src/gtk1/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" and "map" */
 124     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 125
 126     /* set size hints */
 127     gint flag = GDK_HINT_POS;
 128     if ((win->GetMinWidth() != -1) || (win->GetMinHeight() != -1)) flag |= GDK_HINT_MIN_SIZE;
 129     if ((win->GetMaxWidth() != -1) || (win->GetMaxHeight() != -1)) flag |= GDK_HINT_MAX_SIZE;
 130     if (flag)
 131     {
 132         gdk_window_set_hints( win->m_widget->window,
 133                               win->m_x, win->m_y,
 134                               win->GetMinWidth(), win->GetMinHeight(),
 135                               win->GetMaxWidth(), win->GetMaxHeight(),
 136                               flag );
 137     }
 138
 139     /* reset the icon */
 140     if (win->m_icon != wxNullIcon)
 141     {
 142         wxIcon icon( win->m_icon );
 143         win->m_icon = wxNullIcon;
 144         win->SetIcon( icon );
 145     }
 146
 147     return FALSE;
 148 }
 149
 150 //-----------------------------------------------------------------------------
 151 // "map" from m_widget
 152 //-----------------------------------------------------------------------------
 153
 154 static gint
 155 gtk_dialog_map_callback( GtkWidget *widget, wxDialog *win )
 156 {
 157     if (g_isIdle)
 158         wxapp_install_idle_handler();
 159
 160     /* I haven''t been able to set the position of
 161        the dialog before it is shown, so I set the
 162        position in "realize" and "map" */
 163     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 164
 165     /* all this is for Motif Window Manager "hints" and is supposed to be
 166        recognized by other WM as well. not tested. */
 167     long decor = (long) GDK_DECOR_BORDER;
 168     long func = (long) GDK_FUNC_MOVE ;
 169
 170     if ((win->GetWindowStyle() & wxCAPTION) != 0)
 171         decor |= GDK_DECOR_TITLE;
 172     if ((win->GetWindowStyle() & wxSYSTEM_MENU) != 0)
 173     {
 174        decor |= GDK_DECOR_MENU;
 175        func |= GDK_FUNC_CLOSE;
 176     }
 177     if ((win->GetWindowStyle() & wxMINIMIZE_BOX) != 0)
 178     {
 179         func |= GDK_FUNC_MINIMIZE;
 180         decor |= GDK_DECOR_MINIMIZE;
 181     }
 182     if ((win->GetWindowStyle() & wxMAXIMIZE_BOX) != 0)
 183     {
 184         decor |= GDK_DECOR_MAXIMIZE;
 185         func |= GDK_FUNC_MAXIMIZE;
 186     }
 187     if ((win->GetWindowStyle() & wxRESIZE_BORDER) != 0)
 188     {
 189        func |= GDK_FUNC_RESIZE;
 190        decor |= GDK_DECOR_RESIZEH;
 191     }
 192     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 193     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 194
 195     /* GTK's shrinking/growing policy */
 196     if ((win->GetWindowStyle() & wxRESIZE_BORDER) == 0)
 197         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 198     else
 199         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 200
 201     return FALSE;
 202 }
 203
 204 //-----------------------------------------------------------------------------
 205 // InsertChild for wxDialog
 206 //-----------------------------------------------------------------------------
 207
 208 /* Callback for wxFrame. This very strange beast has to be used because
 209  * C++ has no virtual methods in a constructor. We have to emulate a
 210  * virtual function here as wxWindows requires different ways to insert
 211  * a child in container classes. */
 212
 213 static void wxInsertChildInDialog( wxDialog* parent, wxWindow* child )
 214 {
 215     gtk_myfixed_put( GTK_MYFIXED(parent->m_wxwindow),
 216                      GTK_WIDGET(child->m_widget),
 217                      child->m_x,
 218                      child->m_y,
 219                      child->m_width,
 220                      child->m_height );
 221
 222     if (parent->HasFlag(wxTAB_TRAVERSAL))
 223     {
 224         /* we now allow a window to get the focus as long as it
 225            doesn't have any children. */
 226         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 227     }
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // wxDialog
 232 //-----------------------------------------------------------------------------
 233
 234 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 235     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 236     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 237     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 238     EVT_SIZE    (wxDialog::OnSize)
 239     EVT_CLOSE   (wxDialog::OnCloseWindow)
 240 END_EVENT_TABLE()
 241
 242 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 243
 244 void wxDialog::Init()
 245 {
 246     m_returnCode = 0;
 247     m_sizeSet = FALSE;
 248     m_modalShowing = FALSE;
 249     m_isFrame = TRUE;
 250 }
 251
 252 wxDialog::wxDialog( wxWindow *parent,
 253                     wxWindowID id, const wxString &title,
 254                     const wxPoint &pos, const wxSize &size,
 255                     long style, const wxString &name )
 256 {
 257     Init();
 258
 259     Create( parent, id, title, pos, size, style, name );
 260 }
 261
 262 bool wxDialog::Create( wxWindow *parent,
 263                        wxWindowID id, const wxString &title,
 264                        const wxPoint &pos, const wxSize &size,
 265                        long style, const wxString &name )
 266 {
 267     wxTopLevelWindows.Append( this );
 268
 269     m_needParent = FALSE;
 270
 271     if (!PreCreation( parent, pos, size ) ||
 272         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 273     {
 274         wxFAIL_MSG( wxT("wxDialog creation failed") );
 275         return FALSE;
 276     }
 277
 278     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 279
 280     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 281
 282     if (!name.IsEmpty())
 283         gtk_window_set_wmclass( GTK_WINDOW(m_widget), name.mb_str(), name.mb_str() );
 284
 285     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 286
 287     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 288         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 289
 290     m_wxwindow = gtk_myfixed_new();
 291     gtk_widget_show( m_wxwindow );
 292     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 293
 294     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 295
 296     SetTitle( title );
 297
 298     if (m_parent) m_parent->AddChild( this );
 299
 300     PostCreation();
 301
 302     /*  we cannot set MWM hints  before the widget has
 303         been realized, so we do this directly after realization */
 304     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 305                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 306
 307     /* we set the position of the window after the map event. setting it
 308        before has no effect (with KWM) */
 309     gtk_signal_connect( GTK_OBJECT(m_widget), "map",
 310                         GTK_SIGNAL_FUNC(gtk_dialog_map_callback), (gpointer) this );
 311
 312     /* the user resized the frame by dragging etc. */
 313     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 314         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 315
 316     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 317         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 318
 319     return TRUE;
 320 }
 321
 322 wxDialog::~wxDialog()
 323 {
 324     m_isBeingDeleted = TRUE;
 325
 326     wxTopLevelWindows.DeleteObject( this );
 327
 328     if (wxTheApp->GetTopWindow() == this)
 329     {
 330         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 331     }
 332
 333     if (wxTopLevelWindows.Number() == 0)
 334     {
 335         wxTheApp->ExitMainLoop();
 336     }
 337 }
 338
 339 void wxDialog::SetTitle( const wxString& title )
 340 {
 341     m_title = title;
 342     if (m_title.IsNull()) m_title = wxT("");
 343     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 344 }
 345
 346 wxString wxDialog::GetTitle() const
 347 {
 348     return (wxString&)m_title;
 349 }
 350
 351 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 352 {
 353     if (Validate()) TransferDataFromWindow();
 354 }
 355
 356 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 357 {
 358     if (IsModal())
 359     {
 360         EndModal(wxID_CANCEL);
 361     }
 362     else
 363     {
 364         SetReturnCode(wxID_CANCEL);
 365         Show(FALSE);
 366     }
 367 }
 368
 369 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 370 {
 371     if (Validate() && TransferDataFromWindow())
 372     {
 373         if (IsModal())
 374         {
 375             EndModal(wxID_OK);
 376         }
 377         else
 378         {
 379             SetReturnCode(wxID_OK);
 380             this->Show(FALSE);
 381         }
 382     }
 383 }
 384
 385 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 386 {
 387     // yes
 388 }
 389
 390 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 391 {
 392     // We'll send a Cancel message by default,
 393     // which may close the dialog.
 394     // Check for looping if the Cancel event handler calls Close().
 395
 396     // Note that if a cancel button and handler aren't present in the dialog,
 397     // nothing will happen when you close the dialog via the window manager, or
 398     // via Close().
 399     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 400     // created on the stack.
 401     // However, this does mean that calling dialog->Close() won't delete the dialog
 402     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 403     // sure to destroy the dialog.
 404     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 405
 406     static wxList s_closing;
 407
 408     if (s_closing.Member(this))
 409         return;   // no loops
 410
 411     s_closing.Append(this);
 412
 413     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 414     cancelEvent.SetEventObject( this );
 415     GetEventHandler()->ProcessEvent(cancelEvent);
 416     s_closing.DeleteObject(this);
 417 }
 418
 419 bool wxDialog::Destroy()
 420 {
 421     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 422
 423     return TRUE;
 424 }
 425
 426 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 427 {
 428     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 429
 430 #if wxUSE_CONSTRAINTS
 431     if (GetAutoLayout())
 432     {
 433         Layout();
 434     }
 435     else
 436 #endif // wxUSE_CONSTRAINTS
 437     {
 438         /* no child: go out ! */
 439         if (!GetChildren().First()) return;
 440
 441         /* do we have exactly one child? */
 442         wxWindow *child = (wxWindow *) NULL;
 443         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 444         {
 445             wxWindow *win = (wxWindow *)node->Data();
 446             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 447             {
 448                 /* it's the second one: do nothing */
 449                 if (child) return;
 450                 child = win;
 451             }
 452         }
 453
 454         /* yes: set it's size to fill all the frame */
 455         int client_x, client_y;
 456         GetClientSize( &client_x, &client_y );
 457         child->SetSize( 1, 1, client_x-2, client_y);
 458     }
 459 }
 460
 461 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 462 {
 463     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 464     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid dialog") );
 465
 466     if (m_resizing) return; /* I don't like recursions */
 467     m_resizing = TRUE;
 468
 469     int old_x = m_x;
 470     int old_y = m_y;
 471     int old_width = m_width;
 472     int old_height = m_height;
 473
 474     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 475     {
 476         if (x != -1) m_x = x;
 477         if (y != -1) m_y = y;
 478         if (width != -1) m_width = width;
 479         if (height != -1) m_height = height;
 480     }
 481     else
 482     {
 483         m_x = x;
 484         m_y = y;
 485         m_width = width;
 486         m_height = height;
 487     }
 488
 489     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 490     {
 491         if (width == -1) m_width = 80;
 492     }
 493
 494     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 495     {
 496        if (height == -1) m_height = 26;
 497     }
 498
 499     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 500     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 501     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 502     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 503
 504     if ((m_x != -1) || (m_y != -1))
 505     {
 506         if ((m_x != old_x) || (m_y != old_y))
 507         {
 508             /* we set the position here and when showing the dialog
 509                for the first time in idle time */
 510             gtk_widget_set_uposition( m_widget, m_x, m_y );
 511         }
 512     }
 513
 514     if ((m_width != old_width) || (m_height != old_height))
 515     {
 516         /* actual resizing is deferred to GtkOnSize in idle time and
 517            when showing the dialog */
 518         m_sizeSet = FALSE;
 519     }
 520
 521     m_resizing = FALSE;
 522 }
 523
 524 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 525 {
 526     // due to a bug in gtk, x,y are always 0
 527     // m_x = x;
 528     // m_y = y;
 529
 530     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 531     if (!m_wxwindow) return;
 532
 533     m_width = width;
 534     m_height = height;
 535
 536     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 537     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 538     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 539     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 540
 541     /* we actually set the size of a frame here and no-where else */
 542     gtk_widget_set_usize( m_widget, m_width, m_height );
 543
 544     m_sizeSet = TRUE;
 545
 546     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 547     event.SetEventObject( this );
 548     GetEventHandler()->ProcessEvent( event );
 549 }
 550
 551 void wxDialog::OnInternalIdle()
 552 {
 553     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 554         GtkOnSize( m_x, m_y, m_width, m_height );
 555
 556     wxWindow::OnInternalIdle();
 557 }
 558
 559 bool wxDialog::Show( bool show )
 560 {
 561     if (!show && IsModal())
 562     {
 563         EndModal( wxID_CANCEL );
 564     }
 565
 566     if (show && !m_sizeSet)
 567     {
 568         /* by calling GtkOnSize here, we don't have to call
 569            either after showing the frame, which would entail
 570            much ugly flicker nor from within the size_allocate
 571            handler, because GTK 1.1.X forbids that. */
 572
 573         GtkOnSize( m_x, m_y, m_width, m_height );
 574     }
 575
 576     bool ret = wxWindow::Show( show );
 577
 578     if (show) InitDialog();
 579
 580     return ret;
 581 }
 582
 583 bool wxDialog::IsModal() const
 584 {
 585     return m_modalShowing;
 586 }
 587
 588 void wxDialog::SetModal( bool WXUNUSED(flag) )
 589 {
 590 /*
 591   if (flag)
 592     m_windowStyle |= wxDIALOG_MODAL;
 593   else
 594     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 595 */
 596     wxFAIL_MSG( wxT("wxDialog:SetModal obsolete now") );
 597 }
 598
 599 int wxDialog::ShowModal()
 600 {
 601     if (IsModal())
 602     {
 603        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 604        return GetReturnCode();
 605     }
 606
 607     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 608
 609     Show( TRUE );
 610
 611     m_modalShowing = TRUE;
 612
 613     gtk_grab_add( m_widget );
 614     gtk_main();
 615     gtk_grab_remove( m_widget );
 616
 617     return GetReturnCode();
 618 }
 619
 620 void wxDialog::EndModal( int retCode )
 621 {
 622     SetReturnCode( retCode );
 623
 624     if (!IsModal())
 625     {
 626         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 627         return;
 628     }
 629
 630     m_modalShowing = FALSE;
 631
 632     gtk_main_quit();
 633
 634     Show( FALSE );
 635 }
 636
 637 void wxDialog::InitDialog()
 638 {
 639     wxWindow::InitDialog();
 640 }
 641
 642 void wxDialog::SetIcon( const wxIcon &icon )
 643 {
 644     m_icon = icon;
 645     if (!icon.Ok()) return;
 646
 647     if (!m_widget->window) return;
 648
 649     wxMask *mask = icon.GetMask();
 650     GdkBitmap *bm = (GdkBitmap *) NULL;
 651     if (mask) bm = mask->GetBitmap();
 652
 653     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 654 }