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 #include "wx/cursor.h"
  22
  23 /*
  24 #include "gdk/gdkprivate.h"
  25 #include "gdk/gdkx.h"
  26 */
  27
  28 //-----------------------------------------------------------------------------
  29 // idle system
  30 //-----------------------------------------------------------------------------
  31
  32 extern void wxapp_install_idle_handler();
  33 extern bool g_isIdle;
  34
  35 //-----------------------------------------------------------------------------
  36 // data
  37 //-----------------------------------------------------------------------------
  38
  39 extern wxList wxPendingDelete;
  40
  41 //-----------------------------------------------------------------------------
  42 // "delete_event"
  43 //-----------------------------------------------------------------------------
  44
  45 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxDialog *win )
  46 {
  47     if (g_isIdle)
  48         wxapp_install_idle_handler();
  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)
  62         wxapp_install_idle_handler();
  63
  64     if (!win->m_hasVMT) return;
  65
  66     if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
  67     {
  68         win->m_width = alloc->width;
  69         win->m_height = alloc->height;
  70         win->UpdateSize();
  71     }
  72 }
  73
  74 //-----------------------------------------------------------------------------
  75 // "configure_event"
  76 //-----------------------------------------------------------------------------
  77
  78 static gint
  79 #if (GTK_MINOR_VERSON > 0)
  80 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDialog *win )
  81 #else
  82 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *event, wxDialog *win )
  83 #endif
  84 {
  85     if (g_isIdle)
  86         wxapp_install_idle_handler();
  87
  88     if (!win->m_hasVMT) return FALSE;
  89
  90 #if (GTK_MINOR_VERSON > 0)
  91     int x = 0;
  92     int y = 0;
  93     gdk_window_get_root_origin( win->m_widget->window, &x, &y );
  94     win->m_x = x;
  95     win->m_y = y;
  96 #else
  97     win->m_x = event->x;
  98     win->m_y = event->y;
  99 #endif
 100
 101     wxMoveEvent mevent( wxPoint(win->m_x,win->m_y), win->GetId() );
 102     mevent.SetEventObject( win );
 103     win->GetEventHandler()->ProcessEvent( mevent );
 104
 105     return FALSE;
 106 }
 107
 108 //-----------------------------------------------------------------------------
 109 // "realize" from m_widget
 110 //-----------------------------------------------------------------------------
 111
 112 /* we cannot MWM hints and icons before the widget has been realized,
 113    so we do this directly after realization */
 114
 115 static gint
 116 gtk_dialog_realized_callback( GtkWidget *widget, wxDialog *win )
 117 {
 118     if (g_isIdle)
 119         wxapp_install_idle_handler();
 120
 121     /* I haven't been able to set the position of
 122        the dialog before it is shown, so I set the
 123        position in "realize" */
 124     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 125
 126     /* all this is for Motif Window Manager "hints" and is supposed to be
 127        recognized by other WM as well. not tested. */
 128     long decor = (long) GDK_DECOR_BORDER;
 129     long func = (long) GDK_FUNC_MOVE ;
 130
 131     /* Some WM don't display any border around the frame contents if
 132        used with these hints, so we add a resize border around it,
 133        without automatically allowinng it to be resized though.
 134
 135        This avoids the problem, but looks odd. What shall we do?
 136     */
 137     decor |= GDK_DECOR_RESIZEH;
 138
 139     if ((win->GetWindowStyle() & wxCAPTION) != 0)
 140         decor |= GDK_DECOR_TITLE;
 141     if ((win->GetWindowStyle() & wxSYSTEM_MENU) != 0)
 142     {
 143        decor |= GDK_DECOR_MENU;
 144        func |= GDK_FUNC_CLOSE;
 145     }
 146     if ((win->GetWindowStyle() & wxMINIMIZE_BOX) != 0)
 147     {
 148         func |= GDK_FUNC_MINIMIZE;
 149         decor |= GDK_DECOR_MINIMIZE;
 150     }
 151     if ((win->GetWindowStyle() & wxMAXIMIZE_BOX) != 0)
 152     {
 153         decor |= GDK_DECOR_MAXIMIZE;
 154         func |= GDK_FUNC_MAXIMIZE;
 155     }
 156     if ((win->GetWindowStyle() & 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->GetWindowStyle() & 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     /* set size hints */
 171     gint flag = 0; // GDK_HINT_POS;
 172     if ((win->GetMinWidth() != -1) || (win->GetMinHeight() != -1)) flag |= GDK_HINT_MIN_SIZE;
 173     if ((win->GetMaxWidth() != -1) || (win->GetMaxHeight() != -1)) flag |= GDK_HINT_MAX_SIZE;
 174     if (flag)
 175     {
 176         gdk_window_set_hints( win->m_widget->window,
 177                               win->m_x, win->m_y,
 178                               win->GetMinWidth(), win->GetMinHeight(),
 179                               win->GetMaxWidth(), win->GetMaxHeight(),
 180                               flag );
 181     }
 182
 183     /* reset the icon */
 184     if (win->m_icon != wxNullIcon)
 185     {
 186         wxIcon icon( win->m_icon );
 187         win->m_icon = wxNullIcon;
 188         win->SetIcon( icon );
 189     }
 190
 191     return FALSE;
 192 }
 193
 194 //-----------------------------------------------------------------------------
 195 // InsertChild for wxDialog
 196 //-----------------------------------------------------------------------------
 197
 198 /* Callback for wxFrame. This very strange beast has to be used because
 199  * C++ has no virtual methods in a constructor. We have to emulate a
 200  * virtual function here as wxWindows requires different ways to insert
 201  * a child in container classes. */
 202
 203 static void wxInsertChildInDialog( wxDialog* parent, wxWindow* child )
 204 {
 205     gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
 206                      GTK_WIDGET(child->m_widget),
 207                      child->m_x,
 208                      child->m_y,
 209                      child->m_width,
 210                      child->m_height );
 211
 212     if (parent->HasFlag(wxTAB_TRAVERSAL))
 213     {
 214         /* we now allow a window to get the focus as long as it
 215            doesn't have any children. */
 216         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 217     }
 218 }
 219
 220 //-----------------------------------------------------------------------------
 221 // wxDialog
 222 //-----------------------------------------------------------------------------
 223
 224 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 225     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 226     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 227     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 228     EVT_SIZE    (wxDialog::OnSize)
 229     EVT_CLOSE   (wxDialog::OnCloseWindow)
 230 END_EVENT_TABLE()
 231
 232 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 233
 234 void wxDialog::Init()
 235 {
 236     m_returnCode = 0;
 237     m_sizeSet = FALSE;
 238     m_modalShowing = FALSE;
 239     m_isFrame = TRUE;
 240 }
 241
 242 wxDialog::wxDialog( wxWindow *parent,
 243                     wxWindowID id, const wxString &title,
 244                     const wxPoint &pos, const wxSize &size,
 245                     long style, const wxString &name )
 246 {
 247     Init();
 248
 249     Create( parent, id, title, pos, size, style, name );
 250 }
 251
 252 bool wxDialog::Create( wxWindow *parent,
 253                        wxWindowID id, const wxString &title,
 254                        const wxPoint &pos, const wxSize &size,
 255                        long style, const wxString &name )
 256 {
 257     wxTopLevelWindows.Append( this );
 258
 259     m_needParent = FALSE;
 260
 261     if (!PreCreation( parent, pos, size ) ||
 262         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 263     {
 264         wxFAIL_MSG( wxT("wxDialog creation failed") );
 265         return FALSE;
 266     }
 267
 268     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 269
 270     m_widget = gtk_window_new( GTK_WINDOW_DIALOG );
 271
 272     if ((m_parent) && (GTK_IS_WINDOW(m_parent->m_widget)))
 273         gtk_window_set_transient_for( GTK_WINDOW(m_widget), GTK_WINDOW(m_parent->m_widget) );
 274
 275     if (!name.IsEmpty())
 276         gtk_window_set_wmclass( GTK_WINDOW(m_widget), name.mb_str(), name.mb_str() );
 277
 278     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 279
 280     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 281         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 282
 283     m_wxwindow = gtk_pizza_new();
 284     gtk_widget_show( m_wxwindow );
 285     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 286
 287     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 288
 289     SetTitle( title );
 290
 291     if (m_parent) m_parent->AddChild( this );
 292
 293     PostCreation();
 294
 295     /*  we cannot set MWM hints  before the widget has
 296         been realized, so we do this directly after realization */
 297     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 298                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 299
 300     /* the user resized the frame by dragging etc. */
 301     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 302         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 303
 304     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 305         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 306
 307     return TRUE;
 308 }
 309
 310 wxDialog::~wxDialog()
 311 {
 312     m_isBeingDeleted = TRUE;
 313
 314     wxTopLevelWindows.DeleteObject( this );
 315
 316     if (wxTheApp->GetTopWindow() == this)
 317     {
 318         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 319     }
 320
 321     if (wxTopLevelWindows.Number() == 0)
 322     {
 323         wxTheApp->ExitMainLoop();
 324     }
 325 }
 326
 327 void wxDialog::SetTitle( const wxString& title )
 328 {
 329     m_title = title;
 330     if (m_title.IsNull()) m_title = wxT("");
 331     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 332 }
 333
 334 wxString wxDialog::GetTitle() const
 335 {
 336     return (wxString&)m_title;
 337 }
 338
 339 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 340 {
 341     if (Validate()) TransferDataFromWindow();
 342 }
 343
 344 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 345 {
 346     if (IsModal())
 347     {
 348         EndModal(wxID_CANCEL);
 349     }
 350     else
 351     {
 352         SetReturnCode(wxID_CANCEL);
 353         Show(FALSE);
 354     }
 355 }
 356
 357 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 358 {
 359     if (Validate() && TransferDataFromWindow())
 360     {
 361         if (IsModal())
 362         {
 363             EndModal(wxID_OK);
 364         }
 365         else
 366         {
 367             SetReturnCode(wxID_OK);
 368             this->Show(FALSE);
 369         }
 370     }
 371 }
 372
 373 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 374 {
 375     // yes
 376 }
 377
 378 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 379 {
 380     // We'll send a Cancel message by default,
 381     // which may close the dialog.
 382     // Check for looping if the Cancel event handler calls Close().
 383
 384     // Note that if a cancel button and handler aren't present in the dialog,
 385     // nothing will happen when you close the dialog via the window manager, or
 386     // via Close().
 387     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 388     // created on the stack.
 389     // However, this does mean that calling dialog->Close() won't delete the dialog
 390     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 391     // sure to destroy the dialog.
 392     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 393
 394     static wxList s_closing;
 395
 396     if (s_closing.Member(this))
 397         return;   // no loops
 398
 399     s_closing.Append(this);
 400
 401     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 402     cancelEvent.SetEventObject( this );
 403     GetEventHandler()->ProcessEvent(cancelEvent);
 404     s_closing.DeleteObject(this);
 405 }
 406
 407 bool wxDialog::Destroy()
 408 {
 409     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 410
 411     return TRUE;
 412 }
 413
 414 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 415 {
 416     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 417
 418 #if wxUSE_CONSTRAINTS
 419     if (GetAutoLayout())
 420     {
 421         Layout();
 422     }
 423     else
 424 #endif // wxUSE_CONSTRAINTS
 425     {
 426         /* no child: go out ! */
 427         if (!GetChildren().First()) return;
 428
 429         /* do we have exactly one child? */
 430         wxWindow *child = (wxWindow *) NULL;
 431         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 432         {
 433             wxWindow *win = (wxWindow *)node->Data();
 434             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 435             {
 436                 /* it's the second one: do nothing */
 437                 if (child) return;
 438                 child = win;
 439             }
 440         }
 441
 442         /* yes: set it's size to fill all the frame */
 443         int client_x, client_y;
 444         GetClientSize( &client_x, &client_y );
 445         child->SetSize( 1, 1, client_x-2, client_y);
 446     }
 447 }
 448
 449 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 450 {
 451     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 452     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid dialog") );
 453
 454     if (m_resizing) return; /* I don't like recursions */
 455     m_resizing = TRUE;
 456
 457     int old_x = m_x;
 458     int old_y = m_y;
 459
 460     int old_width = m_width;
 461     int old_height = m_height;
 462
 463     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 464     {
 465         if (x != -1) m_x = x;
 466         if (y != -1) m_y = y;
 467         if (width != -1) m_width = width;
 468         if (height != -1) m_height = height;
 469     }
 470     else
 471     {
 472         m_x = x;
 473         m_y = y;
 474         m_width = width;
 475         m_height = height;
 476     }
 477
 478 /*
 479     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 480     {
 481         if (width == -1) m_width = 80;
 482     }
 483
 484     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 485     {
 486        if (height == -1) m_height = 26;
 487     }
 488 */
 489
 490     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 491     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 492     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 493     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 494
 495     if ((m_x != -1) || (m_y != -1))
 496     {
 497         if ((m_x != old_x) || (m_y != old_y))
 498         {
 499             /* we set the position here and when showing the dialog
 500                for the first time in idle time */
 501             gtk_widget_set_uposition( m_widget, m_x, m_y );
 502         }
 503     }
 504
 505     if ((m_width != old_width) || (m_height != old_height))
 506     {
 507         /* actual resizing is deferred to GtkOnSize in idle time and
 508            when showing the dialog */
 509         m_sizeSet = FALSE;
 510     }
 511
 512     m_resizing = FALSE;
 513 }
 514
 515 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 516 {
 517     // due to a bug in gtk, x,y are always 0
 518     // m_x = x;
 519     // m_y = y;
 520
 521     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 522     if (!m_wxwindow) return;
 523
 524     m_width = width;
 525     m_height = height;
 526
 527     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 528     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 529     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 530     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 531
 532     /* we actually set the size of a frame here and no-where else */
 533     gtk_widget_set_usize( m_widget, m_width, m_height );
 534
 535     m_sizeSet = TRUE;
 536
 537     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 538     event.SetEventObject( this );
 539     GetEventHandler()->ProcessEvent( event );
 540 }
 541
 542 void wxDialog::OnInternalIdle()
 543 {
 544     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 545         GtkOnSize( m_x, m_y, m_width, m_height );
 546
 547     wxWindow::OnInternalIdle();
 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( wxT("wxDialog:SetModal obsolete now") );
 588 }
 589
 590 int wxDialog::ShowModal()
 591 {
 592     if (IsModal())
 593     {
 594        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 595        return GetReturnCode();
 596     }
 597
 598     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 599
 600     Show( TRUE );
 601
 602     m_modalShowing = TRUE;
 603
 604     gtk_grab_add( m_widget );
 605     gtk_main();
 606     gtk_grab_remove( m_widget );
 607
 608     return GetReturnCode();
 609 }
 610
 611 void wxDialog::EndModal( int retCode )
 612 {
 613     SetReturnCode( retCode );
 614
 615     if (!IsModal())
 616     {
 617         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 618         return;
 619     }
 620
 621     m_modalShowing = FALSE;
 622
 623     gtk_main_quit();
 624
 625     Show( FALSE );
 626 }
 627
 628 void wxDialog::InitDialog()
 629 {
 630     wxWindow::InitDialog();
 631 }
 632
 633 void wxDialog::SetIcon( const wxIcon &icon )
 634 {
 635     m_icon = icon;
 636     if (!icon.Ok()) return;
 637
 638     if (!m_widget->window) return;
 639
 640     wxMask *mask = icon.GetMask();
 641     GdkBitmap *bm = (GdkBitmap *) NULL;
 642     if (mask) bm = mask->GetBitmap();
 643
 644     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 645 }