY, int scrollExtentY) {}
/*
* Called when the scroll offsets or extents may have changed.
*/
public void onScrollOffsetOrExtentChanged(int scrollOffsetY, int scrollExtentY) {}
}