11320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// Copyright 2014 The Chromium Authors. All rights reserved. 21320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// Use of this source code is governed by a BSD-style license that can be 31320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// found in the LICENSE file. 41320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 51320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#ifndef UI_EVENTS_OZONE_EVENTS_OZONE_H_ 61320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#define UI_EVENTS_OZONE_EVENTS_OZONE_H_ 71320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 81320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "base/callback.h" 91320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "base/event_types.h" 101320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "ui/events/events_export.h" 111320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 121320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tuccinamespace ui { 131320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 141320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciclass Event; 151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// Wrap a "native" ui::Event in another ui::Event & dispatch it. 171320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 181320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// This is really unfortunate, but exists for two reasons: 191320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 1. Some of the ui::Event constructors depend on global state that 211320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// is only used when building from a "native" event. For example: 221320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// last_click_event_ is used when constructing MouseEvent from 231320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// NativeEvent to determine click count. 241320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 251320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 2. Events contain a reference to a "native event", which some code 261320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// depends on. The ui::Event might get mutated during dispatch, but 271320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// the native event won't. Some code depends on the fact that the 281320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// "native" version of the event is unmodified. 291320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 301320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// We are trying to fix both of these issues, but in the meantime we 311320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// define NativeEvent == ui::Event. 321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 331320f92c476a1ad9d19dba2a48c72b75566198e9Primiano TucciEVENTS_EXPORT void DispatchEventFromNativeUiEvent( 341320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci const base::NativeEvent& native_event, 351320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci base::Callback<void(ui::Event*)> callback); 361320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 371320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} // namespace ui 381320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 391320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#endif // UI_EVENTS_OZONE_EVENTS_OZONE_H_ 40