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->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->AddChild( this );
 103
 104     (m_parent->m_insertCallback)( m_parent, this );
 105
 106     PostCreation();
 107
 108     SetBackgroundColour( parent->GetBackgroundColour() );
 109     SetForegroundColour( parent->GetForegroundColour() );
 110     SetFont( parent->GetFont() );
 111
 112     Show( TRUE );
 113
 114     return TRUE;
 115 }
 116
 117 wxChoice::~wxChoice()
 118 {
 119     Clear();
 120 }
 121
 122 void wxChoice::AppendCommon( const wxString &item )
 123 {
 124     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 125
 126     GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
 127     GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
 128
 129     gtk_menu_append( GTK_MENU(menu), menu_item );
 130
 131     if (GTK_WIDGET_REALIZED(m_widget))
 132     {
 133         gtk_widget_realize( menu_item );
 134         gtk_widget_realize( GTK_BIN(menu_item)->child );
 135
 136         if (m_widgetStyle) ApplyWidgetStyle();
 137     }
 138
 139     gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
 140       GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
 141
 142     gtk_widget_show( menu_item );
 143 }
 144
 145 void wxChoice::Append( const wxString &item )
 146 {
 147     m_clientDataList.Append( (wxObject*) NULL );
 148     m_clientObjectList.Append( (wxObject*) NULL );
 149
 150     AppendCommon( item );
 151 }
 152
 153 void wxChoice::Append( const wxString &item, void *clientData )
 154 {
 155     m_clientDataList.Append( (wxObject*) clientData );
 156     m_clientObjectList.Append( (wxObject*) NULL );
 157
 158     AppendCommon( item );
 159 }
 160
 161 void wxChoice::Append( const wxString &item, wxClientData *clientData )
 162 {
 163     m_clientObjectList.Append( (wxObject*) clientData );
 164     m_clientDataList.Append( (wxObject*) NULL );
 165
 166     AppendCommon( item );
 167 }
 168
 169 void wxChoice::SetClientData( int n, void* clientData )
 170 {
 171     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 172
 173     wxNode *node = m_clientDataList.Nth( n );
 174     if (!node) return;
 175
 176     node->SetData( (wxObject*) clientData );
 177 }
 178
 179 void* wxChoice::GetClientData( int n )
 180 {
 181     wxCHECK_MSG( m_widget != NULL, NULL, _T("invalid combobox") );
 182
 183     wxNode *node = m_clientDataList.Nth( n );
 184     if (!node) return NULL;
 185
 186     return node->Data();
 187 }
 188
 189 void wxChoice::SetClientObject( int n, wxClientData* clientData )
 190 {
 191     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 192
 193     wxNode *node = m_clientObjectList.Nth( n );
 194     if (!node) return;
 195
 196     wxClientData *cd = (wxClientData*) node->Data();
 197     if (cd) delete cd;
 198
 199     node->SetData( (wxObject*) clientData );
 200 }
 201
 202 wxClientData* wxChoice::GetClientObject( int n )
 203 {
 204     wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, _T("invalid combobox") );
 205
 206     wxNode *node = m_clientObjectList.Nth( n );
 207     if (!node) return (wxClientData*) NULL;
 208
 209     return (wxClientData*) node->Data();
 210 }
 211
 212 void wxChoice::Clear()
 213 {
 214     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 215
 216     gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
 217     GtkWidget *menu = gtk_menu_new();
 218     gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
 219
 220     wxNode *node = m_clientObjectList.First();
 221     while (node)
 222     {
 223         wxClientData *cd = (wxClientData*)node->Data();
 224         if (cd) delete cd;
 225         node = node->Next();
 226     }
 227     m_clientObjectList.Clear();
 228
 229     m_clientDataList.Clear();
 230 }
 231
 232 void wxChoice::Delete( int WXUNUSED(n) )
 233 {
 234     wxFAIL_MSG( _T("wxChoice:Delete not implemented") );
 235 }
 236
 237 int wxChoice::FindString( const wxString &string ) const
 238 {
 239     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid choice") );
 240
 241     // If you read this code once and you think you understand
 242     // it, then you are very wrong. Robert Roebling.
 243
 244     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 245     int count = 0;
 246     GList *child = menu_shell->children;
 247     while (child)
 248     {
 249         GtkBin *bin = GTK_BIN( child->data );
 250         GtkLabel *label = (GtkLabel *) NULL;
 251         if (bin->child) label = GTK_LABEL(bin->child);
 252         if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 253
 254         wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 255
 256        if (string == label->label)
 257            return count;
 258
 259        child = child->next;
 260        count++;
 261     }
 262
 263     return -1;
 264 }
 265
 266 int wxChoice::GetColumns() const
 267 {
 268     return 1;
 269 }
 270
 271 int wxChoice::GetSelection()
 272 {
 273     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid choice") );
 274
 275     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 276     int count = 0;
 277     GList *child = menu_shell->children;
 278     while (child)
 279     {
 280         GtkBin *bin = GTK_BIN( child->data );
 281         if (!bin->child) return count;
 282         child = child->next;
 283         count++;
 284     }
 285
 286     wxFAIL_MSG( _T("wxChoice: no selection") );
 287
 288     return -1;
 289 }
 290
 291 wxString wxChoice::GetString( int n ) const
 292 {
 293     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid choice") );
 294
 295     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 296     int count = 0;
 297     GList *child = menu_shell->children;
 298     while (child)
 299     {
 300         GtkBin *bin = GTK_BIN( child->data );
 301         if (count == n)
 302         {
 303             GtkLabel *label = (GtkLabel *) NULL;
 304             if (bin->child) label = GTK_LABEL(bin->child);
 305             if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 306
 307             wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 308
 309             return label->label;
 310         }
 311         child = child->next;
 312         count++;
 313     }
 314
 315     wxFAIL_MSG( _T("wxChoice: invalid index in GetString()") );
 316
 317     return "";
 318 }
 319
 320 wxString wxChoice::GetStringSelection() const
 321 {
 322     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid choice") );
 323
 324     GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
 325
 326     wxASSERT_MSG( label != NULL , _T("wxChoice: invalid label") );
 327
 328     return label->label;
 329 }
 330
 331 int wxChoice::Number() const
 332 {
 333     wxCHECK_MSG( m_widget != NULL, 0, _T("invalid choice") );
 334
 335     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 336     int count = 0;
 337     GList *child = menu_shell->children;
 338     while (child)
 339     {
 340         count++;
 341         child = child->next;
 342     }
 343     return count;
 344 }
 345
 346 void wxChoice::SetColumns( int WXUNUSED(n) )
 347 {
 348 }
 349
 350 void wxChoice::SetSelection( int n )
 351 {
 352     wxCHECK_RET( m_widget != NULL, _T("invalid choice") );
 353
 354     int tmp = n;
 355     gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
 356
 357     gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
 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::ApplyWidgetStyle()
 369 {
 370     SetWidgetStyle();
 371
 372     GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
 373
 374     gtk_widget_set_style( m_widget, m_widgetStyle );
 375     gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
 376
 377     GList *child = menu_shell->children;
 378     while (child)
 379     {
 380         gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
 381
 382         GtkBin *bin = GTK_BIN( child->data );
 383         GtkWidget *label = (GtkWidget *) NULL;
 384         if (bin->child) label = bin->child;
 385         if (!label) label = GTK_BUTTON(m_widget)->child;
 386
 387         gtk_widget_set_style( label, m_widgetStyle );
 388
 389         child = child->next;
 390     }
 391 }
 392