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 // ============================================================================
  42 // implementation
  43 // ============================================================================
  44
  45 bool wxPopupWindow::Create(wxWindow *parent, int flags)
  46 {
  47     // popup windows are created hidden by default
  48     Hide();
  49
  50     return wxPopupWindowBase::Create(parent) &&
  51                wxWindow::Create(parent, wxID_ANY,
  52                                 wxDefaultPosition, wxDefaultSize,
  53                                 flags | wxPOPUP_WINDOW);
  54 }
  55
  56 void wxPopupWindow::DoGetPosition(int *x, int *y) const
  57 {
  58     // the position of a "top level" window such as this should be in
  59     // screen coordinates, not in the client ones which MSW gives us
  60     // (because we are a child window)
  61     wxPopupWindowBase::DoGetPosition(x, y);
  62
  63     GetParent()->ClientToScreen(x, y);
  64 }
  65
  66 WXDWORD wxPopupWindow::MSWGetStyle(long flags, WXDWORD *exstyle) const
  67 {
  68     // we only honour the border flags, the others don't make sense for us
  69     WXDWORD style = wxWindow::MSWGetStyle(flags & wxBORDER_MASK, exstyle);
  70
  71     if ( exstyle )
  72     {
  73         // a popup window floats on top of everything
  74         *exstyle |= WS_EX_TOPMOST | WS_EX_TOOLWINDOW;
  75     }
  76
  77     return style;
  78 }
  79
  80 WXHWND wxPopupWindow::MSWGetParent() const
  81 {
  82     // we must be a child of the desktop to be able to extend beyond the parent
  83     // window client area (like the comboboxes drop downs do)
  84     //
  85     // NB: alternative implementation would be to use WS_POPUP instead of
  86     //     WS_CHILD but then showing a popup would deactivate the parent which
  87     //     is ugly and working around this, although possible, is even more
  88     //     ugly
  89     // GetDesktopWindow() is not always supported on WinCE, and if
  90     // it is, it often returns NULL.
  91 #ifdef __WXWINCE__
  92     return 0;
  93 #else
  94     return (WXHWND)::GetDesktopWindow();
  95 #endif
  96 }
  97
  98 bool wxPopupWindow::Show(bool show)
  99 {
 100     if ( !wxWindowMSW::Show(show) )
 101         return false;
 102
 103     if ( show )
 104     {
 105         // raise to top of z order
 106         if (!::SetWindowPos(GetHwnd(), HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE))
 107         {
 108             wxLogLastError(_T("SetWindowPos"));
 109         }
 110
 111         // and set it as the foreground window so the mouse can be captured
 112         ::SetForegroundWindow(GetHwnd());
 113     }
 114
 115     return true;
 116 }
 117
 118 #endif // #if wxUSE_POPUPWIN
 119