blob: ee48a004bd1540179ef98e05226e7c19b7cd9fb6 [file] [log] [blame]
// Copyright 2018 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.
#include "ui/events/events_export.h"
namespace ui {
class DragEventAndroid;
class GestureEventAndroid;
class KeyEventAndroid;
class MotionEventAndroid;
// Dispatches events to appropriate targets. The default implementations of
// all of the specific handlers do nothing. Implementations should set
// themselves to the ViewAndroid in the view tree to get the calls routed.
// Use bool return type to stop propagating the call i.e. overriden method
// should return true to indicate that the event was handled and stop
// the processing.
class EVENTS_EXPORT EventHandlerAndroid {
virtual bool OnDragEvent(const DragEventAndroid& event);
virtual bool OnTouchEvent(const MotionEventAndroid& event);
virtual bool OnMouseEvent(const MotionEventAndroid& event);
virtual bool OnMouseWheelEvent(const MotionEventAndroid& event);
virtual bool OnGestureEvent(const GestureEventAndroid& event);
virtual void OnSizeChanged();
virtual void OnPhysicalBackingSizeChanged();
virtual bool OnGenericMotionEvent(const MotionEventAndroid& event);
virtual bool OnKeyUp(const KeyEventAndroid& event);
virtual bool DispatchKeyEvent(const KeyEventAndroid& event);
virtual bool ScrollBy(float delta_x, float delta_y);
virtual bool ScrollTo(float x, float y);
} // namespace ui