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 #ifdef __GNUG__
  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 #include "wx/popupwin.h"
  35
  36 #include "wx/msw/private.h"     // for GetDesktopWindow()
  37
  38 IMPLEMENT_DYNAMIC_CLASS(wxPopupWindow, wxWindow)
  39
  40 // ============================================================================
  41 // implementation
  42 // ============================================================================
  43
  44 bool wxPopupWindow::Create(wxWindow *parent, int flags)
  45 {
  46     return wxPopupWindowBase::Create(parent) &&
  47                wxWindow::Create(parent, -1,
  48                                 wxDefaultPosition, wxDefaultSize,
  49                                 flags | wxPOPUP_WINDOW);
  50 }
  51
  52 void wxPopupWindow::DoGetPosition(int *x, int *y) const
  53 {
  54     // the position of a "top level" window such as this should be in
  55     // screen coordinates, not in the client ones which MSW gives us
  56     // (because we are a child window)
  57     wxPopupWindowBase::DoGetPosition(x, y);
  58
  59     GetParent()->ClientToScreen(x, y);
  60 }
  61
  62 WXDWORD wxPopupWindow::MSWGetStyle(long flags, WXDWORD *exstyle) const
  63 {
  64     // we only honour the border flags, the others don't make sense for us
  65     WXDWORD style = wxWindow::MSWGetStyle(flags & wxBORDER_MASK, exstyle);
  66
  67     if ( exstyle )
  68     {
  69         // a popup window floats on top of everything
  70         *exstyle |= WS_EX_TOPMOST | WS_EX_TOOLWINDOW;
  71     }
  72
  73     return style;
  74 }
  75
  76 WXHWND wxPopupWindow::MSWGetParent() const
  77 {
  78     // we must be a child of the desktop to be able to extend beyond the parent
  79     // window client area (like the comboboxes drop downs do)
  80     //
  81     // NB: alternative implementation would be to use WS_POPUP instead of
  82     //     WS_CHILD but then showing a popup would deactivate the parent which
  83     //     is ugly and working around this, although possible, is even more
  84     //     ugly
  85     return (WXHWND)::GetDesktopWindow();
  86 }
  87