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