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// 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.
#ifndef SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_
#define SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_
#include <string>
#include "services/service_manager/public/interfaces/interface_provider.mojom.h"
#include "services/ui/public/interfaces/window_tree.mojom.h"
namespace ui {
class Window;
class WindowTreeClient;
// Interface implemented by an application using mus.
class WindowTreeClientDelegate {
public:
// Called when the application implementing this interface is embedded at
// |root|.
// NOTE: this is only invoked if the WindowTreeClient is created with an
// InterfaceRequest.
virtual void OnEmbed(Window* root) = 0;
// Sent when another app is embedded in |root| (one of the roots of the
// connection). Afer this call |root| is deleted. If the associated
// WindowTreeClient was created from a WindowTreeClientRequest then
// OnEmbedRootDestroyed() is called after the window is deleted.
virtual void OnUnembed(Window* root);
// Called when the embed root has been destroyed on the server side (or
// another client was embedded in the same window). This is only called if the
// WindowTreeClient was created from an InterfaceRequest. Generally when this
// is called the delegate should delete the WindowTreeClient.
virtual void OnEmbedRootDestroyed(Window* root) = 0;
// Called when the connection to the window server has been lost. After this
// call the windows are still valid, and you can still do things, but they
// have no real effect. Generally when this is called clients should delete
// the corresponding WindowTreeClient.
virtual void OnLostConnection(WindowTreeClient* client) = 0;
// Called when the WindowTreeClient receives an input event observed via
// StartPointerWatcher(). |target| may be null for events that were sent to
// windows owned by other processes.
virtual void OnPointerEventObserved(const ui::PointerEvent& event,
Window* target) = 0;
protected:
virtual ~WindowTreeClientDelegate() {}
};
} // namespace ui
#endif // SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_