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     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 }
  64
  65 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  66                        const wxPoint &pos, const wxSize &size,
  67                        int n, const wxString choices[],
  68                        long style, const wxValidator& validator, const wxString &name )
  69 {
  70     m_needParent = TRUE;
  71 #if (GTK_MINOR_VERSION > 0)
  72     m_acceptsFocus = TRUE;
  73 #endif
  74
  75     if (!PreCreation( parent, pos, size ) ||
  76         !CreateBase( parent, id, pos, size, style, validator, name ))
  77     {
  78         wxFAIL_MSG( _T("wxChoice creation failed") );
  79         return FALSE;
  80     }
  81
  82     m_widget = gtk_option_menu_new();
  83
  84     wxSize newSize(size);
  85     if (newSize.x == -1)
  86         newSize.x = 80;
  87     if (newSize.y == -1)
  88         newSize.y = 26;
  89     SetSize( newSize.x, newSize.y );
  90
  91     GtkWidget *menu = gtk_menu_new();
  92
  93     for (int i = 0; i < n; i++)
  94     {
  95         m_clientDataList.Append( (wxObject*) NULL );
  96         m_clientObjectList.Append( (wxObject*) NULL );
  97
  98         GtkWidget *item = gtk_menu_item_new_with_label( choices[i].mbc_str() );
  99         gtk_menu_append( GTK_MENU(menu), item );
 100
 101         gtk_widget_show( item );
 102
 103         gtk_signal_connect( GTK_OBJECT( item ), "activate",
 104           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 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
 126 void wxChoice::AppendCommon( const wxString &item )
 127 {
 128     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 129
 130     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 131     GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
 132
 133     gtk_menu_append( GTK_MENU(menu), menu_item );
 134
 135     if (GTK_WIDGET_REALIZED(m_widget))
 136     {
 137         gtk_widget_realize( menu_item );
 138         gtk_widget_realize( GTK_BIN(menu_item)->child );
 139
 140         if (m_widgetStyle) ApplyWidgetStyle();
 141     }
 142
 143     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 144       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 145
 146     gtk_widget_show( menu_item );
 147 }
 148
 149 void wxChoice::Append( const wxString &item )
 150 {
 151     m_clientDataList.Append( (wxObject*) NULL );
 152     m_clientObjectList.Append( (wxObject*) NULL );
 153
 154     AppendCommon( item );
 155 }
 156
 157 void wxChoice::Append( const wxString &item, void *clientData )
 158 {
 159     m_clientDataList.Append( (wxObject*) clientData );
 160     m_clientObjectList.Append( (wxObject*) NULL );
 161
 162     AppendCommon( item );
 163 }
 164
 165 void wxChoice::Append( const wxString &item, wxClientData *clientData )
 166 {
 167     m_clientObjectList.Append( (wxObject*) clientData );
 168     m_clientDataList.Append( (wxObject*) NULL );
 169
 170     AppendCommon( item );
 171 }
 172
 173 void wxChoice::SetClientData( int n, void* clientData )
 174 {
 175     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 176
 177     wxNode *node = m_clientDataList.Nth( n );
 178     if (!node) return;
 179
 180     node->SetData( (wxObject*) clientData );
 181 }
 182
 183 void* wxChoice::GetClientData( int n )
 184 {
 185     wxCHECK_MSG( m_widget != NULL, NULL, _T("invalid combobox") );
 186
 187     wxNode *node = m_clientDataList.Nth( n );
 188     if (!node) return NULL;
 189
 190     return node->Data();
 191 }
 192
 193 void wxChoice::SetClientObject( int n, wxClientData* clientData )
 194 {
 195     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 196
 197     wxNode *node = m_clientObjectList.Nth( n );
 198     if (!node) return;
 199
 200     wxClientData *cd = (wxClientData*) node->Data();
 201     if (cd) delete cd;
 202
 203     node->SetData( (wxObject*) clientData );
 204 }
 205
 206 wxClientData* wxChoice::GetClientObject( int n )
 207 {
 208     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, _T("invalid combobox") );
 209
 210     wxNode *node = m_clientObjectList.Nth( n );
 211     if (!node) return (wxClientData*) NULL;
 212
 213     return (wxClientData*) node->Data();
 214 }
 215
 216 void wxChoice::Clear()
 217 {
 218     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 219
 220     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 221     GtkWidget *menu = gtk_menu_new();
 222     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 223
 224     wxNode *node = m_clientObjectList.First();
 225     while (node)
 226     {
 227         wxClientData *cd = (wxClientData*)node->Data();
 228         if (cd) delete cd;
 229         node = node->Next();
 230     }
 231     m_clientObjectList.Clear();
 232
 233     m_clientDataList.Clear();
 234 }
 235
 236 void wxChoice::Delete( int WXUNUSED(n) )
 237 {
 238     wxFAIL_MSG( _T("wxChoice:Delete not implemented") );
 239 }
 240
 241 int wxChoice::FindString( const wxString &string ) const
 242 {
 243     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid choice") );
 244
 245     // If you read this code once and you think you understand
 246     // it, then you are very wrong. Robert Roebling.
 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         GtkLabel *label = (GtkLabel *) NULL;
 255         if (bin->child) label = GTK_LABEL(bin->child);
 256         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 257
 258         wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 259
 260        if (string == wxString(label->label,*wxConvCurrent))
 261            return count;
 262
 263        child = child->next;
 264        count++;
 265     }
 266
 267     return -1;
 268 }
 269
 270 int wxChoice::GetColumns() const
 271 {
 272     return 1;
 273 }
 274
 275 int wxChoice::GetSelection()
 276 {
 277     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid choice") );
 278
 279     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 280     int count = 0;
 281     GList *child = menu_shell->children;
 282     while (child)
 283     {
 284         GtkBin *bin = GTK_BIN( child->data );
 285         if (!bin->child) return count;
 286         child = child->next;
 287         count++;
 288     }
 289
 290     return -1;
 291 }
 292
 293 wxString wxChoice::GetString( int n ) const
 294 {
 295     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid choice") );
 296
 297     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 298     int count = 0;
 299     GList *child = menu_shell->children;
 300     while (child)
 301     {
 302         GtkBin *bin = GTK_BIN( child->data );
 303         if (count == n)
 304         {
 305             GtkLabel *label = (GtkLabel *) NULL;
 306             if (bin->child) label = GTK_LABEL(bin->child);
 307             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 308
 309             wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 310
 311             return wxString(label->label,*wxConvCurrent);
 312         }
 313         child = child->next;
 314         count++;
 315     }
 316
 317     wxFAIL_MSG( _T("wxChoice: invalid index in GetString()") );
 318
 319     return _T("");
 320 }
 321
 322 wxString wxChoice::GetStringSelection() const
 323 {
 324     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid choice") );
 325
 326     GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 327
 328     wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 329
 330     return wxString(label->label,*wxConvCurrent);
 331 }
 332
 333 int wxChoice::Number() const
 334 {
 335     wxCHECK_MSG( m_widget != NULL, 0, _T("invalid choice") );
 336
 337     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 338     int count = 0;
 339     GList *child = menu_shell->children;
 340     while (child)
 341     {
 342         count++;
 343         child = child->next;
 344     }
 345     return count;
 346 }
 347
 348 void wxChoice::SetColumns( int WXUNUSED(n) )
 349 {
 350 }
 351
 352 void wxChoice::SetSelection( int n )
 353 {
 354     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 355
 356     int tmp = n;
 357     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 358 }
 359
 360 void wxChoice::SetStringSelection( const wxString &string )
 361 {
 362     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 363
 364     int n = FindString( string );
 365     if (n != -1) SetSelection( n );
 366 }
 367
 368 void wxChoice::DisableEvents()
 369 {
 370 /*
 371     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 372     GList *child = menu_shell->children;
 373     while (child)
 374     {
 375         gtk_signal_disconnect_by_func( GTK_OBJECT( child->data ),
 376           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 377
 378         child = child->next;
 379     }
 380 */
 381 }
 382
 383 void wxChoice::EnableEvents()
 384 {
 385 /*
 386     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 387     GList *child = menu_shell->children;
 388     while (child)
 389     {
 390         gtk_signal_connect( GTK_OBJECT( child->data ), "activate",
 391           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 392
 393         child = child->next;
 394     }
 395 */
 396 }
 397
 398 void wxChoice::ApplyWidgetStyle()
 399 {
 400     SetWidgetStyle();
 401
 402     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 403
 404     gtk_widget_set_style( m_widget, m_widgetStyle );
 405     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 406
 407     GList *child = menu_shell->children;
 408     while (child)
 409     {
 410         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 411
 412         GtkBin *bin = GTK_BIN( child->data );
 413         GtkWidget *label = (GtkWidget *) NULL;
 414         if (bin->child) label = bin->child;
 415         if (!label) label = GTK_BUTTON(m_widget)->child;
 416
 417         gtk_widget_set_style( label, m_widgetStyle );
 418
 419         child = child->next;
 420     }
 421 }
 422
 423 #endif