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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 COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_DELEGATE_H_
#define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_DELEGATE_H_
#include <string>
#include "components/mus/public/interfaces/window_tree.mojom.h"
#include "mojo/application/public/interfaces/service_provider.mojom.h"
#include "mojo/services/network/public/interfaces/url_loader.mojom.h"
namespace mus {
class Window;
class WindowTreeConnection;
// Interface implemented by an application using the window manager.
//
// Each call to OnEmbed() results in a new WindowTreeConnection and new root
// Window.
// WindowTreeConnection is deleted by any of the following:
// . If the root of the connection is destroyed. This happens if the owner
// of the root Embed()s another app in root, or root is explicitly deleted.
// . The connection to the window manager is lost.
// . Explicitly by way of calling delete.
//
// When the WindowTreeConnection is deleted all windows are deleted (and
// observers notified). This is followed by notifying the delegate by way of
// OnConnectionLost().
class WindowTreeDelegate {
public:
// Called when the application implementing this interface is embedded at
// |root|.
virtual void OnEmbed(Window* root) = 0;
// Sent when another app is embedded in the same Window as this connection.
// Subsequently the root Window and this object are destroyed (observers are
// notified appropriately).
virtual void OnUnembed();
// Called from the destructor of WindowTreeConnection after all the Windows
// have been destroyed. |connection| is no longer valid after this call.
virtual void OnConnectionLost(WindowTreeConnection* connection) = 0;
protected:
virtual ~WindowTreeDelegate() {}
};
} // namespace mus
#endif // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_DELEGATE_H_
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