78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
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// Copyright (c) 2010 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_GDI_OBJECT_H_
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#define BASE_WIN_SCOPED_GDI_OBJECT_H_
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#include <windows.h>
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#include "base/basictypes.h"
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#include "base/logging.h"
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namespace base {
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namespace win {
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// Like ScopedHandle but for GDI objects.
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template<class T>
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class ScopedGDIObject {
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public:
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ScopedGDIObject() : object_(NULL) {}
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explicit ScopedGDIObject(T object) : object_(object) {}
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~ScopedGDIObject() {
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Close();
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}
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T Get() {
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return object_;
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}
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void Set(T object) {
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if (object_ && object != object_)
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Close();
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object_ = object;
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}
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ScopedGDIObject& operator=(T object) {
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Set(object);
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return *this;
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}
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T release() {
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T object = object_;
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object_ = NULL;
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return object;
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}
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operator T() { return object_; }
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private:
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void Close() {
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if (object_)
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DeleteObject(object_);
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}
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T object_;
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DISALLOW_COPY_AND_ASSIGN(ScopedGDIObject);
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};
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// An explicit specialization for HICON because we have to call DestroyIcon()
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// instead of DeleteObject() for HICON.
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template<>
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void ScopedGDIObject<HICON>::Close() {
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if (object_)
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DestroyIcon(object_);
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}
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// Typedefs for some common use cases.
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typedef ScopedGDIObject<HBITMAP> ScopedBitmap;
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typedef ScopedGDIObject<HRGN> ScopedRegion;
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typedef ScopedGDIObject<HFONT> ScopedHFONT;
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typedef ScopedGDIObject<HICON> ScopedHICON;
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} // namespace win
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} // namespace base
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#endif // BASE_WIN_SCOPED_GDI_OBJECT_H_
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