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_BORDER;
 137     long func = (long) GDK_FUNC_MOVE ;
 138
 139     if ((win->m_windowStyle & wxCAPTION) != 0)
 140         decor |= GDK_DECOR_TITLE;
 141     if ((win->m_windowStyle & wxSYSTEM_MENU) != 0)
 142     {
 143        decor |= GDK_DECOR_MENU;
 144        func |= GDK_FUNC_CLOSE;
 145     }
 146     if ((win->m_windowStyle & wxMINIMIZE_BOX) != 0)
 147     {
 148         func |= GDK_FUNC_MINIMIZE;
 149         decor |= GDK_DECOR_MINIMIZE;
 150         decor |= GDK_DECOR_BORDER;
 151     }
 152     if ((win->m_windowStyle & wxMAXIMIZE_BOX) != 0)
 153     {
 154         decor |= GDK_DECOR_MAXIMIZE;
 155         func |= GDK_FUNC_MAXIMIZE;
 156         decor |= GDK_DECOR_BORDER;
 157     }
 158     if ((win->m_windowStyle & wxRESIZE_BORDER) != 0)
 159     {
 160        func |= GDK_FUNC_RESIZE;
 161        decor |= GDK_DECOR_RESIZEH;
 162        decor |= GDK_DECOR_BORDER;
 163     }
 164     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 165     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 166
 167     /* GTK's shrinking/growing policy */
 168     if ((win->m_windowStyle & wxRESIZE_BORDER) == 0)
 169         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 170     else
 171         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 172
 173     return FALSE;
 174 }
 175
 176 //-----------------------------------------------------------------------------
 177 // wxDialog
 178 //-----------------------------------------------------------------------------
 179
 180 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 181     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 182     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 183     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 184     EVT_SIZE    (wxDialog::OnSize)
 185     EVT_CLOSE   (wxDialog::OnCloseWindow)
 186 END_EVENT_TABLE()
 187
 188 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 189
 190 void wxDialog::Init()
 191 {
 192     m_sizeSet = FALSE;
 193     m_modalShowing = FALSE;
 194 }
 195
 196 wxDialog::wxDialog( wxWindow *parent,
 197                     wxWindowID id, const wxString &title,
 198                     const wxPoint &pos, const wxSize &size,
 199                     long style, const wxString &name )
 200 {
 201     Init();
 202
 203     Create( parent, id, title, pos, size, style, name );
 204 }
 205
 206 bool wxDialog::Create( wxWindow *parent,
 207                        wxWindowID id, const wxString &title,
 208                        const wxPoint &pos, const wxSize &size,
 209                        long style, const wxString &name )
 210 {
 211     wxTopLevelWindows.Append( this );
 212
 213     m_needParent = FALSE;
 214
 215     PreCreation( parent, id, pos, size, style, name );
 216
 217     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 218     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 219
 220     gtk_widget_set( m_widget, "GtkWindow::allow_shrink", TRUE, NULL);
 221
 222     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 223         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 224
 225     m_wxwindow = gtk_myfixed_new();
 226     gtk_widget_show( m_wxwindow );
 227     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 228
 229     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 230
 231     SetTitle( title );
 232
 233     if (m_parent) m_parent->AddChild( this );
 234
 235     PostCreation();
 236
 237     /*  we cannot set MWM hints  before the widget has
 238         been realized, so we do this directly after realization */
 239     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 240                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 241
 242     /* we set the position of the window after the map event. setting it
 243        before has no effect (with KWM) */
 244     gtk_signal_connect( GTK_OBJECT(m_widget), "map",
 245                         GTK_SIGNAL_FUNC(gtk_dialog_map_callback), (gpointer) this );
 246
 247     /* the user resized the frame by dragging etc. */
 248     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 249         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 250
 251     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 252         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 253
 254     return TRUE;
 255 }
 256
 257 wxDialog::~wxDialog()
 258 {
 259     wxTopLevelWindows.DeleteObject( this );
 260
 261     if (wxTheApp->GetTopWindow() == this)
 262     {
 263         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 264     }
 265
 266     if (wxTopLevelWindows.Number() == 0)
 267     {
 268         wxTheApp->ExitMainLoop();
 269     }
 270 }
 271
 272 void wxDialog::SetTitle( const wxString& title )
 273 {
 274     m_title = title;
 275     if (m_title.IsNull()) m_title = _T("");
 276     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 277 }
 278
 279 wxString wxDialog::GetTitle() const
 280 {
 281     return (wxString&)m_title;
 282 }
 283
 284 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 285 {
 286     if (Validate()) TransferDataFromWindow();
 287 }
 288
 289 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 290 {
 291     if (IsModal())
 292     {
 293         EndModal(wxID_CANCEL);
 294     }
 295     else
 296     {
 297         SetReturnCode(wxID_CANCEL);
 298         this->Show(FALSE);
 299     }
 300 }
 301
 302 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 303 {
 304     if ( Validate() && TransferDataFromWindow())
 305     {
 306         if (IsModal())
 307         {
 308             EndModal(wxID_OK);
 309         }
 310         else
 311         {
 312             SetReturnCode(wxID_OK);
 313             this->Show(FALSE);
 314         }
 315     }
 316 }
 317
 318 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 319 {
 320     // yes
 321 }
 322
 323 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 324 {
 325     // We'll send a Cancel message by default,
 326     // which may close the dialog.
 327     // Check for looping if the Cancel event handler calls Close().
 328
 329     // Note that if a cancel button and handler aren't present in the dialog,
 330     // nothing will happen when you close the dialog via the window manager, or
 331     // via Close().
 332     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 333     // created on the stack.
 334     // However, this does mean that calling dialog->Close() won't delete the dialog
 335     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 336     // sure to destroy the dialog.
 337     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 338
 339     static wxList s_closing;
 340
 341     if (s_closing.Member(this))
 342         return;   // no loops
 343
 344     s_closing.Append(this);
 345
 346     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 347     cancelEvent.SetEventObject( this );
 348     GetEventHandler()->ProcessEvent(cancelEvent);
 349     s_closing.DeleteObject(this);
 350 }
 351
 352 bool wxDialog::Destroy()
 353 {
 354     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 355
 356     return TRUE;
 357 }
 358
 359 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 360 {
 361     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 362
 363     if (GetAutoLayout())
 364     {
 365         Layout();
 366     }
 367     else
 368     {
 369         /* no child: go out ! */
 370         if (!GetChildren().First()) return;
 371
 372         /* do we have exactly one child? */
 373         wxWindow *child = (wxWindow *) NULL;
 374         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 375         {
 376             wxWindow *win = (wxWindow *)node->Data();
 377             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 378             {
 379                 /* it's the second one: do nothing */
 380                 if (child) return;
 381                 child = win;
 382             }
 383         }
 384
 385         /* yes: set it's size to fill all the frame */
 386         int client_x, client_y;
 387         GetClientSize( &client_x, &client_y );
 388         child->SetSize( 1, 1, client_x-2, client_y);
 389     }
 390 }
 391
 392 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 393 {
 394     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 395     wxASSERT_MSG( (m_wxwindow != NULL), _T("invalid dialog") );
 396
 397     if (m_resizing) return; /* I don't like recursions */
 398     m_resizing = TRUE;
 399
 400     int old_x = m_x;
 401     int old_y = m_y;
 402     int old_width = m_width;
 403     int old_height = m_height;
 404
 405     if ((sizeFlags & wxSIZE_USE_EXISTING) == wxSIZE_USE_EXISTING)
 406     {
 407         if (x != -1) m_x = x;
 408         if (y != -1) m_y = y;
 409         if (width != -1) m_width = width;
 410         if (height != -1) m_height = height;
 411     }
 412     else
 413     {
 414         m_x = x;
 415         m_y = y;
 416         m_width = width;
 417         m_height = height;
 418     }
 419
 420     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 421     {
 422         if (width == -1) m_width = 80;
 423     }
 424
 425     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 426     {
 427        if (height == -1) m_height = 26;
 428     }
 429
 430     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 431     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 432     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 433     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 434
 435     if ((m_x != -1) || (m_y != -1))
 436     {
 437         if ((m_x != old_x) || (m_y != old_y))
 438         {
 439             /* we set the position here and when showing the dialog
 440                for the first time in idle time */
 441             gtk_widget_set_uposition( m_widget, m_x, m_y );
 442         }
 443     }
 444
 445     if ((m_width != old_width) || (m_height != old_height))
 446     {
 447         /* actual resizing is deferred to GtkOnSize in idle time and
 448            when showing the dialog */
 449         m_sizeSet = FALSE;
 450     }
 451
 452     m_resizing = FALSE;
 453 }
 454
 455 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 456 {
 457     // due to a bug in gtk, x,y are always 0
 458     // m_x = x;
 459     // m_y = y;
 460
 461     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 462     if (!m_wxwindow) return;
 463
 464     m_width = width;
 465     m_height = height;
 466
 467     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 468     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 469     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 470     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 471
 472     /* we actually set the size of a frame here and no-where else */
 473     gtk_widget_set_usize( m_widget, m_width, m_height );
 474
 475     m_sizeSet = TRUE;
 476
 477     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 478     event.SetEventObject( this );
 479     GetEventHandler()->ProcessEvent( event );
 480 }
 481
 482 void wxDialog::Centre( int direction )
 483 {
 484     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 485
 486     int x = 0;
 487     int y = 0;
 488
 489     if ((direction & wxHORIZONTAL) == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 490     if ((direction & wxVERTICAL) == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 491
 492     Move( x, y );
 493 }
 494
 495 void wxDialog::OnInternalIdle()
 496 {
 497     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 498         GtkOnSize( m_x, m_y, m_width, m_height );
 499 }
 500
 501 bool wxDialog::Show( bool show )
 502 {
 503     if (!show && IsModal())
 504     {
 505         EndModal( wxID_CANCEL );
 506     }
 507
 508     if (show && !m_sizeSet)
 509     {
 510         /* by calling GtkOnSize here, we don't have to call
 511            either after showing the frame, which would entail
 512            much ugly flicker nor from within the size_allocate
 513            handler, because GTK 1.1.X forbids that. */
 514
 515         GtkOnSize( m_x, m_y, m_width, m_height );
 516     }
 517
 518     if (show != m_isShown)
 519     {
 520         if (show)
 521         {
 522             gtk_widget_show( m_widget );
 523         }
 524         else
 525             gtk_widget_hide( m_widget );
 526
 527         m_isShown = show;
 528     }
 529
 530     if (show) InitDialog();
 531
 532     return TRUE;
 533 }
 534
 535 bool wxDialog::IsModal() const
 536 {
 537     return m_modalShowing;
 538 }
 539
 540 void wxDialog::SetModal( bool WXUNUSED(flag) )
 541 {
 542 /*
 543   if (flag)
 544     m_windowStyle |= wxDIALOG_MODAL;
 545   else
 546     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 547 */
 548     wxFAIL_MSG( _T("wxDialog:SetModal obsolete now") );
 549 }
 550
 551 int wxDialog::ShowModal()
 552 {
 553     if (IsModal())
 554     {
 555        wxFAIL_MSG( _T("wxDialog:ShowModal called twice") );
 556        return GetReturnCode();
 557     }
 558
 559     Show( TRUE );
 560
 561     m_modalShowing = TRUE;
 562
 563     gtk_grab_add( m_widget );
 564     gtk_main();
 565     gtk_grab_remove( m_widget );
 566
 567     return GetReturnCode();
 568 }
 569
 570 void wxDialog::EndModal( int retCode )
 571 {
 572     SetReturnCode( retCode );
 573
 574     if (!IsModal())
 575     {
 576         wxFAIL_MSG( _T("wxDialog:EndModal called twice") );
 577         return;
 578     }
 579
 580     m_modalShowing = FALSE;
 581
 582     gtk_main_quit();
 583
 584     Show( FALSE );
 585 }
 586
 587 void wxDialog::InitDialog()
 588 {
 589     wxWindow::InitDialog();
 590 }
 591
 592 void wxDialog::SetIcon( const wxIcon &icon )
 593 {
 594     m_icon = icon;
 595     if (!icon.Ok()) return;
 596
 597     wxMask *mask = icon.GetMask();
 598     GdkBitmap *bm = (GdkBitmap *) NULL;
 599     if (mask) bm = mask->GetBitmap();
 600
 601     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 602 }