src/msw/msgdlg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/msgdlg.cpp
   3 // Purpose:     wxMessageDialog
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #include "wx/msgdlg.h"
  20
  21 #ifndef WX_PRECOMP
  22     #include "wx/app.h"
  23     #include "wx/utils.h"
  24     #include "wx/dialog.h"
  25 #endif
  26
  27 #include "wx/msw/private.h"
  28
  29 // For MB_TASKMODAL
  30 #ifdef __WXWINCE__
  31 #include "wx/msw/wince/missing.h"
  32 #endif
  33
  34 IMPLEMENT_CLASS(wxMessageDialog, wxDialog)
  35
  36 wxMessageDialog::wxMessageDialog(wxWindow *parent,
  37                                  const wxString& message,
  38                                  const wxString& caption,
  39                                  long style,
  40                                  const wxPoint& WXUNUSED(pos))
  41 {
  42     m_caption = caption;
  43     m_message = message;
  44     m_parent = parent;
  45     SetMessageDialogStyle(style);
  46 }
  47
  48 int wxMessageDialog::ShowModal()
  49 {
  50     if ( !wxTheApp->GetTopWindow() )
  51     {
  52         // when the message box is shown from wxApp::OnInit() (i.e. before the
  53         // message loop is entered), this must be done or the next message box
  54         // will never be shown - just try putting 2 calls to wxMessageBox() in
  55         // OnInit() to see it
  56         while ( wxTheApp->Pending() )
  57             wxTheApp->Dispatch();
  58     }
  59
  60     // use the top level window as parent if none specified
  61     if ( !m_parent )
  62         m_parent = FindSuitableParent();
  63     HWND hWnd = m_parent ? GetHwndOf(m_parent) : NULL;
  64
  65     // translate wx style in MSW
  66     unsigned int msStyle = MB_OK;
  67     const long wxStyle = GetMessageDialogStyle();
  68     if (wxStyle & wxYES_NO)
  69     {
  70 #if !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
  71         if (wxStyle & wxCANCEL)
  72             msStyle = MB_YESNOCANCEL;
  73         else
  74 #endif // !(__SMARTPHONE__ && __WXWINCE__)
  75             msStyle = MB_YESNO;
  76
  77         if (wxStyle & wxNO_DEFAULT)
  78             msStyle |= MB_DEFBUTTON2;
  79     }
  80
  81     if (wxStyle & wxOK)
  82     {
  83         if (wxStyle & wxCANCEL)
  84             msStyle = MB_OKCANCEL;
  85         else
  86             msStyle = MB_OK;
  87     }
  88     if (wxStyle & wxICON_EXCLAMATION)
  89         msStyle |= MB_ICONEXCLAMATION;
  90     else if (wxStyle & wxICON_HAND)
  91         msStyle |= MB_ICONHAND;
  92     else if (wxStyle & wxICON_INFORMATION)
  93         msStyle |= MB_ICONINFORMATION;
  94     else if (wxStyle & wxICON_QUESTION)
  95         msStyle |= MB_ICONQUESTION;
  96
  97     if ( wxStyle & wxSTAY_ON_TOP )
  98         msStyle |= MB_TOPMOST;
  99
 100 #ifndef __WXWINCE__
 101     if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
 102         msStyle |= MB_RTLREADING | MB_RIGHT;
 103 #endif
 104
 105     if (hWnd)
 106         msStyle |= MB_APPLMODAL;
 107     else
 108         msStyle |= MB_TASKMODAL;
 109
 110     // per MSDN documentation for MessageBox() we can prefix the message with 2
 111     // right-to-left mark characters to tell the function to use RTL layout
 112     // (unfortunately this only works in Unicode builds)
 113     wxString message = m_message;
 114 #if wxUSE_UNICODE
 115     if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
 116     {
 117         // NB: not all compilers support \u escapes
 118         static const wchar_t wchRLM = 0x200f;
 119         message.Prepend(wxString(wchRLM, 2));
 120     }
 121 #endif // wxUSE_UNICODE
 122
 123     // do show the dialog
 124     int msAns = MessageBox(hWnd, message, m_caption, msStyle);
 125     int ans;
 126     switch (msAns)
 127     {
 128         default:
 129             wxFAIL_MSG(_T("unexpected ::MessageBox() return code"));
 130             // fall through
 131
 132         case IDCANCEL:
 133             ans = wxID_CANCEL;
 134             break;
 135         case IDOK:
 136             ans = wxID_OK;
 137             break;
 138         case IDYES:
 139             ans = wxID_YES;
 140             break;
 141         case IDNO:
 142             ans = wxID_NO;
 143             break;
 144     }
 145     return ans;
 146 }