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