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) wxapp_install_idle_handler();
  42
  43     if (!choice->m_hasVMT) return;
  44
  45     if (g_blockEventsOnDrag) return;
  46
  47     wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
  48     event.SetInt( choice->GetSelection() );
  49     event.SetString( choice->GetStringSelection() );
  50     event.SetEventObject(choice);
  51     choice->GetEventHandler()->ProcessEvent(event);
  52 }
  53
  54 //-----------------------------------------------------------------------------
  55 // wxChoice
  56 //-----------------------------------------------------------------------------
  57
  58 IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
  59
  60 wxChoice::wxChoice()
  61 {
  62 }
  63
  64 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  65                        const wxPoint &pos, const wxSize &size,
  66                        int n, const wxString choices[],
  67                        long style, const wxValidator& validator, const wxString &name )
  68 {
  69     m_needParent = TRUE;
  70 #if (GTK_MINOR_VERSION > 0)
  71     m_acceptsFocus = TRUE;
  72 #endif
  73
  74     PreCreation( parent, id, pos, size, style, name );
  75
  76 #if wxUSE_VALIDATORS
  77     SetValidator( validator );
  78 #endif
  79
  80     m_widget = gtk_option_menu_new();
  81
  82     wxSize newSize(size);
  83     if (newSize.x == -1)
  84         newSize.x = 80;
  85     if (newSize.y == -1)
  86         newSize.y = 26;
  87     SetSize( newSize.x, newSize.y );
  88
  89     GtkWidget *menu = gtk_menu_new();
  90
  91     for (int i = 0; i < n; i++)
  92     {
  93         m_clientDataList.Append( (wxObject*) NULL );
  94         m_clientObjectList.Append( (wxObject*) NULL );
  95
  96         GtkWidget *item = gtk_menu_item_new_with_label( choices[i].mbc_str() );
  97         gtk_menu_append( GTK_MENU(menu), item );
  98
  99         gtk_widget_show( item );
 100
 101         gtk_signal_connect( GTK_OBJECT( item ), "activate",
 102           GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 103     }
 104     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 105
 106     m_parent->DoAddChild( this );
 107
 108     PostCreation();
 109
 110     SetBackgroundColour( parent->GetBackgroundColour() );
 111     SetForegroundColour( parent->GetForegroundColour() );
 112     SetFont( parent->GetFont() );
 113
 114     Show( TRUE );
 115
 116     return TRUE;
 117 }
 118
 119 wxChoice::~wxChoice()
 120 {
 121     Clear();
 122 }
 123
 124 void wxChoice::AppendCommon( const wxString &item )
 125 {
 126     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 127
 128     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 129     GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
 130
 131     gtk_menu_append( GTK_MENU(menu), menu_item );
 132
 133     if (GTK_WIDGET_REALIZED(m_widget))
 134     {
 135         gtk_widget_realize( menu_item );
 136         gtk_widget_realize( GTK_BIN(menu_item)->child );
 137
 138         if (m_widgetStyle) ApplyWidgetStyle();
 139     }
 140
 141     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 142       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 143
 144     gtk_widget_show( menu_item );
 145 }
 146
 147 void wxChoice::Append( const wxString &item )
 148 {
 149     m_clientDataList.Append( (wxObject*) NULL );
 150     m_clientObjectList.Append( (wxObject*) NULL );
 151
 152     AppendCommon( item );
 153 }
 154
 155 void wxChoice::Append( const wxString &item, void *clientData )
 156 {
 157     m_clientDataList.Append( (wxObject*) clientData );
 158     m_clientObjectList.Append( (wxObject*) NULL );
 159
 160     AppendCommon( item );
 161 }
 162
 163 void wxChoice::Append( const wxString &item, wxClientData *clientData )
 164 {
 165     m_clientObjectList.Append( (wxObject*) clientData );
 166     m_clientDataList.Append( (wxObject*) NULL );
 167
 168     AppendCommon( item );
 169 }
 170
 171 void wxChoice::SetClientData( int n, void* clientData )
 172 {
 173     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 174
 175     wxNode *node = m_clientDataList.Nth( n );
 176     if (!node) return;
 177
 178     node->SetData( (wxObject*) clientData );
 179 }
 180
 181 void* wxChoice::GetClientData( int n )
 182 {
 183     wxCHECK_MSG( m_widget != NULL, NULL, _T("invalid combobox") );
 184
 185     wxNode *node = m_clientDataList.Nth( n );
 186     if (!node) return NULL;
 187
 188     return node->Data();
 189 }
 190
 191 void wxChoice::SetClientObject( int n, wxClientData* clientData )
 192 {
 193     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 194
 195     wxNode *node = m_clientObjectList.Nth( n );
 196     if (!node) return;
 197
 198     wxClientData *cd = (wxClientData*) node->Data();
 199     if (cd) delete cd;
 200
 201     node->SetData( (wxObject*) clientData );
 202 }
 203
 204 wxClientData* wxChoice::GetClientObject( int n )
 205 {
 206     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, _T("invalid combobox") );
 207
 208     wxNode *node = m_clientObjectList.Nth( n );
 209     if (!node) return (wxClientData*) NULL;
 210
 211     return (wxClientData*) node->Data();
 212 }
 213
 214 void wxChoice::Clear()
 215 {
 216     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 217
 218     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 219     GtkWidget *menu = gtk_menu_new();
 220     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 221
 222     wxNode *node = m_clientObjectList.First();
 223     while (node)
 224     {
 225         wxClientData *cd = (wxClientData*)node->Data();
 226         if (cd) delete cd;
 227         node = node->Next();
 228     }
 229     m_clientObjectList.Clear();
 230
 231     m_clientDataList.Clear();
 232 }
 233
 234 void wxChoice::Delete( int WXUNUSED(n) )
 235 {
 236     wxFAIL_MSG( _T("wxChoice:Delete not implemented") );
 237 }
 238
 239 int wxChoice::FindString( const wxString &string ) const
 240 {
 241     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid choice") );
 242
 243     // If you read this code once and you think you understand
 244     // it, then you are very wrong. Robert Roebling.
 245
 246     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 247     int count = 0;
 248     GList *child = menu_shell->children;
 249     while (child)
 250     {
 251         GtkBin *bin = GTK_BIN( child->data );
 252         GtkLabel *label = (GtkLabel *) NULL;
 253         if (bin->child) label = GTK_LABEL(bin->child);
 254         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 255
 256         wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 257
 258        if (string == wxString(label->label,*wxConvCurrent))
 259            return count;
 260
 261        child = child->next;
 262        count++;
 263     }
 264
 265     return -1;
 266 }
 267
 268 int wxChoice::GetColumns() const
 269 {
 270     return 1;
 271 }
 272
 273 int wxChoice::GetSelection()
 274 {
 275     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid choice") );
 276
 277     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 278     int count = 0;
 279     GList *child = menu_shell->children;
 280     while (child)
 281     {
 282         GtkBin *bin = GTK_BIN( child->data );
 283         if (!bin->child) return count;
 284         child = child->next;
 285         count++;
 286     }
 287
 288     wxFAIL_MSG( _T("wxChoice: no selection") );
 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     gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 360 }
 361
 362 void wxChoice::SetStringSelection( const wxString &string )
 363 {
 364     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 365
 366     int n = FindString( string );
 367     if (n != -1) SetSelection( n );
 368 }
 369
 370 void wxChoice::ApplyWidgetStyle()
 371 {
 372     SetWidgetStyle();
 373
 374     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 375
 376     gtk_widget_set_style( m_widget, m_widgetStyle );
 377     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 378
 379     GList *child = menu_shell->children;
 380     while (child)
 381     {
 382         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 383
 384         GtkBin *bin = GTK_BIN( child->data );
 385         GtkWidget *label = (GtkWidget *) NULL;
 386         if (bin->child) label = bin->child;
 387         if (!label) label = GTK_BUTTON(m_widget)->child;
 388
 389         gtk_widget_set_style( label, m_widgetStyle );
 390
 391         child = child->next;
 392     }
 393 }
 394
 395 #endif