src/gtk/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/dialog.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/dialog.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/app.h"
  17     #include "wx/frame.h"
  18     #include "wx/cursor.h"
  19 #endif // WX_PRECOMP
  20
  21 #include "wx/evtloop.h"
  22
  23 #include <gdk/gdk.h>
  24 #include <gtk/gtk.h>
  25 #include <gdk/gdkkeysyms.h>
  26
  27 #include "wx/gtk/win_gtk.h"
  28
  29 //-----------------------------------------------------------------------------
  30 // global data
  31 //-----------------------------------------------------------------------------
  32
  33 extern int g_openDialogs;
  34
  35 //-----------------------------------------------------------------------------
  36 // wxDialog
  37 //-----------------------------------------------------------------------------
  38
  39 BEGIN_EVENT_TABLE(wxDialog,wxDialogBase)
  40     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
  41     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
  42     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
  43     EVT_CLOSE   (wxDialog::OnCloseWindow)
  44 END_EVENT_TABLE()
  45
  46 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxTopLevelWindow)
  47
  48 void wxDialog::Init()
  49 {
  50     m_returnCode = 0;
  51     m_sizeSet = false;
  52     m_modalShowing = false;
  53     m_themeEnabled = true;
  54 }
  55
  56 wxDialog::wxDialog( wxWindow *parent,
  57                     wxWindowID id, const wxString &title,
  58                     const wxPoint &pos, const wxSize &size,
  59                     long style, const wxString &name )
  60 {
  61     Init();
  62
  63     (void)Create( parent, id, title, pos, size, style, name );
  64 }
  65
  66 bool wxDialog::Create( wxWindow *parent,
  67                        wxWindowID id, const wxString &title,
  68                        const wxPoint &pos, const wxSize &size,
  69                        long style, const wxString &name )
  70 {
  71     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
  72
  73     // all dialogs should have tab traversal enabled
  74     style |= wxTAB_TRAVERSAL;
  75
  76     return wxTopLevelWindow::Create(parent, id, title, pos, size, style, name);
  77 }
  78
  79 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
  80 {
  81     if (Validate())
  82         TransferDataFromWindow();
  83 }
  84
  85 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
  86 {
  87     if (IsModal())
  88     {
  89         EndModal(wxID_CANCEL);
  90     }
  91     else
  92     {
  93         SetReturnCode(wxID_CANCEL);
  94         Show(false);
  95     }
  96 }
  97
  98 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
  99 {
 100     if (Validate() && TransferDataFromWindow())
 101     {
 102         if (IsModal())
 103         {
 104             EndModal(wxID_OK);
 105         }
 106         else
 107         {
 108             SetReturnCode(wxID_OK);
 109             Show(false);
 110         }
 111     }
 112 }
 113
 114 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 115 {
 116     // yes
 117 }
 118
 119 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 120 {
 121     // We'll send a Cancel message by default,
 122     // which may close the dialog.
 123     // Check for looping if the Cancel event handler calls Close().
 124
 125     // Note that if a cancel button and handler aren't present in the dialog,
 126     // nothing will happen when you close the dialog via the window manager, or
 127     // via Close().
 128     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 129     // created on the stack.
 130     // However, this does mean that calling dialog->Close() won't delete the dialog
 131     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 132     // sure to destroy the dialog.
 133     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 134
 135     static wxList s_closing;
 136
 137     if (s_closing.Member(this))
 138         return;   // no loops
 139
 140     s_closing.Append(this);
 141
 142     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 143     cancelEvent.SetEventObject( this );
 144     GetEventHandler()->ProcessEvent(cancelEvent);
 145     s_closing.DeleteObject(this);
 146 }
 147
 148 bool wxDialog::Show( bool show )
 149 {
 150     if (!show && IsModal())
 151     {
 152         EndModal( wxID_CANCEL );
 153     }
 154
 155     if (show && !m_sizeSet)
 156     {
 157         /* by calling GtkOnSize here, we don't have to call
 158            either after showing the frame, which would entail
 159            much ugly flicker nor from within the size_allocate
 160            handler, because GTK 1.1.X forbids that. */
 161
 162         GtkOnSize( m_x, m_y, m_width, m_height );
 163     }
 164
 165     bool ret = wxWindow::Show( show );
 166
 167     if (show) InitDialog();
 168
 169     return ret;
 170 }
 171
 172 bool wxDialog::IsModal() const
 173 {
 174     return m_modalShowing;
 175 }
 176
 177 void wxDialog::SetModal( bool WXUNUSED(flag) )
 178 {
 179     wxFAIL_MSG( wxT("wxDialog:SetModal obsolete now") );
 180 }
 181
 182 int wxDialog::ShowModal()
 183 {
 184     if (IsModal())
 185     {
 186        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 187        return GetReturnCode();
 188     }
 189
 190     // use the apps top level window as parent if none given unless explicitly
 191     // forbidden
 192     if ( !GetParent() && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
 193     {
 194         wxWindow *parent = wxTheApp->GetTopWindow();
 195         if ( parent &&
 196                 parent != this &&
 197                     parent->IsBeingDeleted() &&
 198                         !(parent->GetExtraStyle() & wxWS_EX_TRANSIENT) )
 199         {
 200             m_parent = parent;
 201             gtk_window_set_transient_for( GTK_WINDOW(m_widget), GTK_WINDOW(parent->m_widget) );
 202         }
 203     }
 204
 205     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 206
 207     Show( true );
 208
 209     m_modalShowing = true;
 210
 211     g_openDialogs++;
 212
 213     // NOTE: gtk_window_set_modal internally calls gtk_grab_add() !
 214     gtk_window_set_modal(GTK_WINDOW(m_widget), TRUE);
 215
 216     wxEventLoop().Run();
 217
 218     gtk_window_set_modal(GTK_WINDOW(m_widget), FALSE);
 219
 220     g_openDialogs--;
 221
 222     return GetReturnCode();
 223 }
 224
 225 void wxDialog::EndModal( int retCode )
 226 {
 227     SetReturnCode( retCode );
 228
 229     if (!IsModal())
 230     {
 231         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 232         return;
 233     }
 234
 235     m_modalShowing = false;
 236
 237     gtk_main_quit();
 238
 239     Show( false );
 240 }