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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28 #include "wx/defs.h"
  29 #endif //WX_PRECOMP
  30
  31 #if wxUSE_POPUPWIN
  32
  33 #include "wx/popupwin.h"
  34
  35 #include "wx/msw/private.h"     // for GetDesktopWindow()
  36
  37 // ============================================================================
  38 // implementation
  39 // ============================================================================
  40
  41 bool wxPopupWindow::Create(wxWindow *parent, int flags)
  42 {
  43     // popup windows are created hidden by default
  44     Hide();
  45
  46     return wxPopupWindowBase::Create(parent) &&
  47                wxWindow::Create(parent, wxID_ANY,
  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     // GetDesktopWindow() is not always supported on WinCE, and if
  86     // it is, it often returns NULL.
  87 #ifdef __WXWINCE__
  88     return 0;
  89 #else
  90     return (WXHWND)::GetDesktopWindow();
  91 #endif
  92 }
  93
  94 bool wxPopupWindow::Show(bool show)
  95 {
  96     if ( !wxWindowMSW::Show(show) )
  97         return false;
  98
  99     if ( show )
 100     {
 101         // raise to top of z order
 102         if (!::SetWindowPos(GetHwnd(), HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE))
 103         {
 104             wxLogLastError(_T("SetWindowPos"));
 105         }
 106
 107         // and set it as the foreground window so the mouse can be captured
 108         ::SetForegroundWindow(GetHwnd());
 109     }
 110
 111     return true;
 112 }
 113
 114 #endif // #if wxUSE_POPUPWIN
 115