src/gtk/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/mdi.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_MDI
  14
  15 #include "wx/mdi.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/intl.h"
  19     #include "wx/menu.h"
  20 #endif
  21
  22 #include "wx/gtk/private.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // "switch_page"
  26 //-----------------------------------------------------------------------------
  27
  28 extern "C" {
  29 static void
  30 switch_page(GtkNotebook* widget, GtkNotebookPage*, guint page_num, wxMDIParentFrame* parent)
  31 {
  32     // send deactivate event to old child
  33
  34     wxMDIChildFrame *child = parent->GetActiveChild();
  35     if (child)
  36     {
  37         wxActivateEvent event1( wxEVT_ACTIVATE, false, child->GetId() );
  38         event1.SetEventObject( child);
  39         child->HandleWindowEvent( event1 );
  40     }
  41
  42     // send activate event to new child
  43
  44     wxMDIClientWindowBase *client_window = parent->GetClientWindow();
  45     if ( !client_window )
  46         return;
  47
  48     child = NULL;
  49     GtkWidget* page = gtk_notebook_get_nth_page(widget, page_num);
  50
  51     wxWindowList::compatibility_iterator node = client_window->GetChildren().GetFirst();
  52     while ( node )
  53     {
  54         wxMDIChildFrame *child_frame = wxDynamicCast( node->GetData(), wxMDIChildFrame );
  55
  56         // child_frame can be NULL when this is called from dtor, probably
  57         // because g_signal_connect (m_widget, "switch_page", (see below)
  58         // isn't deleted early enough
  59         if (child_frame && child_frame->m_widget == page)
  60         {
  61             child = child_frame;
  62             break;
  63         }
  64         node = node->GetNext();
  65     }
  66
  67     if (!child)
  68          return;
  69
  70     wxActivateEvent event2( wxEVT_ACTIVATE, true, child->GetId() );
  71     event2.SetEventObject( child);
  72     child->HandleWindowEvent( event2 );
  73 }
  74 }
  75
  76 //-----------------------------------------------------------------------------
  77 // wxMDIParentFrame
  78 //-----------------------------------------------------------------------------
  79
  80 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame,wxFrame)
  81
  82 void wxMDIParentFrame::Init()
  83 {
  84     m_justInserted = false;
  85 }
  86
  87 bool wxMDIParentFrame::Create(wxWindow *parent,
  88                               wxWindowID id,
  89                               const wxString& title,
  90                               const wxPoint& pos,
  91                               const wxSize& size,
  92                               long style,
  93                               const wxString& name )
  94 {
  95     if ( !wxFrame::Create( parent, id, title, pos, size, style, name ) )
  96         return false;
  97
  98     m_clientWindow = OnCreateClient();
  99     if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 100         return false;
 101
 102     return true;
 103 }
 104
 105 void wxMDIParentFrame::OnInternalIdle()
 106 {
 107     /* if a MDI child window has just been inserted
 108        it has to be brought to the top in idle time. we
 109        simply set the last notebook page active as new
 110        pages can only be appended at the end */
 111
 112     if (m_justInserted)
 113     {
 114         GtkNotebook *notebook = GTK_NOTEBOOK(m_clientWindow->m_widget);
 115         gtk_notebook_set_current_page(notebook, -1);
 116
 117         /* need to set the menubar of the child */
 118         wxMDIChildFrame *active_child_frame = GetActiveChild();
 119         if (active_child_frame != NULL)
 120         {
 121             wxMenuBar *menu_bar = active_child_frame->m_menuBar;
 122             if (menu_bar)
 123             {
 124                 menu_bar->Attach(active_child_frame);
 125             }
 126         }
 127         m_justInserted = false;
 128         return;
 129     }
 130
 131     wxFrame::OnInternalIdle();
 132
 133     wxMDIChildFrame *active_child_frame = GetActiveChild();
 134     bool visible_child_menu = false;
 135
 136     wxWindowList::compatibility_iterator node = m_clientWindow->GetChildren().GetFirst();
 137     while (node)
 138     {
 139         wxMDIChildFrame *child_frame = wxDynamicCast( node->GetData(), wxMDIChildFrame );
 140
 141         if ( child_frame )
 142         {
 143             wxMenuBar *menu_bar = child_frame->m_menuBar;
 144             if ( menu_bar )
 145             {
 146                 if (child_frame == active_child_frame)
 147                 {
 148                     if (menu_bar->Show(true))
 149                     {
 150                         // Attach() asserts if we call it for an already
 151                         // attached menu bar so don't do it if we're already
 152                         // associated with this frame (it would be nice to get
 153                         // rid of this check and ensure that this doesn't
 154                         // happen...)
 155                         if ( menu_bar->GetFrame() != child_frame )
 156                             menu_bar->Attach( child_frame );
 157                     }
 158                     visible_child_menu = true;
 159                 }
 160                 else
 161                 {
 162                     if (menu_bar->Show(false))
 163                     {
 164                         menu_bar->Detach();
 165                     }
 166                 }
 167             }
 168         }
 169
 170         node = node->GetNext();
 171     }
 172
 173     /* show/hide parent menu bar as required */
 174     if ((m_frameMenuBar) &&
 175         (m_frameMenuBar->IsShown() == visible_child_menu))
 176     {
 177         if (visible_child_menu)
 178         {
 179             m_frameMenuBar->Show( false );
 180             m_frameMenuBar->Detach();
 181         }
 182         else
 183         {
 184             m_frameMenuBar->Show( true );
 185             m_frameMenuBar->Attach( this );
 186         }
 187     }
 188 }
 189
 190 void wxMDIParentFrame::DoGetClientSize(int* width, int* height) const
 191 {
 192     wxFrame::DoGetClientSize(width, height);
 193
 194     if (height)
 195     {
 196         wxMDIChildFrame* active_child_frame = GetActiveChild();
 197         if (active_child_frame)
 198         {
 199             wxMenuBar* menubar = active_child_frame->m_menuBar;
 200             if (menubar && menubar->IsShown())
 201             {
 202                 GtkRequisition req;
 203                 gtk_widget_size_request(menubar->m_widget, &req);
 204                 *height -= req.height;
 205                 if (*height < 0) *height = 0;
 206             }
 207         }
 208     }
 209 }
 210
 211 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 212 {
 213     if (!m_clientWindow) return NULL;
 214
 215     GtkNotebook *notebook = GTK_NOTEBOOK(m_clientWindow->m_widget);
 216     if (!notebook) return NULL;
 217
 218     gint i = gtk_notebook_get_current_page( notebook );
 219     if (i < 0) return NULL;
 220
 221     GtkWidget* page = gtk_notebook_get_nth_page(notebook, i);
 222     if (!page) return NULL;
 223
 224     wxWindowList::compatibility_iterator node = m_clientWindow->GetChildren().GetFirst();
 225     while (node)
 226     {
 227         if ( wxPendingDelete.Member(node->GetData()) )
 228             return NULL;
 229
 230         wxMDIChildFrame *child_frame = wxDynamicCast( node->GetData(), wxMDIChildFrame );
 231
 232         if (!child_frame)
 233             return NULL;
 234
 235         if (child_frame->m_widget == page)
 236             return child_frame;
 237
 238         node = node->GetNext();
 239     }
 240
 241     return NULL;
 242 }
 243
 244 void wxMDIParentFrame::ActivateNext()
 245 {
 246     if (m_clientWindow)
 247       gtk_notebook_next_page( GTK_NOTEBOOK(m_clientWindow->m_widget) );
 248 }
 249
 250 void wxMDIParentFrame::ActivatePrevious()
 251 {
 252     if (m_clientWindow)
 253       gtk_notebook_prev_page( GTK_NOTEBOOK(m_clientWindow->m_widget) );
 254 }
 255
 256 //-----------------------------------------------------------------------------
 257 // wxMDIChildFrame
 258 //-----------------------------------------------------------------------------
 259
 260 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame,wxFrame)
 261
 262 BEGIN_EVENT_TABLE(wxMDIChildFrame, wxFrame)
 263     EVT_ACTIVATE(wxMDIChildFrame::OnActivate)
 264     EVT_MENU_HIGHLIGHT_ALL(wxMDIChildFrame::OnMenuHighlight)
 265 END_EVENT_TABLE()
 266
 267 void wxMDIChildFrame::Init()
 268 {
 269     m_menuBar = NULL;
 270 }
 271
 272 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 273                              wxWindowID id,
 274                              const wxString& title,
 275                              const wxPoint& WXUNUSED(pos),
 276                              const wxSize& size,
 277                              long style,
 278                              const wxString& name)
 279 {
 280     m_mdiParent = parent;
 281     m_title = title;
 282
 283     return wxWindow::Create(parent->GetClientWindow(), id,
 284                             wxDefaultPosition, size,
 285                             style, name);
 286 }
 287
 288 wxMDIChildFrame::~wxMDIChildFrame()
 289 {
 290     delete m_menuBar;
 291
 292     // wxMDIClientWindow does not get redrawn properly after last child is removed
 293     if (m_parent && m_parent->GetChildren().size() <= 1)
 294         gtk_widget_queue_draw(m_parent->m_widget);
 295 }
 296
 297 void wxMDIChildFrame::SetMenuBar( wxMenuBar *menu_bar )
 298 {
 299     wxASSERT_MSG( m_menuBar == NULL, "Only one menubar allowed" );
 300
 301     m_menuBar = menu_bar;
 302
 303     if (m_menuBar)
 304     {
 305         wxMDIParentFrame *mdi_frame = (wxMDIParentFrame*)m_parent->GetParent();
 306
 307         m_menuBar->SetParent( mdi_frame );
 308
 309         /* insert the invisible menu bar into the _parent_ mdi frame */
 310         m_menuBar->Show(false);
 311         gtk_box_pack_start(GTK_BOX(mdi_frame->m_mainWidget), m_menuBar->m_widget, false, false, 0);
 312         gtk_box_reorder_child(GTK_BOX(mdi_frame->m_mainWidget), m_menuBar->m_widget, 0);
 313
 314         gulong handler_id = g_signal_handler_find(
 315             m_menuBar->m_widget,
 316             GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
 317             g_signal_lookup("size_request", GTK_TYPE_WIDGET),
 318             0, NULL, NULL, m_menuBar);
 319         if (handler_id != 0)
 320             g_signal_handler_disconnect(m_menuBar->m_widget, handler_id);
 321         gtk_widget_set_size_request(m_menuBar->m_widget, -1, -1);
 322     }
 323 }
 324
 325 wxMenuBar *wxMDIChildFrame::GetMenuBar() const
 326 {
 327     return m_menuBar;
 328 }
 329
 330 GtkNotebook *wxMDIChildFrame::GTKGetNotebook() const
 331 {
 332     wxMDIClientWindow * const
 333         client = wxStaticCast(GetParent(), wxMDIClientWindow);
 334     wxCHECK( client, NULL );
 335
 336     return GTK_NOTEBOOK(client->m_widget);
 337 }
 338
 339 void wxMDIChildFrame::Activate()
 340 {
 341     GtkNotebook * const notebook = GTKGetNotebook();
 342     wxCHECK_RET( notebook, "no parent notebook?" );
 343
 344     gint pageno = gtk_notebook_page_num( notebook, m_widget );
 345     gtk_notebook_set_current_page( notebook, pageno );
 346 }
 347
 348 void wxMDIChildFrame::OnActivate( wxActivateEvent& WXUNUSED(event) )
 349 {
 350 }
 351
 352 void wxMDIChildFrame::OnMenuHighlight( wxMenuEvent& event )
 353 {
 354 #if wxUSE_STATUSBAR
 355     wxMDIParentFrame *mdi_frame = (wxMDIParentFrame*)m_parent->GetParent();
 356     if ( !ShowMenuHelp(event.GetMenuId()) )
 357     {
 358         // we don't have any help text for this item, but may be the MDI frame
 359         // does?
 360         mdi_frame->OnMenuHighlight(event);
 361     }
 362 #endif // wxUSE_STATUSBAR
 363 }
 364
 365 void wxMDIChildFrame::SetTitle( const wxString &title )
 366 {
 367     if ( title == m_title )
 368         return;
 369
 370     m_title = title;
 371
 372     GtkNotebook * const notebook = GTKGetNotebook();
 373     wxCHECK_RET( notebook, "no parent notebook?" );
 374     gtk_notebook_set_tab_label_text(notebook, m_widget, wxGTK_CONV( title ) );
 375 }
 376
 377 //-----------------------------------------------------------------------------
 378 // wxMDIClientWindow
 379 //-----------------------------------------------------------------------------
 380
 381 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 382
 383 wxMDIClientWindow::~wxMDIClientWindow()
 384 {
 385     // disconnect our handler because our ~wxWindow (which is going to be called
 386     // after this dtor) will call DestroyChildren(); in turns our children
 387     // ~wxWindow dtors will call wxWindow::Show(false) and this will generate
 388     // a call to gtk_mdi_page_change_callback with an invalid parent
 389     // (because gtk_mdi_page_change_callback expects a wxMDIClientWindow but
 390     //  at that point of the dtor chain we are a simple wxWindow!)
 391     g_signal_handlers_disconnect_by_func(m_widget, (void*)switch_page, GetParent());
 392 }
 393
 394 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
 395 {
 396     if ( !PreCreation( parent, wxDefaultPosition, wxDefaultSize ) ||
 397          !CreateBase( parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
 398                        style, wxDefaultValidator, "wxMDIClientWindow" ))
 399     {
 400         wxFAIL_MSG( "wxMDIClientWindow creation failed" );
 401         return false;
 402     }
 403
 404     m_widget = gtk_notebook_new();
 405     g_object_ref(m_widget);
 406
 407     g_signal_connect(m_widget, "switch_page", G_CALLBACK(switch_page), parent);
 408
 409     gtk_notebook_set_scrollable( GTK_NOTEBOOK(m_widget), 1 );
 410
 411     m_parent->DoAddChild( this );
 412
 413     PostCreation();
 414
 415     Show( true );
 416
 417     return true;
 418 }
 419
 420 void wxMDIClientWindow::AddChildGTK(wxWindowGTK* child)
 421 {
 422     wxMDIChildFrame* child_frame = static_cast<wxMDIChildFrame*>(child);
 423     wxString s = child_frame->GetTitle();
 424     if ( s.empty() )
 425         s = _("MDI child");
 426
 427     GtkWidget *label_widget = gtk_label_new( s.mbc_str() );
 428     gtk_misc_set_alignment( GTK_MISC(label_widget), 0.0, 0.5 );
 429
 430     GtkNotebook* notebook = GTK_NOTEBOOK(m_widget);
 431
 432     gtk_notebook_append_page( notebook, child->m_widget, label_widget );
 433
 434     wxMDIParentFrame* parent_frame = static_cast<wxMDIParentFrame*>(GetParent());
 435     parent_frame->m_justInserted = true;
 436 }
 437
 438 #endif // wxUSE_MDI