include/wx/msw/custombgwin.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/custombgwin.h
   3 // Purpose:     wxMSW implementation of wxCustomBackgroundWindow
   4 // Author:      Vadim Zeitlin
   5 // Created:     2011-10-10
   6 // RCS-ID:      $Id: wxhead.h,v 1.12 2010-04-22 12:44:51 zeitlin Exp $
   7 // Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_MSW_CUSTOMBGWIN_H_
  12 #define _WX_MSW_CUSTOMBGWIN_H_
  13
  14 #include "wx/bitmap.h"
  15 #include "wx/brush.h"
  16
  17 // ----------------------------------------------------------------------------
  18 // wxCustomBackgroundWindow
  19 // ----------------------------------------------------------------------------
  20
  21 template <class W>
  22 class wxCustomBackgroundWindow : public W,
  23                                  public wxCustomBackgroundWindowBase
  24 {
  25 public:
  26     typedef W BaseWindowClass;
  27
  28     wxCustomBackgroundWindow() { m_backgroundBrush = NULL; }
  29
  30     virtual ~wxCustomBackgroundWindow() { delete m_backgroundBrush; }
  31
  32 protected:
  33     virtual void DoSetBackgroundBitmap(const wxBitmap& bmp)
  34     {
  35         delete m_backgroundBrush;
  36         m_backgroundBrush = bmp.IsOk() ? new wxBrush(bmp) : NULL;
  37
  38         // Our transparent children should use our background if we have it,
  39         // otherwise try to restore m_inheritBgCol to some reasonable value: true
  40         // if we also have non-default background colour or false otherwise.
  41         BaseWindowClass::m_inheritBgCol = bmp.IsOk()
  42                                             || BaseWindowClass::UseBgCol();
  43     }
  44
  45     virtual WXHBRUSH MSWGetCustomBgBrush()
  46     {
  47         if ( m_backgroundBrush )
  48             return (WXHBRUSH)m_backgroundBrush->GetResourceHandle();
  49
  50         return BaseWindowClass::MSWGetCustomBgBrush();
  51     }
  52
  53     wxBrush *m_backgroundBrush;
  54
  55     wxDECLARE_NO_COPY_TEMPLATE_CLASS(wxCustomBackgroundWindow, W);
  56 };
  57
  58 #endif // _WX_MSW_CUSTOMBGWIN_H_