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