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// Copyright (c) 2006-2008 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_HWND_PHOTOBOOTH_H__
#define CHROME_BROWSER_HWND_PHOTOBOOTH_H__
#include "base/basictypes.h"
#include "base/gfx/rect.h"
class ChromeCanvas;
namespace ChromeViews {
class HWNDViewContainer;
}
///////////////////////////////////////////////////////////////////////////////
// HWNDPhotobooth
//
// An object that a HWND "steps into" to have its picture taken. This is used
// to generate a full size screen shot of the contents of a HWND including
// any child windows.
//
// Implementation note: This causes the HWND to be re-parented to a mostly
// off-screen layered window.
//
class HWNDPhotobooth {
public:
// Creates the photo booth. Constructs a nearly off-screen window, parents
// the HWND, then shows it. The caller is responsible for destroying this
// window, since the photo-booth will detach it before it is destroyed.
// |canvas| is a canvas to paint the contents into, and dest_bounds is the
// target area in |canvas| to which painted contents will be clipped.
explicit HWNDPhotobooth(HWND initial_hwnd);
// Destroys the photo booth window.
virtual ~HWNDPhotobooth();
// Replaces the HWND in the photo booth with the specified one. The caller is
// responsible for destroying this HWND since it will be detached from the
// capture window before the capture window is destroyed.
void ReplaceHWND(HWND new_hwnd);
// Paints the current display image of the window into |canvas|, clipped to
// |target_bounds|.
void PaintScreenshotIntoCanvas(ChromeCanvas* canvas,
const gfx::Rect& target_bounds);
private:
// Creates a mostly off-screen window to contain the HWND to be captured.
void CreateCaptureWindow(HWND initial_hwnd);
// The nearly off-screen photo-booth layered window used to hold the HWND.
ChromeViews::HWNDViewContainer* capture_window_;
// The current HWND being captured.
HWND current_hwnd_;
DISALLOW_EVIL_CONSTRUCTORS(HWNDPhotobooth);
};
#endif // #ifndef CHROME_BROWSER_HWND_PHOTOBOOTH_H__
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