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 // Copyright:   (c) 2002 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_POPUPWIN
  27
  28 #ifndef WX_PRECOMP
  29 #endif //WX_PRECOMP
  30
  31 #include "wx/popupwin.h"
  32
  33 #include "wx/msw/private.h"     // for GetDesktopWindow()
  34
  35 // ============================================================================
  36 // implementation
  37 // ============================================================================
  38
  39 bool wxPopupWindow::Create(wxWindow *parent, int flags)
  40 {
  41     // popup windows are created hidden by default
  42     Hide();
  43
  44     return wxPopupWindowBase::Create(parent) &&
  45                wxWindow::Create(parent, wxID_ANY,
  46                                 wxDefaultPosition, wxDefaultSize,
  47                                 flags | wxPOPUP_WINDOW);
  48 }
  49
  50 void wxPopupWindow::DoGetPosition(int *x, int *y) const
  51 {
  52     // the position of a "top level" window such as this should be in
  53     // screen coordinates, not in the client ones which MSW gives us
  54     // (because we are a child window)
  55     wxPopupWindowBase::DoGetPosition(x, y);
  56
  57     GetParent()->ClientToScreen(x, y);
  58 }
  59
  60 WXDWORD wxPopupWindow::MSWGetStyle(long flags, WXDWORD *exstyle) const
  61 {
  62     // we only honour the border flags, the others don't make sense for us
  63     WXDWORD style = wxWindow::MSWGetStyle(flags & wxBORDER_MASK, exstyle);
  64
  65     if ( exstyle )
  66     {
  67         // a popup window floats on top of everything
  68         *exstyle |= WS_EX_TOPMOST | WS_EX_TOOLWINDOW;
  69     }
  70
  71     return style;
  72 }
  73
  74 WXHWND wxPopupWindow::MSWGetParent() const
  75 {
  76     // we must be a child of the desktop to be able to extend beyond the parent
  77     // window client area (like the comboboxes drop downs do)
  78     //
  79     // NB: alternative implementation would be to use WS_POPUP instead of
  80     //     WS_CHILD but then showing a popup would deactivate the parent which
  81     //     is ugly and working around this, although possible, is even more
  82     //     ugly
  83     // GetDesktopWindow() is not always supported on WinCE, and if
  84     // it is, it often returns NULL.
  85 #ifdef __WXWINCE__
  86     return 0;
  87 #else
  88     return (WXHWND)::GetDesktopWindow();
  89 #endif
  90 }
  91
  92 bool wxPopupWindow::Show(bool show)
  93 {
  94     if ( !wxWindowMSW::Show(show) )
  95         return false;
  96
  97     if ( show )
  98     {
  99         // raise to top of z order
 100         if (!::SetWindowPos(GetHwnd(), HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE))
 101         {
 102             wxLogLastError(wxT("SetWindowPos"));
 103         }
 104
 105         // and set it as the foreground window so the mouse can be captured
 106         ::SetForegroundWindow(GetHwnd());
 107     }
 108
 109     return true;
 110 }
 111
 112 #endif // #if wxUSE_POPUPWIN