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