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