src/gtk/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dialog.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dialog.h"
  12 #endif
  13
  14 #include "wx/dialog.h"
  15 #include "wx/frame.h"
  16 #include "wx/app.h"
  17
  18 #include "gdk/gdk.h"
  19 #include "gtk/gtk.h"
  20 #include "wx/gtk/win_gtk.h"
  21
  22 //-----------------------------------------------------------------------------
  23 // idle system
  24 //-----------------------------------------------------------------------------
  25
  26 extern void wxapp_install_idle_handler();
  27 extern bool g_isIdle;
  28
  29 //-----------------------------------------------------------------------------
  30 // data
  31 //-----------------------------------------------------------------------------
  32
  33 extern wxList wxPendingDelete;
  34
  35 //-----------------------------------------------------------------------------
  36 // "delete_event"
  37 //-----------------------------------------------------------------------------
  38
  39 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxDialog *win )
  40 {
  41     if (g_isIdle) wxapp_install_idle_handler();
  42
  43 /*
  44     printf( "OnDelete from " );
  45     if (win->GetClassInfo() && win->GetClassInfo()->GetClassName())
  46         printf( win->GetClassInfo()->GetClassName() );
  47     printf( ".\n" );
  48 */
  49
  50     win->Close();
  51
  52     return TRUE;
  53 }
  54
  55 //-----------------------------------------------------------------------------
  56 // "size_allocate"
  57 //-----------------------------------------------------------------------------
  58
  59 static void gtk_dialog_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxDialog *win )
  60 {
  61     if (g_isIdle) wxapp_install_idle_handler();
  62
  63     if (!win->HasVMT()) return;
  64
  65 /*
  66     printf( "OnDialogResize from " );
  67     if (win->GetClassInfo() && win->GetClassInfo()->GetClassName())
  68         printf( win->GetClassInfo()->GetClassName() );
  69     printf( ".\n" );
  70 */
  71
  72    if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
  73    {
  74        win->m_sizeSet = FALSE;
  75        win->m_width = alloc->width;
  76        win->m_height = alloc->height;
  77    }
  78 }
  79
  80 //-----------------------------------------------------------------------------
  81 // "configure_event"
  82 //-----------------------------------------------------------------------------
  83
  84 static gint gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *event, wxDialog *win )
  85 {
  86     if (g_isIdle) wxapp_install_idle_handler();
  87
  88     if (!win->HasVMT()) return FALSE;
  89
  90     win->m_x = event->x;
  91     win->m_y = event->y;
  92
  93     wxMoveEvent mevent( wxPoint(win->m_x,win->m_y), win->GetId() );
  94     mevent.SetEventObject( win );
  95     win->GetEventHandler()->ProcessEvent( mevent );
  96
  97     return FALSE;
  98 }
  99
 100 //-----------------------------------------------------------------------------
 101 // "realize" from m_widget
 102 //-----------------------------------------------------------------------------
 103
 104 /* we cannot MWM hints and icons before the widget has been realized,
 105    so we do this directly after realization */
 106
 107 static gint
 108 gtk_dialog_realized_callback( GtkWidget *widget, wxDialog *win )
 109 {
 110     if (g_isIdle) wxapp_install_idle_handler();
 111
 112     /* reset the icon */
 113     if (win->m_icon != wxNullIcon)
 114     {
 115         wxIcon icon( win->m_icon );
 116         win->m_icon = wxNullIcon;
 117         win->SetIcon( icon );
 118     }
 119
 120     return FALSE;
 121 }
 122
 123 //-----------------------------------------------------------------------------
 124 // "map" from m_widget
 125 //-----------------------------------------------------------------------------
 126
 127 static gint
 128 gtk_dialog_map_callback( GtkWidget *widget, wxDialog *win )
 129 {
 130     /* I haven''t been able to set the position of
 131        the dialog before it is shown, so I do it here */
 132     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 133
 134     /* all this is for Motif Window Manager "hints" and is supposed to be
 135        recognized by other WM as well. not tested. */
 136     long decor = (long) GDK_DECOR_ALL;
 137     long func = (long) GDK_FUNC_ALL;
 138
 139     if ((win->m_windowStyle & wxCAPTION) == 0)
 140         decor |= GDK_DECOR_TITLE;
 141     if ((win->m_windowStyle & wxSYSTEM_MENU) == 0)
 142         decor |= GDK_DECOR_MENU;
 143     if ((win->m_windowStyle & wxMINIMIZE_BOX) == 0)
 144     {
 145         func |= GDK_FUNC_MINIMIZE;
 146         decor |= GDK_DECOR_MINIMIZE;
 147     }
 148     if ((win->m_windowStyle & wxMAXIMIZE_BOX) == 0)
 149     {
 150         decor |= GDK_DECOR_MAXIMIZE;
 151         func |= GDK_FUNC_MAXIMIZE;
 152     }
 153     if ((win->m_windowStyle & wxRESIZE_BORDER) == 0)
 154         func |= GDK_FUNC_RESIZE;
 155
 156     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 157     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 158
 159     /* GTK's shrinking/growing policy */
 160     if ((win->m_windowStyle & wxRESIZE_BORDER) == 0)
 161         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 162     else
 163         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 164
 165     return FALSE;
 166 }
 167
 168 //-----------------------------------------------------------------------------
 169 // wxDialog
 170 //-----------------------------------------------------------------------------
 171
 172 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 173     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 174     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 175     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 176     EVT_SIZE    (wxDialog::OnSize)
 177     EVT_CLOSE   (wxDialog::OnCloseWindow)
 178 END_EVENT_TABLE()
 179
 180 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 181
 182 void wxDialog::Init()
 183 {
 184     m_sizeSet = FALSE;
 185     m_modalShowing = FALSE;
 186 }
 187
 188 wxDialog::wxDialog( wxWindow *parent,
 189                     wxWindowID id, const wxString &title,
 190                     const wxPoint &pos, const wxSize &size,
 191                     long style, const wxString &name )
 192 {
 193     Init();
 194
 195     Create( parent, id, title, pos, size, style, name );
 196 }
 197
 198 bool wxDialog::Create( wxWindow *parent,
 199                        wxWindowID id, const wxString &title,
 200                        const wxPoint &pos, const wxSize &size,
 201                        long style, const wxString &name )
 202 {
 203     wxTopLevelWindows.Append( this );
 204
 205     m_needParent = FALSE;
 206
 207     PreCreation( parent, id, pos, size, style, name );
 208
 209     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 210     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 211
 212     gtk_widget_set( m_widget, "GtkWindow::allow_shrink", TRUE, NULL);
 213
 214     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 215         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 216
 217     m_wxwindow = gtk_myfixed_new();
 218     gtk_widget_show( m_wxwindow );
 219     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 220
 221     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 222
 223     SetTitle( title );
 224
 225     if (m_parent) m_parent->AddChild( this );
 226
 227     PostCreation();
 228
 229     /*  we cannot set MWM hints  before the widget has
 230         been realized, so we do this directly after realization */
 231     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 232                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 233
 234     /* we set the position of the window after the map event. setting it
 235        before has no effect (with KWM) */
 236     gtk_signal_connect( GTK_OBJECT(m_widget), "map",
 237                         GTK_SIGNAL_FUNC(gtk_dialog_map_callback), (gpointer) this );
 238
 239     /* the user resized the frame by dragging etc. */
 240     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 241         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 242
 243     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 244         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 245
 246     return TRUE;
 247 }
 248
 249 wxDialog::~wxDialog()
 250 {
 251     wxTopLevelWindows.DeleteObject( this );
 252
 253     if (wxTheApp->GetTopWindow() == this)
 254     {
 255         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 256     }
 257
 258     if (wxTopLevelWindows.Number() == 0)
 259     {
 260         wxTheApp->ExitMainLoop();
 261     }
 262 }
 263
 264 void wxDialog::SetTitle( const wxString& title )
 265 {
 266     m_title = title;
 267     if (m_title.IsNull()) m_title = _T("");
 268     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 269 }
 270
 271 wxString wxDialog::GetTitle() const
 272 {
 273     return (wxString&)m_title;
 274 }
 275
 276 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 277 {
 278     if (Validate()) TransferDataFromWindow();
 279 }
 280
 281 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 282 {
 283     if (IsModal())
 284     {
 285         EndModal(wxID_CANCEL);
 286     }
 287     else
 288     {
 289         SetReturnCode(wxID_CANCEL);
 290         this->Show(FALSE);
 291     }
 292 }
 293
 294 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 295 {
 296     if ( Validate() && TransferDataFromWindow())
 297     {
 298         if (IsModal())
 299         {
 300             EndModal(wxID_OK);
 301         }
 302         else
 303         {
 304             SetReturnCode(wxID_OK);
 305             this->Show(FALSE);
 306         }
 307     }
 308 }
 309
 310 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 311 {
 312     // yes
 313 }
 314
 315 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 316 {
 317     // We'll send a Cancel message by default,
 318     // which may close the dialog.
 319     // Check for looping if the Cancel event handler calls Close().
 320
 321     // Note that if a cancel button and handler aren't present in the dialog,
 322     // nothing will happen when you close the dialog via the window manager, or
 323     // via Close().
 324     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 325     // created on the stack.
 326     // However, this does mean that calling dialog->Close() won't delete the dialog
 327     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 328     // sure to destroy the dialog.
 329     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 330
 331     static wxList s_closing;
 332
 333     if (s_closing.Member(this))
 334         return;   // no loops
 335
 336     s_closing.Append(this);
 337
 338     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 339     cancelEvent.SetEventObject( this );
 340     GetEventHandler()->ProcessEvent(cancelEvent);
 341     s_closing.DeleteObject(this);
 342 }
 343
 344 bool wxDialog::Destroy()
 345 {
 346     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 347
 348     return TRUE;
 349 }
 350
 351 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 352 {
 353     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 354
 355     if (GetAutoLayout())
 356     {
 357         Layout();
 358     }
 359     else
 360     {
 361         /* no child: go out ! */
 362         if (!GetChildren().First()) return;
 363
 364         /* do we have exactly one child? */
 365         wxWindow *child = (wxWindow *) NULL;
 366         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 367         {
 368             wxWindow *win = (wxWindow *)node->Data();
 369             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 370             {
 371                 /* it's the second one: do nothing */
 372                 if (child) return;
 373                 child = win;
 374             }
 375         }
 376
 377         /* yes: set it's size to fill all the frame */
 378         int client_x, client_y;
 379         GetClientSize( &client_x, &client_y );
 380         child->SetSize( 1, 1, client_x-2, client_y);
 381     }
 382 }
 383
 384 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 385 {
 386     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 387     wxASSERT_MSG( (m_wxwindow != NULL), _T("invalid dialog") );
 388
 389     if (m_resizing) return; /* I don't like recursions */
 390     m_resizing = TRUE;
 391
 392     int old_x = m_x;
 393     int old_y = m_y;
 394     int old_width = m_width;
 395     int old_height = m_height;
 396
 397     if ((sizeFlags & wxSIZE_USE_EXISTING) == wxSIZE_USE_EXISTING)
 398     {
 399         if (x != -1) m_x = x;
 400         if (y != -1) m_y = y;
 401         if (width != -1) m_width = width;
 402         if (height != -1) m_height = height;
 403     }
 404     else
 405     {
 406         m_x = x;
 407         m_y = y;
 408         m_width = width;
 409         m_height = height;
 410     }
 411
 412     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 413     {
 414         if (width == -1) m_width = 80;
 415     }
 416
 417     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 418     {
 419        if (height == -1) m_height = 26;
 420     }
 421
 422     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 423     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 424     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 425     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 426
 427     if ((m_x != -1) || (m_y != -1))
 428     {
 429         if ((m_x != old_x) || (m_y != old_y))
 430         {
 431             /* we set the position here and when showing the dialog
 432                for the first time in idle time */
 433             gtk_widget_set_uposition( m_widget, m_x, m_y );
 434         }
 435     }
 436
 437     if ((m_width != old_width) || (m_height != old_height))
 438     {
 439         /* actual resizing is deferred to GtkOnSize in idle time and
 440            when showing the dialog */
 441         m_sizeSet = FALSE;
 442     }
 443
 444     m_resizing = FALSE;
 445 }
 446
 447 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 448 {
 449     // due to a bug in gtk, x,y are always 0
 450     // m_x = x;
 451     // m_y = y;
 452
 453     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 454     if (!m_wxwindow) return;
 455
 456     m_width = width;
 457     m_height = height;
 458
 459     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 460     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 461     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 462     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 463
 464     /* we actually set the size of a frame here and no-where else */
 465     gtk_widget_set_usize( m_widget, m_width, m_height );
 466
 467     m_sizeSet = TRUE;
 468
 469     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 470     event.SetEventObject( this );
 471     GetEventHandler()->ProcessEvent( event );
 472 }
 473
 474 void wxDialog::Centre( int direction )
 475 {
 476     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 477
 478     int x = 0;
 479     int y = 0;
 480
 481     if ((direction & wxHORIZONTAL) == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 482     if ((direction & wxVERTICAL) == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 483
 484     Move( x, y );
 485 }
 486
 487 void wxDialog::OnInternalIdle()
 488 {
 489     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 490         GtkOnSize( m_x, m_y, m_width, m_height );
 491 }
 492
 493 bool wxDialog::Show( bool show )
 494 {
 495     if (!show && IsModal())
 496     {
 497         EndModal( wxID_CANCEL );
 498     }
 499
 500     if (show && !m_sizeSet)
 501     {
 502         /* by calling GtkOnSize here, we don't have to call
 503            either after showing the frame, which would entail
 504            much ugly flicker nor from within the size_allocate
 505            handler, because GTK 1.1.X forbids that. */
 506
 507         GtkOnSize( m_x, m_y, m_width, m_height );
 508     }
 509
 510     if (show != m_isShown)
 511     {
 512         if (show)
 513         {
 514             gtk_widget_show( m_widget );
 515         }
 516         else
 517             gtk_widget_hide( m_widget );
 518
 519         m_isShown = show;
 520     }
 521
 522     if (show) InitDialog();
 523
 524     return TRUE;
 525 }
 526
 527 bool wxDialog::IsModal() const
 528 {
 529     return m_modalShowing;
 530 }
 531
 532 void wxDialog::SetModal( bool WXUNUSED(flag) )
 533 {
 534 /*
 535   if (flag)
 536     m_windowStyle |= wxDIALOG_MODAL;
 537   else
 538     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 539 */
 540     wxFAIL_MSG( _T("wxDialog:SetModal obsolete now") );
 541 }
 542
 543 int wxDialog::ShowModal()
 544 {
 545     if (IsModal())
 546     {
 547        wxFAIL_MSG( _T("wxDialog:ShowModal called twice") );
 548        return GetReturnCode();
 549     }
 550
 551     Show( TRUE );
 552
 553     m_modalShowing = TRUE;
 554
 555     gtk_grab_add( m_widget );
 556     gtk_main();
 557     gtk_grab_remove( m_widget );
 558
 559     return GetReturnCode();
 560 }
 561
 562 void wxDialog::EndModal( int retCode )
 563 {
 564     SetReturnCode( retCode );
 565
 566     if (!IsModal())
 567     {
 568         wxFAIL_MSG( _T("wxDialog:EndModal called twice") );
 569         return;
 570     }
 571
 572     m_modalShowing = FALSE;
 573
 574     gtk_main_quit();
 575
 576     Show( FALSE );
 577 }
 578
 579 void wxDialog::InitDialog()
 580 {
 581     wxWindow::InitDialog();
 582 }
 583
 584 void wxDialog::SetIcon( const wxIcon &icon )
 585 {
 586     m_icon = icon;
 587     if (!icon.Ok()) return;
 588
 589     wxMask *mask = icon.GetMask();
 590     GdkBitmap *bm = (GdkBitmap *) NULL;
 591     if (mask) bm = mask->GetBitmap();
 592
 593     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 594 }