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 #include "wx/defs.h"
  33 #endif //WX_PRECOMP
  34
  35 #if wxUSE_POPUPWIN
  36
  37 #include "wx/popupwin.h"
  38
  39 #include "wx/msw/private.h"     // for GetDesktopWindow()
  40
  41 IMPLEMENT_DYNAMIC_CLASS(wxPopupWindow, wxWindow)
  42
  43 // ============================================================================
  44 // implementation
  45 // ============================================================================
  46
  47 bool wxPopupWindow::Create(wxWindow *parent, int flags)
  48 {
  49     return wxPopupWindowBase::Create(parent) &&
  50                wxWindow::Create(parent, -1,
  51                                 wxDefaultPosition, wxDefaultSize,
  52                                 flags | wxPOPUP_WINDOW);
  53 }
  54
  55 void wxPopupWindow::DoGetPosition(int *x, int *y) const
  56 {
  57     // the position of a "top level" window such as this should be in
  58     // screen coordinates, not in the client ones which MSW gives us
  59     // (because we are a child window)
  60     wxPopupWindowBase::DoGetPosition(x, y);
  61
  62     GetParent()->ClientToScreen(x, y);
  63 }
  64
  65 WXDWORD wxPopupWindow::MSWGetStyle(long flags, WXDWORD *exstyle) const
  66 {
  67     // we only honour the border flags, the others don't make sense for us
  68     WXDWORD style = wxWindow::MSWGetStyle(flags & wxBORDER_MASK, exstyle);
  69
  70     if ( exstyle )
  71     {
  72         // a popup window floats on top of everything
  73         *exstyle |= WS_EX_TOPMOST | WS_EX_TOOLWINDOW;
  74     }
  75
  76     return style;
  77 }
  78
  79 WXHWND wxPopupWindow::MSWGetParent() const
  80 {
  81     // we must be a child of the desktop to be able to extend beyond the parent
  82     // window client area (like the comboboxes drop downs do)
  83     //
  84     // NB: alternative implementation would be to use WS_POPUP instead of
  85     //     WS_CHILD but then showing a popup would deactivate the parent which
  86     //     is ugly and working around this, although possible, is even more
  87     //     ugly
  88     // GetDesktopWindow() is not always supported on WinCE, and if
  89     // it is, it often returns NULL.
  90 #ifdef __WXWINCE__
  91     return 0;
  92 #else
  93     return (WXHWND)::GetDesktopWindow();
  94 #endif
  95 }
  96
  97 bool wxPopupWindow::Show(bool show)
  98 {
  99     if ( !wxWindowMSW::Show(show) )
 100         return FALSE;
 101
 102     if ( show )
 103     {
 104         // raise to top of z order
 105         if (!::SetWindowPos(GetHwnd(), HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE))
 106         {
 107             wxLogLastError(_T("SetWindowPos"));
 108         }
 109     }
 110
 111     return TRUE;
 112 }
 113
 114 #endif // #if wxUSE_POPUPWIN
 115