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