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     if ((win->GetWindowStyle() & wxCAPTION) != 0)
 132         decor |= GDK_DECOR_TITLE;
 133     if ((win->GetWindowStyle() & wxSYSTEM_MENU) != 0)
 134     {
 135        decor |= GDK_DECOR_MENU;
 136        func |= GDK_FUNC_CLOSE;
 137     }
 138     if ((win->GetWindowStyle() & wxMINIMIZE_BOX) != 0)
 139     {
 140         func |= GDK_FUNC_MINIMIZE;
 141         decor |= GDK_DECOR_MINIMIZE;
 142     }
 143     if ((win->GetWindowStyle() & wxMAXIMIZE_BOX) != 0)
 144     {
 145         decor |= GDK_DECOR_MAXIMIZE;
 146         func |= GDK_FUNC_MAXIMIZE;
 147     }
 148     if ((win->GetWindowStyle() & wxRESIZE_BORDER) != 0)
 149     {
 150        func |= GDK_FUNC_RESIZE;
 151        decor |= GDK_DECOR_RESIZEH;
 152     }
 153     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 154     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 155
 156     /* GTK's shrinking/growing policy */
 157     if ((win->GetWindowStyle() & wxRESIZE_BORDER) == 0)
 158         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 159     else
 160         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 161
 162     /* set size hints */
 163     gint flag = GDK_HINT_POS;
 164     if ((win->GetMinWidth() != -1) || (win->GetMinHeight() != -1)) flag |= GDK_HINT_MIN_SIZE;
 165     if ((win->GetMaxWidth() != -1) || (win->GetMaxHeight() != -1)) flag |= GDK_HINT_MAX_SIZE;
 166     if (flag)
 167     {
 168         gdk_window_set_hints( win->m_widget->window,
 169                               win->m_x, win->m_y,
 170                               win->GetMinWidth(), win->GetMinHeight(),
 171                               win->GetMaxWidth(), win->GetMaxHeight(),
 172                               flag );
 173     }
 174
 175     /* reset the icon */
 176     if (win->m_icon != wxNullIcon)
 177     {
 178         wxIcon icon( win->m_icon );
 179         win->m_icon = wxNullIcon;
 180         win->SetIcon( icon );
 181     }
 182
 183     return FALSE;
 184 }
 185
 186 //-----------------------------------------------------------------------------
 187 // InsertChild for wxDialog
 188 //-----------------------------------------------------------------------------
 189
 190 /* Callback for wxFrame. This very strange beast has to be used because
 191  * C++ has no virtual methods in a constructor. We have to emulate a
 192  * virtual function here as wxWindows requires different ways to insert
 193  * a child in container classes. */
 194
 195 static void wxInsertChildInDialog( wxDialog* parent, wxWindow* child )
 196 {
 197     gtk_myfixed_put( GTK_MYFIXED(parent->m_wxwindow),
 198                      GTK_WIDGET(child->m_widget),
 199                      child->m_x,
 200                      child->m_y,
 201                      child->m_width,
 202                      child->m_height );
 203
 204     if (parent->HasFlag(wxTAB_TRAVERSAL))
 205     {
 206         /* we now allow a window to get the focus as long as it
 207            doesn't have any children. */
 208         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 209     }
 210 }
 211
 212 //-----------------------------------------------------------------------------
 213 // wxDialog
 214 //-----------------------------------------------------------------------------
 215
 216 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 217     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 218     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 219     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 220     EVT_SIZE    (wxDialog::OnSize)
 221     EVT_CLOSE   (wxDialog::OnCloseWindow)
 222 END_EVENT_TABLE()
 223
 224 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 225
 226 void wxDialog::Init()
 227 {
 228     m_returnCode = 0;
 229     m_sizeSet = FALSE;
 230     m_modalShowing = FALSE;
 231     m_isFrame = TRUE;
 232 }
 233
 234 wxDialog::wxDialog( wxWindow *parent,
 235                     wxWindowID id, const wxString &title,
 236                     const wxPoint &pos, const wxSize &size,
 237                     long style, const wxString &name )
 238 {
 239     Init();
 240
 241     Create( parent, id, title, pos, size, style, name );
 242 }
 243
 244 bool wxDialog::Create( wxWindow *parent,
 245                        wxWindowID id, const wxString &title,
 246                        const wxPoint &pos, const wxSize &size,
 247                        long style, const wxString &name )
 248 {
 249     wxTopLevelWindows.Append( this );
 250
 251     m_needParent = FALSE;
 252
 253     if (!PreCreation( parent, pos, size ) ||
 254         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 255     {
 256         wxFAIL_MSG( wxT("wxDialog creation failed") );
 257         return FALSE;
 258     }
 259
 260     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 261
 262     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 263
 264     if (!name.IsEmpty())
 265         gtk_window_set_wmclass( GTK_WINDOW(m_widget), name.mb_str(), name.mb_str() );
 266
 267     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 268
 269     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 270         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 271
 272     m_wxwindow = gtk_myfixed_new();
 273     gtk_widget_show( m_wxwindow );
 274     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 275
 276     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 277
 278     SetTitle( title );
 279
 280     if (m_parent) m_parent->AddChild( this );
 281
 282     PostCreation();
 283
 284     /*  we cannot set MWM hints  before the widget has
 285         been realized, so we do this directly after realization */
 286     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 287                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 288
 289     /* the user resized the frame by dragging etc. */
 290     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 291         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 292
 293     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 294         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 295
 296     return TRUE;
 297 }
 298
 299 wxDialog::~wxDialog()
 300 {
 301     m_isBeingDeleted = TRUE;
 302
 303     wxTopLevelWindows.DeleteObject( this );
 304
 305     if (wxTheApp->GetTopWindow() == this)
 306     {
 307         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 308     }
 309
 310     if (wxTopLevelWindows.Number() == 0)
 311     {
 312         wxTheApp->ExitMainLoop();
 313     }
 314 }
 315
 316 void wxDialog::SetTitle( const wxString& title )
 317 {
 318     m_title = title;
 319     if (m_title.IsNull()) m_title = wxT("");
 320     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 321 }
 322
 323 wxString wxDialog::GetTitle() const
 324 {
 325     return (wxString&)m_title;
 326 }
 327
 328 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 329 {
 330     if (Validate()) TransferDataFromWindow();
 331 }
 332
 333 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 334 {
 335     if (IsModal())
 336     {
 337         EndModal(wxID_CANCEL);
 338     }
 339     else
 340     {
 341         SetReturnCode(wxID_CANCEL);
 342         Show(FALSE);
 343     }
 344 }
 345
 346 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 347 {
 348     if (Validate() && TransferDataFromWindow())
 349     {
 350         if (IsModal())
 351         {
 352             EndModal(wxID_OK);
 353         }
 354         else
 355         {
 356             SetReturnCode(wxID_OK);
 357             this->Show(FALSE);
 358         }
 359     }
 360 }
 361
 362 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 363 {
 364     // yes
 365 }
 366
 367 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 368 {
 369     // We'll send a Cancel message by default,
 370     // which may close the dialog.
 371     // Check for looping if the Cancel event handler calls Close().
 372
 373     // Note that if a cancel button and handler aren't present in the dialog,
 374     // nothing will happen when you close the dialog via the window manager, or
 375     // via Close().
 376     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 377     // created on the stack.
 378     // However, this does mean that calling dialog->Close() won't delete the dialog
 379     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 380     // sure to destroy the dialog.
 381     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 382
 383     static wxList s_closing;
 384
 385     if (s_closing.Member(this))
 386         return;   // no loops
 387
 388     s_closing.Append(this);
 389
 390     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 391     cancelEvent.SetEventObject( this );
 392     GetEventHandler()->ProcessEvent(cancelEvent);
 393     s_closing.DeleteObject(this);
 394 }
 395
 396 bool wxDialog::Destroy()
 397 {
 398     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 399
 400     return TRUE;
 401 }
 402
 403 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 404 {
 405     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 406
 407 #if wxUSE_CONSTRAINTS
 408     if (GetAutoLayout())
 409     {
 410         Layout();
 411     }
 412     else
 413 #endif // wxUSE_CONSTRAINTS
 414     {
 415         /* no child: go out ! */
 416         if (!GetChildren().First()) return;
 417
 418         /* do we have exactly one child? */
 419         wxWindow *child = (wxWindow *) NULL;
 420         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 421         {
 422             wxWindow *win = (wxWindow *)node->Data();
 423             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 424             {
 425                 /* it's the second one: do nothing */
 426                 if (child) return;
 427                 child = win;
 428             }
 429         }
 430
 431         /* yes: set it's size to fill all the frame */
 432         int client_x, client_y;
 433         GetClientSize( &client_x, &client_y );
 434         child->SetSize( 1, 1, client_x-2, client_y);
 435     }
 436 }
 437
 438 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 439 {
 440     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 441     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid dialog") );
 442
 443     if (m_resizing) return; /* I don't like recursions */
 444     m_resizing = TRUE;
 445
 446     int old_x = m_x;
 447     int old_y = m_y;
 448     int old_width = m_width;
 449     int old_height = m_height;
 450
 451     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 452     {
 453         if (x != -1) m_x = x;
 454         if (y != -1) m_y = y;
 455         if (width != -1) m_width = width;
 456         if (height != -1) m_height = height;
 457     }
 458     else
 459     {
 460         m_x = x;
 461         m_y = y;
 462         m_width = width;
 463         m_height = height;
 464     }
 465
 466     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 467     {
 468         if (width == -1) m_width = 80;
 469     }
 470
 471     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 472     {
 473        if (height == -1) m_height = 26;
 474     }
 475
 476     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 477     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 478     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 479     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 480
 481     if ((m_x != -1) || (m_y != -1))
 482     {
 483         if ((m_x != old_x) || (m_y != old_y))
 484         {
 485             /* we set the position here and when showing the dialog
 486                for the first time in idle time */
 487             gtk_widget_set_uposition( m_widget, m_x, m_y );
 488         }
 489     }
 490
 491     if ((m_width != old_width) || (m_height != old_height))
 492     {
 493         /* actual resizing is deferred to GtkOnSize in idle time and
 494            when showing the dialog */
 495         m_sizeSet = FALSE;
 496     }
 497
 498     m_resizing = FALSE;
 499 }
 500
 501 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 502 {
 503     // due to a bug in gtk, x,y are always 0
 504     // m_x = x;
 505     // m_y = y;
 506
 507     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 508     if (!m_wxwindow) return;
 509
 510     m_width = width;
 511     m_height = height;
 512
 513     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 514     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 515     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 516     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 517
 518     /* we actually set the size of a frame here and no-where else */
 519     gtk_widget_set_usize( m_widget, m_width, m_height );
 520
 521     m_sizeSet = TRUE;
 522
 523     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 524     event.SetEventObject( this );
 525     GetEventHandler()->ProcessEvent( event );
 526 }
 527
 528 void wxDialog::OnInternalIdle()
 529 {
 530     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 531         GtkOnSize( m_x, m_y, m_width, m_height );
 532
 533     wxWindow::OnInternalIdle();
 534 }
 535
 536 bool wxDialog::Show( bool show )
 537 {
 538     if (!show && IsModal())
 539     {
 540         EndModal( wxID_CANCEL );
 541     }
 542
 543     if (show && !m_sizeSet)
 544     {
 545         /* by calling GtkOnSize here, we don't have to call
 546            either after showing the frame, which would entail
 547            much ugly flicker nor from within the size_allocate
 548            handler, because GTK 1.1.X forbids that. */
 549
 550         GtkOnSize( m_x, m_y, m_width, m_height );
 551     }
 552
 553     bool ret = wxWindow::Show( show );
 554
 555     if (show) InitDialog();
 556
 557     return ret;
 558 }
 559
 560 bool wxDialog::IsModal() const
 561 {
 562     return m_modalShowing;
 563 }
 564
 565 void wxDialog::SetModal( bool WXUNUSED(flag) )
 566 {
 567 /*
 568   if (flag)
 569     m_windowStyle |= wxDIALOG_MODAL;
 570   else
 571     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 572 */
 573     wxFAIL_MSG( wxT("wxDialog:SetModal obsolete now") );
 574 }
 575
 576 int wxDialog::ShowModal()
 577 {
 578     if (IsModal())
 579     {
 580        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 581        return GetReturnCode();
 582     }
 583
 584     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 585
 586     Show( TRUE );
 587
 588     m_modalShowing = TRUE;
 589
 590     gtk_grab_add( m_widget );
 591     gtk_main();
 592     gtk_grab_remove( m_widget );
 593
 594     return GetReturnCode();
 595 }
 596
 597 void wxDialog::EndModal( int retCode )
 598 {
 599     SetReturnCode( retCode );
 600
 601     if (!IsModal())
 602     {
 603         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 604         return;
 605     }
 606
 607     m_modalShowing = FALSE;
 608
 609     gtk_main_quit();
 610
 611     Show( FALSE );
 612 }
 613
 614 void wxDialog::InitDialog()
 615 {
 616     wxWindow::InitDialog();
 617 }
 618
 619 void wxDialog::SetIcon( const wxIcon &icon )
 620 {
 621     m_icon = icon;
 622     if (!icon.Ok()) return;
 623
 624     if (!m_widget->window) return;
 625
 626     wxMask *mask = icon.GetMask();
 627     GdkBitmap *bm = (GdkBitmap *) NULL;
 628     if (mask) bm = mask->GetBitmap();
 629
 630     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 631 }