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// Copyright (c) 2011 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 CHROME_BROWSER_UI_GTK_TABSTRIP_ORIGIN_PROVIDER_H_
#define CHROME_BROWSER_UI_GTK_TABSTRIP_ORIGIN_PROVIDER_H_
#pragma once
namespace gfx{
class Point;
}
// Abstract interface that provides an offset of a widget. Many pieces of the
// UI don't need the full BrowserWindowGtk, but just need information about
// it's position relative to the tabstrip to draw correctly. This interface
// exists to make it easier to test piece by piece.
class TabstripOriginProvider {
public:
virtual ~TabstripOriginProvider() { }
// Return the origin of the tab strip in coordinates relative to where we
// start drawing the background theme image. This is the x coordinate of
// the origin of the GdkWindow of widget(), but the y coordinate of the origin
// of widget() itself.
// Used to help other widgets draw their background relative to the tabstrip.
// Should only be called after both the tabstrip and |widget| have been
// allocated.
virtual gfx::Point GetTabStripOriginForWidget(GtkWidget* widget) = 0;
};
#endif // CHROME_BROWSER_UI_GTK_TABSTRIP_ORIGIN_PROVIDER_H_
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