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     PreCreation( parent, id, pos, size, style, name );
 252
 253     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 254
 255     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 256
 257     if (!name.IsEmpty())
 258         gtk_window_set_wmclass( GTK_WINDOW(m_widget), name.mb_str(), name.mb_str() );
 259
 260     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 261
 262     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 263         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 264
 265     m_wxwindow = gtk_myfixed_new();
 266     gtk_widget_show( m_wxwindow );
 267     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 268
 269     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 270
 271     SetTitle( title );
 272
 273     if (m_parent) m_parent->AddChild( this );
 274
 275     PostCreation();
 276
 277     /*  we cannot set MWM hints  before the widget has
 278         been realized, so we do this directly after realization */
 279     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 280                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 281
 282     /* we set the position of the window after the map event. setting it
 283        before has no effect (with KWM) */
 284     gtk_signal_connect( GTK_OBJECT(m_widget), "map",
 285                         GTK_SIGNAL_FUNC(gtk_dialog_map_callback), (gpointer) this );
 286
 287     /* the user resized the frame by dragging etc. */
 288     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 289         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 290
 291     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 292         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 293
 294     return TRUE;
 295 }
 296
 297 wxDialog::~wxDialog()
 298 {
 299     m_isBeingDeleted = TRUE;
 300
 301     wxTopLevelWindows.DeleteObject( this );
 302
 303     if (wxTheApp->GetTopWindow() == this)
 304     {
 305         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 306     }
 307
 308     if (wxTopLevelWindows.Number() == 0)
 309     {
 310         wxTheApp->ExitMainLoop();
 311     }
 312 }
 313
 314 void wxDialog::SetTitle( const wxString& title )
 315 {
 316     m_title = title;
 317     if (m_title.IsNull()) m_title = _T("");
 318     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 319 }
 320
 321 wxString wxDialog::GetTitle() const
 322 {
 323     return (wxString&)m_title;
 324 }
 325
 326 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 327 {
 328     if (Validate()) TransferDataFromWindow();
 329 }
 330
 331 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 332 {
 333     if (IsModal())
 334     {
 335         EndModal(wxID_CANCEL);
 336     }
 337     else
 338     {
 339         SetReturnCode(wxID_CANCEL);
 340         Show(FALSE);
 341     }
 342 }
 343
 344 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 345 {
 346     if (Validate() && TransferDataFromWindow())
 347     {
 348         if (IsModal())
 349         {
 350             EndModal(wxID_OK);
 351         }
 352         else
 353         {
 354             SetReturnCode(wxID_OK);
 355             this->Show(FALSE);
 356         }
 357     }
 358 }
 359
 360 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 361 {
 362     // yes
 363 }
 364
 365 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 366 {
 367     // We'll send a Cancel message by default,
 368     // which may close the dialog.
 369     // Check for looping if the Cancel event handler calls Close().
 370
 371     // Note that if a cancel button and handler aren't present in the dialog,
 372     // nothing will happen when you close the dialog via the window manager, or
 373     // via Close().
 374     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 375     // created on the stack.
 376     // However, this does mean that calling dialog->Close() won't delete the dialog
 377     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 378     // sure to destroy the dialog.
 379     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 380
 381     static wxList s_closing;
 382
 383     if (s_closing.Member(this))
 384         return;   // no loops
 385
 386     s_closing.Append(this);
 387
 388     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 389     cancelEvent.SetEventObject( this );
 390     GetEventHandler()->ProcessEvent(cancelEvent);
 391     s_closing.DeleteObject(this);
 392 }
 393
 394 bool wxDialog::Destroy()
 395 {
 396     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 397
 398     return TRUE;
 399 }
 400
 401 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 402 {
 403     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 404
 405 #if wxUSE_CONSTRAINTS
 406     if (GetAutoLayout())
 407     {
 408         Layout();
 409     }
 410     else
 411 #endif // wxUSE_CONSTRAINTS
 412     {
 413         /* no child: go out ! */
 414         if (!GetChildren().First()) return;
 415
 416         /* do we have exactly one child? */
 417         wxWindow *child = (wxWindow *) NULL;
 418         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 419         {
 420             wxWindow *win = (wxWindow *)node->Data();
 421             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 422             {
 423                 /* it's the second one: do nothing */
 424                 if (child) return;
 425                 child = win;
 426             }
 427         }
 428
 429         /* yes: set it's size to fill all the frame */
 430         int client_x, client_y;
 431         GetClientSize( &client_x, &client_y );
 432         child->SetSize( 1, 1, client_x-2, client_y);
 433     }
 434 }
 435
 436 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 437 {
 438     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 439     wxASSERT_MSG( (m_wxwindow != NULL), _T("invalid dialog") );
 440
 441     if (m_resizing) return; /* I don't like recursions */
 442     m_resizing = TRUE;
 443
 444     int old_x = m_x;
 445     int old_y = m_y;
 446     int old_width = m_width;
 447     int old_height = m_height;
 448
 449     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 450     {
 451         if (x != -1) m_x = x;
 452         if (y != -1) m_y = y;
 453         if (width != -1) m_width = width;
 454         if (height != -1) m_height = height;
 455     }
 456     else
 457     {
 458         m_x = x;
 459         m_y = y;
 460         m_width = width;
 461         m_height = height;
 462     }
 463
 464     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 465     {
 466         if (width == -1) m_width = 80;
 467     }
 468
 469     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 470     {
 471        if (height == -1) m_height = 26;
 472     }
 473
 474     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 475     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 476     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 477     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 478
 479     if ((m_x != -1) || (m_y != -1))
 480     {
 481         if ((m_x != old_x) || (m_y != old_y))
 482         {
 483             /* we set the position here and when showing the dialog
 484                for the first time in idle time */
 485             gtk_widget_set_uposition( m_widget, m_x, m_y );
 486         }
 487     }
 488
 489     if ((m_width != old_width) || (m_height != old_height))
 490     {
 491         /* actual resizing is deferred to GtkOnSize in idle time and
 492            when showing the dialog */
 493         m_sizeSet = FALSE;
 494     }
 495
 496     m_resizing = FALSE;
 497 }
 498
 499 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 500 {
 501     // due to a bug in gtk, x,y are always 0
 502     // m_x = x;
 503     // m_y = y;
 504
 505     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 506     if (!m_wxwindow) return;
 507
 508     m_width = width;
 509     m_height = height;
 510
 511     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 512     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 513     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 514     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 515
 516     /* we actually set the size of a frame here and no-where else */
 517     gtk_widget_set_usize( m_widget, m_width, m_height );
 518
 519     m_sizeSet = TRUE;
 520
 521     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 522     event.SetEventObject( this );
 523     GetEventHandler()->ProcessEvent( event );
 524 }
 525
 526 void wxDialog::Centre( int direction )
 527 {
 528     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 529
 530     int x = 0;
 531     int y = 0;
 532
 533     if ((direction & wxHORIZONTAL) == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 534     if ((direction & wxVERTICAL) == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 535
 536     Move( x, y );
 537 }
 538
 539 void wxDialog::OnInternalIdle()
 540 {
 541     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 542         GtkOnSize( m_x, m_y, m_width, m_height );
 543 }
 544
 545 bool wxDialog::Show( bool show )
 546 {
 547     if (!show && IsModal())
 548     {
 549         EndModal( wxID_CANCEL );
 550     }
 551
 552     if (show && !m_sizeSet)
 553     {
 554         /* by calling GtkOnSize here, we don't have to call
 555            either after showing the frame, which would entail
 556            much ugly flicker nor from within the size_allocate
 557            handler, because GTK 1.1.X forbids that. */
 558
 559         GtkOnSize( m_x, m_y, m_width, m_height );
 560     }
 561
 562     bool ret = wxWindow::Show( show );
 563
 564     if (show) InitDialog();
 565
 566     return ret;
 567 }
 568
 569 bool wxDialog::IsModal() const
 570 {
 571     return m_modalShowing;
 572 }
 573
 574 void wxDialog::SetModal( bool WXUNUSED(flag) )
 575 {
 576 /*
 577   if (flag)
 578     m_windowStyle |= wxDIALOG_MODAL;
 579   else
 580     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 581 */
 582     wxFAIL_MSG( _T("wxDialog:SetModal obsolete now") );
 583 }
 584
 585 int wxDialog::ShowModal()
 586 {
 587     if (IsModal())
 588     {
 589        wxFAIL_MSG( _T("wxDialog:ShowModal called twice") );
 590        return GetReturnCode();
 591     }
 592
 593     Show( TRUE );
 594
 595     m_modalShowing = TRUE;
 596
 597     gtk_grab_add( m_widget );
 598     gtk_main();
 599     gtk_grab_remove( m_widget );
 600
 601     return GetReturnCode();
 602 }
 603
 604 void wxDialog::EndModal( int retCode )
 605 {
 606     SetReturnCode( retCode );
 607
 608     if (!IsModal())
 609     {
 610         wxFAIL_MSG( _T("wxDialog:EndModal called twice") );
 611         return;
 612     }
 613
 614     m_modalShowing = FALSE;
 615
 616     gtk_main_quit();
 617
 618     Show( FALSE );
 619 }
 620
 621 void wxDialog::InitDialog()
 622 {
 623     wxWindow::InitDialog();
 624 }
 625
 626 void wxDialog::SetIcon( const wxIcon &icon )
 627 {
 628     m_icon = icon;
 629     if (!icon.Ok()) return;
 630
 631     if (!m_widget->window) return;
 632
 633     wxMask *mask = icon.GetMask();
 634     GdkBitmap *bm = (GdkBitmap *) NULL;
 635     if (mask) bm = mask->GetBitmap();
 636
 637     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 638 }