src/gtk/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        choice.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "choice.h"
  13 #endif
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_CHOICE
  18
  19 #include "wx/choice.h"
  20 #include "wx/arrstr.h"
  21
  22 #include "wx/gtk/private.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // idle system
  26 //-----------------------------------------------------------------------------
  27
  28 extern void wxapp_install_idle_handler();
  29 extern bool g_isIdle;
  30
  31 //-----------------------------------------------------------------------------
  32 // data
  33 //-----------------------------------------------------------------------------
  34
  35 extern bool   g_blockEventsOnDrag;
  36
  37 //-----------------------------------------------------------------------------
  38 // "activate"
  39 //-----------------------------------------------------------------------------
  40
  41 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  42 {
  43     if (g_isIdle)
  44       wxapp_install_idle_handler();
  45
  46     if (!choice->m_hasVMT) return;
  47
  48     if (g_blockEventsOnDrag) return;
  49
  50     wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  51     int n = choice->GetSelection();
  52
  53     event.SetInt( n );
  54     event.SetString( choice->GetStringSelection() );
  55     event.SetEventObject(choice);
  56
  57     if ( choice->HasClientObjectData() )
  58         event.SetClientObject( choice->GetClientObject(n) );
  59     else if ( choice->HasClientUntypedData() )
  60         event.SetClientData( choice->GetClientData(n) );
  61
  62     choice->GetEventHandler()->ProcessEvent(event);
  63 }
  64
  65 //-----------------------------------------------------------------------------
  66 // wxChoice
  67 //-----------------------------------------------------------------------------
  68
  69 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  70
  71 wxChoice::wxChoice()
  72 {
  73     m_strings = (wxSortedArrayString *)NULL;
  74 }
  75
  76 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  77                        const wxPoint &pos, const wxSize &size,
  78                        int n, const wxString choices[],
  79                        long style, const wxValidator& validator, const wxString &name )
  80 {
  81     m_needParent = TRUE;
  82 #if (GTK_MINOR_VERSION > 0)
  83     m_acceptsFocus = TRUE;
  84 #endif
  85
  86     if (!PreCreation( parent, pos, size ) ||
  87         !CreateBase( parent, id, pos, size, style, validator, name ))
  88     {
  89         wxFAIL_MSG( wxT("wxChoice creation failed") );
  90         return FALSE;
  91     }
  92
  93     m_widget = gtk_option_menu_new();
  94
  95     if ( style & wxCB_SORT )
  96     {
  97         // if our m_strings != NULL, DoAppend() will check for it and insert
  98         // items in the correct order
  99         m_strings = new wxSortedArrayString;
 100     }
 101
 102     GtkWidget *menu = gtk_menu_new();
 103
 104     for (int i = 0; i < n; i++)
 105     {
 106         GtkAddHelper(menu, i, choices[i]);
 107     }
 108
 109     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 110
 111     m_parent->DoAddChild( this );
 112
 113     PostCreation();
 114
 115     SetFont( parent->GetFont() );
 116
 117     SetBestSize(size);
 118
 119     SetBackgroundColour( parent->GetBackgroundColour() );
 120     SetForegroundColour( parent->GetForegroundColour() );
 121
 122     Show( TRUE );
 123
 124     return TRUE;
 125 }
 126
 127 wxChoice::~wxChoice()
 128 {
 129     Clear();
 130
 131     delete m_strings;
 132 }
 133
 134 int wxChoice::DoAppend( const wxString &item )
 135 {
 136     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
 137
 138     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 139
 140     return GtkAddHelper(menu, GetCount(), item);
 141 }
 142
 143 int wxChoice::DoInsert( const wxString &item, int pos )
 144 {
 145     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
 146     wxCHECK_MSG( (pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
 147
 148     if (pos == GetCount())
 149         return DoAppend(item);
 150
 151     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 152
 153     return GtkAddHelper(menu, pos, item);
 154 }
 155
 156 void wxChoice::DoSetItemClientData( int n, void* clientData )
 157 {
 158     wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
 159
 160     wxList::compatibility_iterator node = m_clientList.Item( n );
 161     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") );
 162
 163     node->SetData( (wxObject*) clientData );
 164 }
 165
 166 void* wxChoice::DoGetItemClientData( int n ) const
 167 {
 168     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") );
 169
 170     wxList::compatibility_iterator node = m_clientList.Item( n );
 171     wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );
 172
 173     return node->GetData();
 174 }
 175
 176 void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
 177 {
 178     wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
 179
 180     wxList::compatibility_iterator node = m_clientList.Item( n );
 181     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );
 182
 183     // wxItemContainer already deletes data for us
 184
 185     node->SetData( (wxObject*) clientData );
 186 }
 187
 188 wxClientData* wxChoice::DoGetItemClientObject( int n ) const
 189 {
 190     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") );
 191
 192     wxList::compatibility_iterator node = m_clientList.Item( n );
 193     wxCHECK_MSG( node, (wxClientData *)NULL,
 194                  wxT("invalid index in wxChoice::DoGetItemClientObject") );
 195
 196     return (wxClientData*) node->GetData();
 197 }
 198
 199 void wxChoice::Clear()
 200 {
 201     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 202
 203     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 204     GtkWidget *menu = gtk_menu_new();
 205     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 206
 207     if ( HasClientObjectData() )
 208     {
 209         // destroy the data (due to Robert's idea of using wxList<wxObject>
 210         // and not wxList<wxClientData> we can't just say
 211         // m_clientList.DeleteContents(TRUE) - this would crash!
 212         wxList::compatibility_iterator node = m_clientList.GetFirst();
 213         while ( node )
 214         {
 215             delete (wxClientData *)node->GetData();
 216             node = node->GetNext();
 217         }
 218     }
 219     m_clientList.Clear();
 220
 221     if ( m_strings )
 222         m_strings->Clear();
 223 }
 224
 225 void wxChoice::Delete( int n )
 226 {
 227     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 228
 229     // VZ: apparently GTK+ doesn't have a built-in function to do it (not even
 230     //     in 2.0), hence this dump implementation - still better than nothing
 231     int i,
 232         count = GetCount();
 233
 234     wxCHECK_RET( n >= 0 && n < count, _T("invalid index in wxChoice::Delete") );
 235
 236     wxArrayString items;
 237     items.Alloc(count);
 238     for ( i = 0; i < count; i++ )
 239     {
 240         if ( i != n )
 241             items.Add(GetString(i));
 242     }
 243
 244     Clear();
 245
 246     for ( i = 0; i < count - 1; i++ )
 247     {
 248         Append(items[i]);
 249     }
 250 }
 251
 252 int wxChoice::FindString( const wxString &string ) const
 253 {
 254     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 255
 256     // If you read this code once and you think you understand
 257     // it, then you are very wrong. Robert Roebling.
 258
 259     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 260     int count = 0;
 261     GList *child = menu_shell->children;
 262     while (child)
 263     {
 264         GtkBin *bin = GTK_BIN( child->data );
 265         GtkLabel *label = (GtkLabel *) NULL;
 266         if (bin->child)
 267             label = GTK_LABEL(bin->child);
 268         if (!label)
 269             label = GTK_LABEL( BUTTON_CHILD(m_widget) );
 270
 271         wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 272
 273 #ifdef __WXGTK20__
 274          wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
 275 #else
 276          wxString tmp( label->label );
 277 #endif
 278         if (string == tmp)
 279             return count;
 280
 281         child = child->next;
 282         count++;
 283     }
 284
 285     return -1;
 286 }
 287
 288 int wxChoice::GetSelection() const
 289 {
 290     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 291
 292 #ifdef __WXGTK20__
 293
 294     return gtk_option_menu_get_history( GTK_OPTION_MENU(m_widget) );
 295
 296 #else
 297     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 298     int count = 0;
 299
 300     GList *child = menu_shell->children;
 301     while (child)
 302     {
 303         GtkBin *bin = GTK_BIN( child->data );
 304         if (!bin->child) return count;
 305         child = child->next;
 306         count++;
 307     }
 308
 309     return -1;
 310 #endif
 311 }
 312
 313 void wxChoice::SetString( int WXUNUSED(n), const wxString& WXUNUSED(string) )
 314 {
 315     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 316
 317     wxFAIL_MSG(wxT("not implemented"));
 318 }
 319
 320 wxString wxChoice::GetString( int n ) const
 321 {
 322     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );
 323
 324     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 325     int count = 0;
 326     GList *child = menu_shell->children;
 327     while (child)
 328     {
 329         GtkBin *bin = GTK_BIN( child->data );
 330         if (count == n)
 331         {
 332             GtkLabel *label = (GtkLabel *) NULL;
 333             if (bin->child)
 334                 label = GTK_LABEL(bin->child);
 335             if (!label)
 336                 label = GTK_LABEL( BUTTON_CHILD(m_widget) );
 337
 338             wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 339
 340 #ifdef __WXGTK20__
 341             return wxString( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
 342 #else
 343             return wxString( label->label );
 344 #endif
 345         }
 346         child = child->next;
 347         count++;
 348     }
 349
 350     wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
 351
 352     return wxT("");
 353 }
 354
 355 int wxChoice::GetCount() const
 356 {
 357     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
 358
 359     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 360     int count = 0;
 361     GList *child = menu_shell->children;
 362     while (child)
 363     {
 364         count++;
 365         child = child->next;
 366     }
 367     return count;
 368 }
 369
 370 void wxChoice::SetSelection( int n )
 371 {
 372     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 373
 374     int tmp = n;
 375     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 376 }
 377
 378 void wxChoice::ApplyWidgetStyle()
 379 {
 380     SetWidgetStyle();
 381
 382     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 383
 384     gtk_widget_set_style( m_widget, m_widgetStyle );
 385     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 386
 387     GList *child = menu_shell->children;
 388     while (child)
 389     {
 390         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 391
 392         GtkBin *bin = GTK_BIN( child->data );
 393         GtkWidget *label = (GtkWidget *) NULL;
 394         if (bin->child)
 395             label = bin->child;
 396         if (!label)
 397             label = BUTTON_CHILD(m_widget);
 398
 399         gtk_widget_set_style( label, m_widgetStyle );
 400
 401         child = child->next;
 402     }
 403 }
 404
 405 int wxChoice::GtkAddHelper(GtkWidget *menu, int pos, const wxString& item)
 406 {
 407     wxCHECK_MSG((pos>=0) && (pos<=(int)m_clientList.GetCount()), -1, wxT("invalid index"));
 408
 409     GtkWidget *menu_item = gtk_menu_item_new_with_label( wxGTK_CONV( item ) );
 410
 411     size_t index;
 412     if ( m_strings )
 413     {
 414         // sorted control, need to insert at the correct index
 415         index = m_strings->Add(item);
 416
 417         gtk_menu_insert( GTK_MENU(menu), menu_item, index );
 418
 419         if ( index )
 420         {
 421             m_clientList.Insert( m_clientList.Item(index - 1),
 422                                  (wxObject*) NULL );
 423         }
 424         else
 425         {
 426             m_clientList.Insert( (wxObject*) NULL );
 427         }
 428     }
 429     else
 430     {
 431         // don't call wxChoice::GetCount() from here because it doesn't work
 432         // if we're called from ctor (and GtkMenuShell is still NULL)
 433
 434         // normal control, just append
 435         if (pos == (int)m_clientList.GetCount())
 436         {
 437         gtk_menu_append( GTK_MENU(menu), menu_item );
 438         m_clientList.Append( (wxObject*) NULL );
 439         index = m_clientList.GetCount() - 1;
 440         }
 441         else
 442         {
 443             gtk_menu_insert( GTK_MENU(menu), menu_item, pos );
 444             m_clientList.Insert( pos, (wxObject*) NULL );
 445             index = pos;
 446         }
 447     }
 448
 449     if (GTK_WIDGET_REALIZED(m_widget))
 450     {
 451         gtk_widget_realize( menu_item );
 452         gtk_widget_realize( GTK_BIN(menu_item)->child );
 453
 454         if (m_widgetStyle) ApplyWidgetStyle();
 455     }
 456
 457     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 458       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 459
 460     gtk_widget_show( menu_item );
 461
 462     // return the index of the item in the control
 463     return index;
 464 }
 465
 466 wxSize wxChoice::DoGetBestSize() const
 467 {
 468     wxSize ret( wxControl::DoGetBestSize() );
 469
 470     // we know better our horizontal extent: it depends on the longest string
 471     // we have
 472     ret.x = 0;
 473     if ( m_widget )
 474     {
 475         int width;
 476         size_t count = GetCount();
 477         for ( size_t n = 0; n < count; n++ )
 478         {
 479             GetTextExtent( GetString(n), &width, NULL, NULL, NULL, &m_font );
 480             if ( width > ret.x )
 481                 ret.x = width;
 482         }
 483
 484         // add extra for the choice "=" button
 485
 486         // VZ: I don't know how to get the right value, it seems to be in
 487         //     GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get
 488         //     to it - maybe we can use gtk_option_menu_size_request() for this
 489         //     somehow?
 490         //
 491         //     This default value works only for the default GTK+ theme (i.e.
 492         //     no theme at all) (FIXME)
 493         static const int widthChoiceIndicator = 35;
 494         ret.x += widthChoiceIndicator;
 495     }
 496
 497     // but not less than the minimal width
 498     if ( ret.x < 80 )
 499         ret.x = 80;
 500
 501     ret.y = 16 + GetCharHeight();
 502
 503     return ret;
 504 }
 505
 506 bool wxChoice::IsOwnGtkWindow( GdkWindow *window )
 507 {
 508 #ifdef __WXGTK20__
 509     return GTK_BUTTON(m_widget)->event_window;
 510 #else
 511     return (window == m_widget->window);
 512 #endif
 513 }
 514
 515
 516 #endif // wxUSE_CHOICE
 517