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// Copyright 2015 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_WS_DISPLAY_MANAGER_DELEGATE_H_
#define COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_
#include "components/mus/public/interfaces/window_tree.mojom.h"
#include "components/mus/ws/ids.h"
namespace cc {
struct SurfaceId;
}
namespace mus {
namespace ws {
class ServerWindow;
// A DisplayManagerDelegate an interface to be implemented by an object that
// manages the lifetime of a DisplayManager, forwards events to the appropriate
// windows, and responses to changes in viewport size.
class DisplayManagerDelegate {
public:
// Returns the root window of this display.
virtual ServerWindow* GetRootWindow() = 0;
// Called when the window managed by the DisplayManager is closed.
virtual void OnDisplayClosed() = 0;
// Called when an event arrives.
virtual void OnEvent(mojom::EventPtr event) = 0;
// Signals that the metrics of this display's viewport has changed.
virtual void OnViewportMetricsChanged(
const mojom::ViewportMetrics& old_metrics,
const mojom::ViewportMetrics& new_metrics) = 0;
virtual void OnTopLevelSurfaceChanged(cc::SurfaceId surface_id) = 0;
// Called when a compositor frame is finished drawing.
virtual void OnCompositorFrameDrawn() = 0;
protected:
virtual ~DisplayManagerDelegate() {}
};
} // namespace ws
} // namespace mus
#endif // COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_
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