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
  22 //-----------------------------------------------------------------------------
  23 // idle system
  24 //-----------------------------------------------------------------------------
  25
  26 extern void wxapp_install_idle_handler();
  27 extern bool g_isIdle;
  28
  29 //-----------------------------------------------------------------------------
  30 // data
  31 //-----------------------------------------------------------------------------
  32
  33 extern wxList wxPendingDelete;
  34
  35 //-----------------------------------------------------------------------------
  36 // "delete_event"
  37 //-----------------------------------------------------------------------------
  38
  39 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxDialog *win )
  40 {
  41     if (g_isIdle) wxapp_install_idle_handler();
  42
  43 /*
  44     printf( "OnDelete from " );
  45     if (win->GetClassInfo() && win->GetClassInfo()->GetClassName())
  46         printf( win->GetClassInfo()->GetClassName() );
  47     printf( ".\n" );
  48 */
  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) wxapp_install_idle_handler();
  62
  63     if (!win->HasVMT()) return;
  64
  65 /*
  66     printf( "OnDialogResize from " );
  67     if (win->GetClassInfo() && win->GetClassInfo()->GetClassName())
  68         printf( win->GetClassInfo()->GetClassName() );
  69     printf( ".\n" );
  70 */
  71
  72    if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
  73    {
  74        win->m_sizeSet = FALSE;
  75        win->m_width = alloc->width;
  76        win->m_height = alloc->height;
  77    }
  78 }
  79
  80 //-----------------------------------------------------------------------------
  81 // "configure_event"
  82 //-----------------------------------------------------------------------------
  83
  84 static gint gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *event, wxDialog *win )
  85 {
  86     if (g_isIdle) wxapp_install_idle_handler();
  87
  88     if (!win->HasVMT()) return FALSE;
  89
  90     win->m_x = event->x;
  91     win->m_y = event->y;
  92
  93     wxMoveEvent mevent( wxPoint(win->m_x,win->m_y), win->GetId() );
  94     mevent.SetEventObject( win );
  95     win->GetEventHandler()->ProcessEvent( mevent );
  96
  97     return FALSE;
  98 }
  99
 100 //-----------------------------------------------------------------------------
 101 // "realize" from m_widget
 102 //-----------------------------------------------------------------------------
 103
 104 /* we cannot MWM hints and icons before the widget has been realized,
 105    so we do this directly after realization */
 106
 107 static gint
 108 gtk_dialog_realized_callback( GtkWidget *widget, wxDialog *win )
 109 {
 110     if (g_isIdle) wxapp_install_idle_handler();
 111
 112     /* all this is for Motif Window Manager "hints" and is supposed to be
 113        recognized by other WM as well. not tested. */
 114     long decor = (long) GDK_DECOR_ALL;
 115     long func = (long) GDK_FUNC_ALL;
 116
 117     if ((win->m_windowStyle & wxCAPTION) == 0)
 118         decor |= GDK_DECOR_TITLE;
 119 /*  if ((win->m_windowStyle & wxMINIMIZE) == 0)
 120         func |= GDK_FUNC_MINIMIZE;
 121     if ((win->m_windowStyle & wxMAXIMIZE) == 0)
 122         func |= GDK_FUNC_MAXIMIZE;            */
 123     if ((win->m_windowStyle & wxSYSTEM_MENU) == 0)
 124         decor |= GDK_DECOR_MENU;
 125     if ((win->m_windowStyle & wxMINIMIZE_BOX) == 0)
 126         decor |= GDK_DECOR_MINIMIZE;
 127     if ((win->m_windowStyle & wxMAXIMIZE_BOX) == 0)
 128         decor |= GDK_DECOR_MAXIMIZE;
 129     if ((win->m_windowStyle & wxRESIZE_BORDER) == 0)
 130         func |= GDK_FUNC_RESIZE;
 131
 132     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 133     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 134
 135     /* GTK's shrinking/growing policy */
 136     if ((win->m_windowStyle & wxRESIZE_BORDER) == 0)
 137         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 138     else
 139         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 140
 141     /* reset the icon */
 142     if (win->m_icon != wxNullIcon)
 143     {
 144         wxIcon icon( win->m_icon );
 145         win->m_icon = wxNullIcon;
 146         win->SetIcon( icon );
 147     }
 148
 149     return FALSE;
 150 }
 151
 152 //-----------------------------------------------------------------------------
 153 // "map" from m_widget
 154 //-----------------------------------------------------------------------------
 155
 156 static gint
 157 gtk_dialog_map_callback( GtkWidget *widget, wxDialog *win )
 158 {
 159     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 160
 161     return FALSE;
 162 }
 163
 164 //-----------------------------------------------------------------------------
 165 // wxDialog
 166 //-----------------------------------------------------------------------------
 167
 168 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 169     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 170     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 171     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 172     EVT_SIZE    (wxDialog::OnSize)
 173     EVT_CLOSE   (wxDialog::OnCloseWindow)
 174 END_EVENT_TABLE()
 175
 176 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 177
 178 void wxDialog::Init()
 179 {
 180     m_sizeSet = FALSE;
 181     m_modalShowing = FALSE;
 182 }
 183
 184 wxDialog::wxDialog( wxWindow *parent,
 185                     wxWindowID id, const wxString &title,
 186                     const wxPoint &pos, const wxSize &size,
 187                     long style, const wxString &name )
 188 {
 189     Init();
 190
 191     Create( parent, id, title, pos, size, style, name );
 192 }
 193
 194 bool wxDialog::Create( wxWindow *parent,
 195                        wxWindowID id, const wxString &title,
 196                        const wxPoint &pos, const wxSize &size,
 197                        long style, const wxString &name )
 198 {
 199     wxTopLevelWindows.Append( this );
 200
 201     m_needParent = FALSE;
 202
 203     PreCreation( parent, id, pos, size, style, name );
 204
 205     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 206     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 207
 208     gtk_widget_set( m_widget, "GtkWindow::allow_shrink", TRUE, NULL);
 209
 210     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 211         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 212
 213     m_wxwindow = gtk_myfixed_new();
 214     gtk_widget_show( m_wxwindow );
 215     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 216
 217     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 218
 219     SetTitle( title );
 220
 221     if (m_parent) m_parent->AddChild( this );
 222
 223     PostCreation();
 224
 225     /*  we cannot set MWM hints  before the widget has
 226         been realized, so we do this directly after realization */
 227     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 228                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 229
 230     /* we set the position of the window after the map event. setting it
 231        before has no effect (with KWM) */
 232     gtk_signal_connect( GTK_OBJECT(m_widget), "map",
 233                         GTK_SIGNAL_FUNC(gtk_dialog_map_callback), (gpointer) this );
 234
 235     /* the user resized the frame by dragging etc. */
 236     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 237         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 238
 239     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 240         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 241
 242     return TRUE;
 243 }
 244
 245 wxDialog::~wxDialog()
 246 {
 247     wxTopLevelWindows.DeleteObject( this );
 248
 249     if (wxTheApp->GetTopWindow() == this)
 250     {
 251         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 252     }
 253
 254     if (wxTopLevelWindows.Number() == 0)
 255     {
 256         wxTheApp->ExitMainLoop();
 257     }
 258 }
 259
 260 void wxDialog::SetTitle( const wxString& title )
 261 {
 262     m_title = title;
 263     if (m_title.IsNull()) m_title = _T("");
 264     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 265 }
 266
 267 wxString wxDialog::GetTitle() const
 268 {
 269     return (wxString&)m_title;
 270 }
 271
 272 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 273 {
 274     if (Validate()) TransferDataFromWindow();
 275 }
 276
 277 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 278 {
 279     if (IsModal())
 280     {
 281         EndModal(wxID_CANCEL);
 282     }
 283     else
 284     {
 285         SetReturnCode(wxID_CANCEL);
 286         this->Show(FALSE);
 287     }
 288 }
 289
 290 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 291 {
 292     if ( Validate() && TransferDataFromWindow())
 293     {
 294         if (IsModal())
 295         {
 296             EndModal(wxID_OK);
 297         }
 298         else
 299         {
 300             SetReturnCode(wxID_OK);
 301             this->Show(FALSE);
 302         }
 303     }
 304 }
 305
 306 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 307 {
 308     // yes
 309 }
 310
 311 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 312 {
 313     // We'll send a Cancel message by default,
 314     // which may close the dialog.
 315     // Check for looping if the Cancel event handler calls Close().
 316
 317     // Note that if a cancel button and handler aren't present in the dialog,
 318     // nothing will happen when you close the dialog via the window manager, or
 319     // via Close().
 320     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 321     // created on the stack.
 322     // However, this does mean that calling dialog->Close() won't delete the dialog
 323     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 324     // sure to destroy the dialog.
 325     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 326
 327     static wxList s_closing;
 328
 329     if (s_closing.Member(this))
 330         return;   // no loops
 331
 332     s_closing.Append(this);
 333
 334     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 335     cancelEvent.SetEventObject( this );
 336     GetEventHandler()->ProcessEvent(cancelEvent);
 337     s_closing.DeleteObject(this);
 338 }
 339
 340 bool wxDialog::Destroy()
 341 {
 342     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 343
 344     return TRUE;
 345 }
 346
 347 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 348 {
 349     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 350
 351     if (GetAutoLayout())
 352     {
 353         Layout();
 354     }
 355     else
 356     {
 357         /* no child: go out ! */
 358         if (!GetChildren().First()) return;
 359
 360         /* do we have exactly one child? */
 361         wxWindow *child = (wxWindow *) NULL;
 362         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 363         {
 364             wxWindow *win = (wxWindow *)node->Data();
 365             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 366             {
 367                 /* it's the second one: do nothing */
 368                 if (child) return;
 369                 child = win;
 370             }
 371         }
 372
 373         /* yes: set it's size to fill all the frame */
 374         int client_x, client_y;
 375         GetClientSize( &client_x, &client_y );
 376         child->SetSize( 1, 1, client_x-2, client_y);
 377     }
 378 }
 379
 380 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 381 {
 382     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 383     wxASSERT_MSG( (m_wxwindow != NULL), _T("invalid dialog") );
 384
 385     if (m_resizing) return; /* I don't like recursions */
 386     m_resizing = TRUE;
 387
 388     int old_x = m_x;
 389     int old_y = m_y;
 390     int old_width = m_width;
 391     int old_height = m_height;
 392
 393     if ((sizeFlags & wxSIZE_USE_EXISTING) == wxSIZE_USE_EXISTING)
 394     {
 395         if (x != -1) m_x = x;
 396         if (y != -1) m_y = y;
 397         if (width != -1) m_width = width;
 398         if (height != -1) m_height = height;
 399     }
 400     else
 401     {
 402         m_x = x;
 403         m_y = y;
 404         m_width = width;
 405         m_height = height;
 406     }
 407
 408     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 409     {
 410         if (width == -1) m_width = 80;
 411     }
 412
 413     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 414     {
 415        if (height == -1) m_height = 26;
 416     }
 417
 418     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 419     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 420     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 421     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 422
 423     if ((m_x != -1) || (m_y != -1))
 424     {
 425         if ((m_x != old_x) || (m_y != old_y))
 426         {
 427             /* we set the position here and when showing the dialog
 428                for the first time in idle time */
 429             gtk_widget_set_uposition( m_widget, m_x, m_y );
 430         }
 431     }
 432
 433     if ((m_width != old_width) || (m_height != old_height))
 434     {
 435         /* actual resizing is deferred to GtkOnSize in idle time and
 436            when showing the dialog */
 437         m_sizeSet = FALSE;
 438     }
 439
 440     m_resizing = FALSE;
 441 }
 442
 443 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 444 {
 445     // due to a bug in gtk, x,y are always 0
 446     // m_x = x;
 447     // m_y = y;
 448
 449     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 450     if (!m_wxwindow) return;
 451
 452     m_width = width;
 453     m_height = height;
 454
 455     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 456     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 457     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 458     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 459
 460     /* we actually set the size of a frame here and no-where else */
 461     gtk_widget_set_usize( m_widget, m_width, m_height );
 462
 463     m_sizeSet = TRUE;
 464
 465     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 466     event.SetEventObject( this );
 467     GetEventHandler()->ProcessEvent( event );
 468 }
 469
 470 void wxDialog::Centre( int direction )
 471 {
 472     wxASSERT_MSG( (m_widget != NULL), _T("invalid dialog") );
 473
 474     int x = 0;
 475     int y = 0;
 476
 477     if ((direction & wxHORIZONTAL) == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 478     if ((direction & wxVERTICAL) == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 479
 480     Move( x, y );
 481 }
 482
 483 void wxDialog::OnInternalIdle()
 484 {
 485     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 486         GtkOnSize( m_x, m_y, m_width, m_height );
 487 }
 488
 489 bool wxDialog::Show( bool show )
 490 {
 491     if (!show && IsModal())
 492     {
 493         EndModal( wxID_CANCEL );
 494     }
 495
 496     if (show && !m_sizeSet)
 497     {
 498         /* by calling GtkOnSize here, we don't have to call
 499            either after showing the frame, which would entail
 500            much ugly flicker nor from within the size_allocate
 501            handler, because GTK 1.1.X forbids that. */
 502
 503         GtkOnSize( m_x, m_y, m_width, m_height );
 504     }
 505
 506     if (show != m_isShown)
 507     {
 508         if (show)
 509         {
 510             gtk_widget_show( m_widget );
 511         }
 512         else
 513             gtk_widget_hide( m_widget );
 514
 515         m_isShown = show;
 516     }
 517
 518     if (show) InitDialog();
 519
 520     return TRUE;
 521 }
 522
 523 bool wxDialog::IsModal() const
 524 {
 525     return m_modalShowing;
 526 }
 527
 528 void wxDialog::SetModal( bool WXUNUSED(flag) )
 529 {
 530 /*
 531   if (flag)
 532     m_windowStyle |= wxDIALOG_MODAL;
 533   else
 534     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 535 */
 536     wxFAIL_MSG( _T("wxDialog:SetModal obsolete now") );
 537 }
 538
 539 int wxDialog::ShowModal()
 540 {
 541     if (IsModal())
 542     {
 543        wxFAIL_MSG( _T("wxDialog:ShowModal called twice") );
 544        return GetReturnCode();
 545     }
 546
 547     Show( TRUE );
 548
 549     m_modalShowing = TRUE;
 550
 551     gtk_grab_add( m_widget );
 552     gtk_main();
 553     gtk_grab_remove( m_widget );
 554
 555     return GetReturnCode();
 556 }
 557
 558 void wxDialog::EndModal( int retCode )
 559 {
 560     SetReturnCode( retCode );
 561
 562     if (!IsModal())
 563     {
 564         wxFAIL_MSG( _T("wxDialog:EndModal called twice") );
 565         return;
 566     }
 567
 568     m_modalShowing = FALSE;
 569
 570     gtk_main_quit();
 571
 572     Show( FALSE );
 573 }
 574
 575 void wxDialog::InitDialog()
 576 {
 577     wxWindow::InitDialog();
 578 }
 579
 580 void wxDialog::SetIcon( const wxIcon &icon )
 581 {
 582     m_icon = icon;
 583     if (!icon.Ok()) return;
 584
 585     wxMask *mask = icon.GetMask();
 586     GdkBitmap *bm = (GdkBitmap *) NULL;
 587     if (mask) bm = mask->GetBitmap();
 588
 589     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 590 }