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44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
// Copyright (c) 2011 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 BASE_WIN_SCOPED_SELECT_OBJECT_H_
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#define BASE_WIN_SCOPED_SELECT_OBJECT_H_
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#include <windows.h>
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#include "base/logging.h"
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#include "base/macros.h"
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namespace base {
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namespace win {
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// Helper class for deselecting object from DC.
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class ScopedSelectObject {
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public:
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ScopedSelectObject(HDC hdc, HGDIOBJ object)
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: hdc_(hdc),
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oldobj_(SelectObject(hdc, object)) {
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DCHECK(hdc_);
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DCHECK(object);
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DCHECK(oldobj_ != NULL && oldobj_ != HGDI_ERROR);
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}
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~ScopedSelectObject() {
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HGDIOBJ object = SelectObject(hdc_, oldobj_);
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DCHECK((GetObjectType(oldobj_) != OBJ_REGION && object != NULL) ||
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(GetObjectType(oldobj_) == OBJ_REGION && object != HGDI_ERROR));
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}
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private:
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HDC hdc_;
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HGDIOBJ oldobj_;
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DISALLOW_COPY_AND_ASSIGN(ScopedSelectObject);
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};
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} // namespace win
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} // namespace base
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#endif // BASE_WIN_SCOPED_SELECT_OBJECT_H_
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