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         wxDELETE(m_windowDisabler);
 147
 148         if ( IsModal() )
 149             EndModal(wxID_CANCEL);
 150     }
 151
 152     if (show && CanDoLayoutAdaptation())
 153         DoLayoutAdaptation();
 154
 155     bool ret = wxDialogBase::Show(show);
 156
 157     if ( show )
 158         InitDialog();
 159
 160     return ret;
 161 }
 162
 163 bool wxDialog::IsModal() const
 164 {
 165     return m_isShowingModal;
 166 }
 167
 168 int wxDialog::ShowModal()
 169 {
 170     if ( IsModal() )
 171     {
 172        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 173        return GetReturnCode();
 174     }
 175
 176     // use the apps top level window as parent if none given unless explicitly
 177     // forbidden
 178     wxWindow * const parent = GetParentForModalDialog();
 179     if ( parent && parent != this )
 180     {
 181         m_parent = parent;
 182     }
 183
 184     Show(true);
 185
 186     m_isShowingModal = true;
 187
 188     wxASSERT_MSG( !m_windowDisabler, wxT("disabling windows twice?") );
 189
 190 #if defined(__WXGTK__) || defined(__WXMGL__)
 191     wxBusyCursorSuspender suspender;
 192     // FIXME (FIXME_MGL) - make sure busy cursor disappears under MSW too
 193 #endif
 194
 195     m_windowDisabler = new wxWindowDisabler(this);
 196     if ( !m_eventLoop )
 197         m_eventLoop = new wxEventLoop;
 198
 199     m_eventLoop->Run();
 200
 201     return GetReturnCode();
 202 }
 203
 204 void wxDialog::EndModal(int retCode)
 205 {
 206     wxASSERT_MSG( m_eventLoop, wxT("wxDialog is not modal") );
 207
 208     SetReturnCode(retCode);
 209
 210     if ( !IsModal() )
 211     {
 212         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 213         return;
 214     }
 215
 216     m_isShowingModal = false;
 217
 218     m_eventLoop->Exit();
 219
 220     Show(false);
 221 }