src/msw/nativewin.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/nativewin.cpp
   3 // Purpose:     wxNativeWindow implementation
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-03-05
   6 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwindows.org>
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // ============================================================================
  11 // declarations
  12 // ============================================================================
  13
  14 // ----------------------------------------------------------------------------
  15 // headers
  16 // ----------------------------------------------------------------------------
  17
  18 // for compilers that support precompilation, includes "wx.h".
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22     #pragma hdrstop
  23 #endif
  24
  25 #ifndef WX_PRECOMP
  26 #endif // WX_PRECOMP
  27
  28 #include "wx/nativewin.h"
  29 #include "wx/msw/private.h"
  30
  31 // ============================================================================
  32 // implementation
  33 // ============================================================================
  34
  35 bool wxNativeContainerWindow::Create(wxNativeContainerWindowHandle hwnd)
  36 {
  37     if ( !::IsWindow(hwnd) )
  38     {
  39         // strictly speaking, the fact that IsWindow() returns true doesn't
  40         // mean that the window handle is valid -- it could be being deleted
  41         // right now, for example
  42         //
  43         // but if it returns false, the handle is definitely invalid
  44         return false;
  45     }
  46
  47     // make this HWND really a wxWindow
  48     SubclassWin(hwnd);
  49
  50     // inherit the other attributes we can from the native HWND
  51     AdoptAttributesFromHWND();
  52
  53     return true;
  54 }
  55
  56 bool wxNativeContainerWindow::IsShown() const
  57 {
  58     return (IsWindowVisible(static_cast<HWND>(m_hWnd)) != 0);
  59 }
  60
  61 void wxNativeContainerWindow::OnNativeDestroyed()
  62 {
  63     // don't use Close() or even Destroy() here, we really don't want to keep
  64     // an object using a no more existing HWND around for longer than necessary
  65     delete this;
  66 }
  67
  68 WXLRESULT wxNativeContainerWindow::MSWWindowProc(WXUINT nMsg,
  69                                                  WXWPARAM wParam,
  70                                                  WXLPARAM lParam)
  71 {
  72     if ( nMsg == WM_DESTROY )
  73     {
  74         OnNativeDestroyed();
  75
  76         return 0;
  77     }
  78
  79     return wxTopLevelWindow::MSWWindowProc(nMsg, wParam, lParam);
  80 }
  81
  82 wxNativeContainerWindow::~wxNativeContainerWindow()
  83 {
  84     // prevent the base class dtor from destroying the window, it doesn't
  85     // belong to us so we should leave it alive
  86     DissociateHandle();
  87 }
  88