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