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