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     // popup windows are created hidden by default
  50     Hide();
  51
  52     return wxPopupWindowBase::Create(parent) &&
  53                wxWindow::Create(parent, wxID_ANY,
  54                                 wxDefaultPosition, wxDefaultSize,
  55                                 flags | wxPOPUP_WINDOW);
  56 }
  57
  58 void wxPopupWindow::DoGetPosition(int *x, int *y) const
  59 {
  60     // the position of a "top level" window such as this should be in
  61     // screen coordinates, not in the client ones which MSW gives us
  62     // (because we are a child window)
  63     wxPopupWindowBase::DoGetPosition(x, y);
  64
  65     GetParent()->ClientToScreen(x, y);
  66 }
  67
  68 WXDWORD wxPopupWindow::MSWGetStyle(long flags, WXDWORD *exstyle) const
  69 {
  70     // we only honour the border flags, the others don't make sense for us
  71     WXDWORD style = wxWindow::MSWGetStyle(flags & wxBORDER_MASK, exstyle);
  72
  73     if ( exstyle )
  74     {
  75         // a popup window floats on top of everything
  76         *exstyle |= WS_EX_TOPMOST | WS_EX_TOOLWINDOW;
  77     }
  78
  79     return style;
  80 }
  81
  82 WXHWND wxPopupWindow::MSWGetParent() const
  83 {
  84     // we must be a child of the desktop to be able to extend beyond the parent
  85     // window client area (like the comboboxes drop downs do)
  86     //
  87     // NB: alternative implementation would be to use WS_POPUP instead of
  88     //     WS_CHILD but then showing a popup would deactivate the parent which
  89     //     is ugly and working around this, although possible, is even more
  90     //     ugly
  91     // GetDesktopWindow() is not always supported on WinCE, and if
  92     // it is, it often returns NULL.
  93 #ifdef __WXWINCE__
  94     return 0;
  95 #else
  96     return (WXHWND)::GetDesktopWindow();
  97 #endif
  98 }
  99
 100 bool wxPopupWindow::Show(bool show)
 101 {
 102     if ( !wxWindowMSW::Show(show) )
 103         return false;
 104
 105     if ( show )
 106     {
 107         // raise to top of z order
 108         if (!::SetWindowPos(GetHwnd(), HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE))
 109         {
 110             wxLogLastError(_T("SetWindowPos"));
 111         }
 112     }
 113
 114     return true;
 115 }
 116
 117 #endif // #if wxUSE_POPUPWIN
 118