src/univ/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/univ/dialog.cpp
   3 // Author:      Robert Roebling, Vaclav Slavik
   4 // Id:          $Id$
   5 // Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // ============================================================================
  10 // declarations
  11 // ============================================================================
  12
  13 // ----------------------------------------------------------------------------
  14 // headers
  15 // ----------------------------------------------------------------------------
  16
  17 // For compilers that support precompilation, includes "wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __BORLANDC__
  21     #pragma hdrstop
  22 #endif
  23
  24 #include "wx/dialog.h"
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/utils.h"
  28     #include "wx/app.h"
  29 #endif
  30
  31 #include "wx/evtloop.h"
  32
  33 //-----------------------------------------------------------------------------
  34 // wxDialog
  35 //-----------------------------------------------------------------------------
  36
  37 BEGIN_EVENT_TABLE(wxDialog,wxDialogBase)
  38     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
  39     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
  40     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
  41     EVT_CLOSE   (wxDialog::OnCloseWindow)
  42 END_EVENT_TABLE()
  43
  44 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxTopLevelWindow)
  45
  46 void wxDialog::Init()
  47 {
  48     m_returnCode = 0;
  49     m_windowDisabler = NULL;
  50     m_eventLoop = NULL;
  51     m_isShowingModal = false;
  52 }
  53
  54 wxDialog::~wxDialog()
  55 {
  56     delete m_eventLoop;
  57 }
  58
  59 bool wxDialog::Create(wxWindow *parent,
  60                       wxWindowID id, const wxString &title,
  61                       const wxPoint &pos, const wxSize &size,
  62                       long style, const wxString &name)
  63 {
  64     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
  65
  66     // all dialogs should have tab traversal enabled
  67     style |= wxTAB_TRAVERSAL;
  68
  69     return wxTopLevelWindow::Create(parent, id, title, pos, size, style, name);
  70 }
  71
  72 void wxDialog::OnApply(wxCommandEvent &WXUNUSED(event))
  73 {
  74     if ( Validate() )
  75         TransferDataFromWindow();
  76 }
  77
  78 void wxDialog::OnCancel(wxCommandEvent &WXUNUSED(event))
  79 {
  80     if ( IsModal() )
  81     {
  82         EndModal(wxID_CANCEL);
  83     }
  84     else
  85     {
  86         SetReturnCode(wxID_CANCEL);
  87         Show(false);
  88     }
  89 }
  90
  91 void wxDialog::OnOK(wxCommandEvent &WXUNUSED(event))
  92 {
  93     if ( Validate() && TransferDataFromWindow() )
  94     {
  95         if ( IsModal() )
  96         {
  97             EndModal(wxID_OK);
  98         }
  99         else
 100         {
 101             SetReturnCode(wxID_OK);
 102             Show(false);
 103         }
 104     }
 105 }
 106
 107 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 108 {
 109     // We'll send a Cancel message by default,
 110     // which may close the dialog.
 111     // Check for looping if the Cancel event handler calls Close().
 112
 113     // Note that if a cancel button and handler aren't present in the dialog,
 114     // nothing will happen when you close the dialog via the window manager, or
 115     // via Close().
 116     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 117     // created on the stack.
 118     // However, this does mean that calling dialog->Close() won't delete the dialog
 119     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 120     // sure to destroy the dialog.
 121     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 122
 123     static wxList s_closing;
 124
 125     if (s_closing.Member(this))
 126         return;   // no loops
 127
 128     s_closing.Append(this);
 129
 130     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 131     cancelEvent.SetEventObject(this);
 132     GetEventHandler()->ProcessEvent(cancelEvent);
 133     s_closing.DeleteObject(this);
 134 }
 135
 136 bool wxDialog::Show(bool show)
 137 {
 138     if ( !show )
 139     {
 140         // if we had disabled other app windows, reenable them back now because
 141         // if they stay disabled Windows will activate another window (one
 142         // which is enabled, anyhow) and we will lose activation
 143         if ( m_windowDisabler )
 144         {
 145             delete m_windowDisabler;
 146             m_windowDisabler = NULL;
 147         }
 148
 149         if ( IsModal() )
 150             EndModal(wxID_CANCEL);
 151     }
 152
 153     bool ret = wxDialogBase::Show(show);
 154
 155     if ( show )
 156         InitDialog();
 157
 158     return ret;
 159 }
 160
 161 bool wxDialog::IsModal() const
 162 {
 163     return m_isShowingModal;
 164 }
 165
 166 int wxDialog::ShowModal()
 167 {
 168     if ( IsModal() )
 169     {
 170        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 171        return GetReturnCode();
 172     }
 173
 174     // use the apps top level window as parent if none given unless explicitly
 175     // forbidden
 176     if ( !GetParent() && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
 177     {
 178         wxWindow *parent = wxTheApp->GetTopWindow();
 179         if ( parent && parent != this )
 180         {
 181             m_parent = parent;
 182         }
 183     }
 184
 185     Show(true);
 186
 187     m_isShowingModal = true;
 188
 189     wxASSERT_MSG( !m_windowDisabler, _T("disabling windows twice?") );
 190
 191 #if defined(__WXGTK__) || defined(__WXMGL__)
 192     wxBusyCursorSuspender suspender;
 193     // FIXME (FIXME_MGL) - make sure busy cursor disappears under MSW too
 194 #endif
 195
 196     m_windowDisabler = new wxWindowDisabler(this);
 197     if ( !m_eventLoop )
 198         m_eventLoop = new wxEventLoop;
 199
 200     m_eventLoop->Run();
 201
 202     return GetReturnCode();
 203 }
 204
 205 void wxDialog::EndModal(int retCode)
 206 {
 207     wxASSERT_MSG( m_eventLoop, _T("wxDialog is not modal") );
 208
 209     SetReturnCode(retCode);
 210
 211     if ( !IsModal() )
 212     {
 213         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 214         return;
 215     }
 216
 217     m_isShowingModal = false;
 218
 219     m_eventLoop->Exit();
 220
 221     Show(false);
 222 }