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