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 #include "gdk/gdk.h"
  18 #include "gtk/gtk.h"
  19
  20 //-----------------------------------------------------------------------------
  21 // idle system
  22 //-----------------------------------------------------------------------------
  23
  24 extern void wxapp_install_idle_handler();
  25 extern bool g_isIdle;
  26
  27 //-----------------------------------------------------------------------------
  28 // data
  29 //-----------------------------------------------------------------------------
  30
  31 extern bool   g_blockEventsOnDrag;
  32
  33 //-----------------------------------------------------------------------------
  34 // "activate"
  35 //-----------------------------------------------------------------------------
  36
  37 static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  38 {
  39     if (g_isIdle) wxapp_install_idle_handler();
  40
  41     if (!choice->m_hasVMT) return;
  42
  43     if (g_blockEventsOnDrag) return;
  44
  45     wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  46     event.SetInt( choice->GetSelection() );
  47     event.SetString( choice->GetStringSelection() );
  48     event.SetEventObject(choice);
  49     choice->GetEventHandler()->ProcessEvent(event);
  50 }
  51
  52 //-----------------------------------------------------------------------------
  53 // wxChoice
  54 //-----------------------------------------------------------------------------
  55
  56 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  57
  58 wxChoice::wxChoice()
  59 {
  60 }
  61
  62 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  63                        const wxPoint &pos, const wxSize &size,
  64                        int n, const wxString choices[],
  65                        long style, const wxValidator& validator, const wxString &name )
  66 {
  67     m_needParent = TRUE;
  68 #if (GTK_MINOR_VERSION > 0)
  69     m_acceptsFocus = TRUE;
  70 #endif
  71
  72     PreCreation( parent, id, pos, size, style, name );
  73
  74     SetValidator( validator );
  75
  76     m_widget = gtk_option_menu_new();
  77
  78     wxSize newSize(size);
  79     if (newSize.x == -1)
  80         newSize.x = 80;
  81     if (newSize.y == -1)
  82         newSize.y = 26;
  83     SetSize( newSize.x, newSize.y );
  84
  85     GtkWidget *menu = gtk_menu_new();
  86
  87     for (int i = 0; i < n; i++)
  88     {
  89         m_clientDataList.Append( (wxObject*) NULL );
  90         m_clientObjectList.Append( (wxObject*) NULL );
  91
  92         GtkWidget *item = gtk_menu_item_new_with_label( choices[i].mbc_str() );
  93         gtk_menu_append( GTK_MENU(menu), item );
  94
  95         gtk_widget_show( item );
  96
  97         gtk_signal_connect( GTK_OBJECT( item ), "activate",
  98           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
  99     }
 100     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 101
 102     m_parent->DoAddChild( this );
 103
 104     PostCreation();
 105
 106     SetBackgroundColour( parent->GetBackgroundColour() );
 107     SetForegroundColour( parent->GetForegroundColour() );
 108     SetFont( parent->GetFont() );
 109
 110     Show( TRUE );
 111
 112     return TRUE;
 113 }
 114
 115 wxChoice::~wxChoice()
 116 {
 117     Clear();
 118 }
 119
 120 void wxChoice::AppendCommon( const wxString &item )
 121 {
 122     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 123
 124     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 125     GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
 126
 127     gtk_menu_append( GTK_MENU(menu), menu_item );
 128
 129     if (GTK_WIDGET_REALIZED(m_widget))
 130     {
 131         gtk_widget_realize( menu_item );
 132         gtk_widget_realize( GTK_BIN(menu_item)->child );
 133
 134         if (m_widgetStyle) ApplyWidgetStyle();
 135     }
 136
 137     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 138       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 139
 140     gtk_widget_show( menu_item );
 141 }
 142
 143 void wxChoice::Append( const wxString &item )
 144 {
 145     m_clientDataList.Append( (wxObject*) NULL );
 146     m_clientObjectList.Append( (wxObject*) NULL );
 147
 148     AppendCommon( item );
 149 }
 150
 151 void wxChoice::Append( const wxString &item, void *clientData )
 152 {
 153     m_clientDataList.Append( (wxObject*) clientData );
 154     m_clientObjectList.Append( (wxObject*) NULL );
 155
 156     AppendCommon( item );
 157 }
 158
 159 void wxChoice::Append( const wxString &item, wxClientData *clientData )
 160 {
 161     m_clientObjectList.Append( (wxObject*) clientData );
 162     m_clientDataList.Append( (wxObject*) NULL );
 163
 164     AppendCommon( item );
 165 }
 166
 167 void wxChoice::SetClientData( int n, void* clientData )
 168 {
 169     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 170
 171     wxNode *node = m_clientDataList.Nth( n );
 172     if (!node) return;
 173
 174     node->SetData( (wxObject*) clientData );
 175 }
 176
 177 void* wxChoice::GetClientData( int n )
 178 {
 179     wxCHECK_MSG( m_widget != NULL, NULL, _T("invalid combobox") );
 180
 181     wxNode *node = m_clientDataList.Nth( n );
 182     if (!node) return NULL;
 183
 184     return node->Data();
 185 }
 186
 187 void wxChoice::SetClientObject( int n, wxClientData* clientData )
 188 {
 189     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 190
 191     wxNode *node = m_clientObjectList.Nth( n );
 192     if (!node) return;
 193
 194     wxClientData *cd = (wxClientData*) node->Data();
 195     if (cd) delete cd;
 196
 197     node->SetData( (wxObject*) clientData );
 198 }
 199
 200 wxClientData* wxChoice::GetClientObject( int n )
 201 {
 202     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, _T("invalid combobox") );
 203
 204     wxNode *node = m_clientObjectList.Nth( n );
 205     if (!node) return (wxClientData*) NULL;
 206
 207     return (wxClientData*) node->Data();
 208 }
 209
 210 void wxChoice::Clear()
 211 {
 212     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 213
 214     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 215     GtkWidget *menu = gtk_menu_new();
 216     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 217
 218     wxNode *node = m_clientObjectList.First();
 219     while (node)
 220     {
 221         wxClientData *cd = (wxClientData*)node->Data();
 222         if (cd) delete cd;
 223         node = node->Next();
 224     }
 225     m_clientObjectList.Clear();
 226
 227     m_clientDataList.Clear();
 228 }
 229
 230 void wxChoice::Delete( int WXUNUSED(n) )
 231 {
 232     wxFAIL_MSG( _T("wxChoice:Delete not implemented") );
 233 }
 234
 235 int wxChoice::FindString( const wxString &string ) const
 236 {
 237     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid choice") );
 238
 239     // If you read this code once and you think you understand
 240     // it, then you are very wrong. Robert Roebling.
 241
 242     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 243     int count = 0;
 244     GList *child = menu_shell->children;
 245     while (child)
 246     {
 247         GtkBin *bin = GTK_BIN( child->data );
 248         GtkLabel *label = (GtkLabel *) NULL;
 249         if (bin->child) label = GTK_LABEL(bin->child);
 250         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 251
 252         wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 253
 254        if (string == wxString(label->label,*wxConvCurrent))
 255            return count;
 256
 257        child = child->next;
 258        count++;
 259     }
 260
 261     return -1;
 262 }
 263
 264 int wxChoice::GetColumns() const
 265 {
 266     return 1;
 267 }
 268
 269 int wxChoice::GetSelection()
 270 {
 271     wxCHECK_MSG( m_widget != NULL, -1, _T("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 (!bin->child) return count;
 280         child = child->next;
 281         count++;
 282     }
 283
 284     wxFAIL_MSG( _T("wxChoice: no selection") );
 285
 286     return -1;
 287 }
 288
 289 wxString wxChoice::GetString( int n ) const
 290 {
 291     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid choice") );
 292
 293     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 294     int count = 0;
 295     GList *child = menu_shell->children;
 296     while (child)
 297     {
 298         GtkBin *bin = GTK_BIN( child->data );
 299         if (count == n)
 300         {
 301             GtkLabel *label = (GtkLabel *) NULL;
 302             if (bin->child) label = GTK_LABEL(bin->child);
 303             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 304
 305             wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 306
 307             return wxString(label->label,*wxConvCurrent);
 308         }
 309         child = child->next;
 310         count++;
 311     }
 312
 313     wxFAIL_MSG( _T("wxChoice: invalid index in GetString()") );
 314
 315     return _T("");
 316 }
 317
 318 wxString wxChoice::GetStringSelection() const
 319 {
 320     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid choice") );
 321
 322     GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 323
 324     wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 325
 326     return wxString(label->label,*wxConvCurrent);
 327 }
 328
 329 int wxChoice::Number() const
 330 {
 331     wxCHECK_MSG( m_widget != NULL, 0, _T("invalid choice") );
 332
 333     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 334     int count = 0;
 335     GList *child = menu_shell->children;
 336     while (child)
 337     {
 338         count++;
 339         child = child->next;
 340     }
 341     return count;
 342 }
 343
 344 void wxChoice::SetColumns( int WXUNUSED(n) )
 345 {
 346 }
 347
 348 void wxChoice::SetSelection( int n )
 349 {
 350     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 351
 352     int tmp = n;
 353     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 354
 355     gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 356 }
 357
 358 void wxChoice::SetStringSelection( const wxString &string )
 359 {
 360     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 361
 362     int n = FindString( string );
 363     if (n != -1) SetSelection( n );
 364 }
 365
 366 void wxChoice::ApplyWidgetStyle()
 367 {
 368     SetWidgetStyle();
 369
 370     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 371
 372     gtk_widget_set_style( m_widget, m_widgetStyle );
 373     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 374
 375     GList *child = menu_shell->children;
 376     while (child)
 377     {
 378         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 379
 380         GtkBin *bin = GTK_BIN( child->data );
 381         GtkWidget *label = (GtkWidget *) NULL;
 382         if (bin->child) label = bin->child;
 383         if (!label) label = GTK_BUTTON(m_widget)->child;
 384
 385         gtk_widget_set_style( label, m_widgetStyle );
 386
 387         child = child->next;
 388     }
 389 }
 390