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
  35 //-----------------------------------------------------------------------------
  36 // data
  37 //-----------------------------------------------------------------------------
  38
  39 extern wxList wxPendingDelete;
  40
  41 //-----------------------------------------------------------------------------
  42 // "delete_event"
  43 //-----------------------------------------------------------------------------
  44
  45 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxDialog *win )
  46 {
  47     if (g_isIdle)
  48         wxapp_install_idle_handler();
  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)
  62         wxapp_install_idle_handler();
  63
  64     if (!win->m_hasVMT) return;
  65
  66     if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
  67     {
  68         win->m_width = alloc->width;
  69         win->m_height = alloc->height;
  70         win->UpdateSize();
  71     }
  72 }
  73
  74 //-----------------------------------------------------------------------------
  75 // "configure_event"
  76 //-----------------------------------------------------------------------------
  77
  78 static gint
  79 #if (GTK_MINOR_VERSON > 0)
  80 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDialog *win )
  81 #else
  82 gtk_dialog_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *event, wxDialog *win )
  83 #endif
  84 {
  85     if (g_isIdle)
  86         wxapp_install_idle_handler();
  87
  88     if (!win->m_hasVMT) return FALSE;
  89
  90 #if (GTK_MINOR_VERSON > 0)
  91     int x = 0;
  92     int y = 0;
  93     gdk_window_get_root_origin( win->m_widget->window, &x, &y );
  94     win->m_x = x;
  95     win->m_y = y;
  96 #else
  97     win->m_x = event->x;
  98     win->m_y = event->y;
  99 #endif
 100
 101     wxMoveEvent mevent( wxPoint(win->m_x,win->m_y), win->GetId() );
 102     mevent.SetEventObject( win );
 103     win->GetEventHandler()->ProcessEvent( mevent );
 104
 105     return FALSE;
 106 }
 107
 108 //-----------------------------------------------------------------------------
 109 // "realize" from m_widget
 110 //-----------------------------------------------------------------------------
 111
 112 /* we cannot MWM hints and icons before the widget has been realized,
 113    so we do this directly after realization */
 114
 115 static gint
 116 gtk_dialog_realized_callback( GtkWidget *widget, wxDialog *win )
 117 {
 118     if (g_isIdle)
 119         wxapp_install_idle_handler();
 120
 121     /* I haven''t been able to set the position of
 122        the dialog before it is shown, so I set the
 123        position in "realize" and "map" */
 124     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 125
 126     /* set size hints */
 127     gint flag = GDK_HINT_POS;
 128     if ((win->GetMinWidth() != -1) || (win->GetMinHeight() != -1)) flag |= GDK_HINT_MIN_SIZE;
 129     if ((win->GetMaxWidth() != -1) || (win->GetMaxHeight() != -1)) flag |= GDK_HINT_MAX_SIZE;
 130     if (flag)
 131     {
 132         gdk_window_set_hints( win->m_widget->window,
 133                               win->m_x, win->m_y,
 134                               win->GetMinWidth(), win->GetMinHeight(),
 135                               win->GetMaxWidth(), win->GetMaxHeight(),
 136                               flag );
 137     }
 138
 139     /* reset the icon */
 140     if (win->m_icon != wxNullIcon)
 141     {
 142         wxIcon icon( win->m_icon );
 143         win->m_icon = wxNullIcon;
 144         win->SetIcon( icon );
 145     }
 146
 147     return FALSE;
 148 }
 149
 150 //-----------------------------------------------------------------------------
 151 // "map" from m_widget
 152 //-----------------------------------------------------------------------------
 153
 154 static gint
 155 gtk_dialog_map_callback( GtkWidget *widget, wxDialog *win )
 156 {
 157     if (g_isIdle)
 158         wxapp_install_idle_handler();
 159
 160     /* I haven''t been able to set the position of
 161        the dialog before it is shown, so I set the
 162        position in "realize" and "map" */
 163     gtk_widget_set_uposition( widget, win->m_x, win->m_y );
 164
 165     /* all this is for Motif Window Manager "hints" and is supposed to be
 166        recognized by other WM as well. not tested. */
 167     long decor = (long) GDK_DECOR_BORDER;
 168     long func = (long) GDK_FUNC_MOVE ;
 169
 170     if ((win->GetWindowStyle() & wxCAPTION) != 0)
 171         decor |= GDK_DECOR_TITLE;
 172     if ((win->GetWindowStyle() & wxSYSTEM_MENU) != 0)
 173     {
 174        decor |= GDK_DECOR_MENU;
 175        func |= GDK_FUNC_CLOSE;
 176     }
 177     if ((win->GetWindowStyle() & wxMINIMIZE_BOX) != 0)
 178     {
 179         func |= GDK_FUNC_MINIMIZE;
 180         decor |= GDK_DECOR_MINIMIZE;
 181     }
 182     if ((win->GetWindowStyle() & wxMAXIMIZE_BOX) != 0)
 183     {
 184         decor |= GDK_DECOR_MAXIMIZE;
 185         func |= GDK_FUNC_MAXIMIZE;
 186     }
 187     if ((win->GetWindowStyle() & wxRESIZE_BORDER) != 0)
 188     {
 189        func |= GDK_FUNC_RESIZE;
 190        decor |= GDK_DECOR_RESIZEH;
 191     }
 192     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 193     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 194
 195     /* GTK's shrinking/growing policy */
 196     if ((win->GetWindowStyle() & wxRESIZE_BORDER) == 0)
 197         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 198     else
 199         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 200
 201     return FALSE;
 202 }
 203
 204 //-----------------------------------------------------------------------------
 205 // InsertChild for wxDialog
 206 //-----------------------------------------------------------------------------
 207
 208 /* Callback for wxFrame. This very strange beast has to be used because
 209  * C++ has no virtual methods in a constructor. We have to emulate a
 210  * virtual function here as wxWindows requires different ways to insert
 211  * a child in container classes. */
 212
 213 static void wxInsertChildInDialog( wxDialog* parent, wxWindow* child )
 214 {
 215     gtk_myfixed_put( GTK_MYFIXED(parent->m_wxwindow),
 216                      GTK_WIDGET(child->m_widget),
 217                      child->m_x,
 218                      child->m_y,
 219                      child->m_width,
 220                      child->m_height );
 221
 222     if (parent->HasFlag(wxTAB_TRAVERSAL))
 223     {
 224         /* we now allow a window to get the focus as long as it
 225            doesn't have any children. */
 226         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 227     }
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // wxDialog
 232 //-----------------------------------------------------------------------------
 233
 234 BEGIN_EVENT_TABLE(wxDialog,wxPanel)
 235     EVT_BUTTON  (wxID_OK,       wxDialog::OnOK)
 236     EVT_BUTTON  (wxID_CANCEL,   wxDialog::OnCancel)
 237     EVT_BUTTON  (wxID_APPLY,    wxDialog::OnApply)
 238     EVT_SIZE    (wxDialog::OnSize)
 239     EVT_CLOSE   (wxDialog::OnCloseWindow)
 240 END_EVENT_TABLE()
 241
 242 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxPanel)
 243
 244 void wxDialog::Init()
 245 {
 246     m_returnCode = 0;
 247     m_sizeSet = FALSE;
 248     m_modalShowing = FALSE;
 249 }
 250
 251 wxDialog::wxDialog( wxWindow *parent,
 252                     wxWindowID id, const wxString &title,
 253                     const wxPoint &pos, const wxSize &size,
 254                     long style, const wxString &name )
 255 {
 256     Init();
 257
 258     Create( parent, id, title, pos, size, style, name );
 259 }
 260
 261 bool wxDialog::Create( wxWindow *parent,
 262                        wxWindowID id, const wxString &title,
 263                        const wxPoint &pos, const wxSize &size,
 264                        long style, const wxString &name )
 265 {
 266     wxTopLevelWindows.Append( this );
 267
 268     m_needParent = FALSE;
 269
 270     if (!PreCreation( parent, pos, size ) ||
 271         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 272     {
 273         wxFAIL_MSG( wxT("wxDialog creation failed") );
 274         return FALSE;
 275     }
 276
 277     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 278
 279     m_widget = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 280
 281     if (!name.IsEmpty())
 282         gtk_window_set_wmclass( GTK_WINDOW(m_widget), name.mb_str(), name.mb_str() );
 283
 284     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 285
 286     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 287         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 288
 289     m_wxwindow = gtk_myfixed_new();
 290     gtk_widget_show( m_wxwindow );
 291     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 292
 293     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 294
 295     SetTitle( title );
 296
 297     if (m_parent) m_parent->AddChild( this );
 298
 299     PostCreation();
 300
 301     /*  we cannot set MWM hints  before the widget has
 302         been realized, so we do this directly after realization */
 303     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 304                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 305
 306     /* we set the position of the window after the map event. setting it
 307        before has no effect (with KWM) */
 308     gtk_signal_connect( GTK_OBJECT(m_widget), "map",
 309                         GTK_SIGNAL_FUNC(gtk_dialog_map_callback), (gpointer) this );
 310
 311     /* the user resized the frame by dragging etc. */
 312     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 313         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 314
 315     gtk_signal_connect( GTK_OBJECT(m_widget), "configure_event",
 316         GTK_SIGNAL_FUNC(gtk_dialog_configure_callback), (gpointer)this );
 317
 318     return TRUE;
 319 }
 320
 321 wxDialog::~wxDialog()
 322 {
 323     m_isBeingDeleted = TRUE;
 324
 325     wxTopLevelWindows.DeleteObject( this );
 326
 327     if (wxTheApp->GetTopWindow() == this)
 328     {
 329         wxTheApp->SetTopWindow( (wxWindow*) NULL );
 330     }
 331
 332     if (wxTopLevelWindows.Number() == 0)
 333     {
 334         wxTheApp->ExitMainLoop();
 335     }
 336 }
 337
 338 void wxDialog::SetTitle( const wxString& title )
 339 {
 340     m_title = title;
 341     if (m_title.IsNull()) m_title = wxT("");
 342     gtk_window_set_title( GTK_WINDOW(m_widget), m_title.mbc_str() );
 343 }
 344
 345 wxString wxDialog::GetTitle() const
 346 {
 347     return (wxString&)m_title;
 348 }
 349
 350 void wxDialog::OnApply( wxCommandEvent &WXUNUSED(event) )
 351 {
 352     if (Validate()) TransferDataFromWindow();
 353 }
 354
 355 void wxDialog::OnCancel( wxCommandEvent &WXUNUSED(event) )
 356 {
 357     if (IsModal())
 358     {
 359         EndModal(wxID_CANCEL);
 360     }
 361     else
 362     {
 363         SetReturnCode(wxID_CANCEL);
 364         Show(FALSE);
 365     }
 366 }
 367
 368 void wxDialog::OnOK( wxCommandEvent &WXUNUSED(event) )
 369 {
 370     if (Validate() && TransferDataFromWindow())
 371     {
 372         if (IsModal())
 373         {
 374             EndModal(wxID_OK);
 375         }
 376         else
 377         {
 378             SetReturnCode(wxID_OK);
 379             this->Show(FALSE);
 380         }
 381     }
 382 }
 383
 384 void wxDialog::OnPaint( wxPaintEvent& WXUNUSED(event) )
 385 {
 386     // yes
 387 }
 388
 389 void wxDialog::OnCloseWindow(wxCloseEvent& event)
 390 {
 391     // We'll send a Cancel message by default,
 392     // which may close the dialog.
 393     // Check for looping if the Cancel event handler calls Close().
 394
 395     // Note that if a cancel button and handler aren't present in the dialog,
 396     // nothing will happen when you close the dialog via the window manager, or
 397     // via Close().
 398     // We wouldn't want to destroy the dialog by default, since the dialog may have been
 399     // created on the stack.
 400     // However, this does mean that calling dialog->Close() won't delete the dialog
 401     // unless the handler for wxID_CANCEL does so. So use Destroy() if you want to be
 402     // sure to destroy the dialog.
 403     // The default OnCancel (above) simply ends a modal dialog, and hides a modeless dialog.
 404
 405     static wxList s_closing;
 406
 407     if (s_closing.Member(this))
 408         return;   // no loops
 409
 410     s_closing.Append(this);
 411
 412     wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 413     cancelEvent.SetEventObject( this );
 414     GetEventHandler()->ProcessEvent(cancelEvent);
 415     s_closing.DeleteObject(this);
 416 }
 417
 418 bool wxDialog::Destroy()
 419 {
 420     if (!wxPendingDelete.Member(this)) wxPendingDelete.Append(this);
 421
 422     return TRUE;
 423 }
 424
 425 void wxDialog::OnSize( wxSizeEvent &WXUNUSED(event) )
 426 {
 427     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 428
 429 #if wxUSE_CONSTRAINTS
 430     if (GetAutoLayout())
 431     {
 432         Layout();
 433     }
 434     else
 435 #endif // wxUSE_CONSTRAINTS
 436     {
 437         /* no child: go out ! */
 438         if (!GetChildren().First()) return;
 439
 440         /* do we have exactly one child? */
 441         wxWindow *child = (wxWindow *) NULL;
 442         for(wxNode *node = GetChildren().First(); node; node = node->Next())
 443         {
 444             wxWindow *win = (wxWindow *)node->Data();
 445             if (!wxIS_KIND_OF(win,wxFrame) && !wxIS_KIND_OF(win,wxDialog))
 446             {
 447                 /* it's the second one: do nothing */
 448                 if (child) return;
 449                 child = win;
 450             }
 451         }
 452
 453         /* yes: set it's size to fill all the frame */
 454         int client_x, client_y;
 455         GetClientSize( &client_x, &client_y );
 456         child->SetSize( 1, 1, client_x-2, client_y);
 457     }
 458 }
 459
 460 void wxDialog::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 461 {
 462     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 463     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid dialog") );
 464
 465     if (m_resizing) return; /* I don't like recursions */
 466     m_resizing = TRUE;
 467
 468     int old_x = m_x;
 469     int old_y = m_y;
 470     int old_width = m_width;
 471     int old_height = m_height;
 472
 473     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 474     {
 475         if (x != -1) m_x = x;
 476         if (y != -1) m_y = y;
 477         if (width != -1) m_width = width;
 478         if (height != -1) m_height = height;
 479     }
 480     else
 481     {
 482         m_x = x;
 483         m_y = y;
 484         m_width = width;
 485         m_height = height;
 486     }
 487
 488     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 489     {
 490         if (width == -1) m_width = 80;
 491     }
 492
 493     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 494     {
 495        if (height == -1) m_height = 26;
 496     }
 497
 498     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 499     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 500     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 501     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 502
 503     if ((m_x != -1) || (m_y != -1))
 504     {
 505         if ((m_x != old_x) || (m_y != old_y))
 506         {
 507             /* we set the position here and when showing the dialog
 508                for the first time in idle time */
 509             gtk_widget_set_uposition( m_widget, m_x, m_y );
 510         }
 511     }
 512
 513     if ((m_width != old_width) || (m_height != old_height))
 514     {
 515         /* actual resizing is deferred to GtkOnSize in idle time and
 516            when showing the dialog */
 517         m_sizeSet = FALSE;
 518     }
 519
 520     m_resizing = FALSE;
 521 }
 522
 523 void wxDialog::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 524 {
 525     // due to a bug in gtk, x,y are always 0
 526     // m_x = x;
 527     // m_y = y;
 528
 529     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 530     if (!m_wxwindow) return;
 531
 532     m_width = width;
 533     m_height = height;
 534
 535     if ((m_minWidth != -1) && (m_width < m_minWidth)) m_width = m_minWidth;
 536     if ((m_minHeight != -1) && (m_height < m_minHeight)) m_height = m_minHeight;
 537     if ((m_maxWidth != -1) && (m_width > m_maxWidth)) m_width = m_maxWidth;
 538     if ((m_maxHeight != -1) && (m_height > m_maxHeight)) m_height = m_maxHeight;
 539
 540     /* we actually set the size of a frame here and no-where else */
 541     gtk_widget_set_usize( m_widget, m_width, m_height );
 542
 543     m_sizeSet = TRUE;
 544
 545     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 546     event.SetEventObject( this );
 547     GetEventHandler()->ProcessEvent( event );
 548 }
 549
 550 void wxDialog::Centre( int direction )
 551 {
 552     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 553
 554     int x = 0;
 555     int y = 0;
 556
 557     if ((direction & wxHORIZONTAL) == wxHORIZONTAL) x = (gdk_screen_width () - m_width) / 2;
 558     if ((direction & wxVERTICAL) == wxVERTICAL) y = (gdk_screen_height () - m_height) / 2;
 559
 560     Move( x, y );
 561 }
 562
 563 void wxDialog::OnInternalIdle()
 564 {
 565     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 566         GtkOnSize( m_x, m_y, m_width, m_height );
 567
 568     wxWindow::OnInternalIdle();
 569 }
 570
 571 bool wxDialog::Show( bool show )
 572 {
 573     if (!show && IsModal())
 574     {
 575         EndModal( wxID_CANCEL );
 576     }
 577
 578     if (show && !m_sizeSet)
 579     {
 580         /* by calling GtkOnSize here, we don't have to call
 581            either after showing the frame, which would entail
 582            much ugly flicker nor from within the size_allocate
 583            handler, because GTK 1.1.X forbids that. */
 584
 585         GtkOnSize( m_x, m_y, m_width, m_height );
 586     }
 587
 588     bool ret = wxWindow::Show( show );
 589
 590     if (show) InitDialog();
 591
 592     return ret;
 593 }
 594
 595 bool wxDialog::IsModal() const
 596 {
 597     return m_modalShowing;
 598 }
 599
 600 void wxDialog::SetModal( bool WXUNUSED(flag) )
 601 {
 602 /*
 603   if (flag)
 604     m_windowStyle |= wxDIALOG_MODAL;
 605   else
 606     if (m_windowStyle & wxDIALOG_MODAL) m_windowStyle -= wxDIALOG_MODAL;
 607 */
 608     wxFAIL_MSG( wxT("wxDialog:SetModal obsolete now") );
 609 }
 610
 611 int wxDialog::ShowModal()
 612 {
 613     if (IsModal())
 614     {
 615        wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );
 616        return GetReturnCode();
 617     }
 618
 619     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 620
 621     Show( TRUE );
 622
 623     m_modalShowing = TRUE;
 624
 625     gtk_grab_add( m_widget );
 626     gtk_main();
 627     gtk_grab_remove( m_widget );
 628
 629     return GetReturnCode();
 630 }
 631
 632 void wxDialog::EndModal( int retCode )
 633 {
 634     SetReturnCode( retCode );
 635
 636     if (!IsModal())
 637     {
 638         wxFAIL_MSG( wxT("wxDialog:EndModal called twice") );
 639         return;
 640     }
 641
 642     m_modalShowing = FALSE;
 643
 644     gtk_main_quit();
 645
 646     Show( FALSE );
 647 }
 648
 649 void wxDialog::InitDialog()
 650 {
 651     wxWindow::InitDialog();
 652 }
 653
 654 void wxDialog::SetIcon( const wxIcon &icon )
 655 {
 656     m_icon = icon;
 657     if (!icon.Ok()) return;
 658
 659     if (!m_widget->window) return;
 660
 661     wxMask *mask = icon.GetMask();
 662     GdkBitmap *bm = (GdkBitmap *) NULL;
 663     if (mask) bm = mask->GetBitmap();
 664
 665     gdk_window_set_icon( m_widget->window, (GdkWindow *) NULL, icon.GetPixmap(), bm );
 666 }