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( wxT("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_clientList.Append( (wxObject*) NULL );
  96
  97         GtkWidget *item = gtk_menu_item_new_with_label( choices[i].mbc_str() );
  98         gtk_menu_append( GTK_MENU(menu), item );
  99
 100         gtk_widget_show( item );
 101
 102         gtk_signal_connect( GTK_OBJECT( item ), "activate",
 103           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 104     }
 105     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 106
 107     m_parent->DoAddChild( this );
 108
 109     PostCreation();
 110
 111     SetBackgroundColour( parent->GetBackgroundColour() );
 112     SetForegroundColour( parent->GetForegroundColour() );
 113     SetFont( parent->GetFont() );
 114
 115     Show( TRUE );
 116
 117     return TRUE;
 118 }
 119
 120 wxChoice::~wxChoice()
 121 {
 122     Clear();
 123 }
 124
 125 int wxChoice::DoAppend( const wxString &item )
 126 {
 127     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 128
 129     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 130     GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
 131
 132     gtk_menu_append( GTK_MENU(menu), menu_item );
 133
 134     if (GTK_WIDGET_REALIZED(m_widget))
 135     {
 136         gtk_widget_realize( menu_item );
 137         gtk_widget_realize( GTK_BIN(menu_item)->child );
 138
 139         if (m_widgetStyle) ApplyWidgetStyle();
 140     }
 141
 142     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 143       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 144
 145     gtk_widget_show( menu_item );
 146
 147     m_clientList.Append( (wxObject*) NULL );
 148
 149     // return the index of the item in the control
 150     return GetCount() - 1;
 151 }
 152
 153 void wxChoice::DoSetClientData( int n, void* clientData )
 154 {
 155     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 156
 157     wxNode *node = m_clientList.Nth( n );
 158     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetClientData") );
 159
 160     node->SetData( (wxObject*) clientData );
 161 }
 162
 163 void* wxChoice::DoGetClientData( int n ) const
 164 {
 165     wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 166
 167     wxNode *node = m_clientList.Nth( n );
 168     wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetClientData") );
 169
 170     return node->Data();
 171 }
 172
 173 void wxChoice::DoSetClientObject( int n, wxClientData* clientData )
 174 {
 175     wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 176
 177     wxNode *node = m_clientList.Nth( n );
 178     wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetClientObject") );
 179
 180     wxClientData *cd = (wxClientData*) node->Data();
 181     delete cd;
 182
 183     node->SetData( (wxObject*) clientData );
 184 }
 185
 186 wxClientData* wxChoice::DoGetClientObject( int n ) const
 187 {
 188     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid combobox") );
 189
 190     wxNode *node = m_clientList.Nth( n );
 191     wxCHECK_MSG( node, (wxClientData *)NULL,
 192                  wxT("invalid index in wxChoice::DoGetClientObject") );
 193
 194     return (wxClientData*) node->Data();
 195 }
 196
 197 void wxChoice::Clear()
 198 {
 199     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 200
 201     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 202     GtkWidget *menu = gtk_menu_new();
 203     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 204
 205     if (m_clientDataItemsType == ClientData_Object)
 206     {
 207         wxNode *node = m_clientList.First();
 208         while (node)
 209         {
 210             wxClientData *cd = (wxClientData*)node->Data();
 211             if (cd) delete cd;
 212             node = node->Next();
 213         }
 214     }
 215     m_clientList.Clear();
 216 }
 217
 218 void wxChoice::Delete( int WXUNUSED(n) )
 219 {
 220     wxFAIL_MSG( wxT("wxChoice:Delete not implemented") );
 221 }
 222
 223 int wxChoice::FindString( const wxString &string ) const
 224 {
 225     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 226
 227     // If you read this code once and you think you understand
 228     // it, then you are very wrong. Robert Roebling.
 229
 230     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 231     int count = 0;
 232     GList *child = menu_shell->children;
 233     while (child)
 234     {
 235         GtkBin *bin = GTK_BIN( child->data );
 236         GtkLabel *label = (GtkLabel *) NULL;
 237         if (bin->child) label = GTK_LABEL(bin->child);
 238         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 239
 240         wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 241
 242        if (string == wxString(label->label,*wxConvCurrent))
 243            return count;
 244
 245        child = child->next;
 246        count++;
 247     }
 248
 249     return -1;
 250 }
 251
 252 int wxChoice::GetSelection() const
 253 {
 254     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
 255
 256     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 257     int count = 0;
 258     GList *child = menu_shell->children;
 259     while (child)
 260     {
 261         GtkBin *bin = GTK_BIN( child->data );
 262         if (!bin->child) return count;
 263         child = child->next;
 264         count++;
 265     }
 266
 267     return -1;
 268 }
 269
 270 wxString wxChoice::GetString( int n ) const
 271 {
 272     wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );
 273
 274     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 275     int count = 0;
 276     GList *child = menu_shell->children;
 277     while (child)
 278     {
 279         GtkBin *bin = GTK_BIN( child->data );
 280         if (count == n)
 281         {
 282             GtkLabel *label = (GtkLabel *) NULL;
 283             if (bin->child) label = GTK_LABEL(bin->child);
 284             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 285
 286             wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
 287
 288             return wxString(label->label,*wxConvCurrent);
 289         }
 290         child = child->next;
 291         count++;
 292     }
 293
 294     wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
 295
 296     return wxT("");
 297 }
 298
 299 int wxChoice::GetCount() const
 300 {
 301     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
 302
 303     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 304     int count = 0;
 305     GList *child = menu_shell->children;
 306     while (child)
 307     {
 308         count++;
 309         child = child->next;
 310     }
 311     return count;
 312 }
 313
 314 void wxChoice::SetSelection( int n )
 315 {
 316     wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
 317
 318     int tmp = n;
 319     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 320 }
 321
 322 void wxChoice::DisableEvents()
 323 {
 324 /*
 325     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 326     GList *child = menu_shell->children;
 327     while (child)
 328     {
 329         gtk_signal_disconnect_by_func( GTK_OBJECT( child->data ),
 330           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 331
 332         child = child->next;
 333     }
 334 */
 335 }
 336
 337 void wxChoice::EnableEvents()
 338 {
 339 /*
 340     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 341     GList *child = menu_shell->children;
 342     while (child)
 343     {
 344         gtk_signal_connect( GTK_OBJECT( child->data ), "activate",
 345           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 346
 347         child = child->next;
 348     }
 349 */
 350 }
 351
 352 void wxChoice::ApplyWidgetStyle()
 353 {
 354     SetWidgetStyle();
 355
 356     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 357
 358     gtk_widget_set_style( m_widget, m_widgetStyle );
 359     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 360
 361     GList *child = menu_shell->children;
 362     while (child)
 363     {
 364         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 365
 366         GtkBin *bin = GTK_BIN( child->data );
 367         GtkWidget *label = (GtkWidget *) NULL;
 368         if (bin->child) label = bin->child;
 369         if (!label) label = GTK_BUTTON(m_widget)->child;
 370
 371         gtk_widget_set_style( label, m_widgetStyle );
 372
 373         child = child->next;
 374     }
 375 }
 376
 377 #endif