thestig@chromium.org
431dc5a0d1
TBR=evmar Review URL: http://codereview.chromium.org/149471 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20406 0039d316-1c4b-4281-b951-d872f2087c98
25 linhas
1.1 KiB
C++
25 linhas
1.1 KiB
C++
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_PAINTING_OBSERVER_H_
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#define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_PAINTING_OBSERVER_H_
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class BackingStore;
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class RenderWidgetHost;
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// This class can be used to observe painting events for a RenderWidgetHost.
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// Its primary goal in Chrome is to allow thumbnails to be generated.
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class RenderWidgetHostPaintingObserver {
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public:
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// Indicates the RenderWidgetHost is about to destroy the backing store. The
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// backing store will still be valid when this call is made.
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virtual void WidgetWillDestroyBackingStore(RenderWidgetHost* widget,
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BackingStore* backing_store) = 0;
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// Indicates that the RenderWidgetHost just updated the backing store.
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virtual void WidgetDidUpdateBackingStore(RenderWidgetHost* widget) = 0;
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};
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#endif // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_PAINTING_OBSERVER_H_
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