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