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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_VIEW_TREE_HOST_DELEGATE_H_
#define COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_
namespace view_manager {
class ViewTreeImpl;
// A ViewTreeHostDelegate interface is implemented by an object that
// has the ViewTreeImpl that is associated with the ViewTreeHostImpl that holds
// a pointer to this object. Typically, a ViewTreeHostDelegate will also manage
// the lifetime of the ViewTreeHostImpl and will delete the object when it gets
// informed of when the Display of the root is closed.
class ViewTreeHostDelegate {
public:
// Called when the window associated with the root is completely initialized
// (i.e. the ViewportMetrics for the display is known).
virtual void OnDisplayInitialized() = 0;
// Called when the window associated with the root is closed.
virtual void OnDisplayClosed() = 0;
// Returns the ViewTreeImpl associated with the delegate.
virtual ViewTreeImpl* GetViewTree() = 0;
protected:
virtual ~ViewTreeHostDelegate() {}
};
} // namespace view_manager
#endif // COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_
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