src/msw/popupwin.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/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 #if wxUSE_POPUPWIN
  28
  29 #ifndef WX_PRECOMP
  30 #endif //WX_PRECOMP
  31
  32 #include "wx/popupwin.h"
  33
  34 #include "wx/msw/private.h"     // for GetDesktopWindow()
  35
  36 // ============================================================================
  37 // implementation
  38 // ============================================================================
  39
  40 bool wxPopupWindow::Create(wxWindow *parent, int flags)
  41 {
  42     // popup windows are created hidden by default
  43     Hide();
  44
  45     return wxPopupWindowBase::Create(parent) &&
  46                wxWindow::Create(parent, wxID_ANY,
  47                                 wxDefaultPosition, wxDefaultSize,
  48                                 flags | wxPOPUP_WINDOW);
  49 }
  50
  51 void wxPopupWindow::DoGetPosition(int *x, int *y) const
  52 {
  53     // the position of a "top level" window such as this should be in
  54     // screen coordinates, not in the client ones which MSW gives us
  55     // (because we are a child window)
  56     wxPopupWindowBase::DoGetPosition(x, y);
  57
  58     GetParent()->ClientToScreen(x, y);
  59 }
  60
  61 WXDWORD wxPopupWindow::MSWGetStyle(long flags, WXDWORD *exstyle) const
  62 {
  63     // we only honour the border flags, the others don't make sense for us
  64     WXDWORD style = wxWindow::MSWGetStyle(flags & wxBORDER_MASK, exstyle);
  65
  66     if ( exstyle )
  67     {
  68         // a popup window floats on top of everything
  69         *exstyle |= WS_EX_TOPMOST | WS_EX_TOOLWINDOW;
  70     }
  71
  72     return style;
  73 }
  74
  75 WXHWND wxPopupWindow::MSWGetParent() const
  76 {
  77     // we must be a child of the desktop to be able to extend beyond the parent
  78     // window client area (like the comboboxes drop downs do)
  79     //
  80     // NB: alternative implementation would be to use WS_POPUP instead of
  81     //     WS_CHILD but then showing a popup would deactivate the parent which
  82     //     is ugly and working around this, although possible, is even more
  83     //     ugly
  84     // GetDesktopWindow() is not always supported on WinCE, and if
  85     // it is, it often returns NULL.
  86 #ifdef __WXWINCE__
  87     return 0;
  88 #else
  89     return (WXHWND)::GetDesktopWindow();
  90 #endif
  91 }
  92
  93 bool wxPopupWindow::Show(bool show)
  94 {
  95     if ( !wxWindowMSW::Show(show) )
  96         return false;
  97
  98     if ( show )
  99     {
 100         // raise to top of z order
 101         if (!::SetWindowPos(GetHwnd(), HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE))
 102         {
 103             wxLogLastError(wxT("SetWindowPos"));
 104         }
 105
 106         // and set it as the foreground window so the mouse can be captured
 107         ::SetForegroundWindow(GetHwnd());
 108     }
 109
 110     return true;
 111 }
 112
 113 #endif // #if wxUSE_POPUPWIN