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