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     m_isBeingDeleted = true;
  57
  58     // if the dialog is modal, this will end its event loop
  59     Show(false);
  60
  61     delete m_eventLoop;
  62 }
  63
  64 bool wxDialog::Create(wxWindow *parent,
  65                       wxWindowID id, const wxString &title,
  66                       const wxPoint &pos, const wxSize &size,
  67                       long style, const wxString &name)
  68 {
  69     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
  70
  71     // all dialogs should have tab traversal enabled
  72     style |= wxTAB_TRAVERSAL;
  73
  74     return wxTopLevelWindow::Create(parent, id, title, pos, size, style, name);
  75 }
  76
  77 void wxDialog::OnApply(wxCommandEvent &WXUNUSED(event))
  78 {
  79     if ( Validate() )
  80         TransferDataFromWindow();
  81 }
  82
  83 void wxDialog::OnCancel(wxCommandEvent &WXUNUSED(event))
  84 {
  85     if ( IsModal() )
  86     {
  87         EndModal(wxID_CANCEL);
  88     }
  89     else
  90     {
  91         SetReturnCode(wxID_CANCEL);
  92         Show(false);
  93     }
  94 }
  95
  96 void wxDialog::OnOK(wxCommandEvent &WXUNUSED(event))
  97 {
  98     if ( Validate() && TransferDataFromWindow() )
  99     {
 100         if ( IsModal() )
 101         {
 102             EndModal(wxID_OK);
 103         }
 104         else
 105         {
 106             SetReturnCode(wxID_OK);
 107             Show(false);
 108         }
 109     }
 110 }
 111
 112 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 113 {
 114     // We'll send a Cancel message by default,
 115     // which may close the dialog.
 116     // Check for looping if the Cancel event handler calls Close().
 117
 118     // Note that if a cancel button and handler aren't present in the dialog,
 119     // nothing will happen when you close the dialog via the window manager, or
 120     // via Close().
 121     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 122     // created on the stack.
 123     // However, this does mean that calling dialog->Close() won't delete the dialog
 124     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 125     // sure to destroy the dialog.
 126     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 127
 128     static wxList s_closing;
 129
 130     if (s_closing.Member(this))
 131         return;   // no loops
 132
 133     s_closing.Append(this);
 134
 135     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 136     cancelEvent.SetEventObject(this);
 137     GetEventHandler()->ProcessEvent(cancelEvent);
 138     s_closing.DeleteObject(this);
 139 }
 140
 141 bool wxDialog::Show(bool show)
 142 {
 143     if ( !show )
 144     {
 145         // if we had disabled other app windows, reenable them back now because
 146         // if they stay disabled Windows will activate another window (one
 147         // which is enabled, anyhow) and we will lose activation
 148         if ( m_windowDisabler )
 149         {
 150             delete m_windowDisabler;
 151             m_windowDisabler = NULL;
 152         }
 153
 154         if ( IsModal() )
 155             EndModal(wxID_CANCEL);
 156     }
 157
 158     if (show && CanDoLayoutAdaptation())
 159         DoLayoutAdaptation();
 160
 161     bool ret = wxDialogBase::Show(show);
 162
 163     if ( show )
 164         InitDialog();
 165
 166     return ret;
 167 }
 168
 169 bool wxDialog::IsModal() const
 170 {
 171     return m_isShowingModal;
 172 }
 173
 174 int wxDialog::ShowModal()
 175 {
 176     if ( IsModal() )
 177     {
 178        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 179        return GetReturnCode();
 180     }
 181
 182     // use the apps top level window as parent if none given unless explicitly
 183     // forbidden
 184     if ( !GetParent() && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
 185     {
 186         wxWindow * const parent = GetParentForModalDialog();
 187         if ( parent && parent != this )
 188         {
 189             m_parent = parent;
 190         }
 191     }
 192
 193     Show(true);
 194
 195     m_isShowingModal = true;
 196
 197     wxASSERT_MSG( !m_windowDisabler, _T("disabling windows twice?") );
 198
 199 #if defined(__WXGTK__) || defined(__WXMGL__)
 200     wxBusyCursorSuspender suspender;
 201     // FIXME (FIXME_MGL) - make sure busy cursor disappears under MSW too
 202 #endif
 203
 204     m_windowDisabler = new wxWindowDisabler(this);
 205     if ( !m_eventLoop )
 206         m_eventLoop = new wxEventLoop;
 207
 208     m_eventLoop->Run();
 209
 210     return GetReturnCode();
 211 }
 212
 213 void wxDialog::EndModal(int retCode)
 214 {
 215     wxASSERT_MSG( m_eventLoop, _T("wxDialog is not modal") );
 216
 217     SetReturnCode(retCode);
 218
 219     if ( !IsModal() )
 220     {
 221         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 222         return;
 223     }
 224
 225     m_isShowingModal = false;
 226
 227     m_eventLoop->Exit();
 228
 229     Show(false);
 230 }