blob: 5b4ba058887c56211c5525a7b49b570bdae13e43 [file] [log] [blame]
// Copyright (c) 2012 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 <stdint.h>
#include <string>
#include "ash/ash_export.h"
#include "ash/display/window_tree_host_manager.h"
#include "base/macros.h"
#include "ui/display/display_observer.h"
#include "ui/display/manager/display_configurator.h"
#include "ui/events/event_handler.h"
#include "ui/views/widget/widget_observer.h"
namespace views {
class Widget;
namespace ash {
// An event filter which handles system level gesture events. Objects of this
// class manage their own lifetime. TODO(estade): find a more descriptive name
// for this class that aligns with its subclasses (or consider using composition
// over inheritance).
class ASH_EXPORT TouchObserverHud
: public ui::EventHandler,
public views::WidgetObserver,
public display::DisplayObserver,
public display::DisplayConfigurator::Observer,
public WindowTreeHostManager::Observer {
// Called to clear touch points and traces from the screen.
virtual void Clear() = 0;
// Removes the HUD from the screen.
void Remove();
int64_t display_id() const { return display_id_; }
// |widget_name| is set on Widget::InitParams::name, and is used purely for
// debugging.
TouchObserverHud(aura::Window* initial_root, const std::string& widget_name);
~TouchObserverHud() override;
virtual void SetHudForRootWindowController(
RootWindowController* controller) = 0;
virtual void UnsetHudForRootWindowController(
RootWindowController* controller) = 0;
views::Widget* widget() { return widget_; }
// ui::EventHandler:
void OnTouchEvent(ui::TouchEvent* event) override = 0;
// views::WidgetObserver:
void OnWidgetDestroying(views::Widget* widget) override;
// display::DisplayObserver:
void OnDisplayRemoved(const display::Display& old_display) override;
void OnDisplayMetricsChanged(const display::Display& display,
uint32_t metrics) override;
// display::DisplayConfigurator::Observer:
void OnDisplayModeChanged(
const display::DisplayConfigurator::DisplayStateList& outputs) override;
// WindowTreeHostManager::Observer:
void OnDisplaysInitialized() override;
void OnDisplayConfigurationChanging() override;
void OnDisplayConfigurationChanged() override;
friend class TouchHudTestBase;
const int64_t display_id_;
aura::Window* root_window_;
views::Widget* widget_;
} // namespace ash