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