src/msw/popupwin.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/popupwin.cpp
   3 // Purpose:     implements wxPopupWindow for MSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     08.05.02
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2002 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "popup.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32 #endif //WX_PRECOMP
  33
  34 #if wxUSE_POPUPWIN
  35
  36 #include "wx/popupwin.h"
  37
  38 #include "wx/msw/private.h"     // for GetDesktopWindow()
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxPopupWindow, wxWindow)
  41
  42 // ============================================================================
  43 // implementation
  44 // ============================================================================
  45
  46 bool wxPopupWindow::Create(wxWindow *parent, int flags)
  47 {
  48     return wxPopupWindowBase::Create(parent) &&
  49                wxWindow::Create(parent, -1,
  50                                 wxDefaultPosition, wxDefaultSize,
  51                                 flags | wxPOPUP_WINDOW);
  52 }
  53
  54 void wxPopupWindow::DoGetPosition(int *x, int *y) const
  55 {
  56     // the position of a "top level" window such as this should be in
  57     // screen coordinates, not in the client ones which MSW gives us
  58     // (because we are a child window)
  59     wxPopupWindowBase::DoGetPosition(x, y);
  60
  61     GetParent()->ClientToScreen(x, y);
  62 }
  63
  64 WXDWORD wxPopupWindow::MSWGetStyle(long flags, WXDWORD *exstyle) const
  65 {
  66     // we only honour the border flags, the others don't make sense for us
  67     WXDWORD style = wxWindow::MSWGetStyle(flags & wxBORDER_MASK, exstyle);
  68
  69     if ( exstyle )
  70     {
  71         // a popup window floats on top of everything
  72         *exstyle |= WS_EX_TOPMOST | WS_EX_TOOLWINDOW;
  73     }
  74
  75     return style;
  76 }
  77
  78 WXHWND wxPopupWindow::MSWGetParent() const
  79 {
  80     // we must be a child of the desktop to be able to extend beyond the parent
  81     // window client area (like the comboboxes drop downs do)
  82     //
  83     // NB: alternative implementation would be to use WS_POPUP instead of
  84     //     WS_CHILD but then showing a popup would deactivate the parent which
  85     //     is ugly and working around this, although possible, is even more
  86     //     ugly
  87     // GetDesktopWindow() is not always supported on WinCE, and if
  88     // it is, it often returns NULL.
  89 #ifdef __WXWINCE__
  90     return 0;
  91 #else
  92     return (WXHWND)::GetDesktopWindow();
  93 #endif
  94 }
  95
  96 bool wxPopupWindow::Show(bool show)
  97 {
  98     if ( !wxWindowMSW::Show(show) )
  99         return FALSE;
 100
 101     if ( show )
 102     {
 103         // raise to top of z order
 104         if (!::SetWindowPos(GetHwnd(), HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE))
 105         {
 106             wxLogLastError(_T("SetWindowPos"));
 107         }
 108     }
 109
 110     return TRUE;
 111 }
 112
 113 #endif // #if wxUSE_POPUPWIN
 114