supporting clang memory management annotations

[wxWidgets.git] / include / wx / msw / custombgwin.h

///////////////////////////////////////////////////////////////////////////////
// Name:        wx/msw/custombgwin.h
// Purpose:     wxMSW implementation of wxCustomBackgroundWindow
// Author:      Vadim Zeitlin
// Created:     2011-10-10
// RCS-ID:      $Id: wxhead.h,v 1.12 2010-04-22 12:44:51 zeitlin Exp $
// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_MSW_CUSTOMBGWIN_H_
#define _WX_MSW_CUSTOMBGWIN_H_

#include "wx/bitmap.h"
#include "wx/brush.h"

// ----------------------------------------------------------------------------
// wxCustomBackgroundWindow
// ----------------------------------------------------------------------------

template <class W>
class wxCustomBackgroundWindow : public W,
                                 public wxCustomBackgroundWindowBase
{
public:
    typedef W BaseWindowClass;

    wxCustomBackgroundWindow() { m_backgroundBrush = NULL; }

    virtual ~wxCustomBackgroundWindow() { delete m_backgroundBrush; }

protected:
    virtual void DoSetBackgroundBitmap(const wxBitmap& bmp)
    {
        delete m_backgroundBrush;
        m_backgroundBrush = bmp.IsOk() ? new wxBrush(bmp) : NULL;

        // Our transparent children should use our background if we have it,
        // otherwise try to restore m_inheritBgCol to some reasonable value: true
        // if we also have non-default background colour or false otherwise.
        BaseWindowClass::m_inheritBgCol = bmp.IsOk()
                                            || BaseWindowClass::UseBgCol();
    }

    virtual WXHBRUSH MSWGetCustomBgBrush()
    {
        if ( m_backgroundBrush )
            return (WXHBRUSH)m_backgroundBrush->GetResourceHandle();

        return BaseWindowClass::MSWGetCustomBgBrush();
    }

    wxBrush *m_backgroundBrush;

    wxDECLARE_NO_COPY_TEMPLATE_CLASS(wxCustomBackgroundWindow, W);
};

#endif // _WX_MSW_CUSTOMBGWIN_H_