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 #include "wx/cursor.h"
  22
  23 /*
  24 #include "gdk/gdkprivate.h"
  25 #include "gdk/gdkx.h"
  26 */
  27
  28 //-----------------------------------------------------------------------------
  29 // idle system
  30 //-----------------------------------------------------------------------------
  31
  32 extern void wxapp_install_idle_handler();
  33 extern bool g_isIdle;
  34
  35 //-----------------------------------------------------------------------------
  36 // data
  37 //-----------------------------------------------------------------------------
  38
  39 extern wxList wxPendingDelete;
  40
  41 /*
  42 //-----------------------------------------------------------------------------
  43 // instruct X to set the WM hint for positioning
  44 //-----------------------------------------------------------------------------
  45
  46 extern "C" {
  47
  48 static void gdk_window_set_position_hint( GdkWindow *window, gint x, gint y )
  49 {
  50   GdkWindowPrivate *priv;
  51   XSizeHints size_hints;
  52
  53   g_return_if_fail (window != NULL);
  54
  55   priv = (GdkWindowPrivate*) window;
  56   if (priv->destroyed) return;
  57
  58   size_hints.flags = PPosition;
  59   size_hints.x = x;
  60   size_hints.y = y;
  61
  62   XSetWMNormalHints (priv->xdisplay, priv->xwindow, &size_hints);
  63 }
  64
  65 }
  66 */
  67
  68 //-----------------------------------------------------------------------------
  69 // "delete_event"
  70 //-----------------------------------------------------------------------------
  71
  72 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxDialog *win )
  73 {
  74     if (g_isIdle)
  75         wxapp_install_idle_handler();
  76
  77     win->Close();
  78
  79     return TRUE;
  80 }
  81
  82 //-----------------------------------------------------------------------------
  83 // "size_allocate"
  84 //-----------------------------------------------------------------------------
  85
  86 static void gtk_dialog_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxDialog *win )
  87 {
  88     if (g_isIdle)
  89         wxapp_install_idle_handler();
  90
  91     if (!win->m_hasVMT) return;
  92
  93     if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
  94     {
  95         win->m_width = alloc->width;
  96         win->m_height = alloc->height;
  97         win->UpdateSize();
  98     }
  99 }
 100
 101 //-----------------------------------------------------------------------------
 102 // "configure_event"
 103 //-----------------------------------------------------------------------------
 104
 105 static gint
 106 #if (GTK_MINOR_VERSON > 0)
 107 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDialog *win )
 108 #else
 109 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *event, wxDialog *win )
 110 #endif
 111 {
 112     if (g_isIdle)
 113         wxapp_install_idle_handler();
 114
 115     if (!win->m_hasVMT) return FALSE;
 116
 117 #if (GTK_MINOR_VERSON > 0)
 118     int x = 0;
 119     int y = 0;
 120     gdk_window_get_root_origin( win->m_widget->window, &x, &y );
 121     win->m_x = x;
 122     win->m_y = y;
 123 #else
 124     win->m_x = event->x;
 125     win->m_y = event->y;
 126 #endif
 127
 128     wxMoveEvent mevent( wxPoint(win->m_x,win->m_y), win->GetId() );
 129     mevent.SetEventObject( win );
 130     win->GetEventHandler()->ProcessEvent( mevent );
 131
 132     return FALSE;
 133 }
 134
 135 //-----------------------------------------------------------------------------
 136 // "realize" from m_widget
 137 //-----------------------------------------------------------------------------
 138
 139 /* we cannot MWM hints and icons before the widget has been realized,
 140    so we do this directly after realization */
 141
 142 static gint
 143 gtk_dialog_realized_callback( GtkWidget *widget, wxDialog *win )
 144 {
 145     if (g_isIdle)
 146         wxapp_install_idle_handler();
 147
 148     /* I haven''t been able to set the position of
 149        the dialog before it is shown, so I set the
 150        position in "realize" and "map" */
 151     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 152
 153 /*
 154     gdk_window_set_position_hint( widget->window, win->m_x, win->m_y );
 155 */
 156
 157     /* reset the icon */
 158     if (win->m_icon != wxNullIcon)
 159     {
 160         wxIcon icon( win->m_icon );
 161         win->m_icon = wxNullIcon;
 162         win->SetIcon( icon );
 163     }
 164
 165     return FALSE;
 166 }
 167
 168 //-----------------------------------------------------------------------------
 169 // "map" from m_widget
 170 //-----------------------------------------------------------------------------
 171
 172 static gint
 173 gtk_dialog_map_callback( GtkWidget *widget, wxDialog *win )
 174 {
 175     if (g_isIdle)
 176         wxapp_install_idle_handler();
 177
 178     /* I haven''t been able to set the position of
 179        the dialog before it is shown, so I set the
 180        position in "realize" and "map" */
 181     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 182
 183     /* all this is for Motif Window Manager "hints" and is supposed to be
 184        recognized by other WM as well. not tested. */
 185     long decor = (long) GDK_DECOR_BORDER;
 186     long func = (long) GDK_FUNC_MOVE ;
 187
 188     if ((win->GetWindowStyle() & wxCAPTION) != 0)
 189         decor |= GDK_DECOR_TITLE;
 190     if ((win->GetWindowStyle() & wxSYSTEM_MENU) != 0)
 191     {
 192        decor |= GDK_DECOR_MENU;
 193        func |= GDK_FUNC_CLOSE;
 194     }
 195     if ((win->GetWindowStyle() & wxMINIMIZE_BOX) != 0)
 196     {
 197         func |= GDK_FUNC_MINIMIZE;
 198         decor |= GDK_DECOR_MINIMIZE;
 199     }
 200     if ((win->GetWindowStyle() & wxMAXIMIZE_BOX) != 0)
 201     {
 202         decor |= GDK_DECOR_MAXIMIZE;
 203         func |= GDK_FUNC_MAXIMIZE;
 204     }
 205     if ((win->GetWindowStyle() & wxRESIZE_BORDER) != 0)
 206     {
 207        func |= GDK_FUNC_RESIZE;
 208        decor |= GDK_DECOR_RESIZEH;
 209     }
 210     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 211     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 212
 213     /* GTK's shrinking/growing policy */
 214     if ((win->GetWindowStyle() & wxRESIZE_BORDER) == 0)
 215         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 216     else
 217         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 218
 219     return FALSE;
 220 }
 221
 222 //-----------------------------------------------------------------------------
 223 // InsertChild for wxDialog
 224 //-----------------------------------------------------------------------------
 225
 226 /* Callback for wxFrame. This very strange beast has to be used because
 227  * C++ has no virtual methods in a constructor. We have to emulate a
 228  * virtual function here as wxWindows requires different ways to insert
 229  * a child in container classes. */
 230
 231 static void wxInsertChildInDialog( wxDialog* parent, wxWindow* child )
 232 {
 233     gtk_myfixed_put( GTK_MYFIXED(parent->m_wxwindow),
 234                      GTK_WIDGET(child->m_widget),
 235                      child->m_x,
 236                      child->m_y,
 237                      child->m_width,
 238                      child->m_height );
 239
 240     if (parent->HasFlag(wxTAB_TRAVERSAL))
 241     {
 242         /* we now allow a window to get the focus as long as it
 243            doesn't have any children. */
 244         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 245     }
 246 }
 247
 248 //-----------------------------------------------------------------------------
 249 // wxDialog
 250 //-----------------------------------------------------------------------------
 251
 252 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 253     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 254     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 255     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 256     EVT_SIZE    (wxDialog::OnSize)
 257     EVT_CLOSE   (wxDialog::OnCloseWindow)
 258 END_EVENT_TABLE()
 259
 260 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 261
 262 void wxDialog::Init()
 263 {
 264     m_returnCode = 0;
 265     m_sizeSet = FALSE;
 266     m_modalShowing = FALSE;
 267 }
 268
 269 wxDialog::wxDialog( wxWindow *parent,
 270                     wxWindowID id, const wxString &title,
 271                     const wxPoint &pos, const wxSize &size,
 272                     long style, const wxString &name )
 273 {
 274     Init();
 275
 276     Create( parent, id, title, pos, size, style, name );
 277 }
 278
 279 bool wxDialog::Create( wxWindow *parent,
 280                        wxWindowID id, const wxString &title,
 281                        const wxPoint &pos, const wxSize &size,
 282                        long style, const wxString &name )
 283 {
 284     wxTopLevelWindows.Append( this );
 285
 286     m_needParent = FALSE;
 287
 288     if (!PreCreation( parent, pos, size ) ||
 289         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 290     {
 291         wxFAIL_MSG( _T("wxDialog creation failed") );
 292         return FALSE;
 293     }
 294
 295     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 296
 297     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 298
 299     if (!name.IsEmpty())
 300         gtk_window_set_wmclass( GTK_WINDOW(m_widget), name.mb_str(), name.mb_str() );
 301
 302     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 303
 304     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 305         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 306
 307     m_wxwindow = gtk_myfixed_new();
 308     gtk_widget_show( m_wxwindow );
 309     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 310
 311     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 312
 313     SetTitle( title );
 314
 315     if (m_parent) m_parent->AddChild( this );
 316
 317     PostCreation();
 318
 319     /*  we cannot set MWM hints  before the widget has
 320         been realized, so we do this directly after realization */
 321     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 322                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 323
 324     /* we set the position of the window after the map event. setting it
 325        before has no effect (with KWM) */
 326     gtk_signal_connect( GTK_OBJECT(m_widget), "map",
 327                         GTK_SIGNAL_FUNC(gtk_dialog_map_callback), (gpointer) this );
 328
 329     /* the user resized the frame by dragging etc. */
 330     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 331         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 332
 333     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 334         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 335
 336     return TRUE;
 337 }
 338
 339 wxDialog::~wxDialog()
 340 {
 341     m_isBeingDeleted = TRUE;
 342
 343     wxTopLevelWindows.DeleteObject( this );
 344
 345     if (wxTheApp->GetTopWindow() == this)
 346     {
 347         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 348     }
 349
 350     if (wxTopLevelWindows.Number() == 0)
 351     {
 352         wxTheApp->ExitMainLoop();
 353     }
 354 }
 355
 356 void wxDialog::SetTitle( const wxString& title )
 357 {
 358     m_title = title;
 359     if (m_title.IsNull()) m_title = _T("");
 360     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 361 }
 362
 363 wxString wxDialog::GetTitle() const
 364 {
 365     return (wxString&)m_title;
 366 }
 367
 368 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 369 {
 370     if (Validate()) TransferDataFromWindow();
 371 }
 372
 373 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 374 {
 375     if (IsModal())
 376     {
 377         EndModal(wxID_CANCEL);
 378     }
 379     else
 380     {
 381         SetReturnCode(wxID_CANCEL);
 382         Show(FALSE);
 383     }
 384 }
 385
 386 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 387 {
 388     if (Validate() && TransferDataFromWindow())
 389     {
 390         if (IsModal())
 391         {
 392             EndModal(wxID_OK);
 393         }
 394         else
 395         {
 396             SetReturnCode(wxID_OK);
 397             this->Show(FALSE);
 398         }
 399     }
 400 }
 401
 402 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 403 {
 404     // yes
 405 }
 406
 407 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 408 {
 409     // We'll send a Cancel message by default,
 410     // which may close the dialog.
 411     // Check for looping if the Cancel event handler calls Close().
 412
 413     // Note that if a cancel button and handler aren't present in the dialog,
 414     // nothing will happen when you close the dialog via the window manager, or
 415     // via Close().
 416     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 417     // created on the stack.
 418     // However, this does mean that calling dialog->Close() won't delete the dialog
 419     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 420     // sure to destroy the dialog.
 421     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 422
 423     static wxList s_closing;
 424
 425     if (s_closing.Member(this))
 426         return;   // no loops
 427
 428     s_closing.Append(this);
 429
 430     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 431     cancelEvent.SetEventObject( this );
 432     GetEventHandler()->ProcessEvent(cancelEvent);
 433     s_closing.DeleteObject(this);
 434 }
 435
 436 bool wxDialog::Destroy()
 437 {
 438     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 439
 440     return TRUE;
 441 }
 442
 443 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 444 {
 445     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 446
 447 #if wxUSE_CONSTRAINTS
 448     if (GetAutoLayout())
 449     {
 450         Layout();
 451     }
 452     else
 453 #endif // wxUSE_CONSTRAINTS
 454     {
 455         /* no child: go out ! */
 456         if (!GetChildren().First()) return;
 457
 458         /* do we have exactly one child? */
 459         wxWindow *child = (wxWindow *) NULL;
 460         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 461         {
 462             wxWindow *win = (wxWindow *)node->Data();
 463             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 464             {
 465                 /* it's the second one: do nothing */
 466                 if (child) return;
 467                 child = win;
 468             }
 469         }
 470
 471         /* yes: set it's size to fill all the frame */
 472         int client_x, client_y;
 473         GetClientSize( &client_x, &client_y );
 474         child->SetSize( 1, 1, client_x-2, client_y);
 475     }
 476 }
 477
 478 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 479 {
 480     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 481     wxASSERT_MSG( (m_wxwindow != NULL), _T("invalid dialog") );
 482
 483     if (m_resizing) return; /* I don't like recursions */
 484     m_resizing = TRUE;
 485
 486     int old_x = m_x;
 487     int old_y = m_y;
 488     int old_width = m_width;
 489     int old_height = m_height;
 490
 491     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 492     {
 493         if (x != -1) m_x = x;
 494         if (y != -1) m_y = y;
 495         if (width != -1) m_width = width;
 496         if (height != -1) m_height = height;
 497     }
 498     else
 499     {
 500         m_x = x;
 501         m_y = y;
 502         m_width = width;
 503         m_height = height;
 504     }
 505
 506     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 507     {
 508         if (width == -1) m_width = 80;
 509     }
 510
 511     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 512     {
 513        if (height == -1) m_height = 26;
 514     }
 515
 516     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 517     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 518     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 519     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 520
 521     if ((m_x != -1) || (m_y != -1))
 522     {
 523         if ((m_x != old_x) || (m_y != old_y))
 524         {
 525             /* we set the position here and when showing the dialog
 526                for the first time in idle time */
 527             gtk_widget_set_uposition( m_widget, m_x, m_y );
 528         }
 529     }
 530
 531     if ((m_width != old_width) || (m_height != old_height))
 532     {
 533         /* actual resizing is deferred to GtkOnSize in idle time and
 534            when showing the dialog */
 535         m_sizeSet = FALSE;
 536     }
 537
 538     m_resizing = FALSE;
 539 }
 540
 541 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 542 {
 543     // due to a bug in gtk, x,y are always 0
 544     // m_x = x;
 545     // m_y = y;
 546
 547     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 548     if (!m_wxwindow) return;
 549
 550     m_width = width;
 551     m_height = height;
 552
 553     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 554     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 555     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 556     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 557
 558     /* we actually set the size of a frame here and no-where else */
 559     gtk_widget_set_usize( m_widget, m_width, m_height );
 560
 561     m_sizeSet = TRUE;
 562
 563     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 564     event.SetEventObject( this );
 565     GetEventHandler()->ProcessEvent( event );
 566 }
 567
 568 void wxDialog::Centre( int direction )
 569 {
 570     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 571
 572     int x = 0;
 573     int y = 0;
 574
 575     if ((direction & wxHORIZONTAL) == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 576     if ((direction & wxVERTICAL) == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 577
 578     Move( x, y );
 579 }
 580
 581 void wxDialog::OnInternalIdle()
 582 {
 583     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 584         GtkOnSize( m_x, m_y, m_width, m_height );
 585
 586     wxWindow::OnInternalIdle();
 587 }
 588
 589 bool wxDialog::Show( bool show )
 590 {
 591     if (!show && IsModal())
 592     {
 593         EndModal( wxID_CANCEL );
 594     }
 595
 596     if (show && !m_sizeSet)
 597     {
 598         /* by calling GtkOnSize here, we don't have to call
 599            either after showing the frame, which would entail
 600            much ugly flicker nor from within the size_allocate
 601            handler, because GTK 1.1.X forbids that. */
 602
 603         GtkOnSize( m_x, m_y, m_width, m_height );
 604     }
 605
 606     bool ret = wxWindow::Show( show );
 607
 608     if (show) InitDialog();
 609
 610     return ret;
 611 }
 612
 613 bool wxDialog::IsModal() const
 614 {
 615     return m_modalShowing;
 616 }
 617
 618 void wxDialog::SetModal( bool WXUNUSED(flag) )
 619 {
 620 /*
 621   if (flag)
 622     m_windowStyle |= wxDIALOG_MODAL;
 623   else
 624     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 625 */
 626     wxFAIL_MSG( _T("wxDialog:SetModal obsolete now") );
 627 }
 628
 629 int wxDialog::ShowModal()
 630 {
 631     if (IsModal())
 632     {
 633        wxFAIL_MSG( _T("wxDialog:ShowModal called twice") );
 634        return GetReturnCode();
 635     }
 636
 637     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 638
 639     Show( TRUE );
 640
 641     m_modalShowing = TRUE;
 642
 643     gtk_grab_add( m_widget );
 644     gtk_main();
 645     gtk_grab_remove( m_widget );
 646
 647     return GetReturnCode();
 648 }
 649
 650 void wxDialog::EndModal( int retCode )
 651 {
 652     SetReturnCode( retCode );
 653
 654     if (!IsModal())
 655     {
 656         wxFAIL_MSG( _T("wxDialog:EndModal called twice") );
 657         return;
 658     }
 659
 660     m_modalShowing = FALSE;
 661
 662     gtk_main_quit();
 663
 664     Show( FALSE );
 665 }
 666
 667 void wxDialog::InitDialog()
 668 {
 669     wxWindow::InitDialog();
 670 }
 671
 672 void wxDialog::SetIcon( const wxIcon &icon )
 673 {
 674     m_icon = icon;
 675     if (!icon.Ok()) return;
 676
 677     if (!m_widget->window) return;
 678
 679     wxMask *mask = icon.GetMask();
 680     GdkBitmap *bm = (GdkBitmap *) NULL;
 681     if (mask) bm = mask->GetBitmap();
 682
 683     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 684 }