src/gtk1/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/choice.h"
  16
  17 #if wxUSE_CHOICE
  18
  19 #include "gdk/gdk.h"
  20 #include "gtk/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 bool   g_blockEventsOnDrag;
  34
  35 //-----------------------------------------------------------------------------
  36 // "activate"
  37 //-----------------------------------------------------------------------------
  38
  39 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  40 {
  41     if (g_isIdle)
  42       wxapp_install_idle_handler();
  43
  44     if (!choice->m_hasVMT) return;
  45
  46     if (g_blockEventsOnDrag) return;
  47
  48     wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  49     event.SetInt( choice->GetSelection() );
  50     event.SetString( choice->GetStringSelection() );
  51     event.SetEventObject(choice);
  52     choice->GetEventHandler()->ProcessEvent(event);
  53 }
  54
  55 //-----------------------------------------------------------------------------
  56 // wxChoice
  57 //-----------------------------------------------------------------------------
  58
  59 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  60
  61 wxChoice::wxChoice()
  62 {
  63     m_strings = (wxSortedArrayString *)NULL;
  64 }
  65
  66 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  67                        const wxPoint &pos, const wxSize &size,
  68                        int n, const wxString choices[],
  69                        long style, const wxValidator& validator, const wxString &name )
  70 {
  71     m_needParent = TRUE;
  72 #if (GTK_MINOR_VERSION > 0)
  73     m_acceptsFocus = TRUE;
  74 #endif
  75
  76     if (!PreCreation( parent, pos, size ) ||
  77         !CreateBase( parent, id, pos, size, style, validator, name ))
  78     {
  79         wxFAIL_MSG( wxT("wxChoice creation failed") );
  80         return FALSE;
  81     }
  82
  83     m_widget = gtk_option_menu_new();
  84
  85     wxSize newSize(size);
  86     if (newSize.x == -1)
  87         newSize.x = 80;
  88     if (newSize.y == -1)
  89         newSize.y = 26;
  90     SetSize( newSize.x, newSize.y );
  91
  92     if ( style & wxCB_SORT )
  93     {
  94         // if our m_strings != NULL, DoAppend() will check for it and insert
  95         // items in the correct order
  96         m_strings = new wxSortedArrayString;
  97     }
  98
  99     GtkWidget *menu = gtk_menu_new();
 100
 101     for (int i = 0; i < n; i++)
 102     {
 103         AppendHelper(menu, choices[i]);
 104     }
 105
 106     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 107
 108     m_parent->DoAddChild( this );
 109
 110     PostCreation();
 111
 112     SetBackgroundColour( parent->GetBackgroundColour() );
 113     SetForegroundColour( parent->GetForegroundColour() );
 114     SetFont( parent->GetFont() );
 115
 116     Show( TRUE );
 117
 118     return TRUE;
 119 }
 120
 121 wxChoice::~wxChoice()
 122 {
 123     Clear();
 124
 125     delete m_strings;
 126 }
 127
 128 int wxChoice::DoAppend( const wxString &item )
 129 {
 130     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 131
 132     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 133
 134     return AppendHelper(menu, item);
 135 }
 136
 137 void wxChoice::DoSetClientData( int n, void* clientData )
 138 {
 139     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 140
 141     wxNode *node = m_clientList.Nth( n );
 142     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetClientData") );
 143
 144     node->SetData( (wxObject*) clientData );
 145 }
 146
 147 void* wxChoice::DoGetClientData( int n ) const
 148 {
 149     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 150
 151     wxNode *node = m_clientList.Nth( n );
 152     wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetClientData") );
 153
 154     return node->Data();
 155 }
 156
 157 void wxChoice::DoSetClientObject( int n, wxClientData* clientData )
 158 {
 159     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 160
 161     wxNode *node = m_clientList.Nth( n );
 162     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetClientObject") );
 163
 164     wxClientData *cd = (wxClientData*) node->Data();
 165     delete cd;
 166
 167     node->SetData( (wxObject*) clientData );
 168 }
 169
 170 wxClientData* wxChoice::DoGetClientObject( int n ) const
 171 {
 172     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid combobox") );
 173
 174     wxNode *node = m_clientList.Nth( n );
 175     wxCHECK_MSG( node, (wxClientData *)NULL,
 176                  wxT("invalid index in wxChoice::DoGetClientObject") );
 177
 178     return (wxClientData*) node->Data();
 179 }
 180
 181 void wxChoice::Clear()
 182 {
 183     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 184
 185     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 186     GtkWidget *menu = gtk_menu_new();
 187     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 188
 189     if (m_clientDataItemsType == ClientData_Object)
 190     {
 191         wxNode *node = m_clientList.First();
 192         while (node)
 193         {
 194             wxClientData *cd = (wxClientData*)node->Data();
 195             if (cd) delete cd;
 196             node = node->Next();
 197         }
 198     }
 199     m_clientList.Clear();
 200 }
 201
 202 void wxChoice::Delete( int WXUNUSED(n) )
 203 {
 204     wxFAIL_MSG( wxT("wxChoice:Delete not implemented") );
 205 }
 206
 207 int wxChoice::FindString( const wxString &string ) const
 208 {
 209     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 210
 211     // If you read this code once and you think you understand
 212     // it, then you are very wrong. Robert Roebling.
 213
 214     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 215     int count = 0;
 216     GList *child = menu_shell->children;
 217     while (child)
 218     {
 219         GtkBin *bin = GTK_BIN( child->data );
 220         GtkLabel *label = (GtkLabel *) NULL;
 221         if (bin->child) label = GTK_LABEL(bin->child);
 222         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 223
 224         wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 225
 226        if (string == wxString(label->label,*wxConvCurrent))
 227            return count;
 228
 229        child = child->next;
 230        count++;
 231     }
 232
 233     return -1;
 234 }
 235
 236 int wxChoice::GetSelection() const
 237 {
 238     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 239
 240     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 241     int count = 0;
 242     GList *child = menu_shell->children;
 243     while (child)
 244     {
 245         GtkBin *bin = GTK_BIN( child->data );
 246         if (!bin->child) return count;
 247         child = child->next;
 248         count++;
 249     }
 250
 251     return -1;
 252 }
 253
 254 wxString wxChoice::GetString( int n ) const
 255 {
 256     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );
 257
 258     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 259     int count = 0;
 260     GList *child = menu_shell->children;
 261     while (child)
 262     {
 263         GtkBin *bin = GTK_BIN( child->data );
 264         if (count == n)
 265         {
 266             GtkLabel *label = (GtkLabel *) NULL;
 267             if (bin->child) label = GTK_LABEL(bin->child);
 268             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 269
 270             wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 271
 272             return wxString(label->label,*wxConvCurrent);
 273         }
 274         child = child->next;
 275         count++;
 276     }
 277
 278     wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
 279
 280     return wxT("");
 281 }
 282
 283 int wxChoice::GetCount() const
 284 {
 285     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
 286
 287     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 288     int count = 0;
 289     GList *child = menu_shell->children;
 290     while (child)
 291     {
 292         count++;
 293         child = child->next;
 294     }
 295     return count;
 296 }
 297
 298 void wxChoice::SetSelection( int n )
 299 {
 300     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 301
 302     int tmp = n;
 303     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 304 }
 305
 306 void wxChoice::DisableEvents()
 307 {
 308 /*
 309     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 310     GList *child = menu_shell->children;
 311     while (child)
 312     {
 313         gtk_signal_disconnect_by_func( GTK_OBJECT( child->data ),
 314           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 315
 316         child = child->next;
 317     }
 318 */
 319 }
 320
 321 void wxChoice::EnableEvents()
 322 {
 323 /*
 324     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 325     GList *child = menu_shell->children;
 326     while (child)
 327     {
 328         gtk_signal_connect( GTK_OBJECT( child->data ), "activate",
 329           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 330
 331         child = child->next;
 332     }
 333 */
 334 }
 335
 336 void wxChoice::ApplyWidgetStyle()
 337 {
 338     SetWidgetStyle();
 339
 340     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 341
 342     gtk_widget_set_style( m_widget, m_widgetStyle );
 343     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 344
 345     GList *child = menu_shell->children;
 346     while (child)
 347     {
 348         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 349
 350         GtkBin *bin = GTK_BIN( child->data );
 351         GtkWidget *label = (GtkWidget *) NULL;
 352         if (bin->child) label = bin->child;
 353         if (!label) label = GTK_BUTTON(m_widget)->child;
 354
 355         gtk_widget_set_style( label, m_widgetStyle );
 356
 357         child = child->next;
 358     }
 359 }
 360
 361 size_t wxChoice::AppendHelper(GtkWidget *menu, const wxString& item)
 362 {
 363     GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
 364
 365     size_t index;
 366     if ( m_strings )
 367     {
 368         // sorted control, need to insert at the correct index
 369         index = m_strings->Add(item);
 370
 371         gtk_menu_insert( GTK_MENU(menu), menu_item, index );
 372
 373         if ( index )
 374         {
 375             m_clientList.Insert( m_clientList.Item(index - 1),
 376                                  (wxObject*) NULL );
 377         }
 378         else
 379         {
 380             // can't use Insert() :-(
 381             m_clientList.Append( (wxObject*) NULL );
 382         }
 383     }
 384     else
 385     {
 386         // normal control, just append
 387         gtk_menu_append( GTK_MENU(menu), menu_item );
 388
 389         m_clientList.Append( (wxObject*) NULL );
 390
 391         // don't call wxChoice::GetCount() from here because it doesn't work
 392         // if we're called from ctor (and GtkMenuShell is still NULL)
 393         index = m_clientList.GetCount();
 394     }
 395
 396     if (GTK_WIDGET_REALIZED(m_widget))
 397     {
 398         gtk_widget_realize( menu_item );
 399         gtk_widget_realize( GTK_BIN(menu_item)->child );
 400
 401         if (m_widgetStyle) ApplyWidgetStyle();
 402     }
 403
 404     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 405       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 406
 407     gtk_widget_show( menu_item );
 408
 409     // return the index of the item in the control
 410     return index;
 411 }
 412
 413 #endif