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