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     wxTopLevelWindows.DeleteObject( this );
 249
 250     if (wxTheApp->GetTopWindow() == this)
 251     {
 252         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 253     }
 254
 255     if (wxTopLevelWindows.Number() == 0)
 256     {
 257         wxTheApp->ExitMainLoop();
 258     }
 259 }
 260
 261 void wxDialog::SetTitle( const wxString& title )
 262 {
 263     m_title = title;
 264     if (m_title.IsNull()) m_title = _T("");
 265     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 266 }
 267
 268 wxString wxDialog::GetTitle() const
 269 {
 270     return (wxString&)m_title;
 271 }
 272
 273 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 274 {
 275     if (Validate()) TransferDataFromWindow();
 276 }
 277
 278 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 279 {
 280     if (IsModal())
 281     {
 282         EndModal(wxID_CANCEL);
 283     }
 284     else
 285     {
 286         SetReturnCode(wxID_CANCEL);
 287         this->Show(FALSE);
 288     }
 289 }
 290
 291 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 292 {
 293     if ( Validate() && TransferDataFromWindow())
 294     {
 295         if (IsModal())
 296         {
 297             EndModal(wxID_OK);
 298         }
 299         else
 300         {
 301             SetReturnCode(wxID_OK);
 302             this->Show(FALSE);
 303         }
 304     }
 305 }
 306
 307 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 308 {
 309     // yes
 310 }
 311
 312 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 313 {
 314     // We'll send a Cancel message by default,
 315     // which may close the dialog.
 316     // Check for looping if the Cancel event handler calls Close().
 317
 318     // Note that if a cancel button and handler aren't present in the dialog,
 319     // nothing will happen when you close the dialog via the window manager, or
 320     // via Close().
 321     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 322     // created on the stack.
 323     // However, this does mean that calling dialog->Close() won't delete the dialog
 324     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 325     // sure to destroy the dialog.
 326     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 327
 328     static wxList s_closing;
 329
 330     if (s_closing.Member(this))
 331         return;   // no loops
 332
 333     s_closing.Append(this);
 334
 335     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 336     cancelEvent.SetEventObject( this );
 337     GetEventHandler()->ProcessEvent(cancelEvent);
 338     s_closing.DeleteObject(this);
 339 }
 340
 341 bool wxDialog::Destroy()
 342 {
 343     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 344
 345     return TRUE;
 346 }
 347
 348 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 349 {
 350     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 351
 352     if (GetAutoLayout())
 353     {
 354         Layout();
 355     }
 356     else
 357     {
 358         /* no child: go out ! */
 359         if (!GetChildren().First()) return;
 360
 361         /* do we have exactly one child? */
 362         wxWindow *child = (wxWindow *) NULL;
 363         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 364         {
 365             wxWindow *win = (wxWindow *)node->Data();
 366             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 367             {
 368                 /* it's the second one: do nothing */
 369                 if (child) return;
 370                 child = win;
 371             }
 372         }
 373
 374         /* yes: set it's size to fill all the frame */
 375         int client_x, client_y;
 376         GetClientSize( &client_x, &client_y );
 377         child->SetSize( 1, 1, client_x-2, client_y);
 378     }
 379 }
 380
 381 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 382 {
 383     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 384     wxASSERT_MSG( (m_wxwindow != NULL), _T("invalid dialog") );
 385
 386     if (m_resizing) return; /* I don't like recursions */
 387     m_resizing = TRUE;
 388
 389     int old_x = m_x;
 390     int old_y = m_y;
 391     int old_width = m_width;
 392     int old_height = m_height;
 393
 394     if ((sizeFlags & wxSIZE_USE_EXISTING) == wxSIZE_USE_EXISTING)
 395     {
 396         if (x != -1) m_x = x;
 397         if (y != -1) m_y = y;
 398         if (width != -1) m_width = width;
 399         if (height != -1) m_height = height;
 400     }
 401     else
 402     {
 403         m_x = x;
 404         m_y = y;
 405         m_width = width;
 406         m_height = height;
 407     }
 408
 409     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 410     {
 411         if (width == -1) m_width = 80;
 412     }
 413
 414     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 415     {
 416        if (height == -1) m_height = 26;
 417     }
 418
 419     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 420     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 421     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 422     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 423
 424     if ((m_x != -1) || (m_y != -1))
 425     {
 426         if ((m_x != old_x) || (m_y != old_y))
 427         {
 428             /* we set the position here and when showing the dialog
 429                for the first time in idle time */
 430             gtk_widget_set_uposition( m_widget, m_x, m_y );
 431         }
 432     }
 433
 434     if ((m_width != old_width) || (m_height != old_height))
 435     {
 436         /* actual resizing is deferred to GtkOnSize in idle time and
 437            when showing the dialog */
 438         m_sizeSet = FALSE;
 439     }
 440
 441     m_resizing = FALSE;
 442 }
 443
 444 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 445 {
 446     // due to a bug in gtk, x,y are always 0
 447     // m_x = x;
 448     // m_y = y;
 449
 450     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 451     if (!m_wxwindow) return;
 452
 453     m_width = width;
 454     m_height = height;
 455
 456     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 457     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 458     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 459     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 460
 461     /* we actually set the size of a frame here and no-where else */
 462     gtk_widget_set_usize( m_widget, m_width, m_height );
 463
 464     m_sizeSet = TRUE;
 465
 466     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 467     event.SetEventObject( this );
 468     GetEventHandler()->ProcessEvent( event );
 469 }
 470
 471 void wxDialog::Centre( int direction )
 472 {
 473     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 474
 475     int x = 0;
 476     int y = 0;
 477
 478     if ((direction & wxHORIZONTAL) == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 479     if ((direction & wxVERTICAL) == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 480
 481     Move( x, y );
 482 }
 483
 484 void wxDialog::OnInternalIdle()
 485 {
 486     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 487         GtkOnSize( m_x, m_y, m_width, m_height );
 488 }
 489
 490 bool wxDialog::Show( bool show )
 491 {
 492     if (!show && IsModal())
 493     {
 494         EndModal( wxID_CANCEL );
 495     }
 496
 497     if (show && !m_sizeSet)
 498     {
 499         /* by calling GtkOnSize here, we don't have to call
 500            either after showing the frame, which would entail
 501            much ugly flicker nor from within the size_allocate
 502            handler, because GTK 1.1.X forbids that. */
 503
 504         GtkOnSize( m_x, m_y, m_width, m_height );
 505     }
 506
 507     if (show != m_isShown)
 508     {
 509         if (show)
 510         {
 511             gtk_widget_show( m_widget );
 512         }
 513         else
 514             gtk_widget_hide( m_widget );
 515
 516         m_isShown = show;
 517     }
 518
 519     if (show) InitDialog();
 520
 521     return TRUE;
 522 }
 523
 524 bool wxDialog::IsModal() const
 525 {
 526     return m_modalShowing;
 527 }
 528
 529 void wxDialog::SetModal( bool WXUNUSED(flag) )
 530 {
 531 /*
 532   if (flag)
 533     m_windowStyle |= wxDIALOG_MODAL;
 534   else
 535     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 536 */
 537     wxFAIL_MSG( _T("wxDialog:SetModal obsolete now") );
 538 }
 539
 540 int wxDialog::ShowModal()
 541 {
 542     if (IsModal())
 543     {
 544        wxFAIL_MSG( _T("wxDialog:ShowModal called twice") );
 545        return GetReturnCode();
 546     }
 547
 548     Show( TRUE );
 549
 550     m_modalShowing = TRUE;
 551
 552     gtk_grab_add( m_widget );
 553     gtk_main();
 554     gtk_grab_remove( m_widget );
 555
 556     return GetReturnCode();
 557 }
 558
 559 void wxDialog::EndModal( int retCode )
 560 {
 561     SetReturnCode( retCode );
 562
 563     if (!IsModal())
 564     {
 565         wxFAIL_MSG( _T("wxDialog:EndModal called twice") );
 566         return;
 567     }
 568
 569     m_modalShowing = FALSE;
 570
 571     gtk_main_quit();
 572
 573     Show( FALSE );
 574 }
 575
 576 void wxDialog::InitDialog()
 577 {
 578     wxWindow::InitDialog();
 579 }
 580
 581 void wxDialog::SetIcon( const wxIcon &icon )
 582 {
 583     m_icon = icon;
 584     if (!icon.Ok()) return;
 585
 586     wxMask *mask = icon.GetMask();
 587     GdkBitmap *bm = (GdkBitmap *) NULL;
 588     if (mask) bm = mask->GetBitmap();
 589
 590     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 591 }