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 #include "wx/cursor.h"
  18
  19 #include "gdk/gdk.h"
  20 #include "gtk/gtk.h"
  21 #include "gdk/gdkkeysyms.h"
  22 #include "wx/gtk/win_gtk.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // idle system
  26 //-----------------------------------------------------------------------------
  27
  28 extern void wxapp_install_idle_handler();
  29 extern bool g_isIdle;
  30 extern int g_openDialogs;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern wxList wxPendingDelete;
  37
  38 //-----------------------------------------------------------------------------
  39 // "focus" from m_window
  40 //-----------------------------------------------------------------------------
  41
  42 static gint gtk_dialog_focus_callback( GtkWidget *widget, GtkDirectionType WXUNUSED(d), wxWindow *WXUNUSED(win) )
  43 {
  44     if (g_isIdle)
  45         wxapp_install_idle_handler();
  46
  47     // This disables GTK's tab traversal
  48     gtk_signal_emit_stop_by_name( GTK_OBJECT(widget), "focus" );
  49     return TRUE;
  50 }
  51
  52 //-----------------------------------------------------------------------------
  53 // "delete_event"
  54 //-----------------------------------------------------------------------------
  55
  56 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxDialog *win )
  57 {
  58     if (g_isIdle)
  59         wxapp_install_idle_handler();
  60
  61     win->Close();
  62
  63     return TRUE;
  64 }
  65
  66 //-----------------------------------------------------------------------------
  67 // "size_allocate"
  68 //-----------------------------------------------------------------------------
  69
  70 static void gtk_dialog_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxDialog *win )
  71 {
  72     if (g_isIdle)
  73         wxapp_install_idle_handler();
  74
  75     if (!win->m_hasVMT) return;
  76
  77     if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
  78     {
  79         win->m_width = alloc->width;
  80         win->m_height = alloc->height;
  81         win->UpdateSize();
  82     }
  83 }
  84
  85 //-----------------------------------------------------------------------------
  86 // "configure_event"
  87 //-----------------------------------------------------------------------------
  88
  89 static gint
  90 #if (GTK_MINOR_VERSION > 0)
  91 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDialog *win )
  92 #else
  93 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *event, wxDialog *win )
  94 #endif
  95 {
  96     if (g_isIdle)
  97         wxapp_install_idle_handler();
  98
  99     if (!win->m_hasVMT) return FALSE;
 100
 101 #if (GTK_MINOR_VERSION > 0)
 102     int x = 0;
 103     int y = 0;
 104     gdk_window_get_root_origin( win->m_widget->window, &x, &y );
 105     win->m_x = x;
 106     win->m_y = y;
 107 #else
 108     win->m_x = event->x;
 109     win->m_y = event->y;
 110 #endif
 111
 112     wxMoveEvent mevent( wxPoint(win->m_x,win->m_y), win->GetId() );
 113     mevent.SetEventObject( win );
 114     win->GetEventHandler()->ProcessEvent( mevent );
 115
 116     return FALSE;
 117 }
 118
 119 //-----------------------------------------------------------------------------
 120 // "realize" from m_widget
 121 //-----------------------------------------------------------------------------
 122
 123 /* we cannot MWM hints and icons before the widget has been realized,
 124    so we do this directly after realization */
 125
 126 static gint
 127 gtk_dialog_realized_callback( GtkWidget *widget, wxDialog *win )
 128 {
 129     if (g_isIdle)
 130         wxapp_install_idle_handler();
 131
 132     /* I haven't been able to set the position of
 133        the dialog before it is shown, so I set the
 134        position in "realize" */
 135     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 136
 137     /* all this is for Motif Window Manager "hints" and is supposed to be
 138        recognized by other WM as well. not tested. */
 139     long decor = (long) GDK_DECOR_BORDER;
 140     long func = (long) GDK_FUNC_MOVE ;
 141
 142     /* Some WM don't display any border around the frame contents if
 143        used with these hints, so we add a resize border around it,
 144        without automatically allowinng it to be resized though.
 145
 146        This avoids the problem, but looks odd. What shall we do?
 147     */
 148     decor |= GDK_DECOR_RESIZEH;
 149
 150     if ((win->GetWindowStyle() & wxCAPTION) != 0)
 151         decor |= GDK_DECOR_TITLE;
 152     if ((win->GetWindowStyle() & wxSYSTEM_MENU) != 0)
 153     {
 154        decor |= GDK_DECOR_MENU;
 155        func |= GDK_FUNC_CLOSE;
 156     }
 157     if ((win->GetWindowStyle() & wxMINIMIZE_BOX) != 0)
 158     {
 159         func |= GDK_FUNC_MINIMIZE;
 160         decor |= GDK_DECOR_MINIMIZE;
 161     }
 162     if ((win->GetWindowStyle() & wxMAXIMIZE_BOX) != 0)
 163     {
 164         decor |= GDK_DECOR_MAXIMIZE;
 165         func |= GDK_FUNC_MAXIMIZE;
 166     }
 167     if ((win->GetWindowStyle() & wxRESIZE_BORDER) != 0)
 168     {
 169        func |= GDK_FUNC_RESIZE;
 170        decor |= GDK_DECOR_RESIZEH;
 171     }
 172     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 173     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 174
 175     /* GTK's shrinking/growing policy */
 176     if ((win->GetWindowStyle() & wxRESIZE_BORDER) == 0)
 177         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 178     else
 179         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 180
 181     /* set size hints */
 182     gint flag = 0; // GDK_HINT_POS;
 183     if ((win->GetMinWidth() != -1) || (win->GetMinHeight() != -1)) flag |= GDK_HINT_MIN_SIZE;
 184     if ((win->GetMaxWidth() != -1) || (win->GetMaxHeight() != -1)) flag |= GDK_HINT_MAX_SIZE;
 185     if (flag)
 186     {
 187         gdk_window_set_hints( win->m_widget->window,
 188                               win->m_x, win->m_y,
 189                               win->GetMinWidth(), win->GetMinHeight(),
 190                               win->GetMaxWidth(), win->GetMaxHeight(),
 191                               flag );
 192     }
 193
 194     /* reset the icon */
 195     if (win->m_icon != wxNullIcon)
 196     {
 197         wxIcon icon( win->m_icon );
 198         win->m_icon = wxNullIcon;
 199         win->SetIcon( icon );
 200     }
 201
 202     return FALSE;
 203 }
 204
 205 //-----------------------------------------------------------------------------
 206 // InsertChild for wxDialog
 207 //-----------------------------------------------------------------------------
 208
 209 /* Callback for wxFrame. This very strange beast has to be used because
 210  * C++ has no virtual methods in a constructor. We have to emulate a
 211  * virtual function here as wxWindows requires different ways to insert
 212  * a child in container classes. */
 213
 214 static void wxInsertChildInDialog( wxDialog* parent, wxWindow* child )
 215 {
 216     gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
 217                      GTK_WIDGET(child->m_widget),
 218                      child->m_x,
 219                      child->m_y,
 220                      child->m_width,
 221                      child->m_height );
 222
 223     if (parent->HasFlag(wxTAB_TRAVERSAL))
 224     {
 225         /* we now allow a window to get the focus as long as it
 226            doesn't have any children. */
 227         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 228     }
 229 }
 230
 231 //-----------------------------------------------------------------------------
 232 // wxDialog
 233 //-----------------------------------------------------------------------------
 234
 235 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 236     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 237     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 238     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 239     EVT_SIZE    (wxDialog::OnSize)
 240     EVT_CLOSE   (wxDialog::OnCloseWindow)
 241 END_EVENT_TABLE()
 242
 243 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 244
 245 void wxDialog::Init()
 246 {
 247     m_returnCode = 0;
 248     m_sizeSet = FALSE;
 249     m_modalShowing = FALSE;
 250     m_isFrame = TRUE;
 251 }
 252
 253 wxDialog::wxDialog( wxWindow *parent,
 254                     wxWindowID id, const wxString &title,
 255                     const wxPoint &pos, const wxSize &size,
 256                     long style, const wxString &name )
 257 {
 258     Init();
 259
 260     Create( parent, id, title, pos, size, style, name );
 261 }
 262
 263 bool wxDialog::Create( wxWindow *parent,
 264                        wxWindowID id, const wxString &title,
 265                        const wxPoint &pos, const wxSize &size,
 266                        long style, const wxString &name )
 267 {
 268     g_openDialogs++;
 269
 270     wxTopLevelWindows.Append( this );
 271
 272     m_needParent = FALSE;
 273
 274     if (!PreCreation( parent, pos, size ) ||
 275         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 276     {
 277         wxFAIL_MSG( wxT("wxDialog creation failed") );
 278         return FALSE;
 279     }
 280
 281     // All dialogs should really have this style
 282     m_windowStyle |= wxTAB_TRAVERSAL;
 283
 284     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 285
 286     m_widget = gtk_window_new( GTK_WINDOW_DIALOG );
 287
 288     if ((m_parent) && (GTK_IS_WINDOW(m_parent->m_widget)))
 289         gtk_window_set_transient_for( GTK_WINDOW(m_widget), GTK_WINDOW(m_parent->m_widget) );
 290
 291     if (!name.IsEmpty())
 292         gtk_window_set_wmclass( GTK_WINDOW(m_widget), name.mb_str(), name.mb_str() );
 293
 294     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 295
 296     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 297         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 298
 299     m_wxwindow = gtk_pizza_new();
 300     gtk_widget_show( m_wxwindow );
 301     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 302
 303     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 304
 305     SetTitle( title );
 306
 307     if (m_parent) m_parent->AddChild( this );
 308
 309     PostCreation();
 310
 311     /*  we cannot set MWM hints  before the widget has
 312         been realized, so we do this directly after realization */
 313     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 314                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 315
 316     /* the user resized the frame by dragging etc. */
 317     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 318         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 319
 320     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 321         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 322
 323     /* disable native tab traversal */
 324     gtk_signal_connect( GTK_OBJECT(m_widget), "focus",
 325         GTK_SIGNAL_FUNC(gtk_dialog_focus_callback), (gpointer)this );
 326
 327     return TRUE;
 328 }
 329
 330 wxDialog::~wxDialog()
 331 {
 332     m_isBeingDeleted = TRUE;
 333
 334     wxTopLevelWindows.DeleteObject( this );
 335
 336     if (wxTheApp->GetTopWindow() == this)
 337     {
 338         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 339     }
 340
 341     if (wxTopLevelWindows.Number() == 0)
 342     {
 343         wxTheApp->ExitMainLoop();
 344     }
 345
 346     g_openDialogs--;
 347 }
 348
 349 void wxDialog::SetTitle( const wxString& title )
 350 {
 351     m_title = title;
 352     if (m_title.IsNull()) m_title = wxT("");
 353     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 354 }
 355
 356 wxString wxDialog::GetTitle() const
 357 {
 358     return (wxString&)m_title;
 359 }
 360
 361 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 362 {
 363     if (Validate()) TransferDataFromWindow();
 364 }
 365
 366 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 367 {
 368     if (IsModal())
 369     {
 370         EndModal(wxID_CANCEL);
 371     }
 372     else
 373     {
 374         SetReturnCode(wxID_CANCEL);
 375         Show(FALSE);
 376     }
 377 }
 378
 379 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 380 {
 381     if (Validate() && TransferDataFromWindow())
 382     {
 383         if (IsModal())
 384         {
 385             EndModal(wxID_OK);
 386         }
 387         else
 388         {
 389             SetReturnCode(wxID_OK);
 390             this->Show(FALSE);
 391         }
 392     }
 393 }
 394
 395 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 396 {
 397     // yes
 398 }
 399
 400 void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 401 {
 402     // We'll send a Cancel message by default,
 403     // which may close the dialog.
 404     // Check for looping if the Cancel event handler calls Close().
 405
 406     // Note that if a cancel button and handler aren't present in the dialog,
 407     // nothing will happen when you close the dialog via the window manager, or
 408     // via Close().
 409     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 410     // created on the stack.
 411     // However, this does mean that calling dialog->Close() won't delete the dialog
 412     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 413     // sure to destroy the dialog.
 414     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 415
 416     static wxList s_closing;
 417
 418     if (s_closing.Member(this))
 419         return;   // no loops
 420
 421     s_closing.Append(this);
 422
 423     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 424     cancelEvent.SetEventObject( this );
 425     GetEventHandler()->ProcessEvent(cancelEvent);
 426     s_closing.DeleteObject(this);
 427 }
 428
 429 bool wxDialog::Destroy()
 430 {
 431     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 432
 433     return TRUE;
 434 }
 435
 436 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 437 {
 438     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 439
 440 #if wxUSE_CONSTRAINTS
 441     if (GetAutoLayout())
 442     {
 443         Layout();
 444     }
 445     else
 446 #endif // wxUSE_CONSTRAINTS
 447     {
 448         /* no child: go out ! */
 449         if (!GetChildren().First()) return;
 450
 451         /* do we have exactly one child? */
 452         wxWindow *child = (wxWindow *) NULL;
 453         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 454         {
 455             wxWindow *win = (wxWindow *)node->Data();
 456             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 457             {
 458                 /* it's the second one: do nothing */
 459                 if (child) return;
 460                 child = win;
 461             }
 462         }
 463
 464         /* yes: set it's size to fill all the frame */
 465         int client_x, client_y;
 466         GetClientSize( &client_x, &client_y );
 467         child->SetSize( 1, 1, client_x-2, client_y);
 468     }
 469 }
 470
 471 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 472 {
 473     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 474     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid dialog") );
 475
 476     if (m_resizing) return; /* I don't like recursions */
 477     m_resizing = TRUE;
 478
 479     int old_x = m_x;
 480     int old_y = m_y;
 481
 482     int old_width = m_width;
 483     int old_height = m_height;
 484
 485     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 486     {
 487         if (x != -1) m_x = x;
 488         if (y != -1) m_y = y;
 489         if (width != -1) m_width = width;
 490         if (height != -1) m_height = height;
 491     }
 492     else
 493     {
 494         m_x = x;
 495         m_y = y;
 496         m_width = width;
 497         m_height = height;
 498     }
 499
 500 /*
 501     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 502     {
 503         if (width == -1) m_width = 80;
 504     }
 505
 506     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 507     {
 508        if (height == -1) m_height = 26;
 509     }
 510 */
 511
 512     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 513     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 514     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 515     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 516
 517     if ((m_x != -1) || (m_y != -1))
 518     {
 519         if ((m_x != old_x) || (m_y != old_y))
 520         {
 521             /* we set the position here and when showing the dialog
 522                for the first time in idle time */
 523             gtk_widget_set_uposition( m_widget, m_x, m_y );
 524         }
 525     }
 526
 527     if ((m_width != old_width) || (m_height != old_height))
 528     {
 529         /* actual resizing is deferred to GtkOnSize in idle time and
 530            when showing the dialog */
 531         m_sizeSet = FALSE;
 532     }
 533
 534     m_resizing = FALSE;
 535 }
 536
 537 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 538 {
 539     // due to a bug in gtk, x,y are always 0
 540     // m_x = x;
 541     // m_y = y;
 542
 543     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 544     if (!m_wxwindow) return;
 545
 546     m_width = width;
 547     m_height = height;
 548
 549     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 550     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 551     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 552     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 553
 554     /* we actually set the size of a frame here and no-where else */
 555     gtk_widget_set_usize( m_widget, m_width, m_height );
 556
 557     m_sizeSet = TRUE;
 558
 559     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 560     event.SetEventObject( this );
 561     GetEventHandler()->ProcessEvent( event );
 562 }
 563
 564 void wxDialog::OnInternalIdle()
 565 {
 566     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 567         GtkOnSize( m_x, m_y, m_width, m_height );
 568
 569     wxWindow::OnInternalIdle();
 570 }
 571
 572 bool wxDialog::Show( bool show )
 573 {
 574     if (!show && IsModal())
 575     {
 576         EndModal( wxID_CANCEL );
 577     }
 578
 579     if (show && !m_sizeSet)
 580     {
 581         /* by calling GtkOnSize here, we don't have to call
 582            either after showing the frame, which would entail
 583            much ugly flicker nor from within the size_allocate
 584            handler, because GTK 1.1.X forbids that. */
 585
 586         GtkOnSize( m_x, m_y, m_width, m_height );
 587     }
 588
 589     bool ret = wxWindow::Show( show );
 590
 591     if (show) InitDialog();
 592
 593     return ret;
 594 }
 595
 596 bool wxDialog::IsModal() const
 597 {
 598     return m_modalShowing;
 599 }
 600
 601 void wxDialog::SetModal( bool WXUNUSED(flag) )
 602 {
 603 /*
 604   if (flag)
 605     m_windowStyle |= wxDIALOG_MODAL;
 606   else
 607     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 608 */
 609     wxFAIL_MSG( wxT("wxDialog:SetModal obsolete now") );
 610 }
 611
 612 int wxDialog::ShowModal()
 613 {
 614     if (IsModal())
 615     {
 616        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 617        return GetReturnCode();
 618     }
 619
 620     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 621
 622     Show( TRUE );
 623
 624     m_modalShowing = TRUE;
 625
 626     gtk_grab_add( m_widget );
 627     gtk_main();
 628     gtk_grab_remove( m_widget );
 629
 630     return GetReturnCode();
 631 }
 632
 633 void wxDialog::EndModal( int retCode )
 634 {
 635     SetReturnCode( retCode );
 636
 637     if (!IsModal())
 638     {
 639         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 640         return;
 641     }
 642
 643     m_modalShowing = FALSE;
 644
 645     gtk_main_quit();
 646
 647     Show( FALSE );
 648 }
 649
 650 void wxDialog::InitDialog()
 651 {
 652     wxWindow::InitDialog();
 653 }
 654
 655 void wxDialog::SetIcon( const wxIcon &icon )
 656 {
 657     m_icon = icon;
 658     if (!icon.Ok()) return;
 659
 660     if (!m_widget->window) return;
 661
 662     wxMask *mask = icon.GetMask();
 663     GdkBitmap *bm = (GdkBitmap *) NULL;
 664     if (mask) bm = mask->GetBitmap();
 665
 666     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 667 }